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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtkwidgetprivate.h"
#include "gtkaccelgroupprivate.h"
#include "gtkaccessibleprivate.h"
#include "gtkactionobserverprivate.h"
#include "gtkapplicationprivate.h"
#include "gtkbuildable.h"
#include "gtkbuilderprivate.h"
#include "gtkconstraint.h"
#include "gtkcssboxesprivate.h"
#include "gtkcssfiltervalueprivate.h"
#include "gtkcsscolorvalueprivate.h"
#include "gtkcsstransformvalueprivate.h"
#include "gtkcsspositionvalueprivate.h"
#include "gtkcssfontvariationsvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcsswidgetnodeprivate.h"
#include "gtkdebug.h"
#include "gtkgestureprivate.h"
#include "gtklayoutmanagerprivate.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtknative.h"
#include "gtkprivate.h"
#include "gtkrenderbackgroundprivate.h"
#include "gtkrenderborderprivate.h"
#include "gtkrootprivate.h"
#include "gtknativeprivate.h"
#include "gtkscrollable.h"
#include "gtksettingsprivate.h"
#include "gtkshortcut.h"
#include "gtkshortcutcontrollerprivate.h"
#include "gtkshortcutmanager.h"
#include "gtkshortcutmanagerprivate.h"
#include "gtkshortcuttrigger.h"
#include "gtksizegroup-private.h"
#include "gtksnapshotprivate.h"
#include "deprecated/gtkstylecontextprivate.h"
#include "gtktooltipprivate.h"
#include "gsktransformprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetpaintableprivate.h"
#include "gtkwindowgroup.h"
#include "gtkwindowprivate.h"
#include "gtktestatcontextprivate.h"
#include "inspector/window.h"
#include "gdk/gdkeventsprivate.h"
#include "gdk/gdkprofilerprivate.h"
#include "gsk/gskdebugprivate.h"
#include "gsk/gskrendererprivate.h"
#include <cairo-gobject.h>
#include <locale.h>
#include <math.h>
#include <stdarg.h>
#include <string.h>
/**
* GtkWidget:
*
* The base class for all widgets.
*
* `GtkWidget` is the base class all widgets in GTK derive from. It manages the
* widget lifecycle, layout, states and style.
*
* ### Height-for-width Geometry Management
*
* GTK uses a height-for-width (and width-for-height) geometry management
* system. Height-for-width means that a widget can change how much
* vertical space it needs, depending on the amount of horizontal space
* that it is given (and similar for width-for-height). The most common
* example is a label that reflows to fill up the available width, wraps
* to fewer lines, and therefore needs less height.
*
* Height-for-width geometry management is implemented in GTK by way
* of two virtual methods:
*
* - [vfunc@Gtk.Widget.get_request_mode]
* - [vfunc@Gtk.Widget.measure]
*
* There are some important things to keep in mind when implementing
* height-for-width and when using it in widget implementations.
*
* If you implement a direct `GtkWidget` subclass that supports
* height-for-width or width-for-height geometry management for itself
* or its child widgets, the [vfunc@Gtk.Widget.get_request_mode] virtual
* function must be implemented as well and return the widget's preferred
* request mode. The default implementation of this virtual function
* returns %GTK_SIZE_REQUEST_CONSTANT_SIZE, which means that the widget will
* only ever get -1 passed as the for_size value to its
* [vfunc@Gtk.Widget.measure] implementation.
*
* The geometry management system will query a widget hierarchy in
* only one orientation at a time. When widgets are initially queried
* for their minimum sizes it is generally done in two initial passes
* in the [enum@Gtk.SizeRequestMode] chosen by the toplevel.
*
* For example, when queried in the normal %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH mode:
*
* First, the default minimum and natural width for each widget
* in the interface will be computed using [method@Gtk.Widget.measure] with an
* orientation of %GTK_ORIENTATION_HORIZONTAL and a for_size of -1.
* Because the preferred widths for each widget depend on the preferred
* widths of their children, this information propagates up the hierarchy,
* and finally a minimum and natural width is determined for the entire
* toplevel. Next, the toplevel will use the minimum width to query for the
* minimum height contextual to that width using [method@Gtk.Widget.measure] with an
* orientation of %GTK_ORIENTATION_VERTICAL and a for_size of the just computed
* width. This will also be a highly recursive operation. The minimum height
* for the minimum width is normally used to set the minimum size constraint
* on the toplevel.
*
* After the toplevel window has initially requested its size in both
* dimensions it can go on to allocate itself a reasonable size (or a size
* previously specified with [method@Gtk.Window.set_default_size]). During the
* recursive allocation process it’s important to note that request cycles
* will be recursively executed while widgets allocate their children.
* Each widget, once allocated a size, will go on to first share the
* space in one orientation among its children and then request each child's
* height for its target allocated width or its width for allocated height,
* depending. In this way a `GtkWidget` will typically be requested its size
* a number of times before actually being allocated a size. The size a
* widget is finally allocated can of course differ from the size it has
* requested. For this reason, `GtkWidget` caches a small number of results
* to avoid re-querying for the same sizes in one allocation cycle.
*
* If a widget does move content around to intelligently use up the
* allocated size then it must support the request in both
* `GtkSizeRequestMode`s even if the widget in question only
* trades sizes in a single orientation.
*
* For instance, a [class@Gtk.Label] that does height-for-width word wrapping
* will not expect to have [vfunc@Gtk.Widget.measure] with an orientation of
* %GTK_ORIENTATION_VERTICAL called because that call is specific to a
* width-for-height request. In this case the label must return the height
* required for its own minimum possible width. By following this rule any
* widget that handles height-for-width or width-for-height requests will
* always be allocated at least enough space to fit its own content.
*
* Here are some examples of how a %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH widget
* generally deals with width-for-height requests:
*
* ```c
* static void
* foo_widget_measure (GtkWidget *widget,
* GtkOrientation orientation,
* int for_size,
* int *minimum_size,
* int *natural_size,
* int *minimum_baseline,
* int *natural_baseline)
* {
* if (orientation == GTK_ORIENTATION_HORIZONTAL)
* {
* // Calculate minimum and natural width
* }
* else // VERTICAL
* {
* if (i_am_in_height_for_width_mode)
* {
* int min_width, dummy;
*
* // First, get the minimum width of our widget
* GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
* &min_width, &dummy, &dummy, &dummy);
*
* // Now use the minimum width to retrieve the minimum and natural height to display
* // that width.
* GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_VERTICAL, min_width,
* minimum_size, natural_size, &dummy, &dummy);
* }
* else
* {
* // ... some widgets do both.
* }
* }
* }
* ```
*
* Often a widget needs to get its own request during size request or
* allocation. For example, when computing height it may need to also
* compute width. Or when deciding how to use an allocation, the widget
* may need to know its natural size. In these cases, the widget should
* be careful to call its virtual methods directly, like in the code
* example above.
*
* It will not work to use the wrapper function [method@Gtk.Widget.measure]
* inside your own [vfunc@Gtk.Widget.size_allocate] implementation.
* These return a request adjusted by [class@Gtk.SizeGroup], the widget's
* align and expand flags, as well as its CSS style.
*
* If a widget used the wrappers inside its virtual method implementations,
* then the adjustments (such as widget margins) would be applied
* twice. GTK therefore does not allow this and will warn if you try
* to do it.
*
* Of course if you are getting the size request for another widget, such
* as a child widget, you must use [method@Gtk.Widget.measure]; otherwise, you
* would not properly consider widget margins, [class@Gtk.SizeGroup], and
* so forth.
*
* GTK also supports baseline vertical alignment of widgets. This
* means that widgets are positioned such that the typographical baseline of
* widgets in the same row are aligned. This happens if a widget supports
* baselines, has a vertical alignment using baselines, and is inside
* a widget that supports baselines and has a natural “row” that it aligns to
* the baseline, or a baseline assigned to it by the grandparent.
*
* Baseline alignment support for a widget is also done by the
* [vfunc@Gtk.Widget.measure] virtual function. It allows you to report
* both a minimum and natural size.
*
* If a widget ends up baseline aligned it will be allocated all the space in
* the parent as if it was %GTK_ALIGN_FILL, but the selected baseline can be
* found via [method@Gtk.Widget.get_baseline]. If the baseline has a
* value other than -1 you need to align the widget such that the baseline
* appears at the position.
*
* ### GtkWidget as GtkBuildable
*
* The `GtkWidget` implementation of the `GtkBuildable` interface
* supports various custom elements to specify additional aspects of widgets
* that are not directly expressed as properties.
*
* If the widget uses a [class@Gtk.LayoutManager], `GtkWidget` supports
* a custom `<layout>` element, used to define layout properties:
*
* ```xml
* <object class="GtkGrid" id="my_grid">
* <child>
* <object class="GtkLabel" id="label1">
* <property name="label">Description</property>
* <layout>
* <property name="column">0</property>
* <property name="row">0</property>
* <property name="row-span">1</property>
* <property name="column-span">1</property>
* </layout>
* </object>
* </child>
* <child>
* <object class="GtkEntry" id="description_entry">
* <layout>
* <property name="column">1</property>
* <property name="row">0</property>
* <property name="row-span">1</property>
* <property name="column-span">1</property>
* </layout>
* </object>
* </child>
* </object>
* ```
*
* `GtkWidget` allows style information such as style classes to
* be associated with widgets, using the custom `<style>` element:
*
* ```xml
* <object class="GtkButton" id="button1">
* <style>
* <class name="my-special-button-class"/>
* <class name="dark-button"/>
* </style>
* </object>
* ```
*
* `GtkWidget` allows defining accessibility information, such as properties,
* relations, and states, using the custom `<accessibility>` element:
*
* ```xml
* <object class="GtkButton" id="button1">
* <accessibility>
* <property name="label">Download</property>
* <relation name="labelled-by">label1</relation>
* </accessibility>
* </object>
* ```
*
* ### Building composite widgets from template XML
*
* `GtkWidget `exposes some facilities to automate the procedure
* of creating composite widgets using "templates".
*
* To create composite widgets with `GtkBuilder` XML, one must associate
* the interface description with the widget class at class initialization
* time using [method@Gtk.WidgetClass.set_template].
*
* The interface description semantics expected in composite template descriptions
* is slightly different from regular [class@Gtk.Builder] XML.
*
* Unlike regular interface descriptions, [method@Gtk.WidgetClass.set_template]
* will expect a `<template>` tag as a direct child of the toplevel
* `<interface>` tag. The `<template>` tag must specify the “class” attribute
* which must be the type name of the widget. Optionally, the “parent”
* attribute may be specified to specify the direct parent type of the widget
* type; this is ignored by `GtkBuilder` but can be used by UI design tools to
* introspect what kind of properties and internal children exist for a given
* type when the actual type does not exist.
*
* The XML which is contained inside the `<template>` tag behaves as if it were
* added to the `<object>` tag defining the widget itself. You may set properties
* on a widget by inserting `<property>` tags into the `<template>` tag, and also
* add `<child>` tags to add children and extend a widget in the normal way you
* would with `<object>` tags.
*
* Additionally, `<object>` tags can also be added before and after the initial
* `<template>` tag in the normal way, allowing one to define auxiliary objects
* which might be referenced by other widgets declared as children of the
* `<template>` tag.
*
* Since, unlike the `<object>` tag, the `<template>` tag does not contain an
* “id” attribute, if you need to refer to the instance of the object itself that
* the template will create, simply refer to the template class name in an
* applicable element content.
*
* Here is an example of a template definition, which includes an example of
* this in the `<signal>` tag:
*
* ```xml
* <interface>
* <template class="FooWidget" parent="GtkBox">
* <property name="orientation">horizontal</property>
* <property name="spacing">4</property>
* <child>
* <object class="GtkButton" id="hello_button">
* <property name="label">Hello World</property>
* <signal name="clicked" handler="hello_button_clicked" object="FooWidget" swapped="yes"/>
* </object>
* </child>
* <child>
* <object class="GtkButton" id="goodbye_button">
* <property name="label">Goodbye World</property>
* </object>
* </child>
* </template>
* </interface>
* ```
*
* Typically, you'll place the template fragment into a file that is
* bundled with your project, using `GResource`. In order to load the
* template, you need to call [method@Gtk.WidgetClass.set_template_from_resource]
* from the class initialization of your `GtkWidget` type:
*
* ```c
* static void
* foo_widget_class_init (FooWidgetClass *klass)
* {
* // ...
*
* gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
* "/com/example/ui/foowidget.ui");
* }
* ```
*
* You will also need to call [method@Gtk.Widget.init_template] from the
* instance initialization function:
*
* ```c
* static void
* foo_widget_init (FooWidget *self)
* {
* gtk_widget_init_template (GTK_WIDGET (self));
*
* // Initialize the rest of the widget...
* }
* ```
*
* as well as calling [method@Gtk.Widget.dispose_template] from the dispose
* function:
*
* ```c
* static void
* foo_widget_dispose (GObject *gobject)
* {
* FooWidget *self = FOO_WIDGET (gobject);
*
* // Dispose objects for which you have a reference...
*
* // Clear the template children for this widget type
* gtk_widget_dispose_template (GTK_WIDGET (self), FOO_TYPE_WIDGET);
*
* G_OBJECT_CLASS (foo_widget_parent_class)->dispose (gobject);
* }
* ```
*
* You can access widgets defined in the template using the
* [method@Gtk.Widget.get_template_child] function, but you will typically declare
* a pointer in the instance private data structure of your type using the same
* name as the widget in the template definition, and call
* [method@Gtk.WidgetClass.bind_template_child_full] (or one of its wrapper macros
* [func@Gtk.widget_class_bind_template_child] and [func@Gtk.widget_class_bind_template_child_private])
* with that name, e.g.
*
* ```c
* typedef struct {
* GtkWidget *hello_button;
* GtkWidget *goodbye_button;
* } FooWidgetPrivate;
*
* G_DEFINE_TYPE_WITH_PRIVATE (FooWidget, foo_widget, GTK_TYPE_BOX)
*
* static void
* foo_widget_dispose (GObject *gobject)
* {
* gtk_widget_dispose_template (GTK_WIDGET (gobject), FOO_TYPE_WIDGET);
*
* G_OBJECT_CLASS (foo_widget_parent_class)->dispose (gobject);
* }
*
* static void
* foo_widget_class_init (FooWidgetClass *klass)
* {
* // ...
* G_OBJECT_CLASS (klass)->dispose = foo_widget_dispose;
*
* gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
* "/com/example/ui/foowidget.ui");
* gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass),
* FooWidget, hello_button);
* gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass),
* FooWidget, goodbye_button);
* }
*
* static void
* foo_widget_init (FooWidget *widget)
* {
* gtk_widget_init_template (GTK_WIDGET (widget));
* }
* ```
*
* You can also use [method@Gtk.WidgetClass.bind_template_callback_full] (or
* is wrapper macro [func@Gtk.widget_class_bind_template_callback]) to connect
* a signal callback defined in the template with a function visible in the
* scope of the class, e.g.
*
* ```c
* // the signal handler has the instance and user data swapped
* // because of the swapped="yes" attribute in the template XML
* static void
* hello_button_clicked (FooWidget *self,
* GtkButton *button)
* {
* g_print ("Hello, world!\n");
* }
*
* static void
* foo_widget_class_init (FooWidgetClass *klass)
* {
* // ...
* gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
* "/com/example/ui/foowidget.ui");
* gtk_widget_class_bind_template_callback (GTK_WIDGET_CLASS (klass), hello_button_clicked);
* }
* ```
*/
#define GTK_STATE_FLAGS_DO_SET_PROPAGATE (GTK_STATE_FLAG_INSENSITIVE | \
GTK_STATE_FLAG_BACKDROP)
#define GTK_STATE_FLAGS_DO_UNSET_PROPAGATE (GTK_STATE_FLAG_INSENSITIVE | \
GTK_STATE_FLAG_BACKDROP | \
GTK_STATE_FLAG_PRELIGHT | \
GTK_STATE_FLAG_ACTIVE)
typedef struct {
char *name; /* Name of the template automatic child */
gboolean internal_child; /* Whether the automatic widget should be exported as an <internal-child> */
gssize offset; /* Instance private data offset where to set the automatic child (or 0) */
} AutomaticChildClass;
enum {
DESTROY,
SHOW,
HIDE,
MAP,
UNMAP,
REALIZE,
UNREALIZE,
STATE_FLAGS_CHANGED,
DIRECTION_CHANGED,
MNEMONIC_ACTIVATE,
MOVE_FOCUS,
KEYNAV_FAILED,
QUERY_TOOLTIP,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_NAME,
PROP_PARENT,
PROP_ROOT,
PROP_WIDTH_REQUEST,
PROP_HEIGHT_REQUEST,
PROP_VISIBLE,
PROP_SENSITIVE,
PROP_CAN_FOCUS,
PROP_HAS_FOCUS,
PROP_CAN_TARGET,
PROP_FOCUS_ON_CLICK,
PROP_FOCUSABLE,
PROP_HAS_DEFAULT,
PROP_RECEIVES_DEFAULT,
PROP_CURSOR,
PROP_HAS_TOOLTIP,
PROP_TOOLTIP_MARKUP,
PROP_TOOLTIP_TEXT,
PROP_OPACITY,
PROP_OVERFLOW,
PROP_HALIGN,
PROP_VALIGN,
PROP_MARGIN_START,
PROP_MARGIN_END,
PROP_MARGIN_TOP,
PROP_MARGIN_BOTTOM,
PROP_HEXPAND,
PROP_VEXPAND,
PROP_HEXPAND_SET,
PROP_VEXPAND_SET,
PROP_SCALE_FACTOR,
PROP_CSS_NAME,
PROP_CSS_CLASSES,
PROP_LAYOUT_MANAGER,
NUM_PROPERTIES,
/* GtkAccessible */
PROP_ACCESSIBLE_ROLE
};
typedef struct
{
guint flags_to_set;
guint flags_to_unset;
int old_scale_factor;
} GtkStateData;
static void gtk_widget_base_class_init (gpointer g_class);
static void gtk_widget_class_init (GtkWidgetClass *klass);
static void gtk_widget_base_class_finalize (GtkWidgetClass *klass);
static void gtk_widget_init (GTypeInstance *instance,
gpointer g_class);
static void gtk_widget_dispose (GObject *object);
static void gtk_widget_finalize (GObject *object);
static void gtk_widget_real_destroy (GtkWidget *object);
static gboolean gtk_widget_real_focus (GtkWidget *widget,
GtkDirectionType direction);
static void gtk_widget_real_show (GtkWidget *widget);
static void gtk_widget_real_hide (GtkWidget *widget);
static void gtk_widget_real_map (GtkWidget *widget);
static void gtk_widget_real_unmap (GtkWidget *widget);
static void gtk_widget_real_realize (GtkWidget *widget);
static void gtk_widget_real_unrealize (GtkWidget *widget);
static void gtk_widget_real_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction);
static void gtk_widget_real_css_changed (GtkWidget *widget,
GtkCssStyleChange *change);
static void gtk_widget_real_system_setting_changed (GtkWidget *widget,
GtkSystemSetting setting);
static void gtk_widget_real_set_focus_child (GtkWidget *widget,
GtkWidget *child);
static void gtk_widget_real_move_focus (GtkWidget *widget,
GtkDirectionType direction);
static gboolean gtk_widget_real_keynav_failed (GtkWidget *widget,
GtkDirectionType direction);
#ifdef G_ENABLE_CONSISTENCY_CHECKS
static void gtk_widget_verify_invariants (GtkWidget *widget);
static void gtk_widget_push_verify_invariants (GtkWidget *widget);
static void gtk_widget_pop_verify_invariants (GtkWidget *widget);
#else
#define gtk_widget_verify_invariants(widget)
#define gtk_widget_push_verify_invariants(widget)
#define gtk_widget_pop_verify_invariants(widget)
#endif
static PangoContext* gtk_widget_peek_pango_context (GtkWidget *widget);
static void gtk_widget_update_default_pango_context (GtkWidget *widget);
static void gtk_widget_propagate_state (GtkWidget *widget,
const GtkStateData *data);
static gboolean gtk_widget_real_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling);
static void gtk_widget_accessible_interface_init (GtkAccessibleInterface *iface);
static void gtk_widget_buildable_interface_init (GtkBuildableIface *iface);
static void gtk_widget_buildable_set_id (GtkBuildable *buildable,
const char *id);
static const char * gtk_widget_buildable_get_id (GtkBuildable *buildable);
static GObject * gtk_widget_buildable_get_internal_child (GtkBuildable *buildable,
GtkBuilder *builder,
const char *childname);
static gboolean gtk_widget_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
GtkBuildableParser *parser,
gpointer *data);
static void gtk_widget_buildable_custom_tag_end (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
gpointer data);
static void gtk_widget_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
gpointer data);
static void gtk_widget_set_usize_internal (GtkWidget *widget,
int width,
int height);
static void remove_parent_surface_transform_changed_listener (GtkWidget *widget);
static void add_parent_surface_transform_changed_listener (GtkWidget *widget);
static void gtk_widget_queue_compute_expand (GtkWidget *widget);
static GtkATContext *create_at_context (GtkWidget *self);
static int GtkWidget_private_offset = 0;
static gpointer gtk_widget_parent_class = NULL;
static guint widget_signals[LAST_SIGNAL] = { 0 };
static GParamSpec *widget_props[NUM_PROPERTIES] = { NULL, };
GtkTextDirection gtk_default_direction = GTK_TEXT_DIR_LTR;
static GQuark quark_pango_context = 0;
static GQuark quark_mnemonic_labels = 0;
static GQuark quark_size_groups = 0;
static GQuark quark_auto_children = 0;
static GQuark quark_font_options = 0;
static GQuark quark_font_map = 0;
static GQuark quark_builder_set_id = 0;
GType
gtk_widget_get_type (void)
{
static GType widget_type = 0;
if (G_UNLIKELY (widget_type == 0))
{
const GTypeInfo widget_info =
{
sizeof (GtkWidgetClass),
gtk_widget_base_class_init,
(GBaseFinalizeFunc) gtk_widget_base_class_finalize,
(GClassInitFunc) gtk_widget_class_init,
NULL, /* class_finalize */
NULL, /* class_init */
sizeof (GtkWidget),
0, /* n_preallocs */
gtk_widget_init,
NULL, /* value_table */
};
const GInterfaceInfo accessible_info =
{
(GInterfaceInitFunc) gtk_widget_accessible_interface_init,
(GInterfaceFinalizeFunc) NULL,
NULL,
};
const GInterfaceInfo buildable_info =
{
(GInterfaceInitFunc) gtk_widget_buildable_interface_init,
(GInterfaceFinalizeFunc) NULL,
NULL /* interface data */
};
const GInterfaceInfo constraint_target_info =
{
(GInterfaceInitFunc) NULL,
(GInterfaceFinalizeFunc) NULL,
NULL /* interface data */
};
widget_type = g_type_register_static (G_TYPE_INITIALLY_UNOWNED, g_intern_static_string ("GtkWidget"),
&widget_info, G_TYPE_FLAG_ABSTRACT);
g_type_add_class_private (widget_type, sizeof (GtkWidgetClassPrivate));
GtkWidget_private_offset = g_type_add_instance_private (widget_type, sizeof (GtkWidgetPrivate));
g_type_add_interface_static (widget_type, GTK_TYPE_ACCESSIBLE,
&accessible_info);
g_type_add_interface_static (widget_type, GTK_TYPE_BUILDABLE,
&buildable_info);
g_type_add_interface_static (widget_type, GTK_TYPE_CONSTRAINT_TARGET,
&constraint_target_info);
}
return widget_type;
}
static inline gpointer
gtk_widget_get_instance_private (GtkWidget *self)
{
return (G_STRUCT_MEMBER_P (self, GtkWidget_private_offset));
}
static void
gtk_widget_base_class_init (gpointer g_class)
{
GtkWidgetClass *klass = g_class;
GtkWidgetClassPrivate *priv;
priv = klass->priv = G_TYPE_CLASS_GET_PRIVATE (g_class, GTK_TYPE_WIDGET, GtkWidgetClassPrivate);
priv->template = NULL;
if (priv->shortcuts == NULL)
{
priv->shortcuts = g_list_store_new (GTK_TYPE_SHORTCUT);
}
else
{
GListModel *parent_shortcuts = G_LIST_MODEL (priv->shortcuts);
guint i, p;
priv->shortcuts = g_list_store_new (GTK_TYPE_SHORTCUT);
for (i = 0, p = g_list_model_get_n_items (parent_shortcuts); i < p; i++)
{
GtkShortcut *shortcut = g_list_model_get_item (parent_shortcuts, i);
g_list_store_append (priv->shortcuts, shortcut);
g_object_unref (shortcut);
}
}
}
static void
gtk_widget_real_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkWidget *child;
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
gtk_widget_snapshot_child (widget, child, snapshot);
}
static gboolean
gtk_widget_real_contains (GtkWidget *widget,
double x,
double y)
{
GtkCssBoxes boxes;
gtk_css_boxes_init (&boxes, widget);
return gsk_rounded_rect_contains_point (gtk_css_boxes_get_border_box (&boxes),
&GRAPHENE_POINT_INIT (x, y));
}
static void
gtk_widget_real_root (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
gtk_widget_forall (widget, (GtkCallback) gtk_widget_root, NULL);
for (l = priv->event_controllers; l; l = l->next)
{
if (GTK_IS_SHORTCUT_CONTROLLER (l->data))
gtk_shortcut_controller_root (GTK_SHORTCUT_CONTROLLER (l->data));
}
}
static void
gtk_widget_real_unroot (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
for (l = priv->event_controllers; l; l = l->next)
{
if (GTK_IS_SHORTCUT_CONTROLLER (l->data))
gtk_shortcut_controller_unroot (GTK_SHORTCUT_CONTROLLER (l->data));
}
gtk_widget_forall (widget, (GtkCallback) gtk_widget_unroot, NULL);
}
static void
gtk_widget_constructed (GObject *object)
{
G_OBJECT_CLASS (gtk_widget_parent_class)->constructed (object);
if (GTK_WIDGET_GET_CLASS (object)->priv->actions)
{
GtkActionMuxer *muxer;
muxer = _gtk_widget_get_action_muxer (GTK_WIDGET (object), TRUE);
gtk_action_muxer_connect_class_actions (muxer);
}
}
static void
gtk_widget_real_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
*minimum = 0;
*natural = 0;
}
static GtkSizeRequestMode
gtk_widget_real_get_request_mode (GtkWidget *widget)
{
/* By default widgets don't trade size at all. */
return GTK_SIZE_REQUEST_CONSTANT_SIZE;
}
static void
gtk_widget_real_state_flags_changed (GtkWidget *widget,
GtkStateFlags old_state)
{
}
static gboolean
gtk_widget_real_query_tooltip (GtkWidget *widget,
int x,
int y,
gboolean keyboard_tip,
GtkTooltip *tooltip)
{
const char *tooltip_markup;
gboolean has_tooltip;
has_tooltip = gtk_widget_get_has_tooltip (widget);
tooltip_markup = gtk_widget_get_tooltip_markup (widget);
if (tooltip_markup == NULL)
tooltip_markup = gtk_widget_get_tooltip_text (widget);
if (has_tooltip && tooltip_markup != NULL)
{
gtk_tooltip_set_markup (tooltip, tooltip_markup);
return TRUE;
}
return FALSE;
}
static void
gtk_widget_real_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
}
static void
gtk_widget_set_accessible_role (GtkWidget *self,
GtkAccessibleRole role)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
g_return_if_fail (!gtk_accessible_role_is_abstract (role));
if (priv->at_context == NULL || !gtk_at_context_is_realized (priv->at_context))
{
priv->accessible_role = role;
if (priv->at_context != NULL)
gtk_at_context_set_accessible_role (priv->at_context, role);
g_object_notify (G_OBJECT (self), "accessible-role");
}
else
{
char *role_str = g_enum_to_string (GTK_TYPE_ACCESSIBLE_ROLE, priv->accessible_role);
g_critical ("Widget of type “%s” already has an accessible role of type “%s”",
G_OBJECT_TYPE_NAME (self),
role_str);
g_free (role_str);
}
}
static GtkAccessibleRole
gtk_widget_get_accessible_role (GtkWidget *self)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
GtkATContext *context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (self));
if (context != NULL)
{
GtkAccessibleRole role = GTK_ACCESSIBLE_ROLE_WIDGET;
if (gtk_at_context_is_realized (context))
role = gtk_at_context_get_accessible_role (context);
g_object_unref (context);
if (role != GTK_ACCESSIBLE_ROLE_WIDGET)
return role;
}
if (priv->accessible_role != GTK_ACCESSIBLE_ROLE_WIDGET)
return priv->accessible_role;
if (GTK_WIDGET_GET_CLASS (self)->priv->accessible_role != GTK_ACCESSIBLE_ROLE_WIDGET)
return GTK_WIDGET_GET_CLASS (self)->priv->accessible_role;
return GTK_ACCESSIBLE_ROLE_GENERIC;
}
static void
gtk_widget_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkWidget *widget = GTK_WIDGET (object);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
switch (prop_id)
{
case PROP_NAME:
gtk_widget_set_name (widget, g_value_get_string (value));
break;
case PROP_WIDTH_REQUEST:
gtk_widget_set_usize_internal (widget, g_value_get_int (value), -2);
break;
case PROP_HEIGHT_REQUEST:
gtk_widget_set_usize_internal (widget, -2, g_value_get_int (value));
break;
case PROP_VISIBLE:
gtk_widget_set_visible (widget, g_value_get_boolean (value));
break;
case PROP_SENSITIVE:
gtk_widget_set_sensitive (widget, g_value_get_boolean (value));
break;
case PROP_CAN_FOCUS:
gtk_widget_set_can_focus (widget, g_value_get_boolean (value));
break;
case PROP_FOCUSABLE:
gtk_widget_set_focusable (widget, g_value_get_boolean (value));
break;
case PROP_CAN_TARGET:
gtk_widget_set_can_target (widget, g_value_get_boolean (value));
break;
case PROP_FOCUS_ON_CLICK:
gtk_widget_set_focus_on_click (widget, g_value_get_boolean (value));
break;
case PROP_RECEIVES_DEFAULT:
gtk_widget_set_receives_default (widget, g_value_get_boolean (value));
break;
case PROP_CURSOR:
gtk_widget_set_cursor (widget, g_value_get_object (value));
break;
case PROP_HAS_TOOLTIP:
gtk_widget_set_has_tooltip (widget, g_value_get_boolean (value));
break;
case PROP_TOOLTIP_MARKUP:
gtk_widget_set_tooltip_markup (widget, g_value_get_string (value));
break;
case PROP_TOOLTIP_TEXT:
gtk_widget_set_tooltip_text (widget, g_value_get_string (value));
break;
case PROP_HALIGN:
gtk_widget_set_halign (widget, g_value_get_enum (value));
break;
case PROP_VALIGN:
gtk_widget_set_valign (widget, g_value_get_enum (value));
break;
case PROP_MARGIN_START:
gtk_widget_set_margin_start (widget, g_value_get_int (value));
break;
case PROP_MARGIN_END:
gtk_widget_set_margin_end (widget, g_value_get_int (value));
break;
case PROP_MARGIN_TOP:
gtk_widget_set_margin_top (widget, g_value_get_int (value));
break;
case PROP_MARGIN_BOTTOM:
gtk_widget_set_margin_bottom (widget, g_value_get_int (value));
break;
case PROP_HEXPAND:
gtk_widget_set_hexpand (widget, g_value_get_boolean (value));
break;
case PROP_HEXPAND_SET:
gtk_widget_set_hexpand_set (widget, g_value_get_boolean (value));
break;
case PROP_VEXPAND:
gtk_widget_set_vexpand (widget, g_value_get_boolean (value));
break;
case PROP_VEXPAND_SET:
gtk_widget_set_vexpand_set (widget, g_value_get_boolean (value));
break;
case PROP_OPACITY:
gtk_widget_set_opacity (widget, g_value_get_double (value));
break;
case PROP_OVERFLOW:
gtk_widget_set_overflow (widget, g_value_get_enum (value));
break;
case PROP_CSS_NAME:
if (g_value_get_string (value) != NULL)
gtk_css_node_set_name (priv->cssnode, g_quark_from_string (g_value_get_string (value)));
break;
case PROP_CSS_CLASSES:
gtk_widget_set_css_classes (widget, g_value_get_boxed (value));
break;
case PROP_LAYOUT_MANAGER:
gtk_widget_set_layout_manager (widget, g_value_dup_object (value));
break;
case PROP_ACCESSIBLE_ROLE:
gtk_widget_set_accessible_role (widget, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_widget_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkWidget *widget = GTK_WIDGET (object);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
switch (prop_id)
{
case PROP_NAME:
if (priv->name)
g_value_set_string (value, priv->name);
else
g_value_set_static_string (value, "");
break;
case PROP_PARENT:
g_value_set_object (value, priv->parent);
break;
case PROP_ROOT:
g_value_set_object (value, priv->root);
break;
case PROP_WIDTH_REQUEST:
{
int w;
gtk_widget_get_size_request (widget, &w, NULL);
g_value_set_int (value, w);
}
break;
case PROP_HEIGHT_REQUEST:
{
int h;
gtk_widget_get_size_request (widget, NULL, &h);
g_value_set_int (value, h);
}
break;
case PROP_VISIBLE:
g_value_set_boolean (value, _gtk_widget_get_visible (widget));
break;
case PROP_SENSITIVE:
g_value_set_boolean (value, gtk_widget_get_sensitive (widget));
break;
case PROP_CAN_FOCUS:
g_value_set_boolean (value, gtk_widget_get_can_focus (widget));
break;
case PROP_FOCUSABLE:
g_value_set_boolean (value, gtk_widget_get_focusable (widget));
break;
case PROP_HAS_FOCUS:
g_value_set_boolean (value, gtk_widget_has_focus (widget));
break;
case PROP_CAN_TARGET:
g_value_set_boolean (value, gtk_widget_get_can_target (widget));
break;
case PROP_FOCUS_ON_CLICK:
g_value_set_boolean (value, gtk_widget_get_focus_on_click (widget));
break;
case PROP_HAS_DEFAULT:
g_value_set_boolean (value, gtk_widget_has_default (widget));
break;
case PROP_RECEIVES_DEFAULT:
g_value_set_boolean (value, gtk_widget_get_receives_default (widget));
break;
case PROP_CURSOR:
g_value_set_object (value, gtk_widget_get_cursor (widget));
break;
case PROP_HAS_TOOLTIP:
g_value_set_boolean (value, gtk_widget_get_has_tooltip (widget));
break;
case PROP_TOOLTIP_TEXT:
g_value_set_string (value, gtk_widget_get_tooltip_text (widget));
break;
case PROP_TOOLTIP_MARKUP:
g_value_set_string (value, gtk_widget_get_tooltip_markup (widget));
break;
case PROP_HALIGN:
g_value_set_enum (value, gtk_widget_get_halign (widget));
break;
case PROP_VALIGN:
g_value_set_enum (value, gtk_widget_get_valign (widget));
break;
case PROP_MARGIN_START:
g_value_set_int (value, gtk_widget_get_margin_start (widget));
break;
case PROP_MARGIN_END:
g_value_set_int (value, gtk_widget_get_margin_end (widget));
break;
case PROP_MARGIN_TOP:
g_value_set_int (value, gtk_widget_get_margin_top (widget));
break;
case PROP_MARGIN_BOTTOM:
g_value_set_int (value, gtk_widget_get_margin_bottom (widget));
break;
case PROP_HEXPAND:
g_value_set_boolean (value, gtk_widget_get_hexpand (widget));
break;
case PROP_HEXPAND_SET:
g_value_set_boolean (value, gtk_widget_get_hexpand_set (widget));
break;
case PROP_VEXPAND:
g_value_set_boolean (value, gtk_widget_get_vexpand (widget));
break;
case PROP_VEXPAND_SET:
g_value_set_boolean (value, gtk_widget_get_vexpand_set (widget));
break;
case PROP_OPACITY:
g_value_set_double (value, gtk_widget_get_opacity (widget));
break;
case PROP_OVERFLOW:
g_value_set_enum (value, gtk_widget_get_overflow (widget));
break;
case PROP_SCALE_FACTOR:
g_value_set_int (value, gtk_widget_get_scale_factor (widget));
break;
case PROP_CSS_NAME:
g_value_set_string (value, gtk_widget_get_css_name (widget));
break;
case PROP_CSS_CLASSES:
g_value_take_boxed (value, gtk_widget_get_css_classes (widget));
break;
case PROP_LAYOUT_MANAGER:
g_value_set_object (value, gtk_widget_get_layout_manager (widget));
break;
case PROP_ACCESSIBLE_ROLE:
g_value_set_enum (value, gtk_widget_get_accessible_role (widget));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_widget_class_init (GtkWidgetClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
g_type_class_adjust_private_offset (klass, &GtkWidget_private_offset);
gtk_widget_parent_class = g_type_class_peek_parent (klass);
quark_pango_context = g_quark_from_static_string ("gtk-pango-context");
quark_mnemonic_labels = g_quark_from_static_string ("gtk-mnemonic-labels");
quark_size_groups = g_quark_from_static_string ("gtk-widget-size-groups");
quark_auto_children = g_quark_from_static_string ("gtk-widget-auto-children");
quark_font_options = g_quark_from_static_string ("gtk-widget-font-options");
quark_font_map = g_quark_from_static_string ("gtk-widget-font-map");
gobject_class->constructed = gtk_widget_constructed;
gobject_class->dispose = gtk_widget_dispose;
gobject_class->finalize = gtk_widget_finalize;
gobject_class->set_property = gtk_widget_set_property;
gobject_class->get_property = gtk_widget_get_property;
klass->show = gtk_widget_real_show;
klass->hide = gtk_widget_real_hide;
klass->map = gtk_widget_real_map;
klass->unmap = gtk_widget_real_unmap;
klass->realize = gtk_widget_real_realize;
klass->unrealize = gtk_widget_real_unrealize;
klass->root = gtk_widget_real_root;
klass->unroot = gtk_widget_real_unroot;
klass->size_allocate = gtk_widget_real_size_allocate;
klass->get_request_mode = gtk_widget_real_get_request_mode;
klass->measure = gtk_widget_real_measure;
klass->state_flags_changed = gtk_widget_real_state_flags_changed;
klass->direction_changed = gtk_widget_real_direction_changed;
klass->snapshot = gtk_widget_real_snapshot;
klass->mnemonic_activate = gtk_widget_real_mnemonic_activate;
klass->grab_focus = gtk_widget_grab_focus_self;
klass->focus = gtk_widget_real_focus;
klass->set_focus_child = gtk_widget_real_set_focus_child;
klass->move_focus = gtk_widget_real_move_focus;
klass->keynav_failed = gtk_widget_real_keynav_failed;
klass->query_tooltip = gtk_widget_real_query_tooltip;
klass->css_changed = gtk_widget_real_css_changed;
klass->system_setting_changed = gtk_widget_real_system_setting_changed;
klass->contains = gtk_widget_real_contains;
/**
* GtkWidget:name: (attributes org.gtk.Property.get=gtk_widget_get_name org.gtk.Property.set=gtk_widget_set_name)
*
* The name of the widget.
*/
widget_props[PROP_NAME] =
g_param_spec_string ("name", NULL, NULL,
NULL,
GTK_PARAM_READWRITE);
/**
* GtkWidget:parent: (attributes org.gtk.Property.get=gtk_widget_get_parent)
*
* The parent widget of this widget.
*/
widget_props[PROP_PARENT] =
g_param_spec_object ("parent", NULL, NULL,
GTK_TYPE_WIDGET,
GTK_PARAM_READABLE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:root: (attributes org.gtk.Property.get=gtk_widget_get_root)
*
* The `GtkRoot` widget of the widget tree containing this widget.
*
* This will be %NULL if the widget is not contained in a root widget.
*/
widget_props[PROP_ROOT] =
g_param_spec_object ("root", NULL, NULL,
GTK_TYPE_ROOT,
GTK_PARAM_READABLE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:width-request:
*
* Override for width request of the widget.
*
* If this is -1, the natural request will be used.
*/
widget_props[PROP_WIDTH_REQUEST] =
g_param_spec_int ("width-request", NULL, NULL,
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:height-request:
*
* Override for height request of the widget.
*
* If this is -1, the natural request will be used.
*/
widget_props[PROP_HEIGHT_REQUEST] =
g_param_spec_int ("height-request", NULL, NULL,
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:visible: (attributes org.gtk.Property.get=gtk_widget_get_visible org.gtk.Property.set=gtk_widget_set_visible)
*
* Whether the widget is visible.
*/
widget_props[PROP_VISIBLE] =
g_param_spec_boolean ("visible", NULL, NULL,
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:sensitive: (attributes org.gtk.Property.get=gtk_widget_get_sensitive org.gtk.Property.set=gtk_widget_set_sensitive)
*
* Whether the widget responds to input.
*/
widget_props[PROP_SENSITIVE] =
g_param_spec_boolean ("sensitive", NULL, NULL,
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:can-focus: (attributes org.gtk.Property.get=gtk_widget_get_can_focus org.gtk.Property.set=gtk_widget_set_can_focus)
*
* Whether the widget or any of its descendents can accept
* the input focus.
*
* This property is meant to be set by widget implementations,
* typically in their instance init function.
*/
widget_props[PROP_CAN_FOCUS] =
g_param_spec_boolean ("can-focus", NULL, NULL,
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:focusable: (attributes org.gtk.Property.get=gtk_widget_get_focusable org.gtk.Property.set=gtk_widget_set_focusable)
*
* Whether this widget itself will accept the input focus.
*/
widget_props[PROP_FOCUSABLE] =
g_param_spec_boolean ("focusable", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:has-focus: (attributes org.gtk.Property.get=gtk_widget_has_focus)
*
* Whether the widget has the input focus.
*/
widget_props[PROP_HAS_FOCUS] =
g_param_spec_boolean ("has-focus", NULL, NULL,
FALSE,
GTK_PARAM_READABLE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:can-target: (attributes org.gtk.Property.get=gtk_widget_get_can_target org.gtk.Property.set=gtk_widget_set_can_target)
*
* Whether the widget can receive pointer events.
*/
widget_props[PROP_CAN_TARGET] =
g_param_spec_boolean ("can-target", NULL, NULL,
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:focus-on-click: (attributes org.gtk.Property.get=gtk_widget_get_focus_on_click org.gtk.Property.set=gtk_widget_set_focus_on_click)
*
* Whether the widget should grab focus when it is clicked with the mouse.
*
* This property is only relevant for widgets that can take focus.
*/
widget_props[PROP_FOCUS_ON_CLICK] =
g_param_spec_boolean ("focus-on-click", NULL, NULL,
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:has-default: (attributes org.gtk.Property.get=gtk_widget_has_default)
*
* Whether the widget is the default widget.
*/
widget_props[PROP_HAS_DEFAULT] =
g_param_spec_boolean ("has-default", NULL, NULL,
FALSE,
GTK_PARAM_READABLE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:receives-default: (attributes org.gtk.Property.get=gtk_widget_get_receives_default org.gtk.Property.set=gtk_widget_set_receives_default)
*
* Whether the widget will receive the default action when it is focused.
*/
widget_props[PROP_RECEIVES_DEFAULT] =
g_param_spec_boolean ("receives-default", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:cursor: (attributes org.gtk.Property.get=gtk_widget_get_cursor org.gtk.Property.set=gtk_widget_set_cursor)
*
* The cursor used by @widget.
*/
widget_props[PROP_CURSOR] =
g_param_spec_object("cursor", NULL, NULL,
GDK_TYPE_CURSOR,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:has-tooltip: (attributes org.gtk.Property.get=gtk_widget_get_has_tooltip org.gtk.Property.set=gtk_widget_set_has_tooltip)
*
* Enables or disables the emission of the ::query-tooltip signal on @widget.
*
* A value of %TRUE indicates that @widget can have a tooltip, in this case
* the widget will be queried using [signal@Gtk.Widget::query-tooltip] to
* determine whether it will provide a tooltip or not.
*/
widget_props[PROP_HAS_TOOLTIP] =
g_param_spec_boolean ("has-tooltip", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:tooltip-text: (attributes org.gtk.Property.get=gtk_widget_get_tooltip_text org.gtk.Property.set=gtk_widget_set_tooltip_text)
*
* Sets the text of tooltip to be the given string.
*
* Also see [method@Gtk.Tooltip.set_text].
*
* This is a convenience property which will take care of getting the
* tooltip shown if the given string is not %NULL:
* [property@Gtk.Widget:has-tooltip] will automatically be set to %TRUE
* and there will be taken care of [signal@Gtk.Widget::query-tooltip] in
* the default signal handler.
*
* Note that if both [property@Gtk.Widget:tooltip-text] and
* [property@Gtk.Widget:tooltip-markup] are set, the last one wins.
*/
widget_props[PROP_TOOLTIP_TEXT] =
g_param_spec_string ("tooltip-text", NULL, NULL,
NULL,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:tooltip-markup: (attributes org.gtk.Property.get=gtk_widget_get_tooltip_markup org.gtk.Property.set=gtk_widget_set_tooltip_markup)
*
* Sets the text of tooltip to be the given string, which is marked up
* with Pango markup.
*
* Also see [method@Gtk.Tooltip.set_markup].
*
* This is a convenience property which will take care of getting the
* tooltip shown if the given string is not %NULL:
* [property@Gtk.Widget:has-tooltip] will automatically be set to %TRUE
* and there will be taken care of [signal@Gtk.Widget::query-tooltip] in
* the default signal handler.
*
* Note that if both [property@Gtk.Widget:tooltip-text] and
* [property@Gtk.Widget:tooltip-markup] are set, the last one wins.
*/
widget_props[PROP_TOOLTIP_MARKUP] =
g_param_spec_string ("tooltip-markup", NULL, NULL,
NULL,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:halign: (attributes org.gtk.Property.get=gtk_widget_get_halign org.gtk.Property.set=gtk_widget_set_halign)
*
* How to distribute horizontal space if widget gets extra space.
*/
widget_props[PROP_HALIGN] =
g_param_spec_enum ("halign", NULL, NULL,
GTK_TYPE_ALIGN,
GTK_ALIGN_FILL,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:valign: (attributes org.gtk.Property.get=gtk_widget_get_valign org.gtk.Property.set=gtk_widget_set_valign)
*
* How to distribute vertical space if widget gets extra space.
*/
widget_props[PROP_VALIGN] =
g_param_spec_enum ("valign", NULL, NULL,
GTK_TYPE_ALIGN,
GTK_ALIGN_FILL,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:margin-start: (attributes org.gtk.Property.get=gtk_widget_get_margin_start org.gtk.Property.set=gtk_widget_set_margin_start)
*
* Margin on start of widget, horizontally.
*
* This property supports left-to-right and right-to-left text
* directions.
*
* This property adds margin outside of the widget's normal size
* request, the margin will be added in addition to the size from
* [method@Gtk.Widget.set_size_request] for example.
*/
widget_props[PROP_MARGIN_START] =
g_param_spec_int ("margin-start", NULL, NULL,
0, G_MAXINT16,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:margin-end: (attributes org.gtk.Property.get=gtk_widget_get_margin_end org.gtk.Property.set=gtk_widget_set_margin_end)
*
* Margin on end of widget, horizontally.
*
* This property supports left-to-right and right-to-left text
* directions.
*
* This property adds margin outside of the widget's normal size
* request, the margin will be added in addition to the size from
* [method@Gtk.Widget.set_size_request] for example.
*/
widget_props[PROP_MARGIN_END] =
g_param_spec_int ("margin-end", NULL, NULL,
0, G_MAXINT16,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:margin-top: (attributes org.gtk.Property.get=gtk_widget_get_margin_top org.gtk.Property.set=gtk_widget_set_margin_top)
*
* Margin on top side of widget.
*
* This property adds margin outside of the widget's normal size
* request, the margin will be added in addition to the size from
* [method@Gtk.Widget.set_size_request] for example.
*/
widget_props[PROP_MARGIN_TOP] =
g_param_spec_int ("margin-top", NULL, NULL,
0, G_MAXINT16,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:margin-bottom: (attributes org.gtk.Property.get=gtk_widget_get_margin_bottom org.gtk.Property.set=gtk_widget_set_margin_bottom)
*
* Margin on bottom side of widget.
*
* This property adds margin outside of the widget's normal size
* request, the margin will be added in addition to the size from
* [method@Gtk.Widget.set_size_request] for example.
*/
widget_props[PROP_MARGIN_BOTTOM] =
g_param_spec_int ("margin-bottom", NULL, NULL,
0, G_MAXINT16,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:hexpand: (attributes org.gtk.Property.get=gtk_widget_get_hexpand org.gtk.Property.set=gtk_widget_set_hexpand)
*
* Whether to expand horizontally.
*/
widget_props[PROP_HEXPAND] =
g_param_spec_boolean ("hexpand", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:hexpand-set: (attributes org.gtk.Property.get=gtk_widget_get_hexpand_set org.gtk.Property.set=gtk_widget_set_hexpand_set)
*
* Whether to use the `hexpand` property.
*/
widget_props[PROP_HEXPAND_SET] =
g_param_spec_boolean ("hexpand-set", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:vexpand: (attributes org.gtk.Property.get=gtk_widget_get_vexpand org.gtk.Property.set=gtk_widget_set_vexpand)
*
* Whether to expand vertically.
*/
widget_props[PROP_VEXPAND] =
g_param_spec_boolean ("vexpand", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:vexpand-set: (attributes org.gtk.Property.get=gtk_widget_get_vexpand_set org.gtk.Property.set=gtk_widget_set_vexpand_set)
*
* Whether to use the `vexpand` property.
*/
widget_props[PROP_VEXPAND_SET] =
g_param_spec_boolean ("vexpand-set", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:opacity: (attributes org.gtk.Property.get=gtk_widget_get_opacity org.gtk.Widget.set=gtk_widget_set_opacity)
*
* The requested opacity of the widget.
*/
widget_props[PROP_OPACITY] =
g_param_spec_double ("opacity", NULL, NULL,
0.0, 1.0,
1.0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:overflow: (attributes org.gtk.Property.get=gtk_widget_get_overflow org.gtk.Property.set=gtk_widget_set_overflow)
*
* How content outside the widget's content area is treated.
*
* This property is meant to be set by widget implementations,
* typically in their instance init function.
*/
widget_props[PROP_OVERFLOW] =
g_param_spec_enum ("overflow", NULL, NULL,
GTK_TYPE_OVERFLOW,
GTK_OVERFLOW_VISIBLE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkWidget:scale-factor: (attributes org.gtk.Property.get=gtk_widget_get_scale_factor)
*
* The scale factor of the widget.
*/
widget_props[PROP_SCALE_FACTOR] =
g_param_spec_int ("scale-factor", NULL, NULL,
1, G_MAXINT,
1,
GTK_PARAM_READABLE);
/**
* GtkWidget:css-name: (attributes org.gtk.Property.get=gtk_widget_get_css_name)
*
* The name of this widget in the CSS tree.
*
* This property is meant to be set by widget implementations,
* typically in their instance init function.
*/
widget_props[PROP_CSS_NAME] =
g_param_spec_string ("css-name", NULL, NULL,
NULL,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
/**
* GtkWidget:css-classes: (attributes org.gtk.Property.get=gtk_widget_get_css_classes org.gtk.Property.set=gtk_widget_set_css_classes)
*
* A list of css classes applied to this widget.
*/
widget_props[PROP_CSS_CLASSES] =
g_param_spec_boxed ("css-classes", NULL, NULL,
G_TYPE_STRV,
GTK_PARAM_READWRITE);
/**
* GtkWidget:layout-manager: (attributes org.gtk.Property.get=gtk_widget_get_layout_manager org.gtk.Property.set=gtk_widget_set_layout_manager)
*
* The `GtkLayoutManager` instance to use to compute the preferred size
* of the widget, and allocate its children.
*
* This property is meant to be set by widget implementations,
* typically in their instance init function.
*/
widget_props[PROP_LAYOUT_MANAGER] =
g_param_spec_object ("layout-manager", NULL, NULL,
GTK_TYPE_LAYOUT_MANAGER,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, NUM_PROPERTIES, widget_props);
g_object_class_override_property (gobject_class, PROP_ACCESSIBLE_ROLE, "accessible-role");
/**
* GtkWidget::destroy:
* @object: the object which received the signal
*
* Signals that all holders of a reference to the widget should release
* the reference that they hold.
*
* May result in finalization of the widget if all references are released.
*
* This signal is not suitable for saving widget state.
*/
widget_signals[DESTROY] =
g_signal_new (I_("destroy"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
0,
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkWidget::show:
* @widget: the object which received the signal.
*
* Emitted when @widget is shown.
*/
widget_signals[SHOW] =
g_signal_new (I_("show"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, show),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkWidget::hide:
* @widget: the object which received the signal.
*
* Emitted when @widget is hidden.
*/
widget_signals[HIDE] =
g_signal_new (I_("hide"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, hide),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkWidget::map:
* @widget: the object which received the signal.
*
* Emitted when @widget is going to be mapped.
*
* A widget is mapped when the widget is visible (which is controlled with
* [property@Gtk.Widget:visible]) and all its parents up to the toplevel widget
* are also visible.
*
* The ::map signal can be used to determine whether a widget will be drawn,
* for instance it can resume an animation that was stopped during the
* emission of [signal@Gtk.Widget::unmap].
*/
widget_signals[MAP] =
g_signal_new (I_("map"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, map),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkWidget::unmap:
* @widget: the object which received the signal.
*
* Emitted when @widget is going to be unmapped.
*
* A widget is unmapped when either it or any of its parents up to the
* toplevel widget have been set as hidden.
*
* As ::unmap indicates that a widget will not be shown any longer,
* it can be used to, for example, stop an animation on the widget.
*/
widget_signals[UNMAP] =
g_signal_new (I_("unmap"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, unmap),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkWidget::realize:
* @widget: the object which received the signal.
*
* Emitted when @widget is associated with a `GdkSurface`.
*
* This means that [method@Gtk.Widget.realize] has been called
* or the widget has been mapped (that is, it is going to be drawn).
*/
widget_signals[REALIZE] =
g_signal_new (I_("realize"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, realize),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkWidget::unrealize:
* @widget: the object which received the signal.
*
* Emitted when the `GdkSurface` associated with @widget is destroyed.
*
* This means that [method@Gtk.Widget.unrealize] has been called
* or the widget has been unmapped (that is, it is going to be hidden).
*/
widget_signals[UNREALIZE] =
g_signal_new (I_("unrealize"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, unrealize),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkWidget::state-flags-changed:
* @widget: the object which received the signal.
* @flags: The previous state flags.
*
* Emitted when the widget state changes.
*
* See [method@Gtk.Widget.get_state_flags].
*/
widget_signals[STATE_FLAGS_CHANGED] =
g_signal_new (I_("state-flags-changed"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, state_flags_changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
GTK_TYPE_STATE_FLAGS);
/**
* GtkWidget::direction-changed:
* @widget: the object on which the signal is emitted
* @previous_direction: the previous text direction of @widget
*
* Emitted when the text direction of a widget changes.
*/
widget_signals[DIRECTION_CHANGED] =
g_signal_new (I_("direction-changed"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, direction_changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
GTK_TYPE_TEXT_DIRECTION);
/**
* GtkWidget::mnemonic-activate:
* @widget: the object which received the signal.
* @group_cycling: %TRUE if there are other widgets with the same mnemonic
*
* Emitted when a widget is activated via a mnemonic.
*
* The default handler for this signal activates @widget if @group_cycling
* is %FALSE, or just makes @widget grab focus if @group_cycling is %TRUE.
*
* Returns: %TRUE to stop other handlers from being invoked for the event.
* %FALSE to propagate the event further.
*/
widget_signals[MNEMONIC_ACTIVATE] =
g_signal_new (I_("mnemonic-activate"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, mnemonic_activate),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOOLEAN,
G_TYPE_BOOLEAN, 1,
G_TYPE_BOOLEAN);
g_signal_set_va_marshaller (widget_signals[MNEMONIC_ACTIVATE],
G_TYPE_FROM_CLASS (gobject_class),
_gtk_marshal_BOOLEAN__BOOLEANv);
/**
* GtkWidget::move-focus:
* @widget: the object which received the signal.
* @direction: the direction of the focus move
*
* Emitted when the focus is moved.
*
* The ::move-focus signal is a [keybinding signal](class.SignalAction.html).
*
* The default bindings for this signal are <kbd>Tab</kbd> to move forward,
* and <kbd>Shift</kbd>+<kbd>Tab</kbd> to move backward.
*/
widget_signals[MOVE_FOCUS] =
g_signal_new (I_("move-focus"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkWidgetClass, move_focus),
NULL, NULL,
NULL,
G_TYPE_NONE,
1,
GTK_TYPE_DIRECTION_TYPE);
/**
* GtkWidget::keynav-failed:
* @widget: the object which received the signal
* @direction: the direction of movement
*
* Emitted if keyboard navigation fails.
*
* See [method@Gtk.Widget.keynav_failed] for details.
*
* Returns: %TRUE if stopping keyboard navigation is fine, %FALSE
* if the emitting widget should try to handle the keyboard
* navigation attempt in its parent widget(s).
*/
widget_signals[KEYNAV_FAILED] =
g_signal_new (I_("keynav-failed"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, keynav_failed),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__ENUM,
G_TYPE_BOOLEAN, 1,
GTK_TYPE_DIRECTION_TYPE);
g_signal_set_va_marshaller (widget_signals[KEYNAV_FAILED],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_BOOLEAN__ENUMv);
/**
* GtkWidget::query-tooltip:
* @widget: the object which received the signal
* @x: the x coordinate of the cursor position where the request has
* been emitted, relative to @widget's left side
* @y: the y coordinate of the cursor position where the request has
* been emitted, relative to @widget's top
* @keyboard_mode: %TRUE if the tooltip was triggered using the keyboard
* @tooltip: a `GtkTooltip`
*
* Emitted when the widget’s tooltip is about to be shown.
*
* This happens when the [property@Gtk.Widget:has-tooltip] property
* is %TRUE and the hover timeout has expired with the cursor hovering
* "above" @widget; or emitted when @widget got focus in keyboard mode.
*
* Using the given coordinates, the signal handler should determine
* whether a tooltip should be shown for @widget. If this is the case
* %TRUE should be returned, %FALSE otherwise. Note that if
* @keyboard_mode is %TRUE, the values of @x and @y are undefined and
* should not be used.
*
* The signal handler is free to manipulate @tooltip with the therefore
* destined function calls.
*
* Returns: %TRUE if @tooltip should be shown right now, %FALSE otherwise.
*/
widget_signals[QUERY_TOOLTIP] =
g_signal_new (I_("query-tooltip"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, query_tooltip),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__INT_INT_BOOLEAN_OBJECT,
G_TYPE_BOOLEAN, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_BOOLEAN,
GTK_TYPE_TOOLTIP);
g_signal_set_va_marshaller (widget_signals[QUERY_TOOLTIP],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_BOOLEAN__INT_INT_BOOLEAN_OBJECTv);
gtk_widget_class_set_css_name (klass, I_("widget"));
klass->priv->accessible_role = GTK_ACCESSIBLE_ROLE_WIDGET;
}
static void
template_child_class_free (AutomaticChildClass *child_class)
{
if (child_class)
{
g_free (child_class->name);
g_free (child_class);
}
}
static void
gtk_widget_base_class_finalize (GtkWidgetClass *klass)
{
GtkWidgetTemplate *template_data = klass->priv->template;
if (template_data)
{
g_bytes_unref (template_data->data);
g_slist_free_full (template_data->children, (GDestroyNotify)template_child_class_free);
g_object_unref (template_data->scope);
g_free (template_data);
}
g_object_unref (klass->priv->shortcuts);
}
static void
_gtk_widget_emulate_press (GtkWidget *widget,
GdkEvent *event,
GtkWidget *event_widget)
{
GtkWidget *next_child, *parent;
GdkEvent *press;
double x, y;
graphene_point_t p;
if (event_widget == widget)
return;
switch ((guint) gdk_event_get_event_type (event))
{
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
case GDK_MOTION_NOTIFY:
gdk_event_get_position (event, &x, &y);
if (!gtk_widget_compute_point (event_widget,
GTK_WIDGET (gtk_widget_get_root (event_widget)),
&GRAPHENE_POINT_INIT (x, y),
&p))
return;
break;
default:
return;
}
switch ((guint) gdk_event_get_event_type (event))
{
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
press = gdk_touch_event_new (GDK_TOUCH_BEGIN,
gdk_event_get_event_sequence (event),
gdk_event_get_surface (event),
gdk_event_get_device (event),
gdk_event_get_time (event),
gdk_event_get_modifier_state (event),
p.x, p.y,
NULL,
gdk_touch_event_get_emulating_pointer (event));
break;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
press = gdk_button_event_new (GDK_BUTTON_PRESS,
gdk_event_get_surface (event),
gdk_event_get_device (event),
gdk_event_get_device_tool (event),
gdk_event_get_time (event),
gdk_event_get_modifier_state (event),
gdk_button_event_get_button (event),
p.x, p.y,
NULL);
break;
case GDK_MOTION_NOTIFY:
{
GdkModifierType state = gdk_event_get_modifier_state (event);
int button;
if (state & GDK_BUTTON3_MASK)
button = 3;
else if (state & GDK_BUTTON2_MASK)
button = 2;
else
{
if ((state & GDK_BUTTON1_MASK) == 0)
g_critical ("Guessing button number 1 on generated button press event");
button = 1;
}
press = gdk_button_event_new (GDK_BUTTON_PRESS,
gdk_event_get_surface (event),
gdk_event_get_device (event),
gdk_event_get_device_tool (event),
gdk_event_get_time (event),
gdk_event_get_modifier_state (event),
button,
p.x, p.y,
NULL);
}
break;
default:
g_assert_not_reached ();
}
next_child = event_widget;
parent = _gtk_widget_get_parent (next_child);
while (parent && parent != widget)
{
next_child = parent;
parent = _gtk_widget_get_parent (parent);
}
/* Perform propagation state starting from the next child in the chain */
gtk_propagate_event_internal (event_widget, press, next_child);
gdk_event_unref (press);
}
static GdkEvent *
_gtk_widget_get_last_event (GtkWidget *widget,
GdkEventSequence *sequence,
GtkWidget **target)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkEventController *controller;
GdkEvent *event;
GList *l;
for (l = priv->event_controllers; l; l = l->next)
{
controller = l->data;
if (!GTK_IS_GESTURE (controller))
continue;
event = gtk_gesture_get_last_event (GTK_GESTURE (controller), sequence);
if (event)
{
*target = gtk_gesture_get_last_target (GTK_GESTURE (controller), sequence);
return event;
}
}
*target = NULL;
return NULL;
}
static gboolean
_gtk_widget_get_emulating_sequence (GtkWidget *widget,
GdkEventSequence *sequence,
GdkEventSequence **sequence_out)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
*sequence_out = sequence;
if (sequence)
{
GdkEvent *last_event;
GtkWidget *target;
last_event = _gtk_widget_get_last_event (widget, sequence, &target);
if (last_event &&
(gdk_event_get_event_type (last_event) == GDK_TOUCH_BEGIN ||
gdk_event_get_event_type (last_event) == GDK_TOUCH_UPDATE ||
gdk_event_get_event_type (last_event) == GDK_TOUCH_END) &&
gdk_touch_event_get_emulating_pointer (last_event))
return TRUE;
}
else
{
GList *l;
/* For a NULL(pointer) sequence, find the pointer emulating one */
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller = l->data;
if (!GTK_IS_GESTURE (controller))
continue;
if (_gtk_gesture_get_pointer_emulating_sequence (GTK_GESTURE (controller),
sequence_out))
return TRUE;
}
}
return FALSE;
}
static gboolean
gtk_widget_needs_press_emulation (GtkWidget *widget,
GdkEventSequence *sequence)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
gboolean sequence_press_handled = FALSE;
GList *l;
/* Check whether there is any remaining gesture in
* the capture phase that handled the press event
*/
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller = l->data;
GtkPropagationPhase phase;
GtkGesture *gesture;
phase = gtk_event_controller_get_propagation_phase (controller);
if (phase != GTK_PHASE_CAPTURE)
continue;
if (!GTK_IS_GESTURE (controller))
continue;
gesture = GTK_GESTURE (controller);
sequence_press_handled |=
(gtk_gesture_handles_sequence (gesture, sequence) &&
_gtk_gesture_handled_sequence_press (gesture, sequence));
}
return !sequence_press_handled;
}
static int
_gtk_widget_set_sequence_state_internal (GtkWidget *widget,
GdkEventSequence *sequence,
GtkEventSequenceState state,
GtkGesture *emitter)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
gboolean emulates_pointer, sequence_handled = FALSE;
GdkEvent *mimic_event;
GtkWidget *target;
GList *group = NULL, *l;
GdkEventSequence *seq;
int n_handled = 0;
if (!priv->event_controllers && state != GTK_EVENT_SEQUENCE_CLAIMED)
return TRUE;
if (emitter)
group = gtk_gesture_get_group (emitter);
emulates_pointer = _gtk_widget_get_emulating_sequence (widget, sequence, &seq);
mimic_event = _gtk_widget_get_last_event (widget, seq, &target);
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller;
GtkEventSequenceState gesture_state;
GtkGesture *gesture;
gboolean retval;
seq = sequence;
controller = l->data;
gesture_state = state;
if (!GTK_IS_GESTURE (controller))
continue;
gesture = GTK_GESTURE (controller);
if (gesture == emitter)
{
sequence_handled |=
_gtk_gesture_handled_sequence_press (gesture, sequence);
n_handled++;
continue;
}
if (seq && emulates_pointer &&
!gtk_gesture_handles_sequence (gesture, seq))
seq = NULL;
if (group && !g_list_find (group, controller))
{
/* If a group is provided, ensure only gestures pertaining to the group
* get a "claimed" state, all other claiming gestures must deny the sequence.
*/
if (state == GTK_EVENT_SEQUENCE_CLAIMED)
gesture_state = GTK_EVENT_SEQUENCE_DENIED;
else
continue;
}
else if (!group &&
gtk_gesture_get_sequence_state (gesture, sequence) != GTK_EVENT_SEQUENCE_CLAIMED)
continue;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
retval = gtk_gesture_set_sequence_state (gesture, seq, gesture_state);
G_GNUC_END_IGNORE_DEPRECATIONS
if (retval || gesture == emitter)
{
sequence_handled |=
_gtk_gesture_handled_sequence_press (gesture, seq);
n_handled++;
}
}
/* If the sequence goes denied, check whether this is a controller attached
* to the capture phase, that additionally handled the button/touch press (i.e.
* it was consumed), the corresponding press will be emulated for widgets
* beneath, so the widgets beneath get a coherent stream of events from now on.
*/
if (n_handled > 0 && sequence_handled &&
state == GTK_EVENT_SEQUENCE_DENIED &&
gtk_widget_needs_press_emulation (widget, sequence))
_gtk_widget_emulate_press (widget, mimic_event, target);
g_list_free (group);
return n_handled;
}
static gboolean
_gtk_widget_cancel_sequence (GtkWidget *widget,
GdkEventSequence *sequence)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
gboolean handled = FALSE;
GList *l;
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller;
GtkGesture *gesture;
controller = l->data;
if (!GTK_IS_GESTURE (controller))
continue;
gesture = GTK_GESTURE (controller);
handled |= _gtk_gesture_cancel_sequence (gesture, sequence);
}
return handled;
}
static gboolean
gtk_widget_class_get_visible_by_default (GtkWidgetClass *widget_class)
{
return !g_type_is_a (G_TYPE_FROM_CLASS (widget_class), GTK_TYPE_NATIVE);
}
static void
gtk_widget_init (GTypeInstance *instance, gpointer g_class)
{
GtkWidget *widget = GTK_WIDGET (instance);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GType layout_manager_type;
GtkEventController *controller;
widget->priv = priv;
priv->visible = gtk_widget_class_get_visible_by_default (g_class);
priv->child_visible = TRUE;
priv->name = NULL;
priv->user_alpha = 255;
priv->parent = NULL;
priv->first_child = NULL;
priv->last_child = NULL;
priv->prev_sibling = NULL;
priv->next_sibling = NULL;
priv->baseline = -1;
priv->allocated_baseline = -1;
priv->sensitive = TRUE;
priv->alloc_needed = TRUE;
priv->alloc_needed_on_child = TRUE;
priv->draw_needed = TRUE;
priv->focus_on_click = TRUE;
priv->can_focus = TRUE;
priv->focusable = FALSE;
priv->can_target = TRUE;
switch (_gtk_widget_get_direction (widget))
{
case GTK_TEXT_DIR_LTR:
priv->state_flags = GTK_STATE_FLAG_DIR_LTR;
break;
case GTK_TEXT_DIR_RTL:
priv->state_flags = GTK_STATE_FLAG_DIR_RTL;
break;
case GTK_TEXT_DIR_NONE:
default:
g_assert_not_reached ();
break;
}
/* this will be set to TRUE if the widget gets a child or if the
* expand flag is set on the widget, but until one of those happen
* we know the expand is already properly FALSE.
*
* We really want to default FALSE here to avoid computing expand
* all over the place while initially building a widget tree.
*/
priv->need_compute_expand = FALSE;
priv->halign = GTK_ALIGN_FILL;
priv->valign = GTK_ALIGN_FILL;
/* Note that we intentionally set this to an abstract role here.
* See gtk_widget_get_accessible_role() for where it gets overridden
* with GTK_ACCESSIBLE_ROLE_GENERIC.
*/
priv->accessible_role = GTK_ACCESSIBLE_ROLE_WIDGET;
priv->width_request = -1;
priv->height_request = -1;
_gtk_size_request_cache_init (&priv->requests);
priv->cssnode = gtk_css_widget_node_new (widget);
gtk_css_node_set_state (priv->cssnode, priv->state_flags);
gtk_css_node_set_visible (priv->cssnode, priv->visible);
/* need to set correct name here, and only class has the correct type here */
gtk_css_node_set_name (priv->cssnode, GTK_WIDGET_CLASS (g_class)->priv->css_name);
if (g_type_is_a (G_TYPE_FROM_CLASS (g_class), GTK_TYPE_ROOT))
priv->root = (GtkRoot *) widget;
if (g_type_is_a (G_TYPE_FROM_CLASS (g_class), GTK_TYPE_SHORTCUT_MANAGER))
gtk_shortcut_manager_create_controllers (widget);
layout_manager_type = gtk_widget_class_get_layout_manager_type (g_class);
if (layout_manager_type != G_TYPE_INVALID)
gtk_widget_set_layout_manager (widget, g_object_new (layout_manager_type, NULL));
if (g_list_model_get_n_items (G_LIST_MODEL (GTK_WIDGET_CLASS (g_class)->priv->shortcuts)) > 0)
{
controller = gtk_shortcut_controller_new_for_model (G_LIST_MODEL (GTK_WIDGET_CLASS (g_class)->priv->shortcuts));
gtk_event_controller_set_static_name (controller, "gtk-widget-class-shortcuts");
gtk_widget_add_controller (widget, controller);
}
priv->at_context = create_at_context (widget);
gtk_accessible_update_state (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_STATE_HIDDEN, TRUE,
-1);
}
static void
gtk_widget_root_at_context (GtkWidget *self)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
GtkAccessibleRole role = priv->accessible_role;
if (priv->at_context == NULL)
return;
/* Reset the accessible role to its current value */
if (role == GTK_ACCESSIBLE_ROLE_WIDGET)
role = GTK_WIDGET_GET_CLASS (self)->priv->accessible_role;
if (role == GTK_ACCESSIBLE_ROLE_WIDGET)
role = GTK_ACCESSIBLE_ROLE_GENERIC;
gtk_at_context_set_accessible_role (priv->at_context, role);
if (priv->root)
gtk_at_context_set_display (priv->at_context, gtk_root_get_display (priv->root));
}
static void
gtk_widget_unroot_at_context (GtkWidget *self)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
if (priv->at_context != NULL)
{
gtk_at_context_set_display (priv->at_context, gdk_display_get_default ());
gtk_at_context_unrealize (priv->at_context);
}
}
void
gtk_widget_realize_at_context (GtkWidget *self)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
if (priv->at_context == NULL || gtk_at_context_is_realized (priv->at_context))
return;
gtk_widget_root_at_context (self);
gtk_at_context_realize (priv->at_context);
}
void
gtk_widget_unrealize_at_context (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->at_context != NULL)
{
gtk_at_context_set_display (priv->at_context, gdk_display_get_default ());
gtk_at_context_unrealize (priv->at_context);
}
}
void
gtk_widget_root (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_assert (!priv->realized);
if (GTK_IS_ROOT (widget))
{
g_assert (priv->root == GTK_ROOT (widget));
}
else
{
g_assert (priv->root == NULL);
priv->root = priv->parent->priv->root;
}
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (priv->context)
gtk_style_context_set_display (priv->context, gtk_root_get_display (priv->root));
G_GNUC_END_IGNORE_DEPRECATIONS
if (priv->surface_transform_data)
add_parent_surface_transform_changed_listener (widget);
_gtk_widget_update_parent_muxer (widget);
if (priv->layout_manager)
gtk_layout_manager_set_root (priv->layout_manager, priv->root);
gtk_widget_root_at_context (widget);
GTK_WIDGET_GET_CLASS (widget)->root (widget);
if (!GTK_IS_ROOT (widget))
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_ROOT]);
}
void
gtk_widget_unroot (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidgetSurfaceTransformData *surface_transform_data;
g_assert (priv->root);
g_assert (!priv->realized);
surface_transform_data = priv->surface_transform_data;
if (surface_transform_data &&
surface_transform_data->tracked_parent)
remove_parent_surface_transform_changed_listener (widget);
_gtk_widget_update_parent_muxer (widget);
GTK_WIDGET_GET_CLASS (widget)->unroot (widget);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (priv->context)
gtk_style_context_set_display (priv->context, gdk_display_get_default ());
G_GNUC_END_IGNORE_DEPRECATIONS
if (priv->layout_manager)
gtk_layout_manager_set_root (priv->layout_manager, NULL);
if (g_object_get_qdata (G_OBJECT (widget), quark_pango_context))
g_object_set_qdata (G_OBJECT (widget), quark_pango_context, NULL);
_gtk_tooltip_hide (widget);
if (!GTK_IS_ROOT (widget))
{
/* Roots unrealize the ATContext on unmap */
gtk_widget_unroot_at_context (widget);
priv->root = NULL;
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_ROOT]);
}
}
/**
* gtk_widget_unparent:
* @widget: a `GtkWidget`
*
* Dissociate @widget from its parent.
*
* This function is only for use in widget implementations,
* typically in dispose.
*/
void
gtk_widget_unparent (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidget *old_parent;
GtkWidget *old_prev_sibling;
GtkRoot *root;
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->parent == NULL)
return;
gtk_widget_push_verify_invariants (widget);
g_object_freeze_notify (G_OBJECT (widget));
gtk_accessible_update_children (GTK_ACCESSIBLE (priv->parent),
GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_CHILD_STATE_REMOVED);
root = _gtk_widget_get_root (widget);
if (GTK_IS_WINDOW (root))
_gtk_window_unset_focus_and_default (GTK_WINDOW (root), widget);
if (gtk_widget_get_focus_child (priv->parent) == widget)
gtk_widget_set_focus_child (priv->parent, NULL);
if (_gtk_widget_get_mapped (priv->parent))
gtk_widget_queue_draw (priv->parent);
if (priv->visible && _gtk_widget_get_visible (priv->parent))
gtk_widget_queue_resize (priv->parent);
/* Reset the width and height here, to force reallocation if we
* get added back to a new parent.
*/
priv->width = 0;
priv->height = 0;
if (_gtk_widget_get_realized (widget))
gtk_widget_unrealize (widget);
if (priv->root)
gtk_widget_unroot (widget);
root = NULL;
/* Removing a widget from a container restores the child visible
* flag to the default state, so it doesn't affect the child
* in the next parent.
*/
priv->child_visible = TRUE;
old_parent = priv->parent;
if (old_parent)
{
if (old_parent->priv->first_child == widget)
old_parent->priv->first_child = priv->next_sibling;
if (old_parent->priv->last_child == widget)
old_parent->priv->last_child = priv->prev_sibling;
if (priv->prev_sibling)
priv->prev_sibling->priv->next_sibling = priv->next_sibling;
if (priv->next_sibling)
priv->next_sibling->priv->prev_sibling = priv->prev_sibling;
}
old_prev_sibling = priv->prev_sibling;
priv->parent = NULL;
priv->prev_sibling = NULL;
priv->next_sibling = NULL;
/* parent may no longer expand if the removed
* child was expand=TRUE and could therefore
* be forcing it to.
*/
if (_gtk_widget_get_visible (widget) &&
(priv->need_compute_expand ||
priv->computed_hexpand ||
priv->computed_vexpand))
{
gtk_widget_queue_compute_expand (old_parent);
}
/* Unset BACKDROP since we are no longer inside a toplevel window */
gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_BACKDROP);
gtk_css_node_set_parent (priv->cssnode, NULL);
_gtk_widget_update_parent_muxer (widget);
if (old_parent->priv->children_observer)
gtk_list_list_model_item_removed (old_parent->priv->children_observer, old_prev_sibling);
if (old_parent->priv->layout_manager)
gtk_layout_manager_remove_layout_child (old_parent->priv->layout_manager, widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_PARENT]);
g_object_thaw_notify (G_OBJECT (widget));
gtk_widget_pop_verify_invariants (widget);
g_object_unref (widget);
}
static void
gtk_widget_update_paintables (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GSList *l;
for (l = priv->paintables; l; l = l->next)
gtk_widget_paintable_update_image (l->data);
}
static void
gtk_widget_push_paintables (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GSList *l;
for (l = priv->paintables; l; l = l->next)
gtk_widget_paintable_push_snapshot_count (l->data);
}
static void
gtk_widget_pop_paintables (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GSList *l;
for (l = priv->paintables; l; l = l->next)
gtk_widget_paintable_pop_snapshot_count (l->data);
}
/**
* gtk_widget_show:
* @widget: a `GtkWidget`
*
* Flags a widget to be displayed.
*
* Any widget that isn’t shown will not appear on the screen.
*
* Remember that you have to show the containers containing a widget,
* in addition to the widget itself, before it will appear onscreen.
*
* When a toplevel container is shown, it is immediately realized and
* mapped; other shown widgets are realized and mapped when their
* toplevel container is realized and mapped.
*
* Deprecated: 4.10: Use [method@Gtk.Widget.set_visible] instead
*/
void
gtk_widget_show (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (!_gtk_widget_get_visible (widget))
{
GtkWidget *parent;
g_object_ref (widget);
gtk_widget_push_verify_invariants (widget);
parent = _gtk_widget_get_parent (widget);
if (parent)
{
gtk_widget_queue_resize (parent);
/* see comment in set_parent() for why this should and can be
* conditional
*/
if (priv->need_compute_expand ||
priv->computed_hexpand ||
priv->computed_vexpand)
gtk_widget_queue_compute_expand (parent);
}
gtk_css_node_set_visible (priv->cssnode, TRUE);
g_signal_emit (widget, widget_signals[SHOW], 0);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_VISIBLE]);
gtk_widget_pop_verify_invariants (widget);
g_object_unref (widget);
}
}
static void
gtk_widget_real_show (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (!_gtk_widget_get_visible (widget));
priv->visible = TRUE;
if (priv->parent &&
_gtk_widget_get_mapped (priv->parent) &&
_gtk_widget_get_child_visible (widget) &&
!_gtk_widget_get_mapped (widget))
gtk_widget_map (widget);
}
/**
* gtk_widget_hide:
* @widget: a `GtkWidget`
*
* Reverses the effects of gtk_widget_show().
*
* This is causing the widget to be hidden (invisible to the user).
*
* Deprecated: 4.10: Use [method@Gtk.Widget.set_visible] instead
*/
void
gtk_widget_hide (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (_gtk_widget_get_visible (widget))
{
GtkWidget *parent;
GtkRoot *root;
g_object_ref (widget);
gtk_widget_push_verify_invariants (widget);
root = _gtk_widget_get_root (widget);
if (GTK_WIDGET (root) != widget && GTK_IS_WINDOW (root))
_gtk_window_unset_focus_and_default (GTK_WINDOW (root), widget);
/* a parent may now be expand=FALSE since we're hidden. */
if (priv->need_compute_expand ||
priv->computed_hexpand ||
priv->computed_vexpand)
{
gtk_widget_queue_compute_expand (widget);
}
gtk_css_node_set_visible (priv->cssnode, FALSE);
g_signal_emit (widget, widget_signals[HIDE], 0);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_VISIBLE]);
parent = gtk_widget_get_parent (widget);
if (parent)
gtk_widget_queue_resize (parent);
gtk_widget_queue_allocate (widget);
gtk_widget_pop_verify_invariants (widget);
g_object_unref (widget);
}
}
static void
gtk_widget_real_hide (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (_gtk_widget_get_visible (widget));
priv->visible = FALSE;
if (_gtk_widget_get_mapped (widget))
gtk_widget_unmap (widget);
g_clear_pointer (&priv->allocated_transform, gsk_transform_unref);
priv->allocated_width = 0;
priv->allocated_height = 0;
priv->allocated_baseline = 0;
g_clear_pointer (&priv->transform, gsk_transform_unref);
priv->width = 0;
priv->height = 0;
priv->baseline = 0;
gtk_widget_update_paintables (widget);
}
static void
update_cursor_on_state_change (GtkWidget *widget)
{
GtkRoot *root;
root = _gtk_widget_get_root (widget);
if (GTK_IS_WINDOW (root))
gtk_window_update_pointer_focus_on_state_change (GTK_WINDOW (root), widget);
}
/**
* gtk_widget_map:
* @widget: a `GtkWidget`
*
* Causes a widget to be mapped if it isn’t already.
*
* This function is only for use in widget implementations.
*/
void
gtk_widget_map (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (_gtk_widget_get_visible (widget));
g_return_if_fail (_gtk_widget_get_child_visible (widget));
if (!_gtk_widget_get_mapped (widget))
{
gtk_widget_push_verify_invariants (widget);
if (!_gtk_widget_get_realized (widget))
gtk_widget_realize (widget);
g_signal_emit (widget, widget_signals[MAP], 0);
update_cursor_on_state_change (widget);
gtk_widget_queue_draw (widget);
gtk_accessible_update_state (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_STATE_HIDDEN, FALSE,
-1);
gtk_widget_pop_verify_invariants (widget);
}
}
/**
* gtk_widget_unmap:
* @widget: a `GtkWidget`
*
* Causes a widget to be unmapped if it’s currently mapped.
*
* This function is only for use in widget implementations.
*/
void
gtk_widget_unmap (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (_gtk_widget_get_mapped (widget))
{
g_object_ref (widget);
gtk_widget_push_verify_invariants (widget);
gtk_widget_queue_draw (widget);
_gtk_tooltip_hide (widget);
g_signal_emit (widget, widget_signals[UNMAP], 0);
update_cursor_on_state_change (widget);
gtk_accessible_update_state (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_STATE_HIDDEN, TRUE,
-1);
gtk_widget_pop_verify_invariants (widget);
g_object_unref (widget);
}
}
typedef struct _GtkTickCallbackInfo GtkTickCallbackInfo;
struct _GtkTickCallbackInfo
{
guint refcount;
guint id;
GtkTickCallback callback;
gpointer user_data;
GDestroyNotify notify;
guint destroyed : 1;
};
static void
ref_tick_callback_info (GtkTickCallbackInfo *info)
{
info->refcount++;
}
static void
unref_tick_callback_info (GtkWidget *widget,
GtkTickCallbackInfo *info,
GList *link)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
info->refcount--;
if (info->refcount == 0)
{
priv->tick_callbacks = g_list_delete_link (priv->tick_callbacks, link);
if (info->notify)
info->notify (info->user_data);
g_free (info);
}
if (priv->tick_callbacks == NULL && priv->clock_tick_id)
{
GdkFrameClock *frame_clock = gtk_widget_get_frame_clock (widget);
g_signal_handler_disconnect (frame_clock, priv->clock_tick_id);
priv->clock_tick_id = 0;
gdk_frame_clock_end_updating (frame_clock);
}
}
static void
destroy_tick_callback_info (GtkWidget *widget,
GtkTickCallbackInfo *info,
GList *link)
{
if (!info->destroyed)
{
info->destroyed = TRUE;
unref_tick_callback_info (widget, info, link);
}
}
static void
destroy_tick_callbacks (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
for (l = priv->tick_callbacks; l;)
{
GList *next = l->next;
destroy_tick_callback_info (widget, l->data, l);
l = next;
}
}
static void
gtk_widget_on_frame_clock_update (GdkFrameClock *frame_clock,
GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
g_object_ref (widget);
for (l = priv->tick_callbacks; l;)
{
GtkTickCallbackInfo *info = l->data;
GList *next;
ref_tick_callback_info (info);
if (!info->destroyed)
{
if (info->callback (widget,
frame_clock,
info->user_data) == G_SOURCE_REMOVE)
{
destroy_tick_callback_info (widget, info, l);
}
}
next = l->next;
unref_tick_callback_info (widget, info, l);
l = next;
}
g_object_unref (widget);
}
static guint tick_callback_id;
/**
* gtk_widget_add_tick_callback:
* @widget: a `GtkWidget`
* @callback: function to call for updating animations
* @user_data: (closure): data to pass to @callback
* @notify: function to call to free @user_data when the callback is removed.
*
* Queues an animation frame update and adds a callback to be called
* before each frame.
*
* Until the tick callback is removed, it will be called frequently
* (usually at the frame rate of the output device or as quickly as
* the application can be repainted, whichever is slower). For this
* reason, is most suitable for handling graphics that change every
* frame or every few frames. The tick callback does not automatically
* imply a relayout or repaint. If you want a repaint or relayout, and
* aren’t changing widget properties that would trigger that (for example,
* changing the text of a `GtkLabel`), then you will have to call
* [method@Gtk.Widget.queue_resize] or [method@Gtk.Widget.queue_draw]
* yourself.
*
* [method@Gdk.FrameClock.get_frame_time] should generally be used
* for timing continuous animations and
* [method@Gdk.FrameTimings.get_predicted_presentation_time] if you are
* trying to display isolated frames at particular times.
*
* This is a more convenient alternative to connecting directly to the
* [signal@Gdk.FrameClock::update] signal of `GdkFrameClock`, since you
* don't have to worry about when a `GdkFrameClock` is assigned to a widget.
*
* Returns: an id for the connection of this callback. Remove the callback
* by passing the id returned from this function to
* [method@Gtk.Widget.remove_tick_callback]
*/
guint
gtk_widget_add_tick_callback (GtkWidget *widget,
GtkTickCallback callback,
gpointer user_data,
GDestroyNotify notify)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkTickCallbackInfo *info;
GdkFrameClock *frame_clock;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
if (priv->realized && !priv->clock_tick_id)
{
frame_clock = gtk_widget_get_frame_clock (widget);
if (frame_clock)
{
priv->clock_tick_id = g_signal_connect (frame_clock, "update",
G_CALLBACK (gtk_widget_on_frame_clock_update),
widget);
gdk_frame_clock_begin_updating (frame_clock);
}
}
info = g_new0 (GtkTickCallbackInfo, 1);
info->refcount = 1;
info->id = ++tick_callback_id;
info->callback = callback;
info->user_data = user_data;
info->notify = notify;
priv->tick_callbacks = g_list_prepend (priv->tick_callbacks,
info);
return info->id;
}
/**
* gtk_widget_remove_tick_callback:
* @widget: a `GtkWidget`
* @id: an id returned by [method@Gtk.Widget.add_tick_callback]
*
* Removes a tick callback previously registered with
* gtk_widget_add_tick_callback().
*/
void
gtk_widget_remove_tick_callback (GtkWidget *widget,
guint id)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
g_return_if_fail (GTK_IS_WIDGET (widget));
for (l = priv->tick_callbacks; l; l = l->next)
{
GtkTickCallbackInfo *info = l->data;
if (info->id == id)
{
destroy_tick_callback_info (widget, info, l);
return;
}
}
}
gboolean
gtk_widget_has_tick_callback (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
return priv->tick_callbacks != NULL;
}
typedef struct _GtkSurfaceTransformChangedCallbackInfo GtkSurfaceTransformChangedCallbackInfo;
struct _GtkSurfaceTransformChangedCallbackInfo
{
guint id;
GtkSurfaceTransformChangedCallback callback;
gpointer user_data;
GDestroyNotify notify;
};
static void
surface_transform_changed_callback_info_destroy (GtkSurfaceTransformChangedCallbackInfo *info)
{
if (info->notify)
info->notify (info->user_data);
g_free (info);
}
static void
notify_surface_transform_changed (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidgetSurfaceTransformData *surface_transform_data =
priv->surface_transform_data;
graphene_matrix_t *surface_transform;
GList *l;
if (surface_transform_data->cached_surface_transform_valid)
surface_transform = &surface_transform_data->cached_surface_transform;
else
surface_transform = NULL;
for (l = surface_transform_data->callbacks; l;)
{
GtkSurfaceTransformChangedCallbackInfo *info = l->data;
GList *l_next = l->next;
if (info->callback (widget,
surface_transform,
info->user_data) == G_SOURCE_REMOVE)
{
surface_transform_data->callbacks =
g_list_delete_link (surface_transform_data->callbacks, l);
surface_transform_changed_callback_info_destroy (info);
}
l = l_next;
}
}
static void
destroy_surface_transform_data (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidgetSurfaceTransformData *surface_transform_data;
surface_transform_data = priv->surface_transform_data;
if (!surface_transform_data)
return;
g_list_free_full (surface_transform_data->callbacks,
(GDestroyNotify) surface_transform_changed_callback_info_destroy);
g_free (surface_transform_data);
priv->surface_transform_data = NULL;
}
static void
sync_widget_surface_transform (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidgetSurfaceTransformData *surface_transform_data =
priv->surface_transform_data;
gboolean was_valid;
graphene_matrix_t prev_transform;
was_valid = surface_transform_data->cached_surface_transform_valid;
prev_transform = surface_transform_data->cached_surface_transform;
if (GTK_IS_NATIVE (widget))
{
gsk_transform_to_matrix (priv->transform,
&surface_transform_data->cached_surface_transform);
surface_transform_data->cached_surface_transform_valid = TRUE;
}
else if (!priv->root)
{
surface_transform_data->cached_surface_transform_valid = FALSE;
}
else
{
GtkWidget *native = GTK_WIDGET (gtk_widget_get_native (widget));
if (gtk_widget_compute_transform (widget, native,
&surface_transform_data->cached_surface_transform))
{
surface_transform_data->cached_surface_transform_valid = TRUE;
}
else
{
g_warning ("Could not compute surface transform");
surface_transform_data->cached_surface_transform_valid = FALSE;
}
}
if (was_valid != surface_transform_data->cached_surface_transform_valid ||
(was_valid && surface_transform_data->cached_surface_transform_valid &&
!graphene_matrix_equal (&surface_transform_data->cached_surface_transform,
&prev_transform)))
notify_surface_transform_changed (widget);
}
static guint surface_transform_changed_callback_id;
static gboolean
parent_surface_transform_changed_cb (GtkWidget *parent,
const graphene_matrix_t *transform,
gpointer user_data)
{
GtkWidget *widget = GTK_WIDGET (user_data);
sync_widget_surface_transform (widget);
return G_SOURCE_CONTINUE;
}
static void
remove_parent_surface_transform_changed_listener (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidgetSurfaceTransformData *surface_transform_data =
priv->surface_transform_data;
g_assert (surface_transform_data->tracked_parent);
gtk_widget_remove_surface_transform_changed_callback (
surface_transform_data->tracked_parent,
surface_transform_data->parent_surface_transform_changed_id);
surface_transform_data->parent_surface_transform_changed_id = 0;
g_clear_object (&surface_transform_data->tracked_parent);
}
static void
add_parent_surface_transform_changed_listener (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidgetSurfaceTransformData *surface_transform_data =
priv->surface_transform_data;
GtkWidget *parent;
g_assert (!surface_transform_data->tracked_parent);
parent = priv->parent;
surface_transform_data->parent_surface_transform_changed_id =
gtk_widget_add_surface_transform_changed_callback (
parent,
parent_surface_transform_changed_cb,
widget,
NULL);
surface_transform_data->tracked_parent = g_object_ref (parent);
}
static GtkWidgetSurfaceTransformData *
ensure_surface_transform_data (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!priv->surface_transform_data)
priv->surface_transform_data = g_new0 (GtkWidgetSurfaceTransformData, 1);
return priv->surface_transform_data;
}
/**
* gtk_widget_add_surface_transform_changed_callback:
* @widget: a `GtkWidget`
* @callback: a function to call when the surface transform changes
* @user_data: (closure): data to pass to @callback
* @notify: function to call to free @user_data when the callback is removed
*
* Invokes the callback whenever the surface relative transform of
* the widget changes.
*
* Returns: an id for the connection of this callback. Remove the
* callback by passing the id returned from this function to
* [method@Gtk.Widget.remove_surface_transform_changed_callback]
*/
guint
gtk_widget_add_surface_transform_changed_callback (GtkWidget *widget,
GtkSurfaceTransformChangedCallback callback,
gpointer user_data,
GDestroyNotify notify)
{
GtkWidgetPrivate *priv;
GtkWidgetSurfaceTransformData *surface_transform_data;
GtkSurfaceTransformChangedCallbackInfo *info;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
g_return_val_if_fail (callback, 0);
priv = gtk_widget_get_instance_private (widget);
surface_transform_data = ensure_surface_transform_data (widget);
if (priv->parent &&
!surface_transform_data->parent_surface_transform_changed_id)
add_parent_surface_transform_changed_listener (widget);
if (!surface_transform_data->callbacks)
sync_widget_surface_transform (widget);
info = g_new0 (GtkSurfaceTransformChangedCallbackInfo, 1);
info->id = ++surface_transform_changed_callback_id;
info->callback = callback;
info->user_data = user_data;
info->notify = notify;
surface_transform_data->callbacks =
g_list_prepend (surface_transform_data->callbacks, info);
return info->id;
}
/**
* gtk_widget_remove_surface_transform_changed_callback:
* @widget: a `GtkWidget`
* @id: an id returned by [method@Gtk.Widget.add_surface_transform_changed_callback]
*
* Removes a surface transform changed callback previously registered with
* gtk_widget_add_surface_transform_changed_callback().
*/
void
gtk_widget_remove_surface_transform_changed_callback (GtkWidget *widget,
guint id)
{
GtkWidgetPrivate *priv;
GtkWidgetSurfaceTransformData *surface_transform_data;
GList *l;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (id);
priv = gtk_widget_get_instance_private (widget);
surface_transform_data = priv->surface_transform_data;
g_return_if_fail (surface_transform_data);
for (l = surface_transform_data->callbacks; l; l = l->next)
{
GtkSurfaceTransformChangedCallbackInfo *info = l->data;
if (info->id == id)
{
surface_transform_data->callbacks =
g_list_delete_link (surface_transform_data->callbacks, l);
surface_transform_changed_callback_info_destroy (info);
break;
}
}
if (!surface_transform_data->callbacks)
{
if (surface_transform_data->tracked_parent)
remove_parent_surface_transform_changed_listener (widget);
g_free (surface_transform_data);
priv->surface_transform_data = NULL;
}
}
GdkSurface *
gtk_widget_get_surface (GtkWidget *widget)
{
GtkNative *native = gtk_widget_get_native (widget);
if (native)
return gtk_native_get_surface (native);
return NULL;
}
/**
* gtk_widget_realize:
* @widget: a `GtkWidget`
*
* Creates the GDK resources associated with a widget.
*
* Normally realization happens implicitly; if you show a widget
* and all its parent containers, then the widget will be realized
* and mapped automatically.
*
* Realizing a widget requires all the widget’s parent widgets to be
* realized; calling this function realizes the widget’s parents
* in addition to @widget itself. If a widget is not yet inside a
* toplevel window when you realize it, bad things will happen.
*
* This function is primarily used in widget implementations, and
* isn’t very useful otherwise. Many times when you think you might
* need it, a better approach is to connect to a signal that will be
* called after the widget is realized automatically, such as
* [signal@Gtk.Widget::realize].
*/
void
gtk_widget_realize (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->realized)
return;
gtk_widget_push_verify_invariants (widget);
/*
if (GTK_IS_CONTAINER (widget) && _gtk_widget_get_has_surface (widget))
g_message ("gtk_widget_realize(%s)", G_OBJECT_TYPE_NAME (widget));
*/
if (priv->parent == NULL && !GTK_IS_ROOT (widget))
g_warning ("Calling gtk_widget_realize() on a widget that isn't "
"inside a toplevel window is not going to work very well. "
"Widgets must be inside a toplevel container before realizing them.");
if (priv->parent && !_gtk_widget_get_realized (priv->parent))
gtk_widget_realize (priv->parent);
g_signal_emit (widget, widget_signals[REALIZE], 0);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (priv->context)
gtk_style_context_set_scale (priv->context, gtk_widget_get_scale_factor (widget));
else
gtk_widget_get_style_context (widget);
G_GNUC_END_IGNORE_DEPRECATIONS
gtk_widget_pop_verify_invariants (widget);
}
/**
* gtk_widget_unrealize:
* @widget: a `GtkWidget`
*
* Causes a widget to be unrealized (frees all GDK resources
* associated with the widget).
*
* This function is only useful in widget implementations.
*/
void
gtk_widget_unrealize (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_object_ref (widget);
gtk_widget_push_verify_invariants (widget);
if (_gtk_widget_get_realized (widget))
{
if (priv->mapped)
gtk_widget_unmap (widget);
g_signal_emit (widget, widget_signals[UNREALIZE], 0);
g_assert (!priv->mapped);
g_assert (!priv->realized);
}
gtk_widget_pop_verify_invariants (widget);
g_object_unref (widget);
}
/**
* gtk_widget_queue_draw:
* @widget: a `GtkWidget`
*
* Schedules this widget to be redrawn in the paint phase
* of the current or the next frame.
*
* This means @widget's [vfunc@Gtk.Widget.snapshot]
* implementation will be called.
*/
void
gtk_widget_queue_draw (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
/* Just return if the widget isn't mapped */
if (!_gtk_widget_get_mapped (widget))
return;
for (; widget; widget = _gtk_widget_get_parent (widget))
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->draw_needed)
break;
priv->draw_needed = TRUE;
g_clear_pointer (&priv->render_node, gsk_render_node_unref);
if (GTK_IS_NATIVE (widget) && _gtk_widget_get_realized (widget))
gdk_surface_queue_render (gtk_native_get_surface (GTK_NATIVE (widget)));
}
}
static void
gtk_widget_set_alloc_needed (GtkWidget *widget);
/**
* gtk_widget_queue_allocate:
* @widget: a `GtkWidget`
*
* Flags the widget for a rerun of the [vfunc@Gtk.Widget.size_allocate]
* function.
*
* Use this function instead of [method@Gtk.Widget.queue_resize]
* when the @widget's size request didn't change but it wants to
* reposition its contents.
*
* An example user of this function is [method@Gtk.Widget.set_halign].
*
* This function is only for use in widget implementations.
*/
void
gtk_widget_queue_allocate (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (_gtk_widget_get_realized (widget))
gtk_widget_queue_draw (widget);
gtk_widget_set_alloc_needed (widget);
}
static inline gboolean
gtk_widget_get_resize_needed (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
return priv->resize_needed;
}
/*
* gtk_widget_queue_resize_internal:
* @widget: a `GtkWidget`
*
* Queue a resize on a widget, and on all other widgets
* grouped with this widget.
*/
static void
gtk_widget_queue_resize_internal (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GSList *groups, *l, *widgets;
if (gtk_widget_get_resize_needed (widget))
return;
priv->resize_needed = TRUE;
_gtk_size_request_cache_clear (&priv->requests);
gtk_widget_set_alloc_needed (widget);
if (priv->resize_func)
priv->resize_func (widget);
groups = _gtk_widget_get_sizegroups (widget);
for (l = groups; l; l = l->next)
{
for (widgets = gtk_size_group_get_widgets (l->data); widgets; widgets = widgets->next)
gtk_widget_queue_resize_internal (widgets->data);
}
if (_gtk_widget_get_visible (widget))
{
GtkWidget *parent = _gtk_widget_get_parent (widget);
if (parent)
{
if (GTK_IS_NATIVE (widget))
gtk_widget_queue_allocate (parent);
else
gtk_widget_queue_resize_internal (parent);
}
}
}
/**
* gtk_widget_queue_resize:
* @widget: a `GtkWidget`
*
* Flags a widget to have its size renegotiated.
*
* This should be called when a widget for some reason has a new
* size request. For example, when you change the text in a
* [class@Gtk.Label], the label queues a resize to ensure there’s
* enough space for the new text.
*
* Note that you cannot call gtk_widget_queue_resize() on a widget
* from inside its implementation of the [vfunc@Gtk.Widget.size_allocate]
* virtual method. Calls to gtk_widget_queue_resize() from inside
* [vfunc@Gtk.Widget.size_allocate] will be silently ignored.
*
* This function is only for use in widget implementations.
*/
void
gtk_widget_queue_resize (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (_gtk_widget_get_realized (widget))
gtk_widget_queue_draw (widget);
gtk_widget_queue_resize_internal (widget);
}
/**
* gtk_widget_get_frame_clock:
* @widget: a `GtkWidget`
*
* Obtains the frame clock for a widget.
*
* The frame clock is a global “ticker” that can be used to drive
* animations and repaints. The most common reason to get the frame
* clock is to call [method@Gdk.FrameClock.get_frame_time], in order
* to get a time to use for animating. For example you might record
* the start of the animation with an initial value from
* [method@Gdk.FrameClock.get_frame_time], and then update the animation
* by calling [method@Gdk.FrameClock.get_frame_time] again during each repaint.
*
* [method@Gdk.FrameClock.request_phase] will result in a new frame on the
* clock, but won’t necessarily repaint any widgets. To repaint a
* widget, you have to use [method@Gtk.Widget.queue_draw] which invalidates
* the widget (thus scheduling it to receive a draw on the next
* frame). gtk_widget_queue_draw() will also end up requesting a frame
* on the appropriate frame clock.
*
* A widget’s frame clock will not change while the widget is
* mapped. Reparenting a widget (which implies a temporary unmap) can
* change the widget’s frame clock.
*
* Unrealized widgets do not have a frame clock.
*
* Returns: (nullable) (transfer none): a `GdkFrameClock`
*/
GdkFrameClock*
gtk_widget_get_frame_clock (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (priv->realized)
{
GdkSurface *surface = gtk_widget_get_surface (widget);
return gdk_surface_get_frame_clock (surface);
}
else
{
return NULL;
}
}
static int
get_number (GtkCssValue *value)
{
double d = _gtk_css_number_value_get (value, 100);
if (d < 1)
return ceil (d);
else
return floor (d);
}
static void
get_box_margin (GtkCssStyle *style,
GtkBorder *margin)
{
margin->top = get_number (style->size->margin_top);
margin->left = get_number (style->size->margin_left);
margin->bottom = get_number (style->size->margin_bottom);
margin->right = get_number (style->size->margin_right);
}
static void
get_box_border (GtkCssStyle *style,
GtkBorder *border)
{
border->top = get_number (style->border->border_top_width);
border->left = get_number (style->border->border_left_width);
border->bottom = get_number (style->border->border_bottom_width);
border->right = get_number (style->border->border_right_width);
}
static void
get_box_padding (GtkCssStyle *style,
GtkBorder *border)
{
border->top = get_number (style->size->padding_top);
border->left = get_number (style->size->padding_left);
border->bottom = get_number (style->size->padding_bottom);
border->right = get_number (style->size->padding_right);
}
/**
* gtk_widget_size_allocate:
* @widget: a `GtkWidget`
* @allocation: position and size to be allocated to @widget
* @baseline: The baseline of the child, or -1
*
* Allocates widget with a transformation that translates
* the origin to the position in @allocation.
*
* This is a simple form of [method@Gtk.Widget.allocate].
*/
void
gtk_widget_size_allocate (GtkWidget *widget,
const GtkAllocation *allocation,
int baseline)
{
GskTransform *transform;
if (allocation->x || allocation->y)
transform = gsk_transform_translate (NULL, &GRAPHENE_POINT_INIT (allocation->x, allocation->y));
else
transform = NULL;
gtk_widget_allocate (widget,
allocation->width,
allocation->height,
baseline,
transform);
}
/* translate initial/final into start/end */
static GtkAlign
effective_align (GtkAlign align,
GtkTextDirection direction)
{
switch (align)
{
case GTK_ALIGN_START:
return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_END : GTK_ALIGN_START;
case GTK_ALIGN_END:
return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_START : GTK_ALIGN_END;
case GTK_ALIGN_FILL:
case GTK_ALIGN_CENTER:
case GTK_ALIGN_BASELINE_FILL:
case GTK_ALIGN_BASELINE_CENTER:
default:
return align;
}
}
static void
adjust_for_align (GtkAlign align,
int natural_size,
int *allocated_pos,
int *allocated_size,
int nat_baseline,
int *allocated_baseline)
{
switch (align)
{
case GTK_ALIGN_BASELINE_CENTER:
if (*allocated_size > natural_size &&
nat_baseline > -1 &&
*allocated_baseline > -1)
{
*allocated_pos = *allocated_baseline - nat_baseline;
*allocated_size = MIN (*allocated_size, natural_size);
*allocated_baseline = nat_baseline;
break;
}
G_GNUC_FALLTHROUGH;
case GTK_ALIGN_CENTER:
if (*allocated_size > natural_size)
{
*allocated_pos += (*allocated_size - natural_size) / 2;
*allocated_size = MIN (*allocated_size, natural_size);
}
break;
case GTK_ALIGN_BASELINE_FILL:
case GTK_ALIGN_FILL:
default:
/* change nothing */
break;
case GTK_ALIGN_START:
/* keep *allocated_pos where it is */
*allocated_size = MIN (*allocated_size, natural_size);
break;
case GTK_ALIGN_END:
if (*allocated_size > natural_size)
{
*allocated_pos += (*allocated_size - natural_size);
*allocated_size = natural_size;
}
break;
}
}
static inline void
gtk_widget_adjust_size_allocation (GtkWidget *widget,
GtkAllocation *allocation,
int *baseline)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
int natural_width, natural_height, nat_baseline;
int min_width, min_height;
if (priv->halign == GTK_ALIGN_FILL && priv->valign == GTK_ALIGN_FILL)
goto out;
/* Note that adjust_for_align removes any margins from the
* allocated sizes and possibly limits them to the natural sizes
*/
if (priv->halign == GTK_ALIGN_FILL ||
(priv->valign != GTK_ALIGN_FILL &&
gtk_widget_get_request_mode (widget) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH))
{
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL,
allocation->height + priv->margin.top + priv->margin.bottom,
&min_width, NULL, NULL, NULL);
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL,
-1,
NULL, &natural_width, NULL, NULL);
natural_width = MAX (min_width, natural_width);
adjust_for_align (effective_align (priv->halign, _gtk_widget_get_direction (widget)),
natural_width - priv->margin.left - priv->margin.right,
&allocation->x,
&allocation->width,
-1, baseline);
gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL,
allocation->width + priv->margin.left + priv->margin.right,
NULL, &natural_height, NULL, &nat_baseline);
adjust_for_align (priv->valign,
natural_height - priv->margin.top - priv->margin.bottom,
&allocation->y,
&allocation->height,
nat_baseline > -1 ? nat_baseline - priv->margin.top : -1,
baseline);
}
else
{
gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL,
allocation->width + priv->margin.left + priv->margin.right,
&min_height, NULL, NULL, NULL);
gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL,
-1,
NULL, &natural_height, NULL, &nat_baseline);
natural_height = MAX (min_height, natural_height);
adjust_for_align (priv->valign,
natural_height - priv->margin.top - priv->margin.bottom,
&allocation->y,
&allocation->height,
nat_baseline > -1 ? nat_baseline - priv->margin.top : -1,
baseline);
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL,
allocation->height + priv->margin.top + priv->margin.bottom,
&min_width, &natural_width, NULL, NULL);
adjust_for_align (effective_align (priv->halign, _gtk_widget_get_direction (widget)),
natural_width - priv->margin.left - priv->margin.right,
&allocation->x,
&allocation->width,
-1, NULL);
}
out:
if (priv->valign != GTK_ALIGN_BASELINE_FILL &&
priv->valign != GTK_ALIGN_BASELINE_CENTER)
*baseline = -1;
}
static void
gtk_widget_ensure_allocate_on_children (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidget *child;
g_assert (!priv->resize_needed);
g_assert (!priv->alloc_needed);
if (!priv->alloc_needed_on_child)
return;
priv->alloc_needed_on_child = FALSE;
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
if (gtk_widget_should_layout (child))
gtk_widget_ensure_allocate (child);
}
}
/**
* gtk_widget_allocate:
* @widget: A `GtkWidget`
* @width: New width of @widget
* @height: New height of @widget
* @baseline: New baseline of @widget, or -1
* @transform: (transfer full) (nullable): Transformation to be applied to @widget
*
* This function is only used by `GtkWidget` subclasses, to
* assign a size, position and (optionally) baseline to their
* child widgets.
*
* In this function, the allocation and baseline may be adjusted.
* The given allocation will be forced to be bigger than the
* widget's minimum size, as well as at least 0×0 in size.
*
* For a version that does not take a transform, see
* [method@Gtk.Widget.size_allocate].
*/
void
gtk_widget_allocate (GtkWidget *widget,
int width,
int height,
int baseline,
GskTransform *transform)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GdkRectangle adjusted;
gboolean alloc_needed;
gboolean size_changed;
gboolean baseline_changed;
gboolean transform_changed;
GtkCssStyle *style;
GtkBorder margin, border, padding;
GskTransform *css_transform;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (baseline >= -1);
gtk_widget_push_verify_invariants (widget);
if (!priv->visible && !GTK_IS_ROOT (widget))
{
gsk_transform_unref (transform);
goto out;
}
#ifdef G_ENABLE_DEBUG
if (gtk_widget_get_resize_needed (widget))
{
g_warning ("Allocating size to %s %p without calling gtk_widget_measure(). "
"How does the code know the size to allocate?",
gtk_widget_get_name (widget), widget);
}
if (!GTK_IS_SCROLLABLE (widget))
{
int min;
gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL, width, &min, NULL, NULL, NULL);
if (min > height)
{
g_critical ("Allocation height too small. Tried to allocate %dx%d, but %s %p needs "
"at least %dx%d.",
width, height,
gtk_widget_get_name (widget), widget,
width, min);
}
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, height, &min, NULL, NULL, NULL);
if (min > width)
{
g_critical ("Allocation width too small. Tried to allocate %dx%d, but %s %p needs "
"at least %dx%d.",
width, height,
gtk_widget_get_name (widget), widget,
min, height);
}
}
#endif /* G_ENABLE_DEBUG */
alloc_needed = priv->alloc_needed;
/* Preserve request/allocate ordering */
priv->alloc_needed = FALSE;
baseline_changed = priv->allocated_baseline != baseline;
transform_changed = !gsk_transform_equal (priv->allocated_transform, transform);
gsk_transform_unref (priv->allocated_transform);
priv->allocated_transform = gsk_transform_ref (transform);
priv->allocated_width = width;
priv->allocated_height = height;
priv->allocated_baseline = baseline;
if (_gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
adjusted.x = priv->margin.left;
else
adjusted.x = priv->margin.right;
adjusted.y = priv->margin.top;
adjusted.width = width - priv->margin.left - priv->margin.right;
adjusted.height = height - priv->margin.top - priv->margin.bottom;
if (baseline >= 0)
baseline -= priv->margin.top;
gtk_widget_adjust_size_allocation (widget, &adjusted, &baseline);
if (adjusted.width < 0 || adjusted.height < 0)
{
g_warning ("gtk_widget_size_allocate(): attempt to allocate %s %s %p with width %d and height %d",
G_OBJECT_TYPE_NAME (widget), g_quark_to_string (gtk_css_node_get_name (priv->cssnode)), widget,
adjusted.width,
adjusted.height);
adjusted.width = 0;
adjusted.height = 0;
}
style = gtk_css_node_get_style (priv->cssnode);
get_box_margin (style, &margin);
get_box_border (style, &border);
get_box_padding (style, &padding);
/* Apply CSS transformation */
adjusted.x += margin.left;
adjusted.y += margin.top;
adjusted.width -= margin.left + margin.right;
adjusted.height -= margin.top + margin.bottom;
css_transform = gtk_css_transform_value_get_transform (style->other->transform);
if (css_transform)
{
double origin_x, origin_y;
origin_x = _gtk_css_position_value_get_x (style->other->transform_origin, adjusted.width);
origin_y = _gtk_css_position_value_get_y (style->other->transform_origin, adjusted.height);
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (adjusted.x, adjusted.y));
adjusted.x = adjusted.y = 0;
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (origin_x, origin_y));
transform = gsk_transform_transform (transform, css_transform);
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (- origin_x, - origin_y));
gsk_transform_unref (css_transform);
}
adjusted.x += border.left + padding.left;
adjusted.y += border.top + padding.top;
if (baseline >= 0)
baseline -= margin.top + border.top + padding.top;
if (adjusted.x || adjusted.y)
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (adjusted.x, adjusted.y));
gsk_transform_unref (priv->transform);
priv->transform = transform;
if (priv->surface_transform_data)
sync_widget_surface_transform (widget);
/* Since gtk_widget_measure does it for us, we can be sure here that
* the given alloaction is large enough for the css margin/bordder/padding */
adjusted.width -= border.left + padding.left +
border.right + padding.right;
adjusted.height -= border.top + padding.top +
border.bottom + padding.bottom;
size_changed = (priv->width != adjusted.width) || (priv->height != adjusted.height);
if (!alloc_needed && !size_changed && !baseline_changed)
{
gtk_widget_ensure_allocate_on_children (widget);
}
else
{
priv->width = adjusted.width;
priv->height = adjusted.height;
priv->baseline = baseline;
priv->alloc_needed_on_child = FALSE;
if (priv->layout_manager != NULL)
{
gtk_layout_manager_allocate (priv->layout_manager, widget,
priv->width,
priv->height,
baseline);
}
else
{
GTK_WIDGET_GET_CLASS (widget)->size_allocate (widget,
priv->width,
priv->height,
baseline);
}
/* Size allocation is god... after consulting god, no further requests or allocations are needed */
if (GTK_DISPLAY_DEBUG_CHECK (_gtk_widget_get_display (widget), GEOMETRY) &&
gtk_widget_get_resize_needed (widget))
{
g_warning ("%s %p or a child called gtk_widget_queue_resize() during size_allocate().",
gtk_widget_get_name (widget), widget);
}
gtk_widget_ensure_resize (widget);
priv->alloc_needed = FALSE;
gtk_widget_update_paintables (widget);
if (size_changed)
gtk_accessible_bounds_changed (GTK_ACCESSIBLE (widget));
if (size_changed || baseline_changed)
gtk_widget_queue_draw (widget);
}
if (transform_changed && priv->parent)
gtk_widget_queue_draw (priv->parent);
out:
gtk_widget_pop_verify_invariants (widget);
}
/**
* gtk_widget_common_ancestor:
* @widget_a: a `GtkWidget`
* @widget_b: a `GtkWidget`
*
* Find the common ancestor of @widget_a and @widget_b that
* is closest to the two widgets.
*
* Returns: (nullable): the closest common ancestor of @widget_a and
* @widget_b or %NULL if @widget_a and @widget_b do not
* share a common ancestor.
*/
GtkWidget *
gtk_widget_common_ancestor (GtkWidget *widget_a,
GtkWidget *widget_b)
{
GtkWidget *parent_a;
GtkWidget *parent_b;
int depth_a = 0;
int depth_b = 0;
parent_a = widget_a;
while (parent_a->priv->parent)
{
parent_a = parent_a->priv->parent;
depth_a++;
}
parent_b = widget_b;
while (parent_b->priv->parent)
{
parent_b = parent_b->priv->parent;
depth_b++;
}
if (parent_a != parent_b)
return NULL;
while (depth_a > depth_b)
{
widget_a = widget_a->priv->parent;
depth_a--;
}
while (depth_b > depth_a)
{
widget_b = widget_b->priv->parent;
depth_b--;
}
while (widget_a != widget_b)
{
widget_a = widget_a->priv->parent;
widget_b = widget_b->priv->parent;
}
return widget_a;
}
/**
* gtk_widget_translate_coordinates:
* @src_widget: a `GtkWidget`
* @dest_widget: a `GtkWidget`
* @src_x: X position relative to @src_widget
* @src_y: Y position relative to @src_widget
* @dest_x: (out) (optional): location to store X position relative to @dest_widget
* @dest_y: (out) (optional): location to store Y position relative to @dest_widget
*
* Translate coordinates relative to @src_widget’s allocation
* to coordinates relative to @dest_widget’s allocations.
*
* In order to perform this operation, both widget must share
* a common ancestor.
*
* Returns: %FALSE if @src_widget and @dest_widget have no common
* ancestor. In this case, 0 is stored in *@dest_x and *@dest_y.
* Otherwise %TRUE.
*
* Deprecated: 4.12: Use gtk_widget_compute_point() instead
*/
gboolean
gtk_widget_translate_coordinates (GtkWidget *src_widget,
GtkWidget *dest_widget,
double src_x,
double src_y,
double *dest_x,
double *dest_y)
{
graphene_point_t p;
if (!gtk_widget_compute_point (src_widget, dest_widget,
&GRAPHENE_POINT_INIT (src_x, src_y),
&p))
return FALSE;
if (dest_x)
*dest_x = p.x;
if (dest_y)
*dest_y = p.y;
return TRUE;
}
/**
* gtk_widget_compute_point:
* @widget: the `GtkWidget` to query
* @target: the `GtkWidget` to transform into
* @point: a point in @widget's coordinate system
* @out_point: (out caller-allocates): Set to the corresponding coordinates in
* @target's coordinate system
*
* Translates the given @point in @widget's coordinates to coordinates
* relative to @target’s coordinate system.
*
* In order to perform this operation, both widgets must share a
* common ancestor.
*
* Returns: %TRUE if the point could be determined, %FALSE on failure.
* In this case, 0 is stored in @out_point.
*/
gboolean
gtk_widget_compute_point (GtkWidget *widget,
GtkWidget *target,
const graphene_point_t *point,
graphene_point_t *out_point)
{
graphene_matrix_t transform;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (target), FALSE);
if (!gtk_widget_compute_transform (widget, target, &transform))
{
graphene_point_init (out_point, 0, 0);
return FALSE;
}
gsk_matrix_transform_point (&transform, point, out_point);
return TRUE;
}
/**
* gtk_widget_class_add_binding: (skip)
* @widget_class: the class to add the binding to
* @keyval: key value of binding to install
* @mods: key modifier of binding to install
* @callback: the callback to call upon activation
* @format_string: (nullable): GVariant format string for arguments
* or %NULL for no arguments
* @...: arguments, as given by format string
*
* Creates a new shortcut for @widget_class that calls the given @callback
* with arguments read according to @format_string.
*
* The arguments and format string must be provided in the same way as
* with g_variant_new().
*
* This function is a convenience wrapper around
* [method@Gtk.WidgetClass.add_shortcut] and must be called during class
* initialization. It does not provide for user_data, if you need that,
* you will have to use [method@Gtk.WidgetClass.add_shortcut] with a custom
* shortcut.
*/
void
gtk_widget_class_add_binding (GtkWidgetClass *widget_class,
guint keyval,
GdkModifierType mods,
GtkShortcutFunc callback,
const char *format_string,
...)
{
GtkShortcut *shortcut;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
shortcut = gtk_shortcut_new (gtk_keyval_trigger_new (keyval, mods),
gtk_callback_action_new (callback, NULL, NULL));
if (format_string)
{
va_list args;
va_start (args, format_string);
gtk_shortcut_set_arguments (shortcut,
g_variant_new_va (format_string, NULL, &args));
va_end (args);
}
gtk_widget_class_add_shortcut (widget_class, shortcut);
g_object_unref (shortcut);
}
/**
* gtk_widget_class_add_binding_signal: (skip)
* @widget_class: the class to add the binding to
* @keyval: key value of binding to install
* @mods: key modifier of binding to install
* @signal: the signal to execute
* @format_string: (nullable): GVariant format string for arguments
* or %NULL for no arguments
* @...: arguments, as given by format string
*
* Creates a new shortcut for @widget_class that emits the given action
* @signal with arguments read according to @format_string.
*
* The arguments and format string must be provided in the same way as
* with g_variant_new().
*
* This function is a convenience wrapper around
* [method@Gtk.WidgetClass.add_shortcut] and must be called during class
* initialization.
*/
void
gtk_widget_class_add_binding_signal (GtkWidgetClass *widget_class,
guint keyval,
GdkModifierType mods,
const char *signal,
const char *format_string,
...)
{
GtkShortcut *shortcut;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (g_signal_lookup (signal, G_TYPE_FROM_CLASS (widget_class)));
/* XXX: validate variant format for signal */
shortcut = gtk_shortcut_new (gtk_keyval_trigger_new (keyval, mods),
gtk_signal_action_new (signal));
if (format_string)
{
va_list args;
va_start (args, format_string);
gtk_shortcut_set_arguments (shortcut,
g_variant_new_va (format_string, NULL, &args));
va_end (args);
}
gtk_widget_class_add_shortcut (widget_class, shortcut);
g_object_unref (shortcut);
}
/**
* gtk_widget_class_add_binding_action: (skip)
* @widget_class: the class to add the binding to
* @keyval: key value of binding to install
* @mods: key modifier of binding to install
* @action_name: the action to activate
* @format_string: (nullable): GVariant format string for arguments
* or %NULL for no arguments
* @...: arguments, as given by format string
*
* Creates a new shortcut for @widget_class that activates the given
* @action_name with arguments read according to @format_string.
*
* The arguments and format string must be provided in the same way as
* with g_variant_new().
*
* This function is a convenience wrapper around
* [method@Gtk.WidgetClass.add_shortcut] and must be called during class
* initialization.
*/
void
gtk_widget_class_add_binding_action (GtkWidgetClass *widget_class,
guint keyval,
GdkModifierType mods,
const char *action_name,
const char *format_string,
...)
{
GtkShortcut *shortcut;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
/* XXX: validate variant format for action */
shortcut = gtk_shortcut_new (gtk_keyval_trigger_new (keyval, mods),
gtk_named_action_new (action_name));
if (format_string)
{
va_list args;
va_start (args, format_string);
gtk_shortcut_set_arguments (shortcut,
g_variant_new_va (format_string, NULL, &args));
va_end (args);
}
gtk_widget_class_add_shortcut (widget_class, shortcut);
g_object_unref (shortcut);
}
/**
* gtk_widget_class_add_shortcut:
* @widget_class: the class to add the shortcut to
* @shortcut: (transfer none): the `GtkShortcut` to add
*
* Installs a shortcut in @widget_class.
*
* Every instance created for @widget_class or its subclasses will
* inherit this shortcut and trigger it.
*
* Shortcuts added this way will be triggered in the %GTK_PHASE_BUBBLE
* phase, which means they may also trigger if child widgets have focus.
*
* This function must only be used in class initialization functions
* otherwise it is not guaranteed that the shortcut will be installed.
*/
void
gtk_widget_class_add_shortcut (GtkWidgetClass *widget_class,
GtkShortcut *shortcut)
{
GtkWidgetClassPrivate *priv;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (GTK_IS_SHORTCUT (shortcut));
priv = widget_class->priv;
g_list_store_append (priv->shortcuts, shortcut);
}
/**
* gtk_widget_mnemonic_activate:
* @widget: a `GtkWidget`
* @group_cycling: %TRUE if there are other widgets with the same mnemonic
*
* Emits the ::mnemonic-activate signal.
*
* See [signal@Gtk.Widget::mnemonic-activate].
*
* Returns: %TRUE if the signal has been handled
*/
gboolean
gtk_widget_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling)
{
gboolean handled;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
group_cycling = group_cycling != FALSE;
if (!gtk_widget_is_sensitive (widget))
handled = TRUE;
else
g_signal_emit (widget,
widget_signals[MNEMONIC_ACTIVATE],
0,
group_cycling,
&handled);
return handled;
}
/*< private >
* gtk_widget_can_activate:
* @self: a `GtkWidget`
*
* Checks whether a `GtkWidget` can be activated.
*
* To activate a widget, use [method@Gtk.Widget.activate].
*/
gboolean
gtk_widget_can_activate (GtkWidget *self)
{
g_return_val_if_fail (GTK_IS_WIDGET (self), FALSE);
GtkWidgetClass *widget_class = GTK_WIDGET_GET_CLASS (self);
if (widget_class->priv->activate_signal != 0)
return TRUE;
return FALSE;
}
static gboolean
get_effective_can_focus (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!priv->can_focus)
return FALSE;
if (priv->parent)
return get_effective_can_focus (priv->parent);
return TRUE;
}
static gboolean
gtk_widget_real_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling)
{
if (!group_cycling && gtk_widget_can_activate (widget))
gtk_widget_activate (widget);
else if (get_effective_can_focus (widget))
return gtk_widget_grab_focus (widget);
else
{
g_warning ("widget '%s' isn't suitable for mnemonic activation",
G_OBJECT_TYPE_NAME (widget));
gtk_widget_error_bell (widget);
}
return TRUE;
}
#define WIDGET_REALIZED_FOR_EVENT(widget, event) \
(gdk_event_get_event_type (event) == GDK_FOCUS_CHANGE || _gtk_widget_get_realized (widget))
gboolean
gtk_widget_run_controllers (GtkWidget *widget,
GdkEvent *event,
GtkWidget *target,
double x,
double y,
GtkPropagationPhase phase)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkEventController *controller;
gboolean handled = FALSE;
GList *l;
g_object_ref (widget);
l = priv->event_controllers;
while (l != NULL)
{
GList *next = l->next;
if (!WIDGET_REALIZED_FOR_EVENT (widget, event))
break;
controller = l->data;
if (controller == NULL)
{
priv->event_controllers = g_list_delete_link (priv->event_controllers, l);
}
else
{
GtkPropagationPhase controller_phase;
controller_phase = gtk_event_controller_get_propagation_phase (controller);
if (controller_phase == phase)
{
gboolean this_handled;
gboolean is_gesture;
is_gesture = GTK_IS_GESTURE (controller);
this_handled = gtk_event_controller_handle_event (controller, event, target, x, y);
if (GTK_DEBUG_CHECK (KEYBINDINGS))
{
GdkEventType type = gdk_event_get_event_type (event);
if (this_handled &&
(type == GDK_KEY_PRESS || type == GDK_KEY_RELEASE))
{
g_message ("key %s (keyval %d) handled at widget %s by controller %s",
type == GDK_KEY_PRESS ? "press" : "release",
gdk_key_event_get_keyval (event),
G_OBJECT_TYPE_NAME (widget),
gtk_event_controller_get_name (controller));
}
}
handled |= this_handled;
/* Non-gesture controllers are basically unique entities not meant
* to collaborate with anything else. Break early if any such event
* controller handled the event.
*/
if (this_handled && !is_gesture)
break;
}
}
l = next;
}
g_object_unref (widget);
return handled;
}
void
gtk_widget_handle_crossing (GtkWidget *widget,
const GtkCrossingData *crossing,
double x,
double y)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
g_object_ref (widget);
if (crossing->old_target)
g_object_ref (crossing->old_target);
if (crossing->new_target)
g_object_ref (crossing->new_target);
if (crossing->old_descendent)
g_object_ref (crossing->old_descendent);
if (crossing->new_descendent)
g_object_ref (crossing->new_descendent);
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller = l->data;
gtk_event_controller_handle_crossing (controller, crossing, x, y);
}
if (crossing->old_target)
g_object_unref (crossing->old_target);
if (crossing->new_target)
g_object_unref (crossing->new_target);
if (crossing->old_descendent)
g_object_unref (crossing->old_descendent);
if (crossing->new_descendent)
g_object_unref (crossing->new_descendent);
g_object_unref (widget);
}
static gboolean
event_surface_is_still_viewable (GdkEvent *event)
{
/* Check that we think the event's window is viewable before
* delivering the event, to prevent surprises. We do this here
* at the last moment, since the event may have been queued
* up behind other events, held over a recursive main loop, etc.
*/
switch ((guint) gdk_event_get_event_type (event))
{
case GDK_MOTION_NOTIFY:
case GDK_BUTTON_PRESS:
case GDK_KEY_PRESS:
case GDK_ENTER_NOTIFY:
case GDK_PROXIMITY_IN:
case GDK_SCROLL:
return gdk_surface_get_mapped (gdk_event_get_surface (event));
#if 0
/* The following events are the second half of paired events;
* we always deliver them to deal with widgets that clean up
* on the second half.
*/
case GDK_BUTTON_RELEASE:
case GDK_KEY_RELEASE:
case GDK_LEAVE_NOTIFY:
case GDK_PROXIMITY_OUT:
#endif
default:
/* Remaining events would make sense on a not-viewable window,
* or don't have an associated window.
*/
return TRUE;
}
}
static gboolean
translate_event_coordinates (GdkEvent *event,
double *x,
double *y,
GtkWidget *widget)
{
GtkWidget *event_widget;
graphene_point_t p;
double event_x, event_y;
GtkNative *native;
double nx, ny;
*x = *y = 0;
if (!gdk_event_get_position (event, &event_x, &event_y))
return FALSE;
event_widget = gtk_get_event_widget (event);
native = gtk_widget_get_native (event_widget);
gtk_native_get_surface_transform (native, &nx, &ny);
event_x -= nx;
event_y -= ny;
if (!gtk_widget_compute_point (event_widget,
widget,
&GRAPHENE_POINT_INIT (event_x, event_y),
&p))
return FALSE;
*x = p.x;
*y = p.y;
return TRUE;
}
gboolean
_gtk_widget_captured_event (GtkWidget *widget,
GdkEvent *event,
GtkWidget *target)
{
gboolean return_val = FALSE;
double x, y;
g_return_val_if_fail (GTK_IS_WIDGET (widget), TRUE);
g_return_val_if_fail (WIDGET_REALIZED_FOR_EVENT (widget, event), TRUE);
if (!event_surface_is_still_viewable (event))
return TRUE;
translate_event_coordinates (event, &x, &y, widget);
return_val = gtk_widget_run_controllers (widget, event, target, x, y, GTK_PHASE_CAPTURE);
return_val |= !WIDGET_REALIZED_FOR_EVENT (widget, event);
return return_val;
}
gboolean
gtk_widget_event (GtkWidget *widget,
GdkEvent *event,
GtkWidget *target)
{
gboolean return_val = FALSE;
double x, y;
/* We check only once for is-still-visible; if someone
* hides the window in one of the signals on the widget,
* they are responsible for returning TRUE to terminate
* handling.
*/
if (!event_surface_is_still_viewable (event))
return TRUE;
if (!_gtk_widget_get_mapped (widget))
return FALSE;
translate_event_coordinates (event, &x, &y, widget);
if (widget == target)
return_val |= gtk_widget_run_controllers (widget, event, target, x, y, GTK_PHASE_TARGET);
if (return_val == FALSE)
return_val |= gtk_widget_run_controllers (widget, event, target, x, y, GTK_PHASE_BUBBLE);
return return_val;
}
/**
* gtk_widget_class_get_activate_signal:
* @widget_class: a `GtkWidgetClass`
*
* Retrieves the signal id for the activation signal.
*
* the activation signal is set using
* [method@Gtk.WidgetClass.set_activate_signal].
*
* Returns: a signal id, or 0 if the widget class does not
* specify an activation signal
*/
guint
gtk_widget_class_get_activate_signal (GtkWidgetClass *widget_class)
{
g_return_val_if_fail (GTK_IS_WIDGET_CLASS (widget_class), 0);
return widget_class->priv->activate_signal;
}
/**
* gtk_widget_class_set_activate_signal:
* @widget_class: a `GtkWidgetClass`
* @signal_id: the id for the activate signal
*
* Sets the `GtkWidgetClass.activate_signal` field with the
* given @signal_id.
*
* The signal will be emitted when calling [method@Gtk.Widget.activate].
*
* The @signal_id must have been registered with `g_signal_new()`
* or g_signal_newv() before calling this function.
*/
void
gtk_widget_class_set_activate_signal (GtkWidgetClass *widget_class,
guint signal_id)
{
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (signal_id != 0);
widget_class->priv->activate_signal = signal_id;
}
/**
* gtk_widget_class_set_activate_signal_from_name:
* @widget_class: a `GtkWidgetClass`
* @signal_name: the name of the activate signal of @widget_type
*
* Sets the `GtkWidgetClass.activate_signal` field with the signal id for
* the given @signal_name.
*
* The signal will be emitted when calling [method@Gtk.Widget.activate].
*
* The @signal_name of @widget_type must have been registered with
* g_signal_new() or g_signal_newv() before calling this function.
*/
void
gtk_widget_class_set_activate_signal_from_name (GtkWidgetClass *widget_class,
const char *signal_name)
{
guint signal_id;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (signal_name != NULL);
signal_id = g_signal_lookup (signal_name, G_TYPE_FROM_CLASS (widget_class));
if (signal_id == 0)
{
g_critical ("Widget type “%s” does not have a “%s” signal",
G_OBJECT_CLASS_NAME (widget_class),
signal_name);
return;
}
widget_class->priv->activate_signal = signal_id;
}
/**
* gtk_widget_activate:
* @widget: a `GtkWidget` that’s activatable
*
* For widgets that can be “activated” (buttons, menu items, etc.),
* this function activates them.
*
* The activation will emit the signal set using
* [method@Gtk.WidgetClass.set_activate_signal] during class initialization.
*
* Activation is what happens when you press <kbd>Enter</kbd>
* on a widget during key navigation.
*
* If you wish to handle the activation keybinding yourself, it is
* recommended to use [method@Gtk.WidgetClass.add_shortcut] with an action
* created with [ctor@Gtk.SignalAction.new].
*
* If @widget isn't activatable, the function returns %FALSE.
*
* Returns: %TRUE if the widget was activatable
*/
gboolean
gtk_widget_activate (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (gtk_widget_can_activate (widget))
{
GtkWidgetClass *widget_class = GTK_WIDGET_GET_CLASS (widget);
/* FIXME: we should eventually check the signals signature here */
g_signal_emit (widget, widget_class->priv->activate_signal, 0);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_widget_grab_focus:
* @widget: a `GtkWidget`
*
* Causes @widget to have the keyboard focus for the `GtkWindow` it's inside.
*
* If @widget is not focusable, or its [vfunc@Gtk.Widget.grab_focus]
* implementation cannot transfer the focus to a descendant of @widget
* that is focusable, it will not take focus and %FALSE will be returned.
*
* Calling [method@Gtk.Widget.grab_focus] on an already focused widget
* is allowed, should not have an effect, and return %TRUE.
*
* Returns: %TRUE if focus is now inside @widget.
*/
gboolean
gtk_widget_grab_focus (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (!gtk_widget_is_sensitive (widget) ||
!get_effective_can_focus (widget) ||
widget->priv->root == NULL)
return FALSE;
return GTK_WIDGET_GET_CLASS (widget)->grab_focus (widget);
}
gboolean
gtk_widget_grab_focus_self (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!priv->focusable)
return FALSE;
gtk_root_set_focus (priv->root, widget);
return TRUE;
}
gboolean
gtk_widget_grab_focus_child (GtkWidget *widget)
{
GtkWidget *child;
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
if (gtk_widget_grab_focus (child))
return TRUE;
}
return FALSE;
}
gboolean
gtk_widget_query_tooltip (GtkWidget *widget,
int x,
int y,
gboolean keyboard_mode,
GtkTooltip *tooltip)
{
gboolean retval = FALSE;
g_signal_emit (widget,
widget_signals[QUERY_TOOLTIP],
0,
x, y,
keyboard_mode,
tooltip,
&retval);
return retval;
}
static void
gtk_widget_real_css_changed (GtkWidget *widget,
GtkCssStyleChange *change)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (change)
{
const gboolean has_text = gtk_widget_peek_pango_context (widget) != NULL;
if (has_text && gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT))
gtk_widget_update_default_pango_context (widget);
if (priv->root)
{
if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_SIZE) ||
(has_text && gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT_SIZE)))
{
gtk_widget_queue_resize (widget);
}
else if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TRANSFORM) &&
priv->parent)
{
gtk_widget_queue_allocate (priv->parent);
}
if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_REDRAW) ||
(has_text && gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT_CONTENT)))
{
gtk_widget_queue_draw (widget);
}
}
}
else
{
gtk_widget_update_default_pango_context (widget);
if (priv->root)
gtk_widget_queue_resize (widget);
}
}
static void
gtk_widget_real_system_setting_changed (GtkWidget *widget,
GtkSystemSetting setting)
{
GtkWidget *child;
if (setting == GTK_SYSTEM_SETTING_DPI ||
setting == GTK_SYSTEM_SETTING_FONT_NAME ||
setting == GTK_SYSTEM_SETTING_FONT_CONFIG)
{
gtk_widget_update_default_pango_context (widget);
if (gtk_widget_peek_pango_context (widget))
gtk_widget_queue_resize (widget);
}
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
gtk_widget_system_setting_changed (child, setting);
}
}
static gboolean
direction_is_forward (GtkDirectionType direction)
{
switch (direction)
{
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_RIGHT:
case GTK_DIR_DOWN:
return TRUE;
case GTK_DIR_TAB_BACKWARD:
case GTK_DIR_LEFT:
case GTK_DIR_UP:
return FALSE;
default:
g_assert_not_reached ();
}
}
static gboolean
gtk_widget_real_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkWidget *focus;
/* For focusable widgets, we want to focus the widget
* before its children. We differentiate 3 cases:
* 1) focus is currently on widget
* 2) focus is on some child
* 3) focus is outside
*/
if (gtk_widget_is_focus (widget))
{
if (direction_is_forward (direction) &&
gtk_widget_focus_move (widget, direction))
return TRUE;
return FALSE;
}
focus = gtk_window_get_focus (GTK_WINDOW (gtk_widget_get_root (widget)));
if (focus && gtk_widget_is_ancestor (focus, widget))
{
if (gtk_widget_focus_move (widget, direction))
return TRUE;
if (direction_is_forward (direction))
return FALSE;
else
return gtk_widget_grab_focus (widget);
}
if (!direction_is_forward (direction))
{
if (gtk_widget_focus_move (widget, direction))
return TRUE;
return gtk_widget_grab_focus (widget);
}
else
{
if (gtk_widget_grab_focus (widget))
return TRUE;
return gtk_widget_focus_move (widget, direction);
}
}
gboolean
gtk_widget_focus_self (GtkWidget *widget,
GtkDirectionType direction)
{
if (!gtk_widget_is_focus (widget))
{
gtk_widget_grab_focus (widget);
return TRUE;
}
return FALSE;
}
gboolean
gtk_widget_focus_child (GtkWidget *widget,
GtkDirectionType direction)
{
return gtk_widget_focus_move (widget, direction);
}
static void
gtk_widget_real_move_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkRoot *root;
root = _gtk_widget_get_root (widget);
if (widget != GTK_WIDGET (root))
g_signal_emit (root, widget_signals[MOVE_FOCUS], 0, direction);
}
static gboolean
gtk_widget_real_keynav_failed (GtkWidget *widget,
GtkDirectionType direction)
{
switch (direction)
{
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_TAB_BACKWARD:
return FALSE;
case GTK_DIR_UP:
case GTK_DIR_DOWN:
case GTK_DIR_LEFT:
case GTK_DIR_RIGHT:
default:
break;
}
gtk_widget_error_bell (widget);
return TRUE;
}
/**
* gtk_widget_set_can_focus: (attributes org.gtk.Method.set_property=can-focus)
* @widget: a `GtkWidget`
* @can_focus: whether or not the input focus can enter
* the widget or any of its children
*
* Specifies whether the input focus can enter the widget
* or any of its children.
*
* Applications should set @can_focus to %FALSE to mark a
* widget as for pointer/touch use only.
*
* Note that having @can_focus be %TRUE is only one of the
* necessary conditions for being focusable. A widget must
* also be sensitive and focusable and not have an ancestor
* that is marked as not can-focus in order to receive input
* focus.
*
* See [method@Gtk.Widget.grab_focus] for actually setting
* the input focus on a widget.
*/
void
gtk_widget_set_can_focus (GtkWidget *widget,
gboolean can_focus)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->can_focus != can_focus)
{
priv->can_focus = can_focus;
gtk_widget_queue_resize (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_CAN_FOCUS]);
}
}
/**
* gtk_widget_get_can_focus: (attributes org.gtk.Method.get_property=can-focus)
* @widget: a `GtkWidget`
*
* Determines whether the input focus can enter @widget or any
* of its children.
*
* See [method@Gtk.Widget.set_focusable].
*
* Returns: %TRUE if the input focus can enter @widget, %FALSE otherwise
*/
gboolean
gtk_widget_get_can_focus (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), TRUE);
return priv->can_focus;
}
/**
* gtk_widget_set_focusable: (attributes org.gtk.Method.set_property=focusable)
* @widget: a `GtkWidget`
* @focusable: whether or not @widget can own the input focus
*
* Specifies whether @widget can own the input focus.
*
* Widget implementations should set @focusable to %TRUE in
* their init() function if they want to receive keyboard input.
*
* Note that having @focusable be %TRUE is only one of the
* necessary conditions for being focusable. A widget must
* also be sensitive and can-focus and not have an ancestor
* that is marked as not can-focus in order to receive input
* focus.
*
* See [method@Gtk.Widget.grab_focus] for actually setting
* the input focus on a widget.
*/
void
gtk_widget_set_focusable (GtkWidget *widget,
gboolean focusable)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->focusable == focusable)
return;
priv->focusable = focusable;
gtk_widget_queue_resize (widget);
gtk_accessible_platform_changed (GTK_ACCESSIBLE (widget), GTK_ACCESSIBLE_PLATFORM_CHANGE_FOCUSABLE);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_FOCUSABLE]);
}
/**
* gtk_widget_get_focusable: (attributes org.gtk.Method.get_property=focusable)
* @widget: a `GtkWidget`
*
* Determines whether @widget can own the input focus.
*
* See [method@Gtk.Widget.set_focusable].
*
* Returns: %TRUE if @widget can own the input focus, %FALSE otherwise
*/
gboolean
gtk_widget_get_focusable (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->focusable;
}
/**
* gtk_widget_has_focus: (attributes org.gtk.Method.get_property=has-focus)
* @widget: a `GtkWidget`
*
* Determines if the widget has the global input focus.
*
* See [method@Gtk.Widget.is_focus] for the difference between
* having the global input focus, and only having the focus
* within a toplevel.
*
* Returns: %TRUE if the widget has the global input focus.
*/
gboolean
gtk_widget_has_focus (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->has_focus;
}
/**
* gtk_widget_has_visible_focus:
* @widget: a `GtkWidget`
*
* Determines if the widget should show a visible indication that
* it has the global input focus.
*
* This is a convenience function that takes into account whether
* focus indication should currently be shown in the toplevel window
* of @widget. See [method@Gtk.Window.get_focus_visible] for more
* information about focus indication.
*
* To find out if the widget has the global input focus, use
* [method@Gtk.Widget.has_focus].
*
* Returns: %TRUE if the widget should display a “focus rectangle”
*/
gboolean
gtk_widget_has_visible_focus (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
gboolean draw_focus;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (priv->has_focus)
{
GtkRoot *root = _gtk_widget_get_root (widget);
if (GTK_IS_WINDOW (root))
draw_focus = gtk_window_get_focus_visible (GTK_WINDOW (root));
else
draw_focus = TRUE;
}
else
draw_focus = FALSE;
return draw_focus;
}
/**
* gtk_widget_is_focus:
* @widget: a `GtkWidget`
*
* Determines if the widget is the focus widget within its
* toplevel.
*
* This does not mean that the [property@Gtk.Widget:has-focus]
* property is necessarily set; [property@Gtk.Widget:has-focus]
* will only be set if the toplevel widget additionally has the
* global input focus.
*
* Returns: %TRUE if the widget is the focus widget.
*/
gboolean
gtk_widget_is_focus (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (priv->root)
return widget == gtk_root_get_focus (priv->root);
return FALSE;
}
/**
* gtk_widget_set_focus_on_click: (attributes org.gtk.Method.set_property=focus-on-click)
* @widget: a `GtkWidget`
* @focus_on_click: whether the widget should grab focus when clicked
* with the mouse
*
* Sets whether the widget should grab focus when it is clicked
* with the mouse.
*
* Making mouse clicks not grab focus is useful in places like
* toolbars where you don’t want the keyboard focus removed from
* the main area of the application.
*/
void
gtk_widget_set_focus_on_click (GtkWidget *widget,
gboolean focus_on_click)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
focus_on_click = focus_on_click != FALSE;
if (priv->focus_on_click != focus_on_click)
{
priv->focus_on_click = focus_on_click;
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_FOCUS_ON_CLICK]);
}
}
/**
* gtk_widget_get_focus_on_click: (attributes org.gtk.Method.get_property=focus-on-click)
* @widget: a `GtkWidget`
*
* Returns whether the widget should grab focus when it is clicked
* with the mouse.
*
* See [method@Gtk.Widget.set_focus_on_click].
*
* Returns: %TRUE if the widget should grab focus when it is
* clicked with the mouse
*/
gboolean
gtk_widget_get_focus_on_click (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->focus_on_click;
}
/**
* gtk_widget_has_default: (attributes org.gtk.Method.get_property=has-default)
* @widget: a `GtkWidget`
*
* Determines whether @widget is the current default widget
* within its toplevel.
*
* Returns: %TRUE if @widget is the current default widget
* within its toplevel, %FALSE otherwise
*/
gboolean
gtk_widget_has_default (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->has_default;
}
void
_gtk_widget_set_has_default (GtkWidget *widget,
gboolean has_default)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->has_default = has_default;
if (has_default)
gtk_widget_add_css_class (widget, "default");
else
gtk_widget_remove_css_class (widget, "default");
}
/**
* gtk_widget_set_receives_default: (attributes org.gtk.Method.set_property=receives-default)
* @widget: a `GtkWidget`
* @receives_default: whether or not @widget can be a default widget.
*
* Specifies whether @widget will be treated as the default
* widget within its toplevel when it has the focus, even if
* another widget is the default.
*/
void
gtk_widget_set_receives_default (GtkWidget *widget,
gboolean receives_default)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->receives_default != receives_default)
{
priv->receives_default = receives_default;
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_RECEIVES_DEFAULT]);
}
}
/**
* gtk_widget_get_receives_default: (attributes org.gtk.Method.get_property=receives-default)
* @widget: a `GtkWidget`
*
* Determines whether @widget is always treated as the default widget
* within its toplevel when it has the focus, even if another widget
* is the default.
*
* See [method@Gtk.Widget.set_receives_default].
*
* Returns: %TRUE if @widget acts as the default widget when focused,
* %FALSE otherwise
*/
gboolean
gtk_widget_get_receives_default (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->receives_default;
}
/*< private >
* gtk_widget_has_grab:
* @widget: a `GtkWidget`
*
* Determines whether the widget is currently grabbing events, so it
* is the only widget receiving input events (keyboard and mouse).
*
* See also gtk_grab_add().
*
* Returns: %TRUE if the widget is in the grab_widgets stack
*/
gboolean
gtk_widget_has_grab (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!GTK_IS_WIDGET (widget)) return FALSE;
return priv->has_grab;
}
void
_gtk_widget_set_has_grab (GtkWidget *widget,
gboolean has_grab)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->has_grab = has_grab;
}
/**
* gtk_widget_set_name: (attributes org.gtk.Method.set_property=name)
* @widget: a `GtkWidget`
* @name: name for the widget
*
* Sets a widgets name.
*
* Setting a name allows you to refer to the widget from a
* CSS file. You can apply a style to widgets with a particular name
* in the CSS file. See the documentation for the CSS syntax (on the
* same page as the docs for [class@Gtk.StyleContext].
*
* Note that the CSS syntax has certain special characters to delimit
* and represent elements in a selector (period, #, >, *...), so using
* these will make your widget impossible to match by name. Any combination
* of alphanumeric symbols, dashes and underscores will suffice.
*/
void
gtk_widget_set_name (GtkWidget *widget,
const char *name)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_free (priv->name);
priv->name = g_strdup (name);
gtk_css_node_set_id (priv->cssnode, g_quark_from_string (priv->name));
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_NAME]);
}
/**
* gtk_widget_get_name: (attributes org.gtk.Method.get_property=name)
* @widget: a `GtkWidget`
*
* Retrieves the name of a widget.
*
* See [method@Gtk.Widget.set_name] for the significance of widget names.
*
* Returns: name of the widget. This string is owned by GTK and
* should not be modified or freed
*/
const char *
gtk_widget_get_name (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (priv->name)
return priv->name;
return G_OBJECT_TYPE_NAME (widget);
}
static void
gtk_widget_update_state_flags (GtkWidget *widget,
GtkStateFlags flags_to_set,
GtkStateFlags flags_to_unset)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
/* Handle insensitive first, since it is propagated
* differently throughout the widget hierarchy.
*/
if ((priv->state_flags & GTK_STATE_FLAG_INSENSITIVE) && (flags_to_unset & GTK_STATE_FLAG_INSENSITIVE))
gtk_widget_set_sensitive (widget, TRUE);
else if (!(priv->state_flags & GTK_STATE_FLAG_INSENSITIVE) && (flags_to_set & GTK_STATE_FLAG_INSENSITIVE))
gtk_widget_set_sensitive (widget, FALSE);
flags_to_set &= ~(GTK_STATE_FLAG_INSENSITIVE);
flags_to_unset &= ~(GTK_STATE_FLAG_INSENSITIVE);
if (flags_to_set != 0 || flags_to_unset != 0)
{
GtkStateData data;
data.old_scale_factor = gtk_widget_get_scale_factor (widget);
data.flags_to_set = flags_to_set;
data.flags_to_unset = flags_to_unset;
gtk_widget_propagate_state (widget, &data);
}
}
/**
* gtk_widget_set_state_flags:
* @widget: a `GtkWidget`
* @flags: State flags to turn on
* @clear: Whether to clear state before turning on @flags
*
* Turns on flag values in the current widget state.
*
* Typical widget states are insensitive, prelighted, etc.
*
* This function accepts the values %GTK_STATE_FLAG_DIR_LTR and
* %GTK_STATE_FLAG_DIR_RTL but ignores them. If you want to set
* the widget's direction, use [method@Gtk.Widget.set_direction].
*
* This function is for use in widget implementations.
*/
void
gtk_widget_set_state_flags (GtkWidget *widget,
GtkStateFlags flags,
gboolean clear)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
#define ALLOWED_FLAGS (~(GTK_STATE_FLAG_DIR_LTR | GTK_STATE_FLAG_DIR_RTL))
g_return_if_fail (GTK_IS_WIDGET (widget));
if ((!clear && (priv->state_flags & flags) == flags) ||
(clear && priv->state_flags == flags))
return;
if (clear)
gtk_widget_update_state_flags (widget, flags & ALLOWED_FLAGS, ~flags & ALLOWED_FLAGS);
else
gtk_widget_update_state_flags (widget, flags & ALLOWED_FLAGS, 0);
#undef ALLOWED_FLAGS
}
/**
* gtk_widget_unset_state_flags:
* @widget: a `GtkWidget`
* @flags: State flags to turn off
*
* Turns off flag values for the current widget state.
*
* See [method@Gtk.Widget.set_state_flags].
*
* This function is for use in widget implementations.
*/
void
gtk_widget_unset_state_flags (GtkWidget *widget,
GtkStateFlags flags)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if ((priv->state_flags & flags) == 0)
return;
gtk_widget_update_state_flags (widget, 0, flags);
}
/**
* gtk_widget_get_state_flags:
* @widget: a `GtkWidget`
*
* Returns the widget state as a flag set.
*
* It is worth mentioning that the effective %GTK_STATE_FLAG_INSENSITIVE
* state will be returned, that is, also based on parent insensitivity,
* even if @widget itself is sensitive.
*
* Also note that if you are looking for a way to obtain the
* [flags@Gtk.StateFlags] to pass to a [class@Gtk.StyleContext]
* method, you should look at [method@Gtk.StyleContext.get_state].
*
* Returns: The state flags for widget
*/
GtkStateFlags
gtk_widget_get_state_flags (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
return priv->state_flags;
}
/**
* gtk_widget_set_visible: (attributes org.gtk.Method.set_property=visible)
* @widget: a `GtkWidget`
* @visible: whether the widget should be shown or not
*
* Sets the visibility state of @widget.
*
* Note that setting this to %TRUE doesn’t mean the widget is
* actually viewable, see [method@Gtk.Widget.get_visible].
*/
void
gtk_widget_set_visible (GtkWidget *widget,
gboolean visible)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (visible)
gtk_widget_show (widget);
else
gtk_widget_hide (widget);
G_GNUC_END_IGNORE_DEPRECATIONS
}
void
_gtk_widget_set_visible_flag (GtkWidget *widget,
gboolean visible)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->visible = visible;
if (!visible)
{
g_clear_pointer (&priv->allocated_transform, gsk_transform_unref);
priv->allocated_width = 0;
priv->allocated_height = 0;
priv->allocated_baseline = 0;
g_clear_pointer (&priv->transform, gsk_transform_unref);
priv->width = 0;
priv->height = 0;
gtk_widget_update_paintables (widget);
}
}
/**
* gtk_widget_get_visible: (attributes org.gtk.Method.get_property=visible)
* @widget: a `GtkWidget`
*
* Determines whether the widget is visible.
*
* If you want to take into account whether the widget’s
* parent is also marked as visible, use
* [method@Gtk.Widget.is_visible] instead.
*
* This function does not check if the widget is
* obscured in any way.
*
* See [method@Gtk.Widget.set_visible].
*
* Returns: %TRUE if the widget is visible
*/
gboolean
gtk_widget_get_visible (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->visible;
}
/**
* gtk_widget_is_visible:
* @widget: a `GtkWidget`
*
* Determines whether the widget and all its parents are marked as
* visible.
*
* This function does not check if the widget is obscured in any way.
*
* See also [method@Gtk.Widget.get_visible] and
* [method@Gtk.Widget.set_visible].
*
* Returns: %TRUE if the widget and all its parents are visible
*/
gboolean
gtk_widget_is_visible (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
while (widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!priv->visible)
return FALSE;
widget = priv->parent;
}
return TRUE;
}
/**
* gtk_widget_is_drawable:
* @widget: a `GtkWidget`
*
* Determines whether @widget can be drawn to.
*
* A widget can be drawn if it is mapped and visible.
*
* Returns: %TRUE if @widget is drawable, %FALSE otherwise
*/
gboolean
gtk_widget_is_drawable (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return (_gtk_widget_get_visible (widget) &&
_gtk_widget_get_mapped (widget));
}
/**
* gtk_widget_get_realized:
* @widget: a `GtkWidget`
*
* Determines whether @widget is realized.
*
* Returns: %TRUE if @widget is realized, %FALSE otherwise
*/
gboolean
gtk_widget_get_realized (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->realized;
}
/**
* gtk_widget_get_mapped:
* @widget: a `GtkWidget`
*
* Whether the widget is mapped.
*
* Returns: %TRUE if the widget is mapped, %FALSE otherwise.
*/
gboolean
gtk_widget_get_mapped (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->mapped;
}
/**
* gtk_widget_set_sensitive: (attributes org.gtk.Method.set_property=sensitive)
* @widget: a `GtkWidget`
* @sensitive: %TRUE to make the widget sensitive
*
* Sets the sensitivity of a widget.
*
* A widget is sensitive if the user can interact with it.
* Insensitive widgets are “grayed out” and the user can’t
* interact with them. Insensitive widgets are known as
* “inactive”, “disabled”, or “ghosted” in some other toolkits.
*/
void
gtk_widget_set_sensitive (GtkWidget *widget,
gboolean sensitive)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
g_return_if_fail (GTK_IS_WIDGET (widget));
sensitive = (sensitive != FALSE);
if (priv->sensitive == sensitive)
return;
priv->sensitive = sensitive;
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller = l->data;
gtk_event_controller_reset (controller);
}
gtk_accessible_update_state (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_STATE_DISABLED, !sensitive,
-1);
if (priv->parent == NULL
|| gtk_widget_is_sensitive (priv->parent))
{
GtkStateData data;
data.old_scale_factor = gtk_widget_get_scale_factor (widget);
if (sensitive)
{
data.flags_to_set = 0;
data.flags_to_unset = GTK_STATE_FLAG_INSENSITIVE;
}
else
{
data.flags_to_set = GTK_STATE_FLAG_INSENSITIVE;
data.flags_to_unset = GTK_STATE_FLAG_PRELIGHT |
GTK_STATE_FLAG_ACTIVE;
}
gtk_widget_propagate_state (widget, &data);
update_cursor_on_state_change (widget);
}
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_SENSITIVE]);
}
/**
* gtk_widget_get_sensitive: (attributes org.gtk.Method.get_property=sensitive)
* @widget: a `GtkWidget`
*
* Returns the widget’s sensitivity.
*
* This function returns the value that has been set using
* [method@Gtk.Widget.set_sensitive]).
*
* The effective sensitivity of a widget is however determined
* by both its own and its parent widget’s sensitivity.
* See [method@Gtk.Widget.is_sensitive].
*
* Returns: %TRUE if the widget is sensitive
*/
gboolean
gtk_widget_get_sensitive (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->sensitive;
}
/**
* gtk_widget_is_sensitive:
* @widget: a `GtkWidget`
*
* Returns the widget’s effective sensitivity.
*
* This means it is sensitive itself and also its
* parent widget is sensitive.
*
* Returns: %TRUE if the widget is effectively sensitive
*/
gboolean
gtk_widget_is_sensitive (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return _gtk_widget_is_sensitive (widget);
}
/* Insert @widget into the children list of @parent,
* after @previous_sibling */
static void
gtk_widget_reposition_after (GtkWidget *widget,
GtkWidget *parent,
GtkWidget *previous_sibling)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkStateFlags parent_flags;
GtkWidget *prev_parent, *prev_previous;
GtkStateData data;
prev_parent = priv->parent;
prev_previous = priv->prev_sibling;
if (priv->parent == parent && previous_sibling == prev_previous)
return;
if (priv->parent != NULL && priv->parent != parent)
{
g_warning ("Can't set new parent %s %p on widget %s %p, "
"which already has parent %s %p",
gtk_widget_get_name (parent), (void *)parent,
gtk_widget_get_name (widget), (void *)widget,
gtk_widget_get_name (priv->parent), (void *)priv->parent);
return;
}
data.old_scale_factor = gtk_widget_get_scale_factor (widget);
if (priv->parent == NULL)
g_object_ref_sink (widget);
gtk_widget_push_verify_invariants (widget);
priv->parent = parent;
if (previous_sibling)
{
if (previous_sibling->priv->next_sibling)
previous_sibling->priv->next_sibling->priv->prev_sibling = widget;
if (priv->prev_sibling)
priv->prev_sibling->priv->next_sibling = priv->next_sibling;
if (priv->next_sibling)
priv->next_sibling->priv->prev_sibling = priv->prev_sibling;
if (parent->priv->first_child == widget)
parent->priv->first_child = priv->next_sibling;
if (parent->priv->last_child == widget)
parent->priv->last_child = priv->prev_sibling;
priv->prev_sibling = previous_sibling;
priv->next_sibling = previous_sibling->priv->next_sibling;
previous_sibling->priv->next_sibling = widget;
if (parent->priv->last_child == previous_sibling)
parent->priv->last_child = widget;
else if (parent->priv->last_child == widget)
parent->priv->last_child = priv->next_sibling;
}
else
{
/* Beginning */
if (parent->priv->last_child == widget)
{
parent->priv->last_child = priv->prev_sibling;
if (priv->prev_sibling)
priv->prev_sibling->priv->next_sibling = NULL;
}
if (priv->prev_sibling)
priv->prev_sibling->priv->next_sibling = priv->next_sibling;
if (priv->next_sibling)
priv->next_sibling->priv->prev_sibling = priv->prev_sibling;
priv->prev_sibling = NULL;
priv->next_sibling = parent->priv->first_child;
if (parent->priv->first_child)
parent->priv->first_child->priv->prev_sibling = widget;
parent->priv->first_child = widget;
if (parent->priv->last_child == NULL)
parent->priv->last_child = widget;
}
parent_flags = _gtk_widget_get_state_flags (parent);
/* Merge both old state and current parent state,
* making sure to only propagate the right states */
data.flags_to_set = parent_flags & GTK_STATE_FLAGS_DO_SET_PROPAGATE;
data.flags_to_unset = 0;
gtk_widget_propagate_state (widget, &data);
gtk_css_node_insert_after (parent->priv->cssnode,
priv->cssnode,
previous_sibling ? previous_sibling->priv->cssnode : NULL);
_gtk_widget_update_parent_muxer (widget);
if (parent->priv->root && priv->root == NULL)
gtk_widget_root (widget);
if (parent->priv->children_observer)
{
if (prev_previous)
gtk_list_list_model_item_moved (parent->priv->children_observer, widget, prev_previous);
else
gtk_list_list_model_item_added (parent->priv->children_observer, widget);
}
if (prev_parent == NULL)
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_PARENT]);
/* Enforce mapped invariants */
if (_gtk_widget_get_visible (priv->parent) &&
_gtk_widget_get_visible (widget))
{
if (_gtk_widget_get_child_visible (widget) &&
_gtk_widget_get_mapped (priv->parent))
gtk_widget_map (widget);
gtk_widget_queue_resize (priv->parent);
}
/* child may cause parent's expand to change, if the child is
* expanded. If child is not expanded, then it can't modify the
* parent's expand. If the child becomes expanded later then it will
* queue compute_expand then. This optimization plus defaulting
* newly-constructed widgets to need_compute_expand=FALSE should
* mean that initially building a widget tree doesn't have to keep
* walking up setting need_compute_expand on parents over and over.
*
* We can't change a parent to need to expand unless we're visible.
*/
if (_gtk_widget_get_visible (widget) &&
(priv->need_compute_expand ||
priv->computed_hexpand ||
priv->computed_vexpand))
{
gtk_widget_queue_compute_expand (parent);
}
if (prev_parent == NULL)
gtk_accessible_update_children (GTK_ACCESSIBLE (parent),
GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_CHILD_STATE_ADDED);
gtk_widget_pop_verify_invariants (widget);
}
/**
* gtk_widget_set_parent: (attributes org.gtk.Method.set_property=parent)
* @widget: a `GtkWidget`
* @parent: parent widget
*
* Sets @parent as the parent widget of @widget.
*
* This takes care of details such as updating the state and style
* of the child to reflect its new location and resizing the parent.
* The opposite function is [method@Gtk.Widget.unparent].
*
* This function is useful only when implementing subclasses of
* `GtkWidget`.
*/
void
gtk_widget_set_parent (GtkWidget *widget,
GtkWidget *parent)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_WIDGET (parent));
g_return_if_fail (_gtk_widget_get_parent (widget) == NULL);
gtk_widget_reposition_after (widget,
parent,
_gtk_widget_get_last_child (parent));
}
/**
* gtk_widget_get_parent: (attributes org.gtk.Method.get_property=parent)
* @widget: a `GtkWidget`
*
* Returns the parent widget of @widget.
*
* Returns: (transfer none) (nullable): the parent widget of @widget
*/
GtkWidget *
gtk_widget_get_parent (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->parent;
}
/**
* gtk_widget_get_root: (attributes org.gtk.Method.get_property=root)
* @widget: a `GtkWidget`
*
* Returns the `GtkRoot` widget of @widget.
*
* This function will return %NULL if the widget is not contained
* inside a widget tree with a root widget.
*
* `GtkRoot` widgets will return themselves here.
*
* Returns: (transfer none) (nullable): the root widget of @widget
*/
GtkRoot *
gtk_widget_get_root (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return _gtk_widget_get_root (widget);
}
/**
* gtk_widget_get_native:
* @widget: a `GtkWidget`
*
* Returns the nearest `GtkNative` ancestor of @widget.
*
* This function will return %NULL if the widget is not
* contained inside a widget tree with a native ancestor.
*
* `GtkNative` widgets will return themselves here.
*
* Returns: (transfer none) (nullable): the `GtkNative` ancestor of @widget
*/
GtkNative *
gtk_widget_get_native (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return (GtkNative *)gtk_widget_get_ancestor (widget, GTK_TYPE_NATIVE);
}
static void
gtk_widget_real_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction)
{
gtk_widget_queue_resize (widget);
}
#ifdef G_ENABLE_CONSISTENCY_CHECKS
/* Verify invariants, see docs/widget_system.txt for notes on much of
* this. Invariants may be temporarily broken while we’re in the
* process of updating state, of course, so you can only
* verify_invariants() after a given operation is complete.
* Use push/pop_verify_invariants to help with that.
*/
static void
gtk_widget_verify_invariants (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidget *parent;
if (priv->verifying_invariants_count > 0)
return;
parent = priv->parent;
if (priv->mapped)
{
/* Mapped implies ... */
if (!priv->realized)
g_warning ("%s %p is mapped but not realized",
gtk_widget_get_name (widget), widget);
if (!priv->visible)
g_warning ("%s %p is mapped but not visible",
gtk_widget_get_name (widget), widget);
if (!priv->child_visible && !GTK_IS_ROOT (widget))
g_warning ("%s %p is mapped but not child_visible",
gtk_widget_get_name (widget), widget);
}
else
{
/* Not mapped implies... */
#if 0
/* This check makes sense for normal toplevels, but for
* something like a toplevel that is embedded within a clutter
* state, mapping may depend on external factors.
*/
if (widget->priv->toplevel)
{
if (widget->priv->visible)
g_warning ("%s %p toplevel is visible but not mapped",
G_OBJECT_TYPE_NAME (widget), widget);
}
#endif
}
/* Parent related checks aren't possible if parent has
* verifying_invariants_count > 0 because parent needs to recurse
* children first before the invariants will hold.
*/
if (parent == NULL || parent->priv->verifying_invariants_count == 0)
{
if (parent &&
parent->priv->realized)
{
/* Parent realized implies... */
#if 0
/* This is in widget_system.txt but appears to fail
* because there's no gtk_container_realize() that
* realizes all children... instead we just lazily
* wait for map to fix things up.
*/
if (!widget->priv->realized)
g_warning ("%s %p is realized but child %s %p is not realized",
G_OBJECT_TYPE_NAME (parent), parent,
G_OBJECT_TYPE_NAME (widget), widget);
#endif
}
else if (priv->realized && !GTK_IS_ROOT (widget))
{
/* No parent or parent not realized on non-toplevel implies... */
g_warning ("%s %p is not realized but child %s %p is realized",
parent ? gtk_widget_get_name (parent) : "no parent", parent,
gtk_widget_get_name (widget), widget);
}
if (parent &&
parent->priv->mapped &&
priv->visible &&
priv->child_visible)
{
/* Parent mapped and we are visible implies... */
if (!priv->mapped)
g_warning ("%s %p is mapped but visible child %s %p is not mapped",
gtk_widget_get_name (parent), parent,
gtk_widget_get_name (widget), widget);
}
else if (priv->mapped && !GTK_IS_ROOT (widget))
{
/* No parent or parent not mapped on non-toplevel implies... */
g_warning ("%s %p is mapped but visible=%d child_visible=%d parent %s %p mapped=%d",
gtk_widget_get_name (widget), widget,
priv->visible,
priv->child_visible,
parent ? gtk_widget_get_name (parent) : "no parent", parent,
parent ? parent->priv->mapped : FALSE);
}
}
if (!priv->realized)
{
/* Not realized implies... */
#if 0
/* widget_system.txt says these hold, but they don't. */
if (widget->priv->alloc_needed)
g_warning ("%s %p alloc needed but not realized",
G_OBJECT_TYPE_NAME (widget), widget);
if (widget->priv->width_request_needed)
g_warning ("%s %p width request needed but not realized",
G_OBJECT_TYPE_NAME (widget), widget);
if (widget->priv->height_request_needed)
g_warning ("%s %p height request needed but not realized",
G_OBJECT_TYPE_NAME (widget), widget);
#endif
}
}
/* The point of this push/pop is that invariants may not hold while
* we’re busy making changes. So we only check at the outermost call
* on the call stack, after we finish updating everything.
*/
static void
gtk_widget_push_verify_invariants (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->verifying_invariants_count += 1;
}
static void
gtk_widget_pop_verify_invariants (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_assert (priv->verifying_invariants_count > 0);
priv->verifying_invariants_count -= 1;
if (priv->verifying_invariants_count == 0)
{
GtkWidget *child;
gtk_widget_verify_invariants (widget);
/* Check one level of children, because our
* push_verify_invariants() will have prevented some of the
* checks. This does not recurse because if recursion is
* needed, it will happen naturally as each child has a
* push/pop on that child. For example if we're recursively
* mapping children, we'll push/pop on each child as we map
* it.
*/
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
gtk_widget_verify_invariants (child);
}
}
}
#endif /* G_ENABLE_CONSISTENCY_CHECKS */
static PangoContext *
gtk_widget_peek_pango_context (GtkWidget *widget)
{
return g_object_get_qdata (G_OBJECT (widget), quark_pango_context);
}
/**
* gtk_widget_get_pango_context:
* @widget: a `GtkWidget`
*
* Gets a `PangoContext` with the appropriate font map, font description,
* and base direction for this widget.
*
* Unlike the context returned by [method@Gtk.Widget.create_pango_context],
* this context is owned by the widget (it can be used until the screen
* for the widget changes or the widget is removed from its toplevel),
* and will be updated to match any changes to the widget’s attributes.
* This can be tracked by listening to changes of the
* [property@Gtk.Widget:root] property on the widget.
*
* Returns: (transfer none): the `PangoContext` for the widget.
*/
PangoContext *
gtk_widget_get_pango_context (GtkWidget *widget)
{
PangoContext *context;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
context = g_object_get_qdata (G_OBJECT (widget), quark_pango_context);
if (!context)
{
context = gtk_widget_create_pango_context (GTK_WIDGET (widget));
g_object_set_qdata_full (G_OBJECT (widget),
quark_pango_context,
context,
g_object_unref);
}
return context;
}
static PangoFontMap *
gtk_widget_get_effective_font_map (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
PangoFontMap *font_map;
font_map = PANGO_FONT_MAP (g_object_get_qdata (G_OBJECT (widget), quark_font_map));
if (font_map)
return font_map;
else if (priv->parent)
return gtk_widget_get_effective_font_map (priv->parent);
else
return pango_cairo_font_map_get_default ();
}
gboolean
gtk_widget_update_pango_context (GtkWidget *widget,
PangoContext *context,
GtkTextDirection direction)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkCssStyle *style = gtk_css_node_get_style (priv->cssnode);
PangoFontDescription *font_desc;
GtkSettings *settings;
cairo_font_options_t *font_options;
guint old_serial;
gboolean hint_font_metrics = FALSE;
int scale;
old_serial = pango_context_get_serial (context);
font_desc = gtk_css_style_get_pango_font (style);
pango_context_set_font_description (context, font_desc);
pango_font_description_free (font_desc);
scale = gtk_widget_get_scale_factor (widget);
settings = gtk_widget_get_settings (widget);
if (settings != NULL &&
cairo_version () >= CAIRO_VERSION_ENCODE (1, 17, 4))
{
g_object_get (settings, "gtk-hint-font-metrics", &hint_font_metrics, NULL);
/* Override the user setting on non-HiDPI */
if (scale == 1)
hint_font_metrics = TRUE;
pango_context_set_round_glyph_positions (context, hint_font_metrics);
}
if (direction != GTK_TEXT_DIR_NONE)
pango_context_set_base_dir (context, direction == GTK_TEXT_DIR_LTR
? PANGO_DIRECTION_LTR
: PANGO_DIRECTION_RTL);
pango_cairo_context_set_resolution (context, _gtk_css_number_value_get (style->core->dpi, 100));
font_options = (cairo_font_options_t*)g_object_get_qdata (G_OBJECT (widget), quark_font_options);
if (settings && font_options)
{
cairo_font_options_t *options;
options = cairo_font_options_copy (gtk_settings_get_font_options (settings));
cairo_font_options_merge (options, font_options);
cairo_font_options_set_hint_metrics (options,
hint_font_metrics == 1 ? CAIRO_HINT_METRICS_ON
: CAIRO_HINT_METRICS_OFF);
pango_cairo_context_set_font_options (context, options);
cairo_font_options_destroy (options);
}
else if (settings)
{
cairo_font_options_t *options;
options = cairo_font_options_copy (gtk_settings_get_font_options (settings));
cairo_font_options_set_hint_metrics (options,
hint_font_metrics == 1 ? CAIRO_HINT_METRICS_ON
: CAIRO_HINT_METRICS_OFF);
pango_cairo_context_set_font_options (context, options);
cairo_font_options_destroy (options);
}
pango_context_set_font_map (context, gtk_widget_get_effective_font_map (widget));
return old_serial != pango_context_get_serial (context);
}
static void
gtk_widget_update_default_pango_context (GtkWidget *widget)
{
PangoContext *context = gtk_widget_peek_pango_context (widget);
if (!context)
return;
if (gtk_widget_update_pango_context (widget, context, _gtk_widget_get_direction (widget)))
gtk_widget_queue_resize (widget);
}
/**
* gtk_widget_set_font_options:
* @widget: a `GtkWidget`
* @options: (nullable): a `cairo_font_options_t`
* to unset any previously set default font options
*
* Sets the `cairo_font_options_t` used for Pango rendering
* in this widget.
*
* When not set, the default font options for the `GdkDisplay`
* will be used.
*/
void
gtk_widget_set_font_options (GtkWidget *widget,
const cairo_font_options_t *options)
{
cairo_font_options_t *font_options;
g_return_if_fail (GTK_IS_WIDGET (widget));
font_options = (cairo_font_options_t *)g_object_get_qdata (G_OBJECT (widget), quark_font_options);
if (font_options != options)
{
g_object_set_qdata_full (G_OBJECT (widget),
quark_font_options,
options ? cairo_font_options_copy (options) : NULL,
(GDestroyNotify)cairo_font_options_destroy);
gtk_widget_update_default_pango_context (widget);
}
}
/**
* gtk_widget_get_font_options:
* @widget: a `GtkWidget`
*
* Returns the `cairo_font_options_t` of widget.
*
* Seee [method@Gtk.Widget.set_font_options].
*
* Returns: (transfer none) (nullable): the `cairo_font_options_t`
* of widget
*/
const cairo_font_options_t *
gtk_widget_get_font_options (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return (cairo_font_options_t *)g_object_get_qdata (G_OBJECT (widget), quark_font_options);
}
static void
gtk_widget_set_font_map_recurse (GtkWidget *widget, gpointer user_data)
{
if (g_object_get_qdata (G_OBJECT (widget), quark_font_map))
return;
gtk_widget_update_default_pango_context (widget);
gtk_widget_forall (widget, gtk_widget_set_font_map_recurse, user_data);
}
/**
* gtk_widget_set_font_map:
* @widget: a `GtkWidget`
* @font_map: (nullable): a `PangoFontMap`, or %NULL to unset any
* previously set font map
*
* Sets the font map to use for Pango rendering.
*
* The font map is the object that is used to look up fonts.
* Setting a custom font map can be useful in special situations,
* e.g. when you need to add application-specific fonts to the set
* of available fonts.
*
* When not set, the widget will inherit the font map from its parent.
*/
void
gtk_widget_set_font_map (GtkWidget *widget,
PangoFontMap *font_map)
{
PangoFontMap *map;
g_return_if_fail (GTK_IS_WIDGET (widget));
map = PANGO_FONT_MAP (g_object_get_qdata (G_OBJECT (widget), quark_font_map));
if (map == font_map)
return;
g_object_set_qdata_full (G_OBJECT (widget),
quark_font_map,
g_object_ref (font_map),
g_object_unref);
gtk_widget_update_default_pango_context (widget);
gtk_widget_forall (widget, gtk_widget_set_font_map_recurse, NULL);
}
/**
* gtk_widget_get_font_map:
* @widget: a `GtkWidget`
*
* Gets the font map of @widget.
*
* See [method@Gtk.Widget.set_font_map].
*
* Returns: (transfer none) (nullable): A `PangoFontMap`
*/
PangoFontMap *
gtk_widget_get_font_map (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return PANGO_FONT_MAP (g_object_get_qdata (G_OBJECT (widget), quark_font_map));
}
/**
* gtk_widget_create_pango_context:
* @widget: a `GtkWidget`
*
* Creates a new `PangoContext` with the appropriate font map,
* font options, font description, and base direction for drawing
* text for this widget.
*
* See also [method@Gtk.Widget.get_pango_context].
*
* Returns: (transfer full): the new `PangoContext`
*/
PangoContext *
gtk_widget_create_pango_context (GtkWidget *widget)
{
PangoContext *context;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
context = pango_font_map_create_context (pango_cairo_font_map_get_default ());
gtk_widget_update_pango_context (widget, context, _gtk_widget_get_direction (widget));
pango_context_set_language (context, gtk_get_default_language ());
return context;
}
/**
* gtk_widget_create_pango_layout:
* @widget: a `GtkWidget`
* @text: (nullable): text to set on the layout
*
* Creates a new `PangoLayout` with the appropriate font map,
* font description, and base direction for drawing text for
* this widget.
*
* If you keep a `PangoLayout` created in this way around,
* you need to re-create it when the widget `PangoContext`
* is replaced. This can be tracked by listening to changes
* of the [property@Gtk.Widget:root] property on the widget.
*
* Returns: (transfer full): the new `PangoLayout`
**/
PangoLayout *
gtk_widget_create_pango_layout (GtkWidget *widget,
const char *text)
{
PangoLayout *layout;
PangoContext *context;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
context = gtk_widget_get_pango_context (widget);
layout = pango_layout_new (context);
if (text)
pango_layout_set_text (layout, text, -1);
return layout;
}
/**
* gtk_widget_set_child_visible:
* @widget: a `GtkWidget`
* @child_visible: if %TRUE, @widget should be mapped along
* with its parent.
*
* Sets whether @widget should be mapped along with its parent.
*
* The child visibility can be set for widget before it is added
* to a container with [method@Gtk.Widget.set_parent], to avoid
* mapping children unnecessary before immediately unmapping them.
* However it will be reset to its default state of %TRUE when the
* widget is removed from a container.
*
* Note that changing the child visibility of a widget does not
* queue a resize on the widget. Most of the time, the size of
* a widget is computed from all visible children, whether or
* not they are mapped. If this is not the case, the container
* can queue a resize itself.
*
* This function is only useful for container implementations
* and should never be called by an application.
*/
void
gtk_widget_set_child_visible (GtkWidget *widget,
gboolean child_visible)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (!GTK_IS_ROOT (widget));
child_visible = !!child_visible;
if (priv->child_visible == child_visible)
return;
g_object_ref (widget);
gtk_widget_verify_invariants (widget);
if (child_visible)
priv->child_visible = TRUE;
else
{
GtkRoot *root;
priv->child_visible = FALSE;
root = _gtk_widget_get_root (widget);
if (GTK_WIDGET (root) != widget && GTK_IS_WINDOW (root))
_gtk_window_unset_focus_and_default (GTK_WINDOW (root), widget);
}
if (priv->parent && _gtk_widget_get_realized (priv->parent))
{
if (_gtk_widget_get_mapped (priv->parent) &&
priv->child_visible &&
_gtk_widget_get_visible (widget))
gtk_widget_map (widget);
else
gtk_widget_unmap (widget);
}
gtk_widget_verify_invariants (widget);
g_object_unref (widget);
}
/**
* gtk_widget_get_child_visible:
* @widget: a `GtkWidget`
*
* Gets the value set with gtk_widget_set_child_visible().
*
* If you feel a need to use this function, your code probably
* needs reorganization.
*
* This function is only useful for container implementations
* and should never be called by an application.
*
* Returns: %TRUE if the widget is mapped with the parent.
*/
gboolean
gtk_widget_get_child_visible (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->child_visible;
}
void
_gtk_widget_scale_changed (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (priv->context)
gtk_style_context_set_scale (priv->context, gtk_widget_get_scale_factor (widget));
G_GNUC_END_IGNORE_DEPRECATIONS
gtk_widget_update_default_pango_context (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_SCALE_FACTOR]);
gtk_widget_forall (widget, (GtkCallback)_gtk_widget_scale_changed, NULL);
}
/**
* gtk_widget_get_scale_factor: (attributes org.gtk.Method.get_property=scale-factor)
* @widget: a `GtkWidget`
*
* Retrieves the internal scale factor that maps from window
* coordinates to the actual device pixels.
*
* On traditional systems this is 1, on high density outputs,
* it can be a higher value (typically 2).
*
* See [method@Gdk.Surface.get_scale_factor].
*
* Returns: the scale factor for @widget
*/
int
gtk_widget_get_scale_factor (GtkWidget *widget)
{
GtkWidget *root;
GdkDisplay *display;
GdkMonitor *monitor;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 1);
if (_gtk_widget_get_realized (widget))
{
GdkSurface *surface = gtk_widget_get_surface (widget);
if (surface)
return gdk_surface_get_scale_factor (surface);
}
root = (GtkWidget *)_gtk_widget_get_root (widget);
if (root && root != widget)
return gtk_widget_get_scale_factor (root);
/* else fall back to something that is more likely to be right than
* just returning 1:
*/
display = _gtk_widget_get_display (widget);
if (display)
{
monitor = g_list_model_get_item (gdk_display_get_monitors (display), 0);
if (monitor)
{
int result = gdk_monitor_get_scale_factor (monitor);
g_object_unref (monitor);
return result;
}
}
return 1;
}
/**
* gtk_widget_get_display:
* @widget: a `GtkWidget`
*
* Get the `GdkDisplay` for the toplevel window associated with
* this widget.
*
* This function can only be called after the widget has been
* added to a widget hierarchy with a `GtkWindow` at the top.
*
* In general, you should only create display specific
* resources when a widget has been realized, and you should
* free those resources when the widget is unrealized.
*
* Returns: (transfer none): the `GdkDisplay` for the toplevel
* for this widget.
*/
GdkDisplay *
gtk_widget_get_display (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return _gtk_widget_get_display (widget);
}
/**
* gtk_widget_child_focus:
* @widget: a `GtkWidget`
* @direction: direction of focus movement
*
* Called by widgets as the user moves around the window using
* keyboard shortcuts.
*
* The @direction argument indicates what kind of motion is taking place (up,
* down, left, right, tab forward, tab backward).
*
* This function calls the [vfunc@Gtk.Widget.focus] virtual function; widgets
* can override the virtual function in order to implement appropriate focus
* behavior.
*
* The default `focus()` virtual function for a widget should return `TRUE` if
* moving in @direction left the focus on a focusable location inside that
* widget, and `FALSE` if moving in @direction moved the focus outside the
* widget. When returning `TRUE`, widgets normally call [method@Gtk.Widget.grab_focus]
* to place the focus accordingly; when returning `FALSE`, they don’t modify
* the current focus location.
*
* This function is used by custom widget implementations; if you're
* writing an app, you’d use [method@Gtk.Widget.grab_focus] to move
* the focus to a particular widget.
*
* Returns: %TRUE if focus ended up inside @widget
*/
gboolean
gtk_widget_child_focus (GtkWidget *widget,
GtkDirectionType direction)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (!_gtk_widget_get_visible (widget) ||
!gtk_widget_is_sensitive (widget) ||
!gtk_widget_get_can_focus (widget))
return FALSE;
/* Emit ::focus in any case, even if focusable is FALSE,
* since any widget might have child widgets that will take
* focus
*/
return GTK_WIDGET_GET_CLASS (widget)->focus (widget, direction);
}
/**
* gtk_widget_keynav_failed:
* @widget: a `GtkWidget`
* @direction: direction of focus movement
*
* Emits the `::keynav-failed` signal on the widget.
*
* This function should be called whenever keyboard navigation
* within a single widget hits a boundary.
*
* The return value of this function should be interpreted
* in a way similar to the return value of
* [method@Gtk.Widget.child_focus]. When %TRUE is returned,
* stay in the widget, the failed keyboard navigation is OK
* and/or there is nowhere we can/should move the focus to.
* When %FALSE is returned, the caller should continue with
* keyboard navigation outside the widget, e.g. by calling
* [method@Gtk.Widget.child_focus] on the widget’s toplevel.
*
* The default [signal@Gtk.Widget::keynav-failed] handler returns
* %FALSE for %GTK_DIR_TAB_FORWARD and %GTK_DIR_TAB_BACKWARD.
* For the other values of `GtkDirectionType` it returns %TRUE.
*
* Whenever the default handler returns %TRUE, it also calls
* [method@Gtk.Widget.error_bell] to notify the user of the
* failed keyboard navigation.
*
* A use case for providing an own implementation of ::keynav-failed
* (either by connecting to it or by overriding it) would be a row of
* [class@Gtk.Entry] widgets where the user should be able to navigate
* the entire row with the cursor keys, as e.g. known from user
* interfaces that require entering license keys.
*
* Returns: %TRUE if stopping keyboard navigation is fine, %FALSE
* if the emitting widget should try to handle the keyboard
* navigation attempt in its parent container(s).
*/
gboolean
gtk_widget_keynav_failed (GtkWidget *widget,
GtkDirectionType direction)
{
gboolean return_val;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_signal_emit (widget, widget_signals[KEYNAV_FAILED], 0,
direction, &return_val);
return return_val;
}
/**
* gtk_widget_error_bell:
* @widget: a `GtkWidget`
*
* Notifies the user about an input-related error on this widget.
*
* If the [property@Gtk.Settings:gtk-error-bell] setting is %TRUE,
* it calls [method@Gdk.Surface.beep], otherwise it does nothing.
*
* Note that the effect of [method@Gdk.Surface.beep] can be configured
* in many ways, depending on the windowing backend and the desktop
* environment or window manager that is used.
*/
void
gtk_widget_error_bell (GtkWidget *widget)
{
GtkSettings* settings;
gboolean beep;
GdkSurface *surface;
g_return_if_fail (GTK_IS_WIDGET (widget));
settings = gtk_widget_get_settings (widget);
if (!settings)
return;
surface = gtk_widget_get_surface (widget);
g_object_get (settings,
"gtk-error-bell", &beep,
NULL);
if (beep && surface)
gdk_surface_beep (surface);
}
static void
gtk_widget_set_usize_internal (GtkWidget *widget,
int width,
int height)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
gboolean changed = FALSE;
g_object_freeze_notify (G_OBJECT (widget));
if (width > -2 && priv->width_request != width)
{
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_WIDTH_REQUEST]);
priv->width_request = width;
changed = TRUE;
}
if (height > -2 && priv->height_request != height)
{
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_HEIGHT_REQUEST]);
priv->height_request = height;
changed = TRUE;
}
if (_gtk_widget_get_visible (widget) && changed)
{
gtk_widget_queue_resize (widget);
}
g_object_thaw_notify (G_OBJECT (widget));
}
/**
* gtk_widget_set_size_request:
* @widget: a `GtkWidget`
* @width: width @widget should request, or -1 to unset
* @height: height @widget should request, or -1 to unset
*
* Sets the minimum size of a widget.
*
* That is, the widget’s size request will be at least @width
* by @height. You can use this function to force a widget to
* be larger than it normally would be.
*
* In most cases, [method@Gtk.Window.set_default_size] is a better
* choice for toplevel windows than this function; setting the default
* size will still allow users to shrink the window. Setting the size
* request will force them to leave the window at least as large as
* the size request.
*
* Note the inherent danger of setting any fixed size - themes,
* translations into other languages, different fonts, and user action
* can all change the appropriate size for a given widget. So, it's
* basically impossible to hardcode a size that will always be
* correct.
*
* The size request of a widget is the smallest size a widget can
* accept while still functioning well and drawing itself correctly.
* However in some strange cases a widget may be allocated less than
* its requested size, and in many cases a widget may be allocated more
* space than it requested.
*
* If the size request in a given direction is -1 (unset), then
* the “natural” size request of the widget will be used instead.
*
* The size request set here does not include any margin from the
* properties
* [property@Gtk.Widget:margin-start],
* [property@Gtk.Widget:margin-end],
* [property@Gtk.Widget:margin-top], and
* [property@Gtk.Widget:margin-bottom], but it does include pretty
* much all other padding or border properties set by any subclass
* of `GtkWidget`.
*/
void
gtk_widget_set_size_request (GtkWidget *widget,
int width,
int height)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (width >= -1);
g_return_if_fail (height >= -1);
gtk_widget_set_usize_internal (widget, width, height);
}
/**
* gtk_widget_get_size_request:
* @widget: a `GtkWidget`
* @width: (out) (optional): return location for width
* @height: (out) (optional): return location for height
*
* Gets the size request that was explicitly set for the widget using
* gtk_widget_set_size_request().
*
* A value of -1 stored in @width or @height indicates that that
* dimension has not been set explicitly and the natural requisition
* of the widget will be used instead. See
* [method@Gtk.Widget.set_size_request]. To get the size a widget will
* actually request, call [method@Gtk.Widget.measure] instead of
* this function.
*/
void
gtk_widget_get_size_request (GtkWidget *widget,
int *width,
int *height)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (width)
*width = priv->width_request;
if (height)
*height = priv->height_request;
}
/*< private >
* gtk_widget_has_size_request:
* @widget: a `GtkWidget`
*
* Returns if the widget has a size request set (anything besides -1 for height
* or width)
*/
gboolean
gtk_widget_has_size_request (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
return !(priv->width_request == -1 && priv->height_request == -1);
}
/**
* gtk_widget_get_ancestor:
* @widget: a `GtkWidget`
* @widget_type: ancestor type
*
* Gets the first ancestor of @widget with type @widget_type.
*
* For example, `gtk_widget_get_ancestor (widget, GTK_TYPE_BOX)`
* gets the first `GtkBox` that’s an ancestor of @widget. No
* reference will be added to the returned widget; it should
* not be unreferenced.
*
* Note that unlike [method@Gtk.Widget.is_ancestor], this function
* considers @widget to be an ancestor of itself.
*
* Returns: (transfer none) (nullable): the ancestor widget
*/
GtkWidget*
gtk_widget_get_ancestor (GtkWidget *widget,
GType widget_type)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
while (widget && !g_type_is_a (G_OBJECT_TYPE (widget), widget_type))
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
widget = priv->parent;
}
return widget;
}
/**
* gtk_widget_get_settings:
* @widget: a `GtkWidget`
*
* Gets the settings object holding the settings used for this widget.
*
* Note that this function can only be called when the `GtkWidget`
* is attached to a toplevel, since the settings object is specific
* to a particular `GdkDisplay`. If you want to monitor the widget for
* changes in its settings, connect to the `notify::display` signal.
*
* Returns: (transfer none): the relevant `GtkSettings` object
*/
GtkSettings*
gtk_widget_get_settings (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return gtk_settings_get_for_display (_gtk_widget_get_display (widget));
}
/**
* gtk_widget_is_ancestor:
* @widget: a `GtkWidget`
* @ancestor: another `GtkWidget`
*
* Determines whether @widget is somewhere inside @ancestor,
* possibly with intermediate containers.
*
* Returns: %TRUE if @ancestor contains @widget as a child,
* grandchild, great grandchild, etc.
*/
gboolean
gtk_widget_is_ancestor (GtkWidget *widget,
GtkWidget *ancestor)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (ancestor != NULL, FALSE);
while (widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->parent == ancestor)
return TRUE;
widget = priv->parent;
}
return FALSE;
}
static void
gtk_widget_emit_direction_changed (GtkWidget *widget,
GtkTextDirection old_dir)
{
GtkTextDirection direction;
GtkStateFlags state;
gtk_widget_update_default_pango_context (widget);
direction = _gtk_widget_get_direction (widget);
switch (direction)
{
case GTK_TEXT_DIR_LTR:
state = GTK_STATE_FLAG_DIR_LTR;
break;
case GTK_TEXT_DIR_RTL:
state = GTK_STATE_FLAG_DIR_RTL;
break;
case GTK_TEXT_DIR_NONE:
default:
g_assert_not_reached ();
break;
}
gtk_widget_update_state_flags (widget,
state,
state ^ (GTK_STATE_FLAG_DIR_LTR | GTK_STATE_FLAG_DIR_RTL));
g_signal_emit (widget, widget_signals[DIRECTION_CHANGED], 0, old_dir);
}
/**
* gtk_widget_set_direction:
* @widget: a `GtkWidget`
* @dir: the new direction
*
* Sets the reading direction on a particular widget.
*
* This direction controls the primary direction for widgets
* containing text, and also the direction in which the children
* of a container are packed. The ability to set the direction is
* present in order so that correct localization into languages with
* right-to-left reading directions can be done. Generally, applications
* will let the default reading direction present, except for containers
* where the containers are arranged in an order that is explicitly
* visual rather than logical (such as buttons for text justification).
*
* If the direction is set to %GTK_TEXT_DIR_NONE, then the value
* set by [func@Gtk.Widget.set_default_direction] will be used.
*/
void
gtk_widget_set_direction (GtkWidget *widget,
GtkTextDirection dir)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkTextDirection old_dir;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (dir >= GTK_TEXT_DIR_NONE && dir <= GTK_TEXT_DIR_RTL);
old_dir = _gtk_widget_get_direction (widget);
priv->direction = dir;
if (old_dir != _gtk_widget_get_direction (widget))
gtk_widget_emit_direction_changed (widget, old_dir);
}
/**
* gtk_widget_get_direction:
* @widget: a `GtkWidget`
*
* Gets the reading direction for a particular widget.
*
* See [method@Gtk.Widget.set_direction].
*
* Returns: the reading direction for the widget.
*/
GtkTextDirection
gtk_widget_get_direction (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), GTK_TEXT_DIR_LTR);
if (priv->direction == GTK_TEXT_DIR_NONE)
return gtk_default_direction;
else
return priv->direction;
}
static void
gtk_widget_set_default_direction_recurse (GtkWidget *widget,
GtkTextDirection old_dir)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidget *child;
g_object_ref (widget);
if (priv->direction == GTK_TEXT_DIR_NONE)
gtk_widget_emit_direction_changed (widget, old_dir);
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
gtk_widget_set_default_direction_recurse (child, old_dir);
}
g_object_unref (widget);
}
/**
* gtk_widget_set_default_direction:
* @dir: the new default direction. This cannot be %GTK_TEXT_DIR_NONE.
*
* Sets the default reading direction for widgets.
*
* See [method@Gtk.Widget.set_direction].
*/
void
gtk_widget_set_default_direction (GtkTextDirection dir)
{
g_return_if_fail (dir == GTK_TEXT_DIR_RTL || dir == GTK_TEXT_DIR_LTR);
if (dir != gtk_default_direction)
{
GList *toplevels, *tmp_list;
GtkTextDirection old_dir = gtk_default_direction;
gtk_default_direction = dir;
tmp_list = toplevels = gtk_window_list_toplevels ();
g_list_foreach (toplevels, (GFunc)g_object_ref, NULL);
while (tmp_list)
{
gtk_widget_set_default_direction_recurse (tmp_list->data, old_dir);
g_object_unref (tmp_list->data);
tmp_list = tmp_list->next;
}
g_list_free (toplevels);
}
}
/**
* gtk_widget_get_default_direction:
*
* Obtains the current default reading direction.
*
* See [func@Gtk.Widget.set_default_direction].
*
* Returns: the current default direction.
*/
GtkTextDirection
gtk_widget_get_default_direction (void)
{
return gtk_default_direction;
}
static void
gtk_widget_dispose (GObject *object)
{
GtkWidget *widget = GTK_WIDGET (object);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GSList *sizegroups;
if (priv->muxer != NULL)
g_object_run_dispose (G_OBJECT (priv->muxer));
if (priv->children_observer)
gtk_list_list_model_clear (priv->children_observer);
if (priv->controller_observer)
gtk_list_list_model_clear (priv->controller_observer);
if (priv->parent)
{
g_critical ("%s %p has a parent %s %p during dispose. Parents hold a reference, so this should not happen.\n"
"Did you call g_object_unref() instead of gtk_widget_unparent()?",
G_OBJECT_TYPE_NAME (widget), widget,
G_OBJECT_TYPE_NAME (priv->parent), priv->parent);
priv->parent = NULL;
}
while (priv->paintables)
gtk_widget_paintable_set_widget (priv->paintables->data, NULL);
if (priv->layout_manager != NULL)
gtk_layout_manager_set_widget (priv->layout_manager, NULL);
g_clear_object (&priv->layout_manager);
priv->visible = FALSE;
if (_gtk_widget_get_realized (widget))
gtk_widget_unrealize (widget);
g_clear_object (&priv->cursor);
if (!priv->in_destruction)
{
priv->in_destruction = TRUE;
g_signal_emit (object, widget_signals[DESTROY], 0);
priv->in_destruction = FALSE;
gtk_widget_real_destroy (widget);
}
sizegroups = _gtk_widget_get_sizegroups (widget);
while (sizegroups)
{
GtkSizeGroup *size_group;
size_group = sizegroups->data;
sizegroups = sizegroups->next;
gtk_size_group_remove_widget (size_group, widget);
}
if (priv->at_context != NULL)
{
gtk_at_context_unrealize (priv->at_context);
g_clear_object (&priv->at_context);
}
g_clear_object (&priv->muxer);
G_OBJECT_CLASS (gtk_widget_parent_class)->dispose (object);
}
#ifdef G_ENABLE_CONSISTENCY_CHECKS
typedef struct {
AutomaticChildClass *child_class;
GType widget_type;
GObject *object;
gboolean did_finalize;
} FinalizeAssertion;
static void
finalize_assertion_weak_ref (gpointer data,
GObject *where_the_object_was)
{
FinalizeAssertion *assertion = (FinalizeAssertion *)data;
assertion->did_finalize = TRUE;
}
#endif /* G_ENABLE_CONSISTENCY_CHECKS */
static void
gtk_widget_real_destroy (GtkWidget *object)
{
GtkWidget *widget = GTK_WIDGET (object);
if (g_object_get_qdata (G_OBJECT (widget), quark_auto_children))
{
GtkWidgetClass *class;
GSList *l;
GHashTable *auto_children;
#ifdef G_ENABLE_CONSISTENCY_CHECKS
GSList *assertions = NULL;
/* Note, GTK_WIDGET_ASSERT_COMPONENTS is very useful
* to catch ref counting bugs, but can only be used in
* test cases which simply create and destroy a composite
* widget.
*
* This is because some API can expose components explicitly,
* and so we cannot assert that a component is expected to finalize
* in a full application ecosystem.
*/
if (g_getenv ("GTK_WIDGET_ASSERT_COMPONENTS") != NULL)
{
GType class_type;
for (class = GTK_WIDGET_GET_CLASS (widget);
GTK_IS_WIDGET_CLASS (class);
class = g_type_class_peek_parent (class))
{
if (!class->priv->template)
continue;
class_type = G_OBJECT_CLASS_TYPE (class);
for (l = class->priv->template->children; l; l = l->next)
{
AutomaticChildClass *child_class = l->data;
GObject *child_object = gtk_widget_get_template_child (widget,
class_type,
child_class->name);
if (G_IS_OBJECT (child_object))
{
FinalizeAssertion *assertion = g_new0 (FinalizeAssertion, 1);
assertion->child_class = child_class;
assertion->widget_type = class_type;
assertion->object = child_object;
g_object_weak_ref (child_object, finalize_assertion_weak_ref, assertion);
assertions = g_slist_prepend (assertions, assertion);
}
}
}
}
#endif /* G_ENABLE_CONSISTENCY_CHECKS */
/* Prepare to release references to all automated children */
auto_children = g_object_steal_qdata (G_OBJECT (widget), quark_auto_children);
/* Set any automatic private data pointers to NULL and release child references */
for (class = GTK_WIDGET_GET_CLASS (widget);
GTK_IS_WIDGET_CLASS (class);
class = g_type_class_peek_parent (class))
{
GHashTable *auto_child_hash = NULL;
if (!class->priv->template)
continue;
if (auto_children)
{
GType type = G_TYPE_FROM_CLASS (class);
g_hash_table_steal_extended (auto_children,
GSIZE_TO_POINTER (type),
NULL,
(gpointer *) &auto_child_hash);
}
for (l = class->priv->template->children; l; l = l->next)
{
AutomaticChildClass *child_class = l->data;
if (child_class->offset != 0)
{
gpointer field_p;
/* Nullify instance private data for internal children */
field_p = G_STRUCT_MEMBER_P (widget, child_class->offset);
(* (gpointer *) field_p) = NULL;
}
/* Release the references in order after setting the pointer to NULL */
if (auto_child_hash)
g_hash_table_remove (auto_child_hash, child_class->name);
}
g_clear_pointer (&auto_child_hash, g_hash_table_unref);
}
/* Free the child reference hash table */
g_clear_pointer (&auto_children, g_hash_table_unref);
#ifdef G_ENABLE_CONSISTENCY_CHECKS
for (l = assertions; l; l = l->next)
{
FinalizeAssertion *assertion = l->data;
if (!assertion->did_finalize)
g_critical ("Automated component '%s' of class '%s' did not finalize in dispose()"
"Current reference count is %d",
assertion->child_class->name,
g_type_name (assertion->widget_type),
assertion->object->ref_count);
g_free (assertion);
}
g_slist_free (assertions);
#endif /* G_ENABLE_CONSISTENCY_CHECKS */
}
/* Callers of add_mnemonic_label() should disconnect on ::destroy */
g_object_set_qdata (G_OBJECT (widget), quark_mnemonic_labels, NULL);
gtk_grab_remove (widget);
destroy_tick_callbacks (widget);
destroy_surface_transform_data (widget);
}
static void
gtk_widget_finalize (GObject *object)
{
GtkWidget *widget = GTK_WIDGET (object);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
gtk_grab_remove (widget);
g_free (priv->name);
g_free (priv->tooltip_markup);
g_free (priv->tooltip_text);
g_clear_pointer (&priv->transform, gsk_transform_unref);
g_clear_pointer (&priv->allocated_transform, gsk_transform_unref);
gtk_css_widget_node_widget_destroyed (GTK_CSS_WIDGET_NODE (priv->cssnode));
g_object_unref (priv->cssnode);
g_clear_object (&priv->context);
g_clear_object (&priv->at_context);
_gtk_size_request_cache_free (&priv->requests);
l = priv->event_controllers;
while (l)
{
GList *next = l->next;
GtkEventController *controller = l->data;
if (controller)
gtk_widget_remove_controller (widget, controller);
l = next;
}
g_assert (priv->event_controllers == NULL);
if (_gtk_widget_get_first_child (widget) != NULL)
{
GtkWidget *child;
GString *s;
s = g_string_new (NULL);
g_string_append_printf (s, "Finalizing %s %p, but it still has children left:",
gtk_widget_get_name (widget), widget);
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
g_string_append_printf (s, "\n - %s %p",
gtk_widget_get_name (child), child);
}
g_warning ("%s", s->str);
g_string_free (s, TRUE);
}
if (g_object_is_floating (object))
g_warning ("A floating object was finalized. This means that someone\n"
"called g_object_unref() on an object that had only a floating\n"
"reference; the initial floating reference is not owned by anyone\n"
"and must be removed with g_object_ref_sink().");
G_OBJECT_CLASS (gtk_widget_parent_class)->finalize (object);
}
static void
gtk_widget_real_map (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_assert (_gtk_widget_get_realized (widget));
if (!_gtk_widget_get_mapped (widget))
{
GtkWidget *p;
priv->mapped = TRUE;
for (p = gtk_widget_get_first_child (widget);
p != NULL;
p = gtk_widget_get_next_sibling (p))
{
if (_gtk_widget_get_visible (p) &&
_gtk_widget_get_child_visible (p) &&
!_gtk_widget_get_mapped (p))
gtk_widget_map (p);
}
}
}
static void
gtk_widget_real_unmap (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (_gtk_widget_get_mapped (widget))
{
GtkWidget *child;
priv->mapped = FALSE;
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
gtk_widget_unmap (child);
}
gtk_widget_update_paintables (widget);
gtk_widget_unset_state_flags (widget,
GTK_STATE_FLAG_PRELIGHT |
GTK_STATE_FLAG_ACTIVE);
}
}
static void
gtk_widget_real_realize (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->realized = TRUE;
/* Connect frame clock */
if (priv->tick_callbacks != NULL && !priv->clock_tick_id)
{
GdkFrameClock *frame_clock = gtk_widget_get_frame_clock (widget);
priv->clock_tick_id = g_signal_connect (frame_clock, "update",
G_CALLBACK (gtk_widget_on_frame_clock_update),
widget);
gdk_frame_clock_begin_updating (frame_clock);
}
gtk_css_node_invalidate_frame_clock (priv->cssnode, FALSE);
}
static void
gtk_widget_real_unrealize (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_assert (!priv->mapped);
/* We must do unrealize child widget BEFORE container widget.
* gdk_surface_destroy() destroys specified xwindow and its sub-xwindows.
* So, unrealizing container widget before its children causes the problem
* (for example, gdk_ic_destroy () with destroyed window causes crash.)
*/
gtk_widget_forall (widget, (GtkCallback)gtk_widget_unrealize, NULL);
/* Disconnect frame clock */
gtk_css_node_invalidate_frame_clock (priv->cssnode, FALSE);
if (priv->clock_tick_id)
{
GdkFrameClock *frame_clock = gtk_widget_get_frame_clock (widget);
g_signal_handler_disconnect (frame_clock, priv->clock_tick_id);
priv->clock_tick_id = 0;
gdk_frame_clock_end_updating (frame_clock);
}
priv->realized = FALSE;
}
void
gtk_widget_adjust_size_request (GtkWidget *widget,
GtkOrientation orientation,
int *minimum_size,
int *natural_size)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (orientation == GTK_ORIENTATION_HORIZONTAL && priv->width_request > 0)
*minimum_size = MAX (*minimum_size, priv->width_request);
else if (orientation == GTK_ORIENTATION_VERTICAL && priv->height_request > 0)
*minimum_size = MAX (*minimum_size, priv->height_request);
/* Fix it if set_size_request made natural size smaller than min size.
* This would also silently fix broken widgets, but we warn about them
* in gtksizerequest.c when calling their size request vfuncs.
*/
*natural_size = MAX (*natural_size, *minimum_size);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
*minimum_size += priv->margin.left + priv->margin.right;
*natural_size += priv->margin.left + priv->margin.right;
}
else
{
*minimum_size += priv->margin.top + priv->margin.bottom;
*natural_size += priv->margin.top + priv->margin.bottom;
}
}
void
gtk_widget_adjust_baseline_request (GtkWidget *widget,
int *minimum_baseline,
int *natural_baseline)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->height_request >= 0)
{
/* No baseline support for explicitly set height */
*minimum_baseline = -1;
*natural_baseline = -1;
}
else
{
*minimum_baseline += priv->margin.top;
*natural_baseline += priv->margin.top;
}
}
/*
* _gtk_widget_list_devices:
* @widget: a `GtkWidget`
*
* Returns the list of pointer `GdkDevice`s that are currently
* on top of @widget. Free the list
* with g_free(), the elements are owned by GTK and must
* not be freed.
*/
static GdkDevice **
_gtk_widget_list_devices (GtkWidget *widget,
guint *out_n_devices)
{
GtkRoot *root;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_assert (out_n_devices);
if (!_gtk_widget_get_mapped (widget))
{
*out_n_devices = 0;
return NULL;
}
root = gtk_widget_get_root (widget);
if (!GTK_IS_WINDOW (root))
{
*out_n_devices = 0;
return NULL;
}
return gtk_window_get_foci_on_widget (GTK_WINDOW (root),
widget, out_n_devices);
}
/*
* _gtk_widget_synthesize_crossing:
* @from: the `GtkWidget` the virtual pointer is leaving.
* @to: the `GtkWidget` the virtual pointer is moving to.
* @mode: the `GdkCrossingMode` to place on the synthesized events.
*
* Generate crossing event(s) on widget state (sensitivity) or GTK grab change.
*/
void
_gtk_widget_synthesize_crossing (GtkWidget *from,
GtkWidget *to,
GdkDevice *device,
GdkCrossingMode mode)
{
GdkSurface *from_surface = NULL, *to_surface = NULL;
GtkCrossingData crossing;
double x, y;
g_return_if_fail (from != NULL || to != NULL);
crossing.type = GTK_CROSSING_POINTER;
crossing.mode = mode;
crossing.old_target = from;
crossing.old_descendent = NULL;
crossing.new_target = to;
crossing.new_descendent = NULL;
if (from)
{
crossing.direction = GTK_CROSSING_OUT;
from_surface = gtk_widget_get_surface (from);
gdk_surface_get_device_position (from_surface, device, &x, &y, NULL);
gtk_widget_handle_crossing (from, &crossing, x, y);
}
if (to)
{
to_surface = gtk_widget_get_surface (to);
crossing.direction = GTK_CROSSING_IN;
gdk_surface_get_device_position (to_surface, device, &x, &y, NULL);
gtk_widget_handle_crossing (to, &crossing, x, y);
}
}
static void
gtk_widget_propagate_state (GtkWidget *widget,
const GtkStateData *data)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkStateFlags new_flags, old_flags = priv->state_flags;
GtkStateData child_data;
GtkWidget *child;
int new_scale_factor = gtk_widget_get_scale_factor (widget);
priv->state_flags |= data->flags_to_set;
priv->state_flags &= ~(data->flags_to_unset);
/* make insensitivity unoverridable */
if (!priv->sensitive)
priv->state_flags |= GTK_STATE_FLAG_INSENSITIVE;
if (gtk_widget_is_focus (widget) && !gtk_widget_is_sensitive (widget))
gtk_root_set_focus (priv->root, NULL);
new_flags = priv->state_flags;
if (data->old_scale_factor != new_scale_factor)
_gtk_widget_scale_changed (widget);
if (old_flags != new_flags)
{
GtkRoot *root;
GtkWidget *grab = NULL;
gboolean shadowed;
g_object_ref (widget);
root = gtk_widget_get_root (widget);
if (GTK_IS_WINDOW (root))
{
GtkWindowGroup *window_group;
window_group = gtk_window_get_group (GTK_WINDOW (root));
grab = gtk_window_group_get_current_grab (window_group);
}
shadowed = grab && grab != widget && !gtk_widget_is_ancestor (widget, grab);
if (!gtk_widget_is_sensitive (widget) && gtk_widget_has_grab (widget))
gtk_grab_remove (widget);
gtk_css_node_set_state (priv->cssnode, new_flags);
g_signal_emit (widget, widget_signals[STATE_FLAGS_CHANGED], 0, old_flags);
if (!shadowed &&
(new_flags & GTK_STATE_FLAG_INSENSITIVE) != (old_flags & GTK_STATE_FLAG_INSENSITIVE))
{
guint i, n_devices;
GdkDevice **devices;
devices = _gtk_widget_list_devices (widget, &n_devices);
for (i = 0; i < n_devices; i++)
{
GdkDevice *device;
device = devices[i];
if (!gtk_widget_is_sensitive (widget))
_gtk_widget_synthesize_crossing (widget, NULL, device,
GDK_CROSSING_STATE_CHANGED);
else
_gtk_widget_synthesize_crossing (NULL, widget, device,
GDK_CROSSING_STATE_CHANGED);
}
g_free (devices);
}
if (!gtk_widget_is_sensitive (widget))
gtk_widget_reset_controllers (widget);
/* Make sure to only propagate the right states further */
child_data.old_scale_factor = new_scale_factor;
child_data.flags_to_set = data->flags_to_set & GTK_STATE_FLAGS_DO_SET_PROPAGATE;
child_data.flags_to_unset = data->flags_to_unset & GTK_STATE_FLAGS_DO_UNSET_PROPAGATE;
if (child_data.flags_to_set != 0 ||
child_data.flags_to_unset != 0)
{
for (child = _gtk_widget_get_first_child (widget);
child != NULL;
child = _gtk_widget_get_next_sibling (child))
{
gtk_widget_propagate_state (child, &child_data);
}
}
g_object_unref (widget);
}
}
/**
* gtk_requisition_new:
*
* Allocates a new `GtkRequisition`.
*
* The struct is initialized to zero.
*
* Returns: a new empty `GtkRequisition`. The newly
* allocated `GtkRequisition` should be freed with
* [method@Gtk.Requisition.free]
*/
GtkRequisition *
gtk_requisition_new (void)
{
return g_new0 (GtkRequisition, 1);
}
/**
* gtk_requisition_copy:
* @requisition: a `GtkRequisition`
*
* Copies a `GtkRequisition`.
*
* Returns: a copy of @requisition
*/
GtkRequisition *
gtk_requisition_copy (const GtkRequisition *requisition)
{
GtkRequisition *copy = g_new (GtkRequisition, 1);
memcpy (copy, requisition, sizeof (GtkRequisition));
return copy;
}
/**
* gtk_requisition_free:
* @requisition: a `GtkRequisition`
*
* Frees a `GtkRequisition`.
*/
void
gtk_requisition_free (GtkRequisition *requisition)
{
g_free (requisition);
}
G_DEFINE_BOXED_TYPE (GtkRequisition, gtk_requisition,
gtk_requisition_copy,
gtk_requisition_free)
/*
* Expand flag management
*/
static void
gtk_widget_update_computed_expand (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->need_compute_expand)
{
gboolean h, v;
if (priv->hexpand_set)
h = priv->hexpand;
else
h = FALSE;
if (priv->vexpand_set)
v = priv->vexpand;
else
v = FALSE;
/* we don't need to use compute_expand if both expands are
* forced by the app
*/
if (!(priv->hexpand_set && priv->vexpand_set))
{
if (GTK_WIDGET_GET_CLASS (widget)->compute_expand != NULL)
{
gboolean ignored;
GTK_WIDGET_GET_CLASS (widget)->compute_expand (widget,
priv->hexpand_set ? &ignored : &h,
priv->vexpand_set ? &ignored : &v);
}
}
priv->need_compute_expand = FALSE;
priv->computed_hexpand = h != FALSE;
priv->computed_vexpand = v != FALSE;
}
}
/**
* gtk_widget_queue_compute_expand:
* @widget: a `GtkWidget`
*
* Mark @widget as needing to recompute its expand flags.
*
* Call this function when setting legacy expand child
* properties on the child of a container.
*
* See [method@Gtk.Widget.compute_expand].
*/
static void
gtk_widget_queue_compute_expand (GtkWidget *widget)
{
GtkWidget *parent;
gboolean changed_anything;
if (widget->priv->need_compute_expand)
return;
changed_anything = FALSE;
parent = widget;
while (parent != NULL)
{
if (!parent->priv->need_compute_expand)
{
parent->priv->need_compute_expand = TRUE;
changed_anything = TRUE;
}
/* Note: if we had an invariant that "if a child needs to
* compute expand, its parents also do" then we could stop going
* up when we got to a parent that already needed to
* compute. However, in general we compute expand lazily (as
* soon as we see something in a subtree that is expand, we know
* we're expanding) and so this invariant does not hold and we
* have to always walk all the way up in case some ancestor
* is not currently need_compute_expand.
*/
parent = parent->priv->parent;
}
/* recomputing expand always requires
* a relayout as well
*/
if (changed_anything)
gtk_widget_queue_resize (widget);
}
/**
* gtk_widget_compute_expand:
* @widget: the widget
* @orientation: expand direction
*
* Computes whether a container should give this widget
* extra space when possible.
*
* Containers should check this, rather than looking at
* [method@Gtk.Widget.get_hexpand] or [method@Gtk.Widget.get_vexpand].
*
* This function already checks whether the widget is visible, so
* visibility does not need to be checked separately. Non-visible
* widgets are not expanded.
*
* The computed expand value uses either the expand setting explicitly
* set on the widget itself, or, if none has been explicitly set,
* the widget may expand if some of its children do.
*
* Returns: whether widget tree rooted here should be expanded
*/
gboolean
gtk_widget_compute_expand (GtkWidget *widget,
GtkOrientation orientation)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
/* We never make a widget expand if not even showing. */
if (!_gtk_widget_get_visible (widget))
return FALSE;
gtk_widget_update_computed_expand (widget);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
return priv->computed_hexpand;
else
return priv->computed_vexpand;
}
static void
gtk_widget_set_expand (GtkWidget *widget,
GtkOrientation orientation,
gboolean expand)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
int expand_prop;
int expand_set_prop;
g_return_if_fail (GTK_IS_WIDGET (widget));
expand = expand != FALSE;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (priv->hexpand_set &&
priv->hexpand == expand)
return;
priv->hexpand_set = TRUE;
priv->hexpand = expand;
expand_prop = PROP_HEXPAND;
expand_set_prop = PROP_HEXPAND_SET;
}
else
{
if (priv->vexpand_set &&
priv->vexpand == expand)
return;
priv->vexpand_set = TRUE;
priv->vexpand = expand;
expand_prop = PROP_VEXPAND;
expand_set_prop = PROP_VEXPAND_SET;
}
gtk_widget_queue_compute_expand (widget);
g_object_freeze_notify (G_OBJECT (widget));
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[expand_prop]);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[expand_set_prop]);
g_object_thaw_notify (G_OBJECT (widget));
}
static void
gtk_widget_set_expand_set (GtkWidget *widget,
GtkOrientation orientation,
gboolean set)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
int prop;
set = set != FALSE;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (set == priv->hexpand_set)
return;
priv->hexpand_set = set;
prop = PROP_HEXPAND_SET;
}
else
{
if (set == priv->vexpand_set)
return;
priv->vexpand_set = set;
prop = PROP_VEXPAND_SET;
}
gtk_widget_queue_compute_expand (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[prop]);
}
/**
* gtk_widget_get_hexpand: (attributes org.gtk.Method.get_property=hexpand)
* @widget: the widget
*
* Gets whether the widget would like any available extra horizontal
* space.
*
* When a user resizes a `GtkWindow`, widgets with expand=TRUE
* generally receive the extra space. For example, a list or
* scrollable area or document in your window would often be set to
* expand.
*
* Containers should use [method@Gtk.Widget.compute_expand] rather
* than this function, to see whether a widget, or any of its children,
* has the expand flag set. If any child of a widget wants to
* expand, the parent may ask to expand also.
*
* This function only looks at the widget’s own hexpand flag, rather
* than computing whether the entire widget tree rooted at this widget
* wants to expand.
*
* Returns: whether hexpand flag is set
*/
gboolean
gtk_widget_get_hexpand (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->hexpand;
}
/**
* gtk_widget_set_hexpand: (attributes org.gtk.Method.set_property=hexpand)
* @widget: the widget
* @expand: whether to expand
*
* Sets whether the widget would like any available extra horizontal
* space.
*
* When a user resizes a `GtkWindow`, widgets with expand=TRUE
* generally receive the extra space. For example, a list or
* scrollable area or document in your window would often be set to
* expand.
*
* Call this function to set the expand flag if you would like your
* widget to become larger horizontally when the window has extra
* room.
*
* By default, widgets automatically expand if any of their children
* want to expand. (To see if a widget will automatically expand given
* its current children and state, call [method@Gtk.Widget.compute_expand].
* A container can decide how the expandability of children affects the
* expansion of the container by overriding the compute_expand virtual
* method on `GtkWidget`.).
*
* Setting hexpand explicitly with this function will override the
* automatic expand behavior.
*
* This function forces the widget to expand or not to expand,
* regardless of children. The override occurs because
* [method@Gtk.Widget.set_hexpand] sets the hexpand-set property (see
* [method@Gtk.Widget.set_hexpand_set]) which causes the widget’s hexpand
* value to be used, rather than looking at children and widget state.
*/
void
gtk_widget_set_hexpand (GtkWidget *widget,
gboolean expand)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_widget_set_expand (widget, GTK_ORIENTATION_HORIZONTAL, expand);
}
/**
* gtk_widget_get_hexpand_set: (attributes org.gtk.Method.get_property=hexpand-set)
* @widget: the widget
*
* Gets whether gtk_widget_set_hexpand() has been used
* to explicitly set the expand flag on this widget.
*
* If [property@Gtk.Widget:hexpand] property is set, then it
* overrides any computed expand value based on child widgets.
* If `hexpand` is not set, then the expand value depends on
* whether any children of the widget would like to expand.
*
* There are few reasons to use this function, but it’s here
* for completeness and consistency.
*
* Returns: whether hexpand has been explicitly set
*/
gboolean
gtk_widget_get_hexpand_set (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->hexpand_set;
}
/**
* gtk_widget_set_hexpand_set: (attributes org.gtk.Method.set_property=hexpand-set)
* @widget: the widget
* @set: value for hexpand-set property
*
* Sets whether the hexpand flag will be used.
*
* The [property@Gtk.Widget:hexpand-set] property will be set
* automatically when you call [method@Gtk.Widget.set_hexpand]
* to set hexpand, so the most likely reason to use this function
* would be to unset an explicit expand flag.
*
* If hexpand is set, then it overrides any computed
* expand value based on child widgets. If hexpand is not
* set, then the expand value depends on whether any
* children of the widget would like to expand.
*
* There are few reasons to use this function, but it’s here
* for completeness and consistency.
*/
void
gtk_widget_set_hexpand_set (GtkWidget *widget,
gboolean set)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_widget_set_expand_set (widget, GTK_ORIENTATION_HORIZONTAL, set);
}
/**
* gtk_widget_get_vexpand: (attributes org.gtk.Method.get_property=vexpand)
* @widget: the widget
*
* Gets whether the widget would like any available extra vertical
* space.
*
* See [method@Gtk.Widget.get_hexpand] for more detail.
*
* Returns: whether vexpand flag is set
*/
gboolean
gtk_widget_get_vexpand (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->vexpand;
}
/**
* gtk_widget_set_vexpand: (attributes org.gtk.Method.set_property=vexpand)
* @widget: the widget
* @expand: whether to expand
*
* Sets whether the widget would like any available extra vertical
* space.
*
* See [method@Gtk.Widget.set_hexpand] for more detail.
*/
void
gtk_widget_set_vexpand (GtkWidget *widget,
gboolean expand)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_widget_set_expand (widget, GTK_ORIENTATION_VERTICAL, expand);
}
/**
* gtk_widget_get_vexpand_set: (attributes org.gtk.Method.get_property=vexpand-set)
* @widget: the widget
*
* Gets whether gtk_widget_set_vexpand() has been used to
* explicitly set the expand flag on this widget.
*
* See [method@Gtk.Widget.get_hexpand_set] for more detail.
*
* Returns: whether vexpand has been explicitly set
*/
gboolean
gtk_widget_get_vexpand_set (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->vexpand_set;
}
/**
* gtk_widget_set_vexpand_set: (attributes org.gtk.Method.set_property=vexpand-set)
* @widget: the widget
* @set: value for vexpand-set property
*
* Sets whether the vexpand flag will be used.
*
* See [method@Gtk.Widget.set_hexpand_set] for more detail.
*/
void
gtk_widget_set_vexpand_set (GtkWidget *widget,
gboolean set)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_widget_set_expand_set (widget, GTK_ORIENTATION_VERTICAL, set);
}
/*
* GtkAccessible implementation
*/
static GtkATContext *
create_at_context (GtkWidget *self)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
GtkWidgetClassPrivate *class_priv = GTK_WIDGET_GET_CLASS (self)->priv;
GtkAccessibleRole role;
if (priv->in_destruction)
{
GTK_DEBUG (A11Y, "ATContext for widget “%s” [%p] accessed during destruction",
G_OBJECT_TYPE_NAME (self),
self);
return NULL;
}
/* Widgets have two options to set the accessible role: either they
* define it in their class_init() function, and the role applies to
* all instances; or an instance is created with the :accessible-role
* property (from GtkAccessible) set to anything other than the initial
* GTK_ACCESSIBLE_ROLE_WIDGET value.
*
* In either case, the accessible role cannot be set post-construction.
*/
if (priv->accessible_role != GTK_ACCESSIBLE_ROLE_WIDGET)
role = priv->accessible_role;
else
role = class_priv->accessible_role;
priv->accessible_role = role;
return gtk_at_context_create (role, GTK_ACCESSIBLE (self), gdk_display_get_default ());
}
static GtkATContext *
gtk_widget_accessible_get_at_context (GtkAccessible *accessible)
{
GtkWidget *self = GTK_WIDGET (accessible);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
if (priv->in_destruction)
{
GTK_DEBUG (A11Y, "ATContext for widget “%s” [%p] accessed during destruction",
G_OBJECT_TYPE_NAME (self),
self);
return NULL;
}
if (priv->at_context != NULL)
return g_object_ref (priv->at_context);
priv->at_context = create_at_context (self);
if (priv->at_context != NULL)
return g_object_ref (priv->at_context);
return NULL;
}
static gboolean
gtk_widget_accessible_get_platform_state (GtkAccessible *self,
GtkAccessiblePlatformState state)
{
switch (state)
{
case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSABLE:
return gtk_widget_get_focusable (GTK_WIDGET (self));
case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSED:
return gtk_widget_has_focus (GTK_WIDGET (self));
case GTK_ACCESSIBLE_PLATFORM_STATE_ACTIVE:
return FALSE;
default:
g_assert_not_reached ();
}
}
static GtkAccessible *
gtk_widget_accessible_get_accessible_parent (GtkAccessible *self)
{
GtkWidget *parent = _gtk_widget_get_parent (GTK_WIDGET (self));
if (parent == NULL)
return NULL;
return GTK_ACCESSIBLE (g_object_ref (parent));
}
static GtkAccessible *
gtk_widget_accessible_get_next_accessible_sibling (GtkAccessible *self)
{
GtkWidget *sibling = _gtk_widget_get_next_sibling (GTK_WIDGET (self));
if (sibling == NULL)
return NULL;
return GTK_ACCESSIBLE (g_object_ref (sibling));
}
static GtkAccessible *
gtk_widget_accessible_get_first_accessible_child (GtkAccessible *self)
{
GtkWidget *child = _gtk_widget_get_first_child (GTK_WIDGET (self));
if (child == NULL)
return NULL;
return GTK_ACCESSIBLE (g_object_ref (child));
}
static gboolean
gtk_widget_accessible_get_bounds (GtkAccessible *self,
int *x,
int *y,
int *width,
int *height)
{
GtkWidget *widget;
GtkWidget *parent;
GtkWidget *bounds_relative_to;
graphene_rect_t bounds = GRAPHENE_RECT_INIT_ZERO;
widget = GTK_WIDGET (self);
if (!gtk_widget_get_realized (widget))
return FALSE;
parent = gtk_widget_get_parent (widget);
if (parent != NULL)
{
graphene_point_t p;
if (!gtk_widget_compute_point (widget, parent, &GRAPHENE_POINT_INIT (0, 0), &p))
graphene_point_init (&p, 0, 0);
*x = floorf (p.x);
*y = floorf (p.y);
bounds_relative_to = parent;
}
else
{
*x = *y = 0;
bounds_relative_to = widget;
}
if (!gtk_widget_compute_bounds (widget, bounds_relative_to, &bounds))
{
*width = 0;
*height = 0;
}
else
{
*width = ceilf (graphene_rect_get_width (&bounds));
*height = ceilf (graphene_rect_get_height (&bounds));
}
return TRUE;
}
static void
gtk_widget_accessible_interface_init (GtkAccessibleInterface *iface)
{
iface->get_at_context = gtk_widget_accessible_get_at_context;
iface->get_platform_state = gtk_widget_accessible_get_platform_state;
iface->get_accessible_parent = gtk_widget_accessible_get_accessible_parent;
iface->get_first_accessible_child = gtk_widget_accessible_get_first_accessible_child;
iface->get_next_accessible_sibling = gtk_widget_accessible_get_next_accessible_sibling;
iface->get_bounds = gtk_widget_accessible_get_bounds;
}
static void
gtk_widget_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *type)
{
if (type != NULL)
{
GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
}
if (GTK_IS_WIDGET (child))
{
gtk_widget_set_parent (GTK_WIDGET (child), GTK_WIDGET (buildable));
}
else if (GTK_IS_EVENT_CONTROLLER (child))
{
gtk_widget_add_controller (GTK_WIDGET (buildable), g_object_ref (GTK_EVENT_CONTROLLER (child)));
}
else
{
g_warning ("Cannot add an object of type %s to a widget of type %s",
g_type_name (G_OBJECT_TYPE (child)), g_type_name (G_OBJECT_TYPE (buildable)));
}
}
static void
gtk_widget_buildable_interface_init (GtkBuildableIface *iface)
{
quark_builder_set_id = g_quark_from_static_string ("gtk-builder-set-id");
iface->set_id = gtk_widget_buildable_set_id;
iface->get_id = gtk_widget_buildable_get_id;
iface->get_internal_child = gtk_widget_buildable_get_internal_child;
iface->custom_tag_start = gtk_widget_buildable_custom_tag_start;
iface->custom_tag_end = gtk_widget_buildable_custom_tag_end;
iface->custom_finished = gtk_widget_buildable_custom_finished;
iface->add_child = gtk_widget_buildable_add_child;
}
static void
gtk_widget_buildable_set_id (GtkBuildable *buildable,
const char *id)
{
g_object_set_qdata_full (G_OBJECT (buildable), quark_builder_set_id,
g_strdup (id), g_free);
}
static const char *
gtk_widget_buildable_get_id (GtkBuildable *buildable)
{
return g_object_get_qdata (G_OBJECT (buildable), quark_builder_set_id);
}
static GObject *
gtk_widget_buildable_get_internal_child (GtkBuildable *buildable,
GtkBuilder *builder,
const char *childname)
{
GtkWidgetClass *class;
GSList *l;
GType internal_child_type = 0;
/* Find a widget type which has declared an automated child as internal by
* the name 'childname', if any.
*/
for (class = GTK_WIDGET_GET_CLASS (buildable);
GTK_IS_WIDGET_CLASS (class);
class = g_type_class_peek_parent (class))
{
GtkWidgetTemplate *template = class->priv->template;
if (!template)
continue;
for (l = template->children; l && internal_child_type == 0; l = l->next)
{
AutomaticChildClass *child_class = l->data;
if (child_class->internal_child && strcmp (childname, child_class->name) == 0)
internal_child_type = G_OBJECT_CLASS_TYPE (class);
}
}
/* Now return the 'internal-child' from the class which declared it, note
* that gtk_widget_get_template_child() an API used to access objects
* which are in the private scope of a given class.
*/
if (internal_child_type != 0)
return gtk_widget_get_template_child (GTK_WIDGET (buildable), internal_child_type, childname);
return NULL;
}
typedef struct
{
GtkBuilder *builder;
GSList *classes;
} StyleParserData;
static void
style_start_element (GtkBuildableParseContext *context,
const char *element_name,
const char **names,
const char **values,
gpointer user_data,
GError **error)
{
StyleParserData *data = (StyleParserData *)user_data;
if (strcmp (element_name, "class") == 0)
{
const char *name;
if (!_gtk_builder_check_parent (data->builder, context, "style", error))
return;
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING, "name", &name,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (data->builder, context, error);
return;
}
data->classes = g_slist_prepend (data->classes, g_strdup (name));
}
else if (strcmp (element_name, "style") == 0)
{
if (!_gtk_builder_check_parent (data->builder, context, "object", error))
return;
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_INVALID, NULL, NULL,
G_MARKUP_COLLECT_INVALID))
_gtk_builder_prefix_error (data->builder, context, error);
}
else
{
_gtk_builder_error_unhandled_tag (data->builder, context,
"GtkWidget", element_name,
error);
}
}
static const GtkBuildableParser style_parser =
{
style_start_element,
};
typedef struct
{
char *name;
GString *value;
char *context;
gboolean translatable;
} LayoutPropertyInfo;
typedef struct
{
GObject *object;
GtkBuilder *builder;
LayoutPropertyInfo *cur_property;
/* SList<LayoutPropertyInfo> */
GSList *properties;
} LayoutParserData;
static void
layout_property_info_free (gpointer data)
{
LayoutPropertyInfo *pinfo = data;
if (pinfo == NULL)
return;
g_free (pinfo->name);
g_free (pinfo->context);
g_string_free (pinfo->value, TRUE);
g_free (pinfo);
}
static void
layout_start_element (GtkBuildableParseContext *context,
const char *element_name,
const char **names,
const char **values,
gpointer user_data,
GError **error)
{
LayoutParserData *layout_data = user_data;
if (strcmp (element_name, "property") == 0)
{
const char *name = NULL;
const char *ctx = NULL;
gboolean translatable = FALSE;
LayoutPropertyInfo *pinfo;
if (!_gtk_builder_check_parent (layout_data->builder, context, "layout", error))
return;
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING, "name", &name,
G_MARKUP_COLLECT_BOOLEAN | G_MARKUP_COLLECT_OPTIONAL, "translatable", &translatable,
G_MARKUP_COLLECT_STRING | G_MARKUP_COLLECT_OPTIONAL, "context", &ctx,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (layout_data->builder, context, error);
return;
}
pinfo = g_new0 (LayoutPropertyInfo, 1);
pinfo->name = g_strdup (name);
pinfo->translatable = translatable;
pinfo->context = g_strdup (ctx);
pinfo->value = g_string_new (NULL);
layout_data->cur_property = pinfo;
}
else if (strcmp (element_name, "layout") == 0)
{
if (!_gtk_builder_check_parent (layout_data->builder, context, "object", error))
return;
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_INVALID, NULL, NULL,
G_MARKUP_COLLECT_INVALID))
_gtk_builder_prefix_error (layout_data->builder, context, error);
}
else
{
_gtk_builder_error_unhandled_tag (layout_data->builder, context,
"GtkWidget", element_name,
error);
}
}
static void
layout_text (GtkBuildableParseContext *context,
const char *text,
gsize text_len,
gpointer user_data,
GError **error)
{
LayoutParserData *layout_data = user_data;
if (layout_data->cur_property != NULL)
g_string_append_len (layout_data->cur_property->value, text, text_len);
}
static void
layout_end_element (GtkBuildableParseContext *context,
const char *element_name,
gpointer user_data,
GError **error)
{
LayoutParserData *layout_data = user_data;
if (layout_data->cur_property != NULL)
{
LayoutPropertyInfo *pinfo = g_steal_pointer (&layout_data->cur_property);
/* Translate the string, if needed */
if (pinfo->value->len != 0 && pinfo->translatable)
{
const char *translated;
const char *domain;
domain = gtk_builder_get_translation_domain (layout_data->builder);
translated = _gtk_builder_parser_translate (domain, pinfo->context, pinfo->value->str);
g_string_assign (pinfo->value, translated);
}
/* We assign all properties at the end of the `layout` section */
layout_data->properties = g_slist_prepend (layout_data->properties, pinfo);
}
}
static const GtkBuildableParser layout_parser =
{
layout_start_element,
layout_end_element,
layout_text,
};
typedef struct
{
char *name;
GString *value;
char *context;
gboolean translatable;
} AccessibilityAttributeInfo;
typedef struct
{
GObject *object;
GtkBuilder *builder;
AccessibilityAttributeInfo *cur_attribute;
/* SList<AccessibilityAttributeInfo> */
GSList *properties;
GSList *states;
GSList *relations;
} AccessibilityParserData;
static void
accessibility_attribute_info_free (gpointer data)
{
AccessibilityAttributeInfo *pinfo = data;
if (pinfo == NULL)
return;
g_free (pinfo->name);
g_free (pinfo->context);
g_string_free (pinfo->value, TRUE);
g_free (pinfo);
}
static void
accessibility_start_element (GtkBuildableParseContext *context,
const char *element_name,
const char **names,
const char **values,
gpointer user_data,
GError **error)
{
AccessibilityParserData *accessibility_data = user_data;
if (strcmp (element_name, "property") == 0 ||
strcmp (element_name, "relation") == 0 ||
strcmp (element_name, "state") == 0)
{
const char *name = NULL;
const char *ctx = NULL;
gboolean translatable = FALSE;
AccessibilityAttributeInfo *pinfo;
if (!_gtk_builder_check_parent (accessibility_data->builder,
context,
"accessibility",
error))
return;
if (!g_markup_collect_attributes (element_name, names, values, error,
G_MARKUP_COLLECT_STRING, "name", &name,
G_MARKUP_COLLECT_BOOLEAN | G_MARKUP_COLLECT_OPTIONAL, "translatable", &translatable,
G_MARKUP_COLLECT_STRING | G_MARKUP_COLLECT_OPTIONAL, "context", &ctx,
G_MARKUP_COLLECT_INVALID))
{
_gtk_builder_prefix_error (accessibility_data->builder, context, error);
return;
}
pinfo = g_new0 (AccessibilityAttributeInfo, 1);
pinfo->name = g_strdup (name);
pinfo->translatable = translatable;
pinfo->context = g_strdup (ctx);
pinfo->value = g_string_new (NULL);
accessibility_data->cur_attribute = pinfo;
}
else if (strcmp (element_name, "accessibility") == 0)
{
if (!_gtk_builder_check_parent (accessibility_data->builder,
context,
"object",
error))
return;
}
else
{
_gtk_builder_error_unhandled_tag (accessibility_data->builder, context,
"GtkWidget", element_name,
error);
}
}
static void
accessibility_text (GtkBuildableParseContext *context,
const char *text,
gsize text_len,
gpointer user_data,
GError **error)
{
AccessibilityParserData *accessibility_data = user_data;
if (accessibility_data->cur_attribute != NULL)
g_string_append_len (accessibility_data->cur_attribute->value, text, text_len);
}
static void
accessibility_end_element (GtkBuildableParseContext *context,
const char *element_name,
gpointer user_data,
GError **error)
{
AccessibilityParserData *accessibility_data = user_data;
if (accessibility_data->cur_attribute != NULL)
{
AccessibilityAttributeInfo *pinfo = g_steal_pointer (&accessibility_data->cur_attribute);
/* Translate the string, if needed */
if (pinfo->value->len != 0 && pinfo->translatable)
{
const char *translated;
const char *domain;
domain = gtk_builder_get_translation_domain (accessibility_data->builder);
translated = _gtk_builder_parser_translate (domain, pinfo->context, pinfo->value->str);
g_string_assign (pinfo->value, translated);
}
/* We assign all properties at the end of the `accessibility` section */
if (strcmp (element_name, "property") == 0)
accessibility_data->properties = g_slist_prepend (accessibility_data->properties, pinfo);
else if (strcmp (element_name, "relation") == 0)
accessibility_data->relations = g_slist_prepend (accessibility_data->relations, pinfo);
else if (strcmp (element_name, "state") == 0)
accessibility_data->states = g_slist_prepend (accessibility_data->states, pinfo);
else
{
_gtk_builder_error_unhandled_tag (accessibility_data->builder, context,
"GtkWidget", element_name,
error);
accessibility_attribute_info_free (pinfo);
}
}
}
static const GtkBuildableParser accessibility_parser = {
accessibility_start_element,
accessibility_end_element,
accessibility_text,
};
static gboolean
gtk_widget_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
GtkBuildableParser *parser,
gpointer *parser_data)
{
if (strcmp (tagname, "style") == 0)
{
StyleParserData *data;
data = g_new0 (StyleParserData, 1);
data->builder = builder;
*parser = style_parser;
*parser_data = data;
return TRUE;
}
if (strcmp (tagname, "layout") == 0)
{
LayoutParserData *data;
data = g_new0 (LayoutParserData, 1);
data->builder = builder;
data->object = (GObject *) g_object_ref (buildable);
*parser = layout_parser;
*parser_data = data;
return TRUE;
}
if (strcmp (tagname, "accessibility") == 0)
{
AccessibilityParserData *data;
data = g_new0 (AccessibilityParserData, 1);
data->builder = builder;
data->object = (GObject *) g_object_ref (buildable);
*parser = accessibility_parser;
*parser_data = data;
return TRUE;
}
return FALSE;
}
static void
gtk_widget_buildable_custom_tag_end (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
gpointer data)
{
}
static void
gtk_widget_buildable_finish_layout_properties (GtkWidget *widget,
GtkWidget *parent,
gpointer data)
{
LayoutParserData *layout_data = data;
GtkLayoutManager *layout_manager;
GtkLayoutChild *layout_child;
GObject *gobject;
GObjectClass *gobject_class;
GSList *layout_properties, *l;
layout_manager = gtk_widget_get_layout_manager (parent);
if (layout_manager == NULL)
return;
layout_child = gtk_layout_manager_get_layout_child (layout_manager, widget);
if (layout_child == NULL)
return;
gobject = G_OBJECT (layout_child);
gobject_class = G_OBJECT_GET_CLASS (layout_child);
layout_properties = g_slist_reverse (layout_data->properties);
layout_data->properties = NULL;
for (l = layout_properties; l != NULL; l = l->next)
{
LayoutPropertyInfo *pinfo = l->data;
GParamSpec *pspec;
GValue value = G_VALUE_INIT;
GError *error = NULL;
pspec = g_object_class_find_property (gobject_class, pinfo->name);
if (pspec == NULL)
{
g_warning ("Unable to find layout property “%s” for children "
"of layout managers of type “%s”",
pinfo->name,
G_OBJECT_TYPE_NAME (layout_manager));
continue;
}
gtk_builder_value_from_string (layout_data->builder,
pspec,
pinfo->value->str,
&value,
&error);
if (error != NULL)
{
g_warning ("Failed to set property “%s.%s” to “%s”: %s",
G_OBJECT_TYPE_NAME (layout_child),
pinfo->name,
pinfo->value->str,
error->message);
g_error_free (error);
continue;
}
g_object_set_property (gobject, pinfo->name, &value);
g_value_unset (&value);
}
g_slist_free_full (layout_properties, layout_property_info_free);
}
static void
gtk_widget_buildable_finish_accessibility_properties (GtkWidget *widget,
gpointer data)
{
AccessibilityParserData *accessibility_data = data;
GSList *attributes, *l;
GtkATContext *context;
context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (widget));
if (context == NULL)
return;
attributes = g_slist_reverse (accessibility_data->properties);
accessibility_data->properties = NULL;
for (l = attributes; l != NULL; l = l->next)
{
AccessibilityAttributeInfo *pinfo = l->data;
int property;
GError *error = NULL;
GtkAccessibleValue *value;
_gtk_builder_enum_from_string (GTK_TYPE_ACCESSIBLE_PROPERTY,
pinfo->name,
&property,
&error);
if (error != NULL)
{
g_warning ("Failed to find accessible property “%s”: %s",
pinfo->name,
error->message);
g_error_free (error);
continue;
}
value = gtk_accessible_value_parse_for_property (property,
pinfo->value->str,
pinfo->value->len,
&error);
if (error != NULL)
{
g_warning ("Failed to set accessible property “%s” to “%s”: %s",
pinfo->name,
pinfo->value->str,
error->message);
g_error_free (error);
continue;
}
gtk_at_context_set_accessible_property (context, property, value);
gtk_accessible_value_unref (value);
}
g_slist_free_full (attributes, accessibility_attribute_info_free);
attributes = g_slist_reverse (accessibility_data->relations);
accessibility_data->relations = NULL;
for (l = attributes; l != NULL; l = l->next)
{
AccessibilityAttributeInfo *pinfo = l->data;
int relation;
GError *error = NULL;
GtkAccessibleValue *value;
_gtk_builder_enum_from_string (GTK_TYPE_ACCESSIBLE_RELATION,
pinfo->name,
&relation,
&error);
if (error != NULL)
{
g_warning ("Failed to find accessible relation “%s”: %s",
pinfo->name,
error->message);
g_error_free (error);
continue;
}
value = gtk_accessible_value_parse_for_relation (relation,
pinfo->value->str,
pinfo->value->len,
&error);
if (error != NULL)
{
g_warning ("Failed to set accessible relation “%s” to “%s”: %s",
pinfo->name,
pinfo->value->str,
error->message);
g_error_free (error);
continue;
}
if (value == NULL)
{
GObject *obj = gtk_builder_get_object (accessibility_data->builder,
pinfo->value->str);
if (obj == NULL)
{
g_warning ("Failed to find accessible object “%s” for relation “%s”",
pinfo->value->str,
pinfo->name);
continue;
}
/* FIXME: Need to distinguish between refs and refslist types */
value = gtk_reference_list_accessible_value_new (g_list_append (NULL, obj));
}
gtk_at_context_set_accessible_relation (context, relation, value);
gtk_accessible_value_unref (value);
}
g_slist_free_full (attributes, accessibility_attribute_info_free);
attributes = g_slist_reverse (accessibility_data->states);
accessibility_data->states = NULL;
for (l = attributes; l != NULL; l = l->next)
{
AccessibilityAttributeInfo *pinfo = l->data;
int state;
GError *error = NULL;
GtkAccessibleValue *value;
_gtk_builder_enum_from_string (GTK_TYPE_ACCESSIBLE_STATE,
pinfo->name,
&state,
&error);
if (error != NULL)
{
g_warning ("Failed to find accessible state “%s”: %s",
pinfo->name,
error->message);
g_error_free (error);
continue;
}
value = gtk_accessible_value_parse_for_state (state,
pinfo->value->str,
pinfo->value->len,
&error);
if (error != NULL)
{
g_warning ("Failed to set accessible state “%s” to “%s”: %s",
pinfo->name,
pinfo->value->str,
error->message);
g_error_free (error);
continue;
}
gtk_at_context_set_accessible_state (context, state, value);
gtk_accessible_value_unref (value);
}
g_slist_free_full (attributes, accessibility_attribute_info_free);
g_object_unref (context);
}
static void
gtk_widget_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
gpointer user_data)
{
if (strcmp (tagname, "style") == 0)
{
StyleParserData *style_data = (StyleParserData *)user_data;
GSList *l;
for (l = style_data->classes; l; l = l->next)
gtk_widget_add_css_class (GTK_WIDGET (buildable), (const char *)l->data);
g_slist_free_full (style_data->classes, g_free);
g_free (style_data);
}
else if (strcmp (tagname, "layout") == 0)
{
LayoutParserData *layout_data = (LayoutParserData *) user_data;
GtkWidget *parent = _gtk_widget_get_parent (GTK_WIDGET (buildable));
if (parent != NULL)
gtk_widget_buildable_finish_layout_properties (GTK_WIDGET (buildable),
parent,
layout_data);
/* Free the unapplied properties, if any */
g_slist_free_full (layout_data->properties, layout_property_info_free);
g_object_unref (layout_data->object);
g_free (layout_data);
}
else if (strcmp (tagname, "accessibility") == 0)
{
AccessibilityParserData *accessibility_data = user_data;
gtk_widget_buildable_finish_accessibility_properties (GTK_WIDGET (buildable),
accessibility_data);
g_slist_free_full (accessibility_data->properties,
accessibility_attribute_info_free);
g_slist_free_full (accessibility_data->relations,
accessibility_attribute_info_free);
g_slist_free_full (accessibility_data->states,
accessibility_attribute_info_free);
g_object_unref (accessibility_data->object);
g_free (accessibility_data);
}
}
/**
* gtk_widget_get_halign: (attributes org.gtk.Method.get_property=halign)
* @widget: a `GtkWidget`
*
* Gets the horizontal alignment of @widget.
*
* For backwards compatibility reasons this method will never return
* one of the baseline alignments, but instead it will convert it to
* `GTK_ALIGN_FILL` or `GTK_ALIGN_CENTER`.
*
* Baselines are not supported for horizontal alignment.
*
* Returns: the horizontal alignment of @widget
*/
GtkAlign
gtk_widget_get_halign (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), GTK_ALIGN_FILL);
if (priv->halign == GTK_ALIGN_BASELINE_FILL)
return GTK_ALIGN_FILL;
else if (priv->halign == GTK_ALIGN_BASELINE_CENTER)
return GTK_ALIGN_CENTER;
return priv->halign;
}
/**
* gtk_widget_set_halign: (attributes org.gtk.Method.set_property=halign)
* @widget: a `GtkWidget`
* @align: the horizontal alignment
*
* Sets the horizontal alignment of @widget.
*/
void
gtk_widget_set_halign (GtkWidget *widget,
GtkAlign align)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->halign == align)
return;
priv->halign = align;
gtk_widget_queue_allocate (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_HALIGN]);
}
/**
* gtk_widget_get_valign: (attributes org.gtk.Method.get_property=valign)
* @widget: a `GtkWidget`
*
* Gets the vertical alignment of @widget.
*
* Returns: the vertical alignment of @widget
*/
GtkAlign
gtk_widget_get_valign (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), GTK_ALIGN_FILL);
return priv->valign;
}
/**
* gtk_widget_set_valign: (attributes org.gtk.Method.set_property=valign)
* @widget: a `GtkWidget`
* @align: the vertical alignment
*
* Sets the vertical alignment of @widget.
*/
void
gtk_widget_set_valign (GtkWidget *widget,
GtkAlign align)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->valign == align)
return;
priv->valign = align;
gtk_widget_queue_allocate (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_VALIGN]);
}
/**
* gtk_widget_get_margin_start: (attributes org.gtk.Method.get_property=margin-start)
* @widget: a `GtkWidget`
*
* Gets the start margin of @widget.
*
* Returns: The start margin of @widget
*/
int
gtk_widget_get_margin_start (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
return priv->margin.left;
}
/**
* gtk_widget_set_margin_start: (attributes org.gtk.Method.set_property=margin-start)
* @widget: a `GtkWidget`
* @margin: the start margin
*
* Sets the start margin of @widget.
*/
void
gtk_widget_set_margin_start (GtkWidget *widget,
int margin)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (margin <= G_MAXINT16);
/* We always save margin-start as .left */
if (priv->margin.left == margin)
return;
priv->margin.left = margin;
gtk_widget_queue_resize (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_MARGIN_START]);
}
/**
* gtk_widget_get_margin_end: (attributes org.gtk.Method.get_property=margin-end)
* @widget: a `GtkWidget`
*
* Gets the end margin of @widget.
*
* Returns: The end margin of @widget
*/
int
gtk_widget_get_margin_end (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
return priv->margin.right;
}
/**
* gtk_widget_set_margin_end: (attributes org.gtk.Method.set_property=margin-end)
* @widget: a `GtkWidget`
* @margin: the end margin
*
* Sets the end margin of @widget.
*/
void
gtk_widget_set_margin_end (GtkWidget *widget,
int margin)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (margin <= G_MAXINT16);
/* We always set margin-end as .right */
if (priv->margin.right == margin)
return;
priv->margin.right = margin;
gtk_widget_queue_resize (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_MARGIN_END]);
}
/**
* gtk_widget_get_margin_top: (attributes org.gtk.Method.get_property=margin-top)
* @widget: a `GtkWidget`
*
* Gets the top margin of @widget.
*
* Returns: The top margin of @widget
*/
int
gtk_widget_get_margin_top (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
return priv->margin.top;
}
/**
* gtk_widget_set_margin_top: (attributes org.gtk.Method.set_property=margin-top)
* @widget: a `GtkWidget`
* @margin: the top margin
*
* Sets the top margin of @widget.
*/
void
gtk_widget_set_margin_top (GtkWidget *widget,
int margin)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (margin <= G_MAXINT16);
if (priv->margin.top == margin)
return;
priv->margin.top = margin;
gtk_widget_queue_resize (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_MARGIN_TOP]);
}
/**
* gtk_widget_get_margin_bottom: (attributes org.gtk.Method.get_property=margin-bottom)
* @widget: a `GtkWidget`
*
* Gets the bottom margin of @widget.
*
* Returns: The bottom margin of @widget
*/
int
gtk_widget_get_margin_bottom (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
return priv->margin.bottom;
}
/**
* gtk_widget_set_margin_bottom: (attributes org.gtk.Method.set_property=margin-bottom)
* @widget: a `GtkWidget`
* @margin: the bottom margin
*
* Sets the bottom margin of @widget.
*/
void
gtk_widget_set_margin_bottom (GtkWidget *widget,
int margin)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (margin <= G_MAXINT16);
if (priv->margin.bottom == margin)
return;
priv->margin.bottom = margin;
gtk_widget_queue_resize (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_MARGIN_BOTTOM]);
}
/**
* gtk_widget_get_clipboard:
* @widget: a `GtkWidget`
*
* Gets the clipboard object for @widget.
*
* This is a utility function to get the clipboard object for the
* `GdkDisplay` that @widget is using.
*
* Note that this function always works, even when @widget is not
* realized yet.
*
* Returns: (transfer none): the appropriate clipboard object
*/
GdkClipboard *
gtk_widget_get_clipboard (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return gdk_display_get_clipboard (_gtk_widget_get_display (widget));
}
/**
* gtk_widget_get_primary_clipboard:
* @widget: a `GtkWidget`
*
* Gets the primary clipboard of @widget.
*
* This is a utility function to get the primary clipboard object
* for the `GdkDisplay` that @widget is using.
*
* Note that this function always works, even when @widget is not
* realized yet.
*
* Returns: (transfer none): the appropriate clipboard object
**/
GdkClipboard *
gtk_widget_get_primary_clipboard (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return gdk_display_get_primary_clipboard (_gtk_widget_get_display (widget));
}
/**
* gtk_widget_list_mnemonic_labels:
* @widget: a `GtkWidget`
*
* Returns the widgets for which this widget is the target of a
* mnemonic.
*
* Typically, these widgets will be labels. See, for example,
* [method@Gtk.Label.set_mnemonic_widget].
* The widgets in the list are not individually referenced.
* If you want to iterate through the list and perform actions
* involving callbacks that might destroy the widgets, you
* must call `g_list_foreach (result, (GFunc)g_object_ref, NULL)`
* first, and then unref all the widgets afterwards.
* Returns: (element-type GtkWidget) (transfer container): the list
* of mnemonic labels; free this list with g_list_free() when you
* are done with it.
*/
GList *
gtk_widget_list_mnemonic_labels (GtkWidget *widget)
{
GList *list = NULL;
GSList *l;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
for (l = g_object_get_qdata (G_OBJECT (widget), quark_mnemonic_labels); l; l = l->next)
list = g_list_prepend (list, l->data);
return list;
}
/**
* gtk_widget_add_mnemonic_label:
* @widget: a `GtkWidget`
* @label: a `GtkWidget` that acts as a mnemonic label for @widget
*
* Adds a widget to the list of mnemonic labels for this widget.
*
* See [method@Gtk.Widget.list_mnemonic_labels]. Note the
* list of mnemonic labels for the widget is cleared when the
* widget is destroyed, so the caller must make sure to update
* its internal state at this point as well.
*/
void
gtk_widget_add_mnemonic_label (GtkWidget *widget,
GtkWidget *label)
{
GSList *old_list, *new_list;
GtkAccessibleRelation relation = GTK_ACCESSIBLE_RELATION_LABELLED_BY;
GValue value = G_VALUE_INIT;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_WIDGET (label));
old_list = g_object_steal_qdata (G_OBJECT (widget), quark_mnemonic_labels);
new_list = g_slist_prepend (old_list, label);
g_object_set_qdata_full (G_OBJECT (widget), quark_mnemonic_labels,
new_list, (GDestroyNotify) g_slist_free);
/* The ATContext takes ownership of the GList returned by list_mnemonic_labels(),
* so we don't need to free it
*/
gtk_accessible_relation_init_value (relation, &value);
g_value_set_pointer (&value, gtk_widget_list_mnemonic_labels (widget));
gtk_accessible_update_relation_value (GTK_ACCESSIBLE (widget), 1, &relation, &value);
g_value_unset (&value);
}
/**
* gtk_widget_remove_mnemonic_label:
* @widget: a `GtkWidget`
* @label: a `GtkWidget` that was previously set as a mnemonic
* label for @widget with [method@Gtk.Widget.add_mnemonic_label]
*
* Removes a widget from the list of mnemonic labels for this widget.
*
* See [method@Gtk.Widget.list_mnemonic_labels]. The widget must
* have previously been added to the list with
* [method@Gtk.Widget.add_mnemonic_label].
*/
void
gtk_widget_remove_mnemonic_label (GtkWidget *widget,
GtkWidget *label)
{
GSList *old_list, *new_list;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_WIDGET (label));
old_list = g_object_steal_qdata (G_OBJECT (widget), quark_mnemonic_labels);
new_list = g_slist_remove (old_list, label);
if (new_list)
g_object_set_qdata_full (G_OBJECT (widget), quark_mnemonic_labels,
new_list, (GDestroyNotify) g_slist_free);
if (new_list != NULL && new_list->data != NULL)
{
GtkAccessibleRelation relation = GTK_ACCESSIBLE_RELATION_LABELLED_BY;
GValue value = G_VALUE_INIT;
/* The ATContext takes ownership of the GList returned by list_mnemonic_labels(),
* so we don't need to free it
*/
gtk_accessible_relation_init_value (relation, &value);
g_value_set_pointer (&value, gtk_widget_list_mnemonic_labels (widget));
gtk_accessible_update_relation_value (GTK_ACCESSIBLE (widget), 1, &relation, &value);
g_value_unset (&value);
}
else
{
gtk_accessible_reset_relation (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_RELATION_LABELLED_BY);
}
}
/**
* gtk_widget_trigger_tooltip_query:
* @widget: a `GtkWidget`
*
* Triggers a tooltip query on the display where the toplevel
* of @widget is located.
*/
void
gtk_widget_trigger_tooltip_query (GtkWidget *widget)
{
gtk_tooltip_trigger_tooltip_query (widget);
}
/**
* gtk_widget_set_tooltip_text: (attributes org.gtk.Method.set_property=tooltip-text)
* @widget: a `GtkWidget`
* @text: (nullable): the contents of the tooltip for @widget
*
* Sets @text as the contents of the tooltip.
*
* If @text contains any markup, it will be escaped.
*
* This function will take care of setting
* [property@Gtk.Widget:has-tooltip] as a side effect,
* and of the default handler for the
* [signal@Gtk.Widget::query-tooltip] signal.
*
* See also [method@Gtk.Tooltip.set_text].
*/
void
gtk_widget_set_tooltip_text (GtkWidget *widget,
const char *text)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GObject *object = G_OBJECT (widget);
char *tooltip_text, *tooltip_markup;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_object_freeze_notify (object);
/* Treat an empty string as a NULL string,
* because an empty string would be useless for a tooltip:
*/
if (text != NULL && *text == '\0')
{
tooltip_text = NULL;
tooltip_markup = NULL;
}
else
{
tooltip_text = g_strdup (text);
tooltip_markup = text != NULL ? g_markup_escape_text (text, -1) : NULL;
}
g_clear_pointer (&priv->tooltip_markup, g_free);
g_clear_pointer (&priv->tooltip_text, g_free);
priv->tooltip_text = tooltip_text;
priv->tooltip_markup = tooltip_markup;
gtk_widget_set_has_tooltip (widget, priv->tooltip_text != NULL);
if (_gtk_widget_get_visible (widget))
gtk_widget_trigger_tooltip_query (widget);
g_object_notify_by_pspec (object, widget_props[PROP_TOOLTIP_TEXT]);
g_object_notify_by_pspec (object, widget_props[PROP_TOOLTIP_MARKUP]);
g_object_notify_by_pspec (object, widget_props[PROP_HAS_TOOLTIP]);
g_object_thaw_notify (object);
}
/**
* gtk_widget_get_tooltip_text: (attributes org.gtk.Method.get_property=tooltip-text)
* @widget: a `GtkWidget`
*
* Gets the contents of the tooltip for @widget.
*
* If the @widget's tooltip was set using
* [method@Gtk.Widget.set_tooltip_markup],
* this function will return the escaped text.
*
* Returns: (nullable): the tooltip text
*/
const char *
gtk_widget_get_tooltip_text (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->tooltip_text;
}
/**
* gtk_widget_set_tooltip_markup: (attributes org.gtk.Method.set_property=tooltip-markup)
* @widget: a `GtkWidget`
* @markup: (nullable): the contents of the tooltip for @widget
*
* Sets @markup as the contents of the tooltip, which is marked
* up with Pango markup.
*
* This function will take care of setting the
* [property@Gtk.Widget:has-tooltip] as a side effect, and of the
* default handler for the [signal@Gtk.Widget::query-tooltip] signal.
*
* See also [method@Gtk.Tooltip.set_markup].
*/
void
gtk_widget_set_tooltip_markup (GtkWidget *widget,
const char *markup)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GObject *object = G_OBJECT (widget);
char *tooltip_markup;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_object_freeze_notify (object);
/* Treat an empty string as a NULL string,
* because an empty string would be useless for a tooltip:
*/
if (markup != NULL && *markup == '\0')
tooltip_markup = NULL;
else
tooltip_markup = g_strdup (markup);
g_clear_pointer (&priv->tooltip_text, g_free);
g_clear_pointer (&priv->tooltip_markup, g_free);
priv->tooltip_markup = tooltip_markup;
/* Store the tooltip without markup, as we might end up using
* it for widget descriptions in the accessibility layer
*/
if (priv->tooltip_markup != NULL)
{
pango_parse_markup (priv->tooltip_markup, -1, 0, NULL,
&priv->tooltip_text,
NULL,
NULL);
}
gtk_accessible_update_property (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_PROPERTY_DESCRIPTION, priv->tooltip_text,
-1);
gtk_widget_set_has_tooltip (widget, tooltip_markup != NULL);
if (_gtk_widget_get_visible (widget))
gtk_widget_trigger_tooltip_query (widget);
g_object_notify_by_pspec (object, widget_props[PROP_TOOLTIP_TEXT]);
g_object_notify_by_pspec (object, widget_props[PROP_TOOLTIP_MARKUP]);
g_object_notify_by_pspec (object, widget_props[PROP_HAS_TOOLTIP]);
g_object_thaw_notify (object);
}
/**
* gtk_widget_get_tooltip_markup: (attributes org.gtk.Method.get_property=tooltip-markup)
* @widget: a `GtkWidget`
*
* Gets the contents of the tooltip for @widget.
*
* If the tooltip has not been set using
* [method@Gtk.Widget.set_tooltip_markup], this
* function returns %NULL.
*
* Returns: (nullable): the tooltip text
*/
const char *
gtk_widget_get_tooltip_markup (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->tooltip_markup;
}
/**
* gtk_widget_set_has_tooltip: (attributes org.gtk.Method.set_property=has-tooltip)
* @widget: a `GtkWidget`
* @has_tooltip: whether or not @widget has a tooltip.
*
* Sets the `has-tooltip` property on @widget to @has_tooltip.
*/
void
gtk_widget_set_has_tooltip (GtkWidget *widget,
gboolean has_tooltip)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
has_tooltip = !!has_tooltip;
if (priv->has_tooltip != has_tooltip)
{
priv->has_tooltip = has_tooltip;
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_HAS_TOOLTIP]);
}
}
/**
* gtk_widget_get_has_tooltip: (attributes org.gtk.Method.get_property=has-tooltip)
* @widget: a `GtkWidget`
*
* Returns the current value of the `has-tooltip` property.
*
* Returns: current value of `has-tooltip` on @widget.
*/
gboolean
gtk_widget_get_has_tooltip (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return priv->has_tooltip;
}
/**
* gtk_widget_get_allocation:
* @widget: a `GtkWidget`
* @allocation: (out): a pointer to a `GtkAllocation` to copy to
*
* Retrieves the widget’s allocation.
*
* Note, when implementing a layout container: a widget’s allocation
* will be its “adjusted” allocation, that is, the widget’s parent
* typically calls [method@Gtk.Widget.size_allocate] with an allocation,
* and that allocation is then adjusted (to handle margin
* and alignment for example) before assignment to the widget.
* [method@Gtk.Widget.get_allocation] returns the adjusted allocation that
* was actually assigned to the widget. The adjusted allocation is
* guaranteed to be completely contained within the
* [method@Gtk.Widget.size_allocate] allocation, however.
*
* So a layout container is guaranteed that its children stay inside
* the assigned bounds, but not that they have exactly the bounds the
* container assigned.
*
* Deprecated: 4.12: Use [method@Gtk.Widget.compute_bounds],
* [method@Gtk.Widget.get_width] or [method@Gtk.Widget.get_height] instead.
*/
void
gtk_widget_get_allocation (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
const graphene_rect_t *margin_rect;
float dx, dy;
GtkCssBoxes boxes;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (allocation != NULL);
gtk_css_boxes_init (&boxes, widget);
margin_rect = gtk_css_boxes_get_margin_rect (&boxes);
if (gsk_transform_get_category (priv->transform) >= GSK_TRANSFORM_CATEGORY_2D_TRANSLATE)
gsk_transform_to_translate (priv->transform, &dx, &dy);
else
dx = dy = 0;
allocation->x = dx + ceil (margin_rect->origin.x);
allocation->y = dy + ceil (margin_rect->origin.y);
allocation->width = ceil (margin_rect->size.width);
allocation->height = ceil (margin_rect->size.height);
}
/**
* gtk_widget_contains:
* @widget: the widget to query
* @x: X coordinate to test, relative to @widget's origin
* @y: Y coordinate to test, relative to @widget's origin
*
* Tests if the point at (@x, @y) is contained in @widget.
*
* The coordinates for (@x, @y) must be in widget coordinates, so
* (0, 0) is assumed to be the top left of @widget's content area.
*
* Returns: %TRUE if @widget contains (@x, @y).
*/
gboolean
gtk_widget_contains (GtkWidget *widget,
double x,
double y)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (!_gtk_widget_get_mapped (widget))
return FALSE;
return GTK_WIDGET_GET_CLASS (widget)->contains (widget, x, y);
}
/* do the checks for gtk_widget_pick that do not depend on position */
static gboolean
gtk_widget_can_be_picked (GtkWidget *widget,
GtkPickFlags flags)
{
if (!_gtk_widget_get_mapped (widget))
return FALSE;
if (!(flags & GTK_PICK_NON_TARGETABLE) &&
!gtk_widget_get_can_target (widget))
return FALSE;
if (!(flags & GTK_PICK_INSENSITIVE) &&
!_gtk_widget_is_sensitive (widget))
return FALSE;
return TRUE;
}
static GtkWidget *
gtk_widget_do_pick (GtkWidget *widget,
double x,
double y,
GtkPickFlags flags)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidget *child;
if (priv->overflow == GTK_OVERFLOW_HIDDEN)
{
GtkCssBoxes boxes;
gtk_css_boxes_init (&boxes, widget);
if (!gsk_rounded_rect_contains_point (gtk_css_boxes_get_padding_box (&boxes),
&GRAPHENE_POINT_INIT (x, y)))
return NULL;
}
for (child = _gtk_widget_get_last_child (widget);
child;
child = _gtk_widget_get_prev_sibling (child))
{
GtkWidgetPrivate *child_priv = gtk_widget_get_instance_private (child);
GtkWidget *picked;
graphene_point3d_t res;
if (!gtk_widget_can_be_picked (child, flags))
continue;
if (GTK_IS_NATIVE (child))
continue;
if (child_priv->transform)
{
if (gsk_transform_get_category (child_priv->transform) >= GSK_TRANSFORM_CATEGORY_2D_TRANSLATE)
{
graphene_point_t transformed_p;
gsk_transform_transform_point (child_priv->transform,
&(graphene_point_t) { 0, 0 },
&transformed_p);
graphene_point3d_init (&res, x - transformed_p.x, y - transformed_p.y, 0.);
}
else
{
GskTransform *transform;
graphene_matrix_t inv;
graphene_point3d_t p0, p1;
transform = gsk_transform_invert (gsk_transform_ref (child_priv->transform));
if (transform == NULL)
continue;
gsk_transform_to_matrix (transform, &inv);
gsk_transform_unref (transform);
graphene_point3d_init (&p0, x, y, 0);
graphene_point3d_init (&p1, x, y, 1);
graphene_matrix_transform_point3d (&inv, &p0, &p0);
graphene_matrix_transform_point3d (&inv, &p1, &p1);
if (fabs (p0.z - p1.z) < 1.f / 4096)
continue;
graphene_point3d_interpolate (&p0, &p1, p0.z / (p0.z - p1.z), &res);
}
}
else
{
graphene_point3d_init (&res, x, y, 0);
}
picked = gtk_widget_do_pick (child, res.x, res.y, flags);
if (picked)
return picked;
}
if (!GTK_WIDGET_GET_CLASS (widget)->contains (widget, x, y))
return NULL;
return widget;
}
/**
* gtk_widget_pick:
* @widget: the widget to query
* @x: X coordinate to test, relative to @widget's origin
* @y: Y coordinate to test, relative to @widget's origin
* @flags: Flags to influence what is picked
*
* Finds the descendant of @widget closest to the point (@x, @y).
*
* The point must be given in widget coordinates, so (0, 0) is assumed
* to be the top left of @widget's content area.
*
* Usually widgets will return %NULL if the given coordinate is not
* contained in @widget checked via [method@Gtk.Widget.contains].
* Otherwise they will recursively try to find a child that does
* not return %NULL. Widgets are however free to customize their
* picking algorithm.
*
* This function is used on the toplevel to determine the widget
* below the mouse cursor for purposes of hover highlighting and
* delivering events.
*
* Returns: (nullable) (transfer none): The widget descendant at
* the given point
*/
GtkWidget *
gtk_widget_pick (GtkWidget *widget,
double x,
double y,
GtkPickFlags flags)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (!gtk_widget_can_be_picked (widget, flags))
return NULL;
return gtk_widget_do_pick (widget, x, y, flags);
}
/**
* gtk_widget_compute_transform:
* @widget: a `GtkWidget`
* @target: the target widget that the matrix will transform to
* @out_transform: (out caller-allocates): location to
* store the final transformation
*
* Computes a matrix suitable to describe a transformation from
* @widget's coordinate system into @target's coordinate system.
*
* The transform can not be computed in certain cases, for example
* when @widget and @target do not share a common ancestor. In that
* case @out_transform gets set to the identity matrix.
*
* To learn more about widget coordinate systems, see the coordinate
* system [overview](coordinates.html).
*
* Returns: %TRUE if the transform could be computed, %FALSE otherwise
*/
gboolean
gtk_widget_compute_transform (GtkWidget *widget,
GtkWidget *target,
graphene_matrix_t *out_transform)
{
GtkWidget *ancestor, *iter;
graphene_matrix_t transform, inverse, tmp;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (target), FALSE);
g_return_val_if_fail (out_transform != NULL, FALSE);
if (widget->priv->root != target->priv->root)
return FALSE;
/* optimization for common case: parent wants coordinates of a direct child */
if (target == widget->priv->parent)
{
gsk_transform_to_matrix (widget->priv->transform, out_transform);
return TRUE;
}
ancestor = gtk_widget_common_ancestor (widget, target);
if (ancestor == NULL)
{
graphene_matrix_init_identity (out_transform);
return FALSE;
}
graphene_matrix_init_identity (&transform);
for (iter = widget; iter != ancestor; iter = iter->priv->parent)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (iter);
gsk_transform_to_matrix (priv->transform, &tmp);
graphene_matrix_multiply (&transform, &tmp, &transform);
}
/* optimization for common case: parent wants coordinates of a non-direct child */
if (ancestor == target)
{
graphene_matrix_init_from_matrix (out_transform, &transform);
return TRUE;
}
graphene_matrix_init_identity (&inverse);
for (iter = target; iter != ancestor; iter = iter->priv->parent)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (iter);
gsk_transform_to_matrix (priv->transform, &tmp);
graphene_matrix_multiply (&inverse, &tmp, &inverse);
}
if (!graphene_matrix_inverse (&inverse, &inverse))
{
graphene_matrix_init_identity (out_transform);
return FALSE;
}
graphene_matrix_multiply (&transform, &inverse, out_transform);
return TRUE;
}
/**
* gtk_widget_compute_bounds:
* @widget: the `GtkWidget` to query
* @target: the `GtkWidget`
* @out_bounds: (out caller-allocates): the rectangle taking the bounds
*
* Computes the bounds for @widget in the coordinate space of @target.
*
* The bounds of widget are (the bounding box of) the region that it is
* expected to draw in. See the [coordinate system](coordinates.html)
* overview to learn more.
*
* If the operation is successful, %TRUE is returned. If @widget has no
* bounds or the bounds cannot be expressed in @target's coordinate space
* (for example if both widgets are in different windows), %FALSE is
* returned and @bounds is set to the zero rectangle.
*
* It is valid for @widget and @target to be the same widget.
*
* Returns: %TRUE if the bounds could be computed
*/
gboolean
gtk_widget_compute_bounds (GtkWidget *widget,
GtkWidget *target,
graphene_rect_t *out_bounds)
{
graphene_matrix_t transform;
GtkCssBoxes boxes;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (target), FALSE);
g_return_val_if_fail (out_bounds != NULL, FALSE);
if (!gtk_widget_compute_transform (widget, target, &transform))
{
graphene_rect_init_from_rect (out_bounds, graphene_rect_zero ());
return FALSE;
}
gtk_css_boxes_init (&boxes, widget);
gsk_matrix_transform_bounds (&transform,
gtk_css_boxes_get_border_rect (&boxes),
out_bounds);
return TRUE;
}
/**
* gtk_widget_get_allocated_width:
* @widget: the widget to query
*
* Returns the width that has currently been allocated to @widget.
*
* To learn more about widget sizes, see the coordinate
* system [overview](coordinates.html).
*
* Returns: the width of the @widget
*
* Deprecated: 4.12: Use [method@Gtk.Widget.get_width] instead
*/
int
gtk_widget_get_allocated_width (GtkWidget *widget)
{
GtkCssBoxes boxes;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
gtk_css_boxes_init (&boxes, widget);
return gtk_css_boxes_get_margin_rect (&boxes)->size.width;
}
/**
* gtk_widget_get_allocated_height:
* @widget: the widget to query
*
* Returns the height that has currently been allocated to @widget.
*
* To learn more about widget sizes, see the coordinate
* system [overview](coordinates.html).
*
* Returns: the height of the @widget
*
* Deprecated: 4.12: Use [method@Gtk.Widget.get_height] instead
*/
int
gtk_widget_get_allocated_height (GtkWidget *widget)
{
GtkCssBoxes boxes;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
gtk_css_boxes_init (&boxes, widget);
return gtk_css_boxes_get_margin_rect (&boxes)->size.height;
}
/**
* gtk_widget_get_allocated_baseline:
* @widget: the widget to query
*
* Returns the baseline that has currently been allocated to @widget.
*
* This function is intended to be used when implementing handlers
* for the `GtkWidget`Class.snapshot() function, and when allocating
* child widgets in `GtkWidget`Class.size_allocate().
*
* Returns: the baseline of the @widget, or -1 if none
*
* Deprecated: 4.12: Use [method@Gtk.Widget.get_baseline] instead
*/
int
gtk_widget_get_allocated_baseline (GtkWidget *widget)
{
return gtk_widget_get_baseline (widget);
}
/**
* gtk_widget_get_baseline:
* @widget: the widget to query
*
* Returns the baseline that has currently been allocated to @widget.
*
* This function is intended to be used when implementing handlers
* for the `GtkWidget`Class.snapshot() function, and when allocating
* child widgets in `GtkWidget`Class.size_allocate().
*
* Returns: the baseline of the @widget, or -1 if none
*
* Since: 4.12
*/
int
gtk_widget_get_baseline (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkCssStyle *style;
GtkBorder margin, border, padding;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
if (priv->baseline == -1)
return -1;
style = gtk_css_node_get_style (priv->cssnode);
get_box_margin (style, &margin);
get_box_border (style, &border);
get_box_padding (style, &padding);
return priv->baseline - margin.top - border.top - padding.top;
}
/**
* gtk_widget_set_opacity: (attributes org.gtk.Method.set_property=opacity)
* @widget: a `GtkWidget`
* @opacity: desired opacity, between 0 and 1
*
* Request the @widget to be rendered partially transparent.
*
* An opacity of 0 is fully transparent and an opacity of 1
* is fully opaque.
*
* Opacity works on both toplevel widgets and child widgets, although
* there are some limitations: For toplevel widgets, applying opacity
* depends on the capabilities of the windowing system. On X11, this
* has any effect only on X displays with a compositing manager,
* see gdk_display_is_composited(). On Windows and Wayland it should
* always work, although setting a window’s opacity after the window
* has been shown may cause some flicker.
*
* Note that the opacity is inherited through inclusion — if you set
* a toplevel to be partially translucent, all of its content will
* appear translucent, since it is ultimatively rendered on that
* toplevel. The opacity value itself is not inherited by child
* widgets (since that would make widgets deeper in the hierarchy
* progressively more translucent). As a consequence, [class@Gtk.Popover]s
* and other [iface@Gtk.Native] widgets with their own surface will use their
* own opacity value, and thus by default appear non-translucent,
* even if they are attached to a toplevel that is translucent.
*/
void
gtk_widget_set_opacity (GtkWidget *widget,
double opacity)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
guint8 alpha;
g_return_if_fail (GTK_IS_WIDGET (widget));
opacity = CLAMP (opacity, 0.0, 1.0);
alpha = round (opacity * 255);
if (alpha == priv->user_alpha)
return;
priv->user_alpha = alpha;
gtk_widget_queue_draw (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_OPACITY]);
}
/**
* gtk_widget_get_opacity: (attributes org.gtk.Method.get_property=opacity)
* @widget: a `GtkWidget`
*
* #Fetches the requested opacity for this widget.
*
* See [method@Gtk.Widget.set_opacity].
*
* Returns: the requested opacity for this widget.
*/
double
gtk_widget_get_opacity (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0.0);
return priv->user_alpha / 255.0;
}
/**
* gtk_widget_set_overflow: (attributes org.gtk.Method.set_property=overflow)
* @widget: a `GtkWidget`
* @overflow: desired overflow
*
* Sets how @widget treats content that is drawn outside the
* widget's content area.
*
* See the definition of [enum@Gtk.Overflow] for details.
*
* This setting is provided for widget implementations and
* should not be used by application code.
*
* The default value is %GTK_OVERFLOW_VISIBLE.
*/
void
gtk_widget_set_overflow (GtkWidget *widget,
GtkOverflow overflow)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (priv->overflow == overflow)
return;
priv->overflow = overflow;
gtk_widget_queue_draw (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_OVERFLOW]);
}
/**
* gtk_widget_get_overflow: (attributes org.gtk.Method.get_property=overflow)
* @widget: a `GtkWidget`
*
* Returns the widget’s overflow value.
*
* Returns: The widget's overflow.
**/
GtkOverflow
gtk_widget_get_overflow (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), GTK_OVERFLOW_VISIBLE);
return priv->overflow;
}
void
gtk_widget_set_has_focus (GtkWidget *widget,
gboolean has_focus)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->has_focus == has_focus)
return;
priv->has_focus = has_focus;
gtk_accessible_platform_changed (GTK_ACCESSIBLE (widget), GTK_ACCESSIBLE_PLATFORM_CHANGE_FOCUSED);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_HAS_FOCUS]);
}
/**
* gtk_widget_in_destruction:
* @widget: a `GtkWidget`
*
* Returns whether the widget is currently being destroyed.
*
* This information can sometimes be used to avoid doing
* unnecessary work.
*
* Returns: %TRUE if @widget is being destroyed
*/
gboolean
gtk_widget_in_destruction (GtkWidget *widget)
{
GtkWidgetPrivate *priv;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
priv = gtk_widget_get_instance_private (widget);
return priv->in_destruction;
}
gboolean
_gtk_widget_get_alloc_needed (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
return priv->alloc_needed;
}
static void
gtk_widget_set_alloc_needed (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->alloc_needed = TRUE;
do
{
if (priv->alloc_needed_on_child)
break;
priv->alloc_needed_on_child = TRUE;
if (!priv->visible)
break;
if (GTK_IS_NATIVE (widget))
{
gtk_native_queue_relayout (GTK_NATIVE (widget));
return;
}
widget = priv->parent;
if (widget == NULL)
break;
priv = widget->priv;
}
while (TRUE);
}
gboolean
gtk_widget_needs_allocate (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!priv->visible || !priv->child_visible)
return FALSE;
if (priv->resize_needed || priv->alloc_needed || priv->alloc_needed_on_child)
return TRUE;
return FALSE;
}
void
gtk_widget_ensure_allocate (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!gtk_widget_needs_allocate (widget))
return;
gtk_widget_ensure_resize (widget);
/* This code assumes that we only reach here if the previous
* allocation is still valid (ie no resize was queued).
* If that wasn't true, the parent would have taken care of
* things.
*/
if (priv->alloc_needed)
{
gtk_widget_allocate (widget,
priv->allocated_width,
priv->allocated_height,
priv->allocated_baseline,
gsk_transform_ref (priv->allocated_transform));
}
else
{
gtk_widget_ensure_allocate_on_children (widget);
}
}
void
gtk_widget_ensure_resize (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!priv->resize_needed)
return;
priv->resize_needed = FALSE;
}
void
_gtk_widget_add_sizegroup (GtkWidget *widget,
gpointer group)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GSList *groups;
groups = g_object_get_qdata (G_OBJECT (widget), quark_size_groups);
groups = g_slist_prepend (groups, group);
g_object_set_qdata (G_OBJECT (widget), quark_size_groups, groups);
priv->have_size_groups = TRUE;
}
void
_gtk_widget_remove_sizegroup (GtkWidget *widget,
gpointer group)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GSList *groups;
groups = g_object_get_qdata (G_OBJECT (widget), quark_size_groups);
groups = g_slist_remove (groups, group);
g_object_set_qdata (G_OBJECT (widget), quark_size_groups, groups);
priv->have_size_groups = groups != NULL;
}
GSList *
_gtk_widget_get_sizegroups (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->have_size_groups)
return g_object_get_qdata (G_OBJECT (widget), quark_size_groups);
return NULL;
}
/**
* gtk_widget_class_set_css_name:
* @widget_class: class to set the name on
* @name: name to use
*
* Sets the name to be used for CSS matching of widgets.
*
* If this function is not called for a given class, the name
* set on the parent class is used. By default, `GtkWidget`
* uses the name "widget".
*/
void
gtk_widget_class_set_css_name (GtkWidgetClass *widget_class,
const char *name)
{
GtkWidgetClassPrivate *priv;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (name != NULL);
priv = widget_class->priv;
priv->css_name = g_quark_from_string (name);
}
/**
* gtk_widget_class_get_css_name:
* @widget_class: class to set the name on
*
* Gets the name used by this class for matching in CSS code.
*
* See [method@Gtk.WidgetClass.set_css_name] for details.
*
* Returns: the CSS name of the given class
*/
const char *
gtk_widget_class_get_css_name (GtkWidgetClass *widget_class)
{
g_return_val_if_fail (GTK_IS_WIDGET_CLASS (widget_class), NULL);
return g_quark_to_string (widget_class->priv->css_name);
}
void
gtk_widget_css_changed (GtkWidget *widget,
GtkCssStyleChange *change)
{
GTK_WIDGET_GET_CLASS (widget)->css_changed (widget, change);
}
void
gtk_widget_system_setting_changed (GtkWidget *widget,
GtkSystemSetting setting)
{
GTK_WIDGET_GET_CLASS (widget)->system_setting_changed (widget, setting);
}
void
gtk_system_setting_changed (GdkDisplay *display,
GtkSystemSetting setting)
{
GList *list, *toplevels;
toplevels = gtk_window_list_toplevels ();
g_list_foreach (toplevels, (GFunc) g_object_ref, NULL);
for (list = toplevels; list; list = list->next)
{
if (gtk_widget_get_display (list->data) == display)
gtk_widget_system_setting_changed (list->data, setting);
g_object_unref (list->data);
}
g_list_free (toplevels);
}
GtkCssNode *
gtk_widget_get_css_node (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
return priv->cssnode;
}
GtkStyleContext *
_gtk_widget_peek_style_context (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
return priv->context;
}
/**
* gtk_widget_get_style_context:
* @widget: a `GtkWidget`
*
* Returns the style context associated to @widget.
*
* The returned object is guaranteed to be the same
* for the lifetime of @widget.
*
* Returns: (transfer none): the widget’s `GtkStyleContext`
*
* Deprecated: 4.10: Style contexts will be removed in GTK 5
*/
GtkStyleContext *
gtk_widget_get_style_context (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (G_UNLIKELY (priv->context == NULL))
{
GdkDisplay *display;
priv->context = gtk_style_context_new_for_node (priv->cssnode);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_style_context_set_scale (priv->context, gtk_widget_get_scale_factor (widget));
display = _gtk_widget_get_display (widget);
if (display)
gtk_style_context_set_display (priv->context, display);
G_GNUC_END_IGNORE_DEPRECATIONS
}
return priv->context;
}
static GtkActionMuxer *
gtk_widget_get_parent_muxer (GtkWidget *widget,
gboolean create)
{
GtkWidget *parent;
if (GTK_IS_WINDOW (widget))
return gtk_application_get_parent_muxer_for_window ((GtkWindow *)widget);
parent = _gtk_widget_get_parent (widget);
if (parent)
return _gtk_widget_get_action_muxer (parent, create);
return NULL;
}
void
_gtk_widget_update_parent_muxer (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkWidget *child;
if (priv->muxer == NULL)
return;
gtk_action_muxer_set_parent (priv->muxer,
gtk_widget_get_parent_muxer (widget, FALSE));
for (child = gtk_widget_get_first_child (widget);
child != NULL;
child = gtk_widget_get_next_sibling (child))
_gtk_widget_update_parent_muxer (child);
}
GtkActionMuxer *
_gtk_widget_get_action_muxer (GtkWidget *widget,
gboolean create)
{
GtkWidgetClass *widget_class = GTK_WIDGET_GET_CLASS (widget);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (priv->muxer)
return priv->muxer;
if (create || widget_class->priv->actions)
{
priv->muxer = gtk_action_muxer_new (widget);
_gtk_widget_update_parent_muxer (widget);
return priv->muxer;
}
else
return gtk_widget_get_parent_muxer (widget, FALSE);
}
/**
* gtk_widget_insert_action_group:
* @widget: a `GtkWidget`
* @name: the prefix for actions in @group
* @group: (nullable): a `GActionGroup`, or %NULL to remove
* the previously inserted group for @name
*
* Inserts @group into @widget.
*
* Children of @widget that implement [iface@Gtk.Actionable] can
* then be associated with actions in @group by setting their
* “action-name” to @prefix.`action-name`.
*
* Note that inheritance is defined for individual actions. I.e.
* even if you insert a group with prefix @prefix, actions with
* the same prefix will still be inherited from the parent, unless
* the group contains an action with the same name.
*
* If @group is %NULL, a previously inserted group for @name is
* removed from @widget.
*/
void
gtk_widget_insert_action_group (GtkWidget *widget,
const char *name,
GActionGroup *group)
{
GtkActionMuxer *muxer;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (name != NULL);
muxer = _gtk_widget_get_action_muxer (widget, TRUE);
if (group)
gtk_action_muxer_insert (muxer, name, group);
else
gtk_action_muxer_remove (muxer, name);
}
/****************************************************************
* GtkBuilder automated templates *
****************************************************************/
static AutomaticChildClass *
template_child_class_new (const char *name,
gboolean internal_child,
gssize offset)
{
AutomaticChildClass *child_class = g_new0 (AutomaticChildClass, 1);
child_class->name = g_strdup (name);
child_class->internal_child = internal_child;
child_class->offset = offset;
return child_class;
}
static GHashTable *
get_auto_child_hash (GtkWidget *widget,
GType type,
gboolean create)
{
GHashTable *auto_children;
GHashTable *auto_child_hash;
auto_children = (GHashTable *)g_object_get_qdata (G_OBJECT (widget), quark_auto_children);
if (auto_children == NULL)
{
if (!create)
return NULL;
auto_children = g_hash_table_new_full (g_direct_hash,
NULL,
NULL, (GDestroyNotify)g_hash_table_destroy);
g_object_set_qdata_full (G_OBJECT (widget),
quark_auto_children,
auto_children,
(GDestroyNotify)g_hash_table_destroy);
}
auto_child_hash =
g_hash_table_lookup (auto_children, GSIZE_TO_POINTER (type));
if (!auto_child_hash && create)
{
auto_child_hash = g_hash_table_new_full (g_str_hash,
g_str_equal,
NULL,
(GDestroyNotify)g_object_unref);
g_hash_table_insert (auto_children,
GSIZE_TO_POINTER (type),
auto_child_hash);
}
return auto_child_hash;
}
/**
* gtk_widget_init_template:
* @widget: a `GtkWidget`
*
* Creates and initializes child widgets defined in templates.
*
* This function must be called in the instance initializer
* for any class which assigned itself a template using
* [method@Gtk.WidgetClass.set_template].
*
* It is important to call this function in the instance initializer
* of a `GtkWidget` subclass and not in `GObject.constructed()` or
* `GObject.constructor()` for two reasons:
*
* - derived widgets will assume that the composite widgets
* defined by its parent classes have been created in their
* relative instance initializers
* - when calling `g_object_new()` on a widget with composite templates,
* it’s important to build the composite widgets before the construct
* properties are set. Properties passed to `g_object_new()` should
* take precedence over properties set in the private template XML
*
* A good rule of thumb is to call this function as the first thing in
* an instance initialization function.
*/
void
gtk_widget_init_template (GtkWidget *widget)
{
GtkWidgetTemplate *template;
GtkBuilder *builder;
GError *error = NULL;
GObject *object;
GSList *l;
GType class_type;
g_return_if_fail (GTK_IS_WIDGET (widget));
object = G_OBJECT (widget);
class_type = G_OBJECT_TYPE (widget);
template = GTK_WIDGET_GET_CLASS (widget)->priv->template;
g_return_if_fail (template != NULL);
builder = gtk_builder_new ();
if (template->scope)
gtk_builder_set_scope (builder, template->scope);
gtk_builder_set_current_object (builder, object);
/* This will build the template XML as children to the widget instance, also it
* will validate that the template is created for the correct GType and assert that
* there is no infinite recursion.
*/
if (!gtk_builder_extend_with_template (builder, object, class_type,
(const char *)g_bytes_get_data (template->data, NULL),
g_bytes_get_size (template->data),
&error))
{
/* This should never happen, if the template XML cannot be built
* then it is a critical programming error.
*/
g_critical ("Error building template class '%s' for an instance of type '%s': %s",
g_type_name (class_type), G_OBJECT_TYPE_NAME (object), error->message);
g_error_free (error);
goto out;
}
/* Build the automatic child data */
for (l = template->children; l; l = l->next)
{
AutomaticChildClass *child_class = l->data;
GHashTable *auto_child_hash;
GObject *child;
/* This will setup the pointer of an automated child, and cause
* it to be available in any GtkBuildable.get_internal_child()
* invocations which may follow by reference in child classes. */
child = gtk_builder_get_object (builder, child_class->name);
if (!child)
{
g_critical ("Unable to retrieve child object '%s' from class "
"template for type '%s' while building a '%s'",
child_class->name, g_type_name (class_type), G_OBJECT_TYPE_NAME (widget));
goto out;
}
/* Insert into the hash so that it can be fetched with
* gtk_widget_get_template_child() and also in automated
* implementations of GtkBuildable.get_internal_child() */
auto_child_hash = get_auto_child_hash (widget, class_type, TRUE);
g_hash_table_insert (auto_child_hash, child_class->name, g_object_ref (child));
if (child_class->offset != 0)
{
gpointer field_p;
/* Assign 'object' to the specified offset in the instance (or private) data */
field_p = G_STRUCT_MEMBER_P (widget, child_class->offset);
(* (gpointer *) field_p) = child;
}
}
out:
g_object_unref (builder);
}
/**
* gtk_widget_dispose_template:
* @widget: the widget with a template
* @widget_type: the type of the widget to finalize the template for
*
* Clears the template children for the given widget.
*
* This function is the opposite of [method@Gtk.Widget.init_template], and
* it is used to clear all the template children from a widget instance.
* If you bound a template child to a field in the instance structure, or
* in the instance private data structure, the field will be set to `NULL`
* after this function returns.
*
* You should call this function inside the `GObjectClass.dispose()`
* implementation of any widget that called `gtk_widget_init_template()`.
* Typically, you will want to call this function last, right before
* chaining up to the parent type's dispose implementation, e.g.
*
* ```c
* static void
* some_widget_dispose (GObject *gobject)
* {
* SomeWidget *self = SOME_WIDGET (gobject);
*
* // Clear the template data for SomeWidget
* gtk_widget_dispose_template (GTK_WIDGET (self), SOME_TYPE_WIDGET);
*
* G_OBJECT_CLASS (some_widget_parent_class)->dispose (gobject);
* }
* ```
*
* Since: 4.8
*/
void
gtk_widget_dispose_template (GtkWidget *widget,
GType widget_type)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (g_type_name (widget_type) != NULL);
GObjectClass *object_class = g_type_class_peek (widget_type);
GtkWidgetTemplate *template = GTK_WIDGET_CLASS (object_class)->priv->template;
g_return_if_fail (template != NULL);
/* Tear down the automatic child data */
GHashTable *auto_child_hash = get_auto_child_hash (widget, widget_type, FALSE);
for (GSList *l = template->children; l != NULL; l = l->next)
{
AutomaticChildClass *child_class = l->data;
/* This will drop the reference on the template children */
if (auto_child_hash != NULL)
{
gpointer child = g_hash_table_lookup (auto_child_hash, child_class->name);
g_assert (child != NULL);
/* We have to explicitly unparent direct children of this widget */
if (GTK_IS_WIDGET (child) && _gtk_widget_get_parent (child) == widget)
gtk_widget_unparent (child);
g_hash_table_remove (auto_child_hash, child_class->name);
}
/* Nullify the field last, to avoid re-entrancy issues */
if (child_class->offset != 0)
{
gpointer field_p;
field_p = G_STRUCT_MEMBER_P (widget, child_class->offset);
(* (gpointer *) field_p) = NULL;
}
}
}
/**
* gtk_widget_class_set_template:
* @widget_class: A `GtkWidgetClass`
* @template_bytes: A `GBytes` holding the `GtkBuilder` XML
*
* This should be called at class initialization time to specify
* the `GtkBuilder` XML to be used to extend a widget.
*
* For convenience, [method@Gtk.WidgetClass.set_template_from_resource]
* is also provided.
*
* Note that any class that installs templates must call
* [method@Gtk.Widget.init_template] in the widget’s instance initializer.
*/
void
gtk_widget_class_set_template (GtkWidgetClass *widget_class,
GBytes *template_bytes)
{
GError *error = NULL;
GBytes *data = NULL;
gconstpointer bytes_data;
gsize bytes_size;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (widget_class->priv->template == NULL);
g_return_if_fail (template_bytes != NULL);
widget_class->priv->template = g_new0 (GtkWidgetTemplate, 1);
bytes_data = g_bytes_get_data (template_bytes, &bytes_size);
if (_gtk_buildable_parser_is_precompiled (bytes_data, bytes_size))
{
widget_class->priv->template->data = g_bytes_ref (template_bytes);
return;
}
data = _gtk_buildable_parser_precompile (bytes_data, bytes_size, &error);
if (data == NULL)
{
g_warning ("Failed to precompile template for class %s: %s", G_OBJECT_CLASS_NAME (widget_class), error->message);
g_error_free (error);
return;
}
widget_class->priv->template->data = data;
}
/**
* gtk_widget_class_set_template_from_resource:
* @widget_class: A `GtkWidgetClass`
* @resource_name: The name of the resource to load the template from
*
* A convenience function that calls [method@Gtk.WidgetClass.set_template]
* with the contents of a `GResource`.
*
* Note that any class that installs templates must call
* [method@Gtk.Widget.init_template] in the widget’s instance
* initializer.
*/
void
gtk_widget_class_set_template_from_resource (GtkWidgetClass *widget_class,
const char *resource_name)
{
GError *error = NULL;
GBytes *bytes = NULL;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (widget_class->priv->template == NULL);
g_return_if_fail (resource_name && resource_name[0]);
/* This is a hack, because class initializers now access resources
* and GIR/gtk-doc initializes classes without initializing GTK,
* we ensure that our base resources are registered here and
* avoid warnings which building GIRs/documentation.
*/
_gtk_ensure_resources ();
bytes = g_resources_lookup_data (resource_name, 0, &error);
if (!bytes)
{
g_critical ("Unable to load resource for composite template for type '%s': %s",
G_OBJECT_CLASS_NAME (widget_class), error->message);
g_error_free (error);
return;
}
gtk_widget_class_set_template (widget_class, bytes);
g_bytes_unref (bytes);
}
/**
* gtk_widget_class_bind_template_callback_full:
* @widget_class: A `GtkWidgetClass`
* @callback_name: The name of the callback as expected in the template XML
* @callback_symbol: (scope async): The callback symbol
*
* Declares a @callback_symbol to handle @callback_name from
* the template XML defined for @widget_type.
*
* This function is not supported after [method@Gtk.WidgetClass.set_template_scope]
* has been used on @widget_class. See [method@Gtk.BuilderCScope.add_callback_symbol].
*
* Note that this must be called from a composite widget classes
* class initializer after calling [method@Gtk.WidgetClass.set_template].
*/
void
gtk_widget_class_bind_template_callback_full (GtkWidgetClass *widget_class,
const char *callback_name,
GCallback callback_symbol)
{
GtkWidgetTemplate *template;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (widget_class->priv->template != NULL);
g_return_if_fail (callback_name && callback_name[0]);
g_return_if_fail (callback_symbol != NULL);
template = widget_class->priv->template;
if (template->scope == NULL)
template->scope = gtk_builder_cscope_new ();
if (GTK_IS_BUILDER_CSCOPE (template->scope))
{
gtk_builder_cscope_add_callback_symbol (GTK_BUILDER_CSCOPE (template->scope),
callback_name,
callback_symbol);
}
else
{
g_critical ("Adding a callback to %s, but scope is not a GtkBuilderCScope.", G_OBJECT_CLASS_NAME (widget_class));
}
}
/**
* gtk_widget_class_set_template_scope:
* @widget_class: A `GtkWidgetClass`
* @scope: (transfer none): The `GtkBuilderScope` to use when loading
* the class template
*
* For use in language bindings, this will override the default
* `GtkBuilderScope` to be used when parsing GtkBuilder XML from
* this class’s template data.
*
* Note that this must be called from a composite widget classes class
* initializer after calling [method@Gtk.WidgetClass.set_template].
*/
void
gtk_widget_class_set_template_scope (GtkWidgetClass *widget_class,
GtkBuilderScope *scope)
{
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (widget_class->priv->template != NULL);
g_return_if_fail (GTK_IS_BUILDER_SCOPE (scope));
/* Defensive, destroy any previously set data */
g_set_object (&widget_class->priv->template->scope, scope);
}
/**
* gtk_widget_class_bind_template_child_full:
* @widget_class: A `GtkWidgetClass`
* @name: The “id” of the child defined in the template XML
* @internal_child: Whether the child should be accessible as an “internal-child”
* when this class is used in GtkBuilder XML
* @struct_offset: The structure offset into the composite widget’s instance
* public or private structure where the automated child pointer should be set,
* or 0 to not assign the pointer.
*
* Automatically assign an object declared in the class template XML to
* be set to a location on a freshly built instance’s private data, or
* alternatively accessible via [method@Gtk.Widget.get_template_child].
*
* The struct can point either into the public instance, then you should
* use `G_STRUCT_OFFSET(WidgetType, member)` for @struct_offset, or in the
* private struct, then you should use `G_PRIVATE_OFFSET(WidgetType, member)`.
*
* An explicit strong reference will be held automatically for the duration
* of your instance’s life cycle, it will be released automatically when
* `GObjectClass.dispose()` runs on your instance and if a @struct_offset
* that is `!= 0` is specified, then the automatic location in your instance
* public or private data will be set to %NULL. You can however access an
* automated child pointer the first time your classes `GObjectClass.dispose()`
* runs, or alternatively in [signal@Gtk.Widget::destroy].
*
* If @internal_child is specified, [vfunc@Gtk.Buildable.get_internal_child]
* will be automatically implemented by the `GtkWidget` class so there is no
* need to implement it manually.
*
* The wrapper macros [func@Gtk.widget_class_bind_template_child],
* [func@Gtk.widget_class_bind_template_child_internal],
* [func@Gtk.widget_class_bind_template_child_private] and
* [func@Gtk.widget_class_bind_template_child_internal_private]
* might be more convenient to use.
*
* Note that this must be called from a composite widget classes class
* initializer after calling [method@Gtk.WidgetClass.set_template].
*/
void
gtk_widget_class_bind_template_child_full (GtkWidgetClass *widget_class,
const char *name,
gboolean internal_child,
gssize struct_offset)
{
AutomaticChildClass *child_class;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (widget_class->priv->template != NULL);
g_return_if_fail (name && name[0]);
child_class = template_child_class_new (name,
internal_child,
struct_offset);
widget_class->priv->template->children =
g_slist_prepend (widget_class->priv->template->children, child_class);
}
/**
* gtk_widget_get_template_child:
* @widget: A `GtkWidget`
* @widget_type: The `GType` to get a template child for
* @name: The “id” of the child defined in the template XML
*
* Fetch an object build from the template XML for @widget_type in
* this @widget instance.
*
* This will only report children which were previously declared
* with [method@Gtk.WidgetClass.bind_template_child_full] or one of its
* variants.
*
* This function is only meant to be called for code which is private
* to the @widget_type which declared the child and is meant for language
* bindings which cannot easily make use of the GObject structure offsets.
*
* Returns: (transfer none): The object built in the template XML with
* the id @name
*/
GObject *
gtk_widget_get_template_child (GtkWidget *widget,
GType widget_type,
const char *name)
{
GHashTable *auto_child_hash;
GObject *ret = NULL;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (g_type_name (widget_type) != NULL, NULL);
g_return_val_if_fail (name && name[0], NULL);
auto_child_hash = get_auto_child_hash (widget, widget_type, FALSE);
if (auto_child_hash)
ret = g_hash_table_lookup (auto_child_hash, name);
return ret;
}
/**
* gtk_widget_activate_action_variant: (rename-to gtk_widget_activate_action)
* @widget: a `GtkWidget`
* @name: the name of the action to activate
* @args: (nullable): parameters to use
*
* Looks up the action in the action groups associated with
* @widget and its ancestors, and activates it.
*
* If the action is in an action group added with
* [method@Gtk.Widget.insert_action_group], the @name is expected
* to be prefixed with the prefix that was used when the group was
* inserted.
*
* The arguments must match the actions expected parameter type,
* as returned by `g_action_get_parameter_type()`.
*
* Returns: %TRUE if the action was activated, %FALSE if the
* action does not exist.
*/
gboolean
gtk_widget_activate_action_variant (GtkWidget *widget,
const char *name,
GVariant *args)
{
GtkActionMuxer *muxer;
muxer = _gtk_widget_get_action_muxer (widget, FALSE);
if (muxer == NULL)
return FALSE;
if (!gtk_action_muxer_has_action (muxer, name))
return FALSE;
gtk_action_muxer_activate_action (muxer, name, args);
return TRUE;
}
/**
* gtk_widget_activate_action:
* @widget: a `GtkWidget`
* @name: the name of the action to activate
* @format_string: (nullable): GVariant format string for arguments
* @...: arguments, as given by format string
*
* Looks up the action in the action groups associated
* with @widget and its ancestors, and activates it.
*
* This is a wrapper around [method@Gtk.Widget.activate_action_variant]
* that constructs the @args variant according to @format_string.
*
* Returns: %TRUE if the action was activated, %FALSE if the action
* does not exist
*/
gboolean
gtk_widget_activate_action (GtkWidget *widget,
const char *name,
const char *format_string,
...)
{
GVariant *parameters = NULL;
gboolean result;
if (format_string != NULL)
{
va_list args;
va_start (args, format_string);
parameters = g_variant_new_va (format_string, NULL, &args);
va_end (args);
g_variant_ref_sink (parameters);
}
result = gtk_widget_activate_action_variant (widget, name, parameters);
g_clear_pointer (&parameters, g_variant_unref);
return result;
}
/**
* gtk_widget_activate_default:
* @widget: a `GtkWidget`
*
* Activates the `default.activate` action from @widget.
*/
void
gtk_widget_activate_default (GtkWidget *widget)
{
gtk_widget_activate_action (widget, "default.activate", NULL);
}
void
gtk_widget_cancel_event_sequence (GtkWidget *widget,
GtkGesture *gesture,
GdkEventSequence *sequence,
GtkEventSequenceState state)
{
gboolean handled = FALSE;
GtkWidget *event_widget;
gboolean cancel = TRUE;
GdkEvent *event;
handled = _gtk_widget_set_sequence_state_internal (widget, sequence,
state, gesture);
if (!handled || state != GTK_EVENT_SEQUENCE_CLAIMED)
return;
event = _gtk_widget_get_last_event (widget, sequence, &event_widget);
if (!event)
return;
while (event_widget)
{
if (event_widget == widget)
cancel = FALSE;
else if (cancel)
_gtk_widget_cancel_sequence (event_widget, sequence);
else
_gtk_widget_set_sequence_state_internal (event_widget, sequence,
GTK_EVENT_SEQUENCE_DENIED,
NULL);
event_widget = _gtk_widget_get_parent (event_widget);
}
}
/**
* gtk_widget_add_controller:
* @widget: a `GtkWidget`
* @controller: (transfer full): a `GtkEventController` that hasn't been
* added to a widget yet
*
* Adds @controller to @widget so that it will receive events.
*
* You will usually want to call this function right after
* creating any kind of [class@Gtk.EventController].
*/
void
gtk_widget_add_controller (GtkWidget *widget,
GtkEventController *controller)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
g_return_if_fail (gtk_event_controller_get_widget (controller) == NULL);
GTK_EVENT_CONTROLLER_GET_CLASS (controller)->set_widget (controller, widget);
priv->event_controllers = g_list_prepend (priv->event_controllers, controller);
if (priv->controller_observer)
gtk_list_list_model_item_added_at (priv->controller_observer, 0);
}
/**
* gtk_widget_remove_controller:
* @widget: a `GtkWidget`
* @controller: (transfer none): a `GtkEventController`
*
* Removes @controller from @widget, so that it doesn't process
* events anymore.
*
* It should not be used again.
*
* Widgets will remove all event controllers automatically when they
* are destroyed, there is normally no need to call this function.
*/
void
gtk_widget_remove_controller (GtkWidget *widget,
GtkEventController *controller)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *before, *list;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
g_return_if_fail (gtk_event_controller_get_widget (controller) == widget);
GTK_EVENT_CONTROLLER_GET_CLASS (controller)->unset_widget (controller);
list = g_list_find (priv->event_controllers, controller);
before = list->prev;
priv->event_controllers = g_list_delete_link (priv->event_controllers, list);
g_object_unref (controller);
if (priv->controller_observer)
gtk_list_list_model_item_removed (priv->controller_observer, before);
}
void
gtk_widget_reset_controllers (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GList *l;
/* Reset all controllers */
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller = l->data;
if (controller == NULL)
continue;
gtk_event_controller_reset (controller);
}
}
GtkEventController **
gtk_widget_list_controllers (GtkWidget *widget,
GtkPropagationPhase phase,
guint *out_n_controllers)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GPtrArray *controllers = g_ptr_array_new ();
GList *l;
g_assert (out_n_controllers);
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller = l->data;
if (gtk_event_controller_get_propagation_phase (controller) == phase)
g_ptr_array_add (controllers, controller);
}
*out_n_controllers = controllers->len;
return (GtkEventController **)g_ptr_array_free (controllers, FALSE);
}
static GskRenderNode *
gtk_widget_create_render_node (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkWidgetClass *klass = GTK_WIDGET_GET_CLASS (widget);
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkCssBoxes boxes;
GtkCssValue *filter_value;
double css_opacity, opacity;
GtkCssStyle *style;
style = gtk_css_node_get_style (priv->cssnode);
css_opacity = _gtk_css_number_value_get (style->other->opacity, 100);
opacity = CLAMP (css_opacity, 0.0, 1.0) * priv->user_alpha / 255.0;
if (opacity <= 0.0)
return NULL;
gtk_css_boxes_init (&boxes, widget);
gtk_snapshot_push_collect (snapshot);
gtk_snapshot_push_debug (snapshot,
"RenderNode for %s %p",
G_OBJECT_TYPE_NAME (widget), widget);
filter_value = style->other->filter;
gtk_css_filter_value_push_snapshot (filter_value, snapshot);
if (opacity < 1.0)
gtk_snapshot_push_opacity (snapshot, opacity);
gtk_css_style_snapshot_background (&boxes, snapshot);
gtk_css_style_snapshot_border (&boxes, snapshot);
if (priv->overflow == GTK_OVERFLOW_HIDDEN)
{
gtk_snapshot_push_rounded_clip (snapshot, gtk_css_boxes_get_padding_box (&boxes));
klass->snapshot (widget, snapshot);
gtk_snapshot_pop (snapshot);
}
else
{
klass->snapshot (widget, snapshot);
}
gtk_css_style_snapshot_outline (&boxes, snapshot);
if (opacity < 1.0)
gtk_snapshot_pop (snapshot);
gtk_css_filter_value_pop_snapshot (filter_value, snapshot);
gtk_snapshot_pop (snapshot);
return gtk_snapshot_pop_collect (snapshot);
}
static void
gtk_widget_do_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GskRenderNode *render_node;
if (!priv->draw_needed)
return;
g_assert (priv->mapped);
if (_gtk_widget_get_alloc_needed (widget))
{
g_warning ("Trying to snapshot %s %p without a current allocation", gtk_widget_get_name (widget), widget);
return;
}
gtk_widget_push_paintables (widget);
render_node = gtk_widget_create_render_node (widget, snapshot);
/* This can happen when nested drawing happens and a widget contains itself
* or when we replace a clipped area
*/
g_clear_pointer (&priv->render_node, gsk_render_node_unref);
priv->render_node = render_node;
priv->draw_needed = FALSE;
gtk_widget_pop_paintables (widget);
gtk_widget_update_paintables (widget);
}
void
gtk_widget_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (!_gtk_widget_get_mapped (widget))
return;
gtk_widget_do_snapshot (widget, snapshot);
if (priv->render_node)
gtk_snapshot_append_node (snapshot, priv->render_node);
}
void
gtk_widget_render (GtkWidget *widget,
GdkSurface *surface,
const cairo_region_t *region)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkSnapshot *snapshot;
GskRenderer *renderer;
GskRenderNode *root;
double x, y;
gint64 before_snapshot G_GNUC_UNUSED;
gint64 before_render G_GNUC_UNUSED;
before_snapshot = GDK_PROFILER_CURRENT_TIME;
before_render = 0;
if (!GTK_IS_NATIVE (widget))
return;
renderer = gtk_native_get_renderer (GTK_NATIVE (widget));
if (renderer == NULL)
return;
snapshot = gtk_snapshot_new ();
gtk_native_get_surface_transform (GTK_NATIVE (widget), &x, &y);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x, y));
gtk_widget_snapshot (widget, snapshot);
root = gtk_snapshot_free_to_node (snapshot);
if (GDK_PROFILER_IS_RUNNING)
{
before_render = GDK_PROFILER_CURRENT_TIME;
gdk_profiler_add_mark (before_snapshot, (before_render - before_snapshot), "widget snapshot", "");
}
if (root != NULL)
{
root = gtk_inspector_prepare_render (widget,
renderer,
surface,
region,
root,
priv->render_node);
gsk_renderer_render (renderer, root, region);
gsk_render_node_unref (root);
gdk_profiler_end_mark (before_render, "widget render", "");
}
}
static void
gtk_widget_child_observer_destroyed (gpointer widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->children_observer = NULL;
}
/**
* gtk_widget_observe_children:
* @widget: a `GtkWidget`
*
* Returns a `GListModel` to track the children of @widget.
*
* Calling this function will enable extra internal bookkeeping
* to track children and emit signals on the returned listmodel.
* It may slow down operations a lot.
*
* Applications should try hard to avoid calling this function
* because of the slowdowns.
*
* Returns: (transfer full) (attributes element-type=GtkWidget):
* a `GListModel` tracking @widget's children
*/
GListModel *
gtk_widget_observe_children (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (priv->children_observer)
return g_object_ref (G_LIST_MODEL (priv->children_observer));
priv->children_observer = gtk_list_list_model_new ((gpointer) gtk_widget_get_first_child,
(gpointer) gtk_widget_get_next_sibling,
(gpointer) gtk_widget_get_prev_sibling,
(gpointer) gtk_widget_get_last_child,
(gpointer) g_object_ref,
widget,
gtk_widget_child_observer_destroyed);
return G_LIST_MODEL (priv->children_observer);
}
static void
gtk_widget_controller_observer_destroyed (gpointer widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
priv->controller_observer = NULL;
}
static gpointer
gtk_widget_controller_list_get_first (gpointer widget)
{
return GTK_WIDGET (widget)->priv->event_controllers;
}
static gpointer
gtk_widget_controller_list_get_next (gpointer item,
gpointer widget)
{
return g_list_next (item);
}
static gpointer
gtk_widget_controller_list_get_prev (gpointer item,
gpointer widget)
{
return g_list_previous (item);
}
static gpointer
gtk_widget_controller_list_get_item (gpointer item,
gpointer widget)
{
return g_object_ref (((GList *) item)->data);
}
/**
* gtk_widget_observe_controllers:
* @widget: a `GtkWidget`
*
* Returns a `GListModel` to track the [class@Gtk.EventController]s
* of @widget.
*
* Calling this function will enable extra internal bookkeeping
* to track controllers and emit signals on the returned listmodel.
* It may slow down operations a lot.
*
* Applications should try hard to avoid calling this function
* because of the slowdowns.
*
* Returns: (transfer full) (attributes element-type=GtkEventController):
* a `GListModel` tracking @widget's controllers
*/
GListModel *
gtk_widget_observe_controllers (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (priv->controller_observer)
return g_object_ref (G_LIST_MODEL (priv->controller_observer));
priv->controller_observer = gtk_list_list_model_new (gtk_widget_controller_list_get_first,
gtk_widget_controller_list_get_next,
gtk_widget_controller_list_get_prev,
NULL,
gtk_widget_controller_list_get_item,
widget,
gtk_widget_controller_observer_destroyed);
return G_LIST_MODEL (priv->controller_observer);
}
/**
* gtk_widget_get_first_child:
* @widget: a `GtkWidget`
*
* Returns the widget’s first child.
*
* This API is primarily meant for widget implementations.
*
* Returns: (transfer none) (nullable): The widget's first child
*/
GtkWidget *
gtk_widget_get_first_child (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->first_child;
}
/**
* gtk_widget_get_last_child:
* @widget: a `GtkWidget`
*
* Returns the widget’s last child.
*
* This API is primarily meant for widget implementations.
*
* Returns: (transfer none) (nullable): The widget's last child
*/
GtkWidget *
gtk_widget_get_last_child (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->last_child;
}
/**
* gtk_widget_get_next_sibling:
* @widget: a `GtkWidget`
*
* Returns the widget’s next sibling.
*
* This API is primarily meant for widget implementations.
*
* Returns: (transfer none) (nullable): The widget's next sibling
*/
GtkWidget *
gtk_widget_get_next_sibling (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->next_sibling;
}
/**
* gtk_widget_get_prev_sibling:
* @widget: a `GtkWidget`
*
* Returns the widget’s previous sibling.
*
* This API is primarily meant for widget implementations.
*
* Returns: (transfer none) (nullable): The widget's previous sibling
*/
GtkWidget *
gtk_widget_get_prev_sibling (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->prev_sibling;
}
/**
* gtk_widget_insert_after:
* @widget: a `GtkWidget`
* @parent: the parent `GtkWidget` to insert @widget into
* @previous_sibling: (nullable): the new previous sibling of @widget
*
* Inserts @widget into the child widget list of @parent.
*
* It will be placed after @previous_sibling, or at the beginning if
* @previous_sibling is %NULL.
*
* After calling this function, `gtk_widget_get_prev_sibling(widget)`
* will return @previous_sibling.
*
* If @parent is already set as the parent widget of @widget, this
* function can also be used to reorder @widget in the child widget
* list of @parent.
*
* This API is primarily meant for widget implementations; if you are
* just using a widget, you *must* use its own API for adding children.
*/
void
gtk_widget_insert_after (GtkWidget *widget,
GtkWidget *parent,
GtkWidget *previous_sibling)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_WIDGET (parent));
g_return_if_fail (previous_sibling == NULL || GTK_IS_WIDGET (previous_sibling));
g_return_if_fail (previous_sibling == NULL || _gtk_widget_get_parent (previous_sibling) == parent);
if (widget == previous_sibling ||
(previous_sibling && _gtk_widget_get_prev_sibling (widget) == previous_sibling))
return;
if (!previous_sibling && _gtk_widget_get_first_child (parent) == widget)
return;
gtk_widget_reposition_after (widget,
parent,
previous_sibling);
}
/**
* gtk_widget_insert_before:
* @widget: a `GtkWidget`
* @parent: the parent `GtkWidget` to insert @widget into
* @next_sibling: (nullable): the new next sibling of @widget
*
* Inserts @widget into the child widget list of @parent.
*
* It will be placed before @next_sibling, or at the end if
* @next_sibling is %NULL.
*
* After calling this function, `gtk_widget_get_next_sibling(widget)`
* will return @next_sibling.
*
* If @parent is already set as the parent widget of @widget, this function
* can also be used to reorder @widget in the child widget list of @parent.
*
* This API is primarily meant for widget implementations; if you are
* just using a widget, you *must* use its own API for adding children.
*/
void
gtk_widget_insert_before (GtkWidget *widget,
GtkWidget *parent,
GtkWidget *next_sibling)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_WIDGET (parent));
g_return_if_fail (next_sibling == NULL || GTK_IS_WIDGET (next_sibling));
g_return_if_fail (next_sibling == NULL || _gtk_widget_get_parent (next_sibling) == parent);
if (widget == next_sibling ||
(next_sibling && _gtk_widget_get_next_sibling (widget) == next_sibling))
return;
if (!next_sibling && _gtk_widget_get_last_child (parent) == widget)
return;
gtk_widget_reposition_after (widget, parent,
next_sibling ? _gtk_widget_get_prev_sibling (next_sibling) :
_gtk_widget_get_last_child (parent));
}
void
gtk_widget_forall (GtkWidget *widget,
GtkCallback callback,
gpointer user_data)
{
GtkWidget *child;
g_return_if_fail (GTK_IS_WIDGET (widget));
child = _gtk_widget_get_first_child (widget);
while (child)
{
GtkWidget *next = _gtk_widget_get_next_sibling (child);
callback(child, user_data);
child = next;
}
}
/**
* gtk_widget_snapshot_child:
* @widget: a `GtkWidget`
* @child: a child of @widget
* @snapshot: `GtkSnapshot` as passed to the widget. In particular, no
* calls to gtk_snapshot_translate() or other transform calls should
* have been made.
*
* Snapshot the a child of @widget.
*
* When a widget receives a call to the snapshot function,
* it must send synthetic [vfunc@Gtk.Widget.snapshot] calls
* to all children. This function provides a convenient way
* of doing this. A widget, when it receives a call to its
* [vfunc@Gtk.Widget.snapshot] function, calls
* gtk_widget_snapshot_child() once for each child, passing in
* the @snapshot the widget received.
*
* gtk_widget_snapshot_child() takes care of translating the origin of
* @snapshot, and deciding whether the child needs to be snapshot.
*
* This function does nothing for children that implement `GtkNative`.
*/
void
gtk_widget_snapshot_child (GtkWidget *widget,
GtkWidget *child,
GtkSnapshot *snapshot)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (child);
g_return_if_fail (_gtk_widget_get_parent (child) == widget);
g_return_if_fail (snapshot != NULL);
if (!_gtk_widget_get_mapped (child))
return;
if (GTK_IS_NATIVE (child))
return;
gtk_widget_do_snapshot (child, snapshot);
if (!priv->render_node)
return;
if (priv->transform)
{
GskRenderNode *transform_node = gsk_transform_node_new (priv->render_node,
priv->transform);
gtk_snapshot_append_node (snapshot, transform_node);
gsk_render_node_unref (transform_node);
}
else
{
gtk_snapshot_append_node (snapshot, priv->render_node);
}
}
/**
* gtk_widget_set_focus_child:
* @widget: a `GtkWidget`
* @child: (nullable): a direct child widget of @widget or %NULL
* to unset the focus child of @widget
*
* Set @child as the current focus child of @widget.
*
* This function is only suitable for widget implementations.
* If you want a certain widget to get the input focus, call
* [method@Gtk.Widget.grab_focus] on it.
*/
void
gtk_widget_set_focus_child (GtkWidget *widget,
GtkWidget *child)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (child != NULL)
{
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (gtk_widget_get_parent (child) == widget);
}
GTK_WIDGET_GET_CLASS (widget)->set_focus_child (widget, child);
}
static void
gtk_widget_real_set_focus_child (GtkWidget *widget,
GtkWidget *child)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_set_object (&priv->focus_child, child);
}
/**
* gtk_widget_get_focus_child:
* @widget: a `GtkWidget`
*
* Returns the current focus child of @widget.
*
* Returns: (nullable) (transfer none): The current focus
* child of @widget
*/
GtkWidget *
gtk_widget_get_focus_child (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->focus_child;
}
/**
* gtk_widget_set_cursor: (attributes org.gtk.Method.set_property=cursor)
* @widget: a `GtkWidget`
* @cursor: (nullable): the new cursor
*
* Sets the cursor to be shown when pointer devices point
* towards @widget.
*
* If the @cursor is NULL, @widget will use the cursor
* inherited from the parent widget.
*/
void
gtk_widget_set_cursor (GtkWidget *widget,
GdkCursor *cursor)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkRoot *root;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cursor == NULL || GDK_IS_CURSOR (cursor));
if (!g_set_object (&priv->cursor, cursor))
return;
root = _gtk_widget_get_root (widget);
if (GTK_IS_WINDOW (root))
gtk_window_maybe_update_cursor (GTK_WINDOW (root), widget, NULL);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_CURSOR]);
}
/**
* gtk_widget_set_cursor_from_name:
* @widget: a `GtkWidget`
* @name: (nullable): The name of the cursor
*
* Sets a named cursor to be shown when pointer devices point
* towards @widget.
*
* This is a utility function that creates a cursor via
* [ctor@Gdk.Cursor.new_from_name] and then sets it on @widget
* with [method@Gtk.Widget.set_cursor]. See those functions for
* details.
*
* On top of that, this function allows @name to be %NULL, which
* will do the same as calling [method@Gtk.Widget.set_cursor]
* with a %NULL cursor.
*/
void
gtk_widget_set_cursor_from_name (GtkWidget *widget,
const char *name)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (name)
{
GdkCursor *cursor;
cursor = gdk_cursor_new_from_name (name, NULL);
gtk_widget_set_cursor (widget, cursor);
g_object_unref (cursor);
}
else
{
gtk_widget_set_cursor (widget, NULL);
}
}
/**
* gtk_widget_get_cursor: (attributes org.gtk.Method.get_property=cursor)
* @widget: a `GtkWidget`
*
* Queries the cursor set on @widget.
*
* See [method@Gtk.Widget.set_cursor] for details.
*
* Returns: (nullable) (transfer none): the cursor
* currently in use or %NULL if the cursor is inherited
*/
GdkCursor *
gtk_widget_get_cursor (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->cursor;
}
/**
* gtk_widget_set_can_target: (attributes org.gtk.Method.set_property=can-target)
* @widget: a `GtkWidget`
* @can_target: whether this widget should be able to
* receive pointer events
*
* Sets whether @widget can be the target of pointer events.
*/
void
gtk_widget_set_can_target (GtkWidget *widget,
gboolean can_target)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
can_target = !!can_target;
if (priv->can_target == can_target)
return;
priv->can_target = can_target;
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_CAN_TARGET]);
}
/**
* gtk_widget_get_can_target: (attributes org.gtk.Method.get_property=can-target)
* @widget: a `GtkWidget`
*
* Queries whether @widget can be the target of pointer events.
*
* Returns: %TRUE if @widget can receive pointer events
*/
gboolean
gtk_widget_get_can_target (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
return priv->can_target;
}
/**
* gtk_widget_get_width:
* @widget: a `GtkWidget`
*
* Returns the content width of the widget.
*
* This function returns the width passed to its
* size-allocate implementation, which is the width you
* should be using in [vfunc@Gtk.Widget.snapshot].
*
* For pointer events, see [method@Gtk.Widget.contains].
*
* To learn more about widget sizes, see the coordinate
* system [overview](coordinates.html).
*
* Returns: The width of @widget
*/
int
gtk_widget_get_width (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
return priv->width;
}
/**
* gtk_widget_get_height:
* @widget: a `GtkWidget`
*
* Returns the content height of the widget.
*
* This function returns the height passed to its
* size-allocate implementation, which is the height you
* should be using in [vfunc@Gtk.Widget.snapshot].
*
* For pointer events, see [method@Gtk.Widget.contains].
*
* To learn more about widget sizes, see the coordinate
* system [overview](coordinates.html).
*
* Returns: The height of @widget
*/
int
gtk_widget_get_height (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
return priv->height;
}
/**
* gtk_widget_get_size:
* @widget: a `GtkWidget`
* @orientation: the orientation to query
*
* Returns the content width or height of the widget.
*
* Which dimension is returned depends on @orientation.
*
* This is equivalent to calling [method@Gtk.Widget.get_width]
* for %GTK_ORIENTATION_HORIZONTAL or [method@Gtk.Widget.get_height]
* for %GTK_ORIENTATION_VERTICAL, but can be used when
* writing orientation-independent code, such as when
* implementing [iface@Gtk.Orientable] widgets.
*
* To learn more about widget sizes, see the coordinate
* system [overview](coordinates.html).
*
* Returns: The size of @widget in @orientation.
*/
int
gtk_widget_get_size (GtkWidget *widget,
GtkOrientation orientation)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
return priv->width;
else
return priv->height;
}
/**
* gtk_widget_class_set_layout_manager_type:
* @widget_class: a `GtkWidgetClass`
* @type: The object type that implements the `GtkLayoutManager`
* for @widget_class
*
* Sets the type to be used for creating layout managers for
* widgets of @widget_class.
*
* The given @type must be a subtype of [class@Gtk.LayoutManager].
*
* This function should only be called from class init functions
* of widgets.
*/
void
gtk_widget_class_set_layout_manager_type (GtkWidgetClass *widget_class,
GType type)
{
GtkWidgetClassPrivate *priv;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (g_type_is_a (type, GTK_TYPE_LAYOUT_MANAGER));
priv = widget_class->priv;
priv->layout_manager_type = type;
}
/**
* gtk_widget_class_get_layout_manager_type:
* @widget_class: a `GtkWidgetClass`
*
* Retrieves the type of the [class@Gtk.LayoutManager]
* used by widgets of class @widget_class.
*
* See also: [method@Gtk.WidgetClass.set_layout_manager_type].
*
* Returns: type of a `GtkLayoutManager` subclass, or %G_TYPE_INVALID
*/
GType
gtk_widget_class_get_layout_manager_type (GtkWidgetClass *widget_class)
{
GtkWidgetClassPrivate *priv;
g_return_val_if_fail (GTK_IS_WIDGET_CLASS (widget_class), G_TYPE_INVALID);
priv = widget_class->priv;
return priv->layout_manager_type;
}
/**
* gtk_widget_set_layout_manager: (attributes org.gtk.Method.set_property=layout-manager)
* @widget: a `GtkWidget`
* @layout_manager: (nullable) (transfer full): a `GtkLayoutManager`
*
* Sets the layout manager delegate instance that provides an
* implementation for measuring and allocating the children of @widget.
*/
void
gtk_widget_set_layout_manager (GtkWidget *widget,
GtkLayoutManager *layout_manager)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (layout_manager == NULL || GTK_IS_LAYOUT_MANAGER (layout_manager));
g_return_if_fail (layout_manager == NULL || gtk_layout_manager_get_widget (layout_manager) == NULL);
if (priv->layout_manager == layout_manager)
return;
if (priv->layout_manager)
{
gtk_layout_manager_set_widget (priv->layout_manager, NULL);
g_object_unref (priv->layout_manager);
}
priv->layout_manager = layout_manager;
if (priv->layout_manager != NULL)
gtk_layout_manager_set_widget (priv->layout_manager, widget);
gtk_widget_queue_resize (widget);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_LAYOUT_MANAGER]);
}
/**
* gtk_widget_get_layout_manager: (attributes org.gtk.Method.get_property=layout-manager)
* @widget: a `GtkWidget`
*
* Retrieves the layout manager used by @widget.
*
* See [method@Gtk.Widget.set_layout_manager].
*
* Returns: (transfer none) (nullable): a `GtkLayoutManager`
*/
GtkLayoutManager *
gtk_widget_get_layout_manager (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return priv->layout_manager;
}
/**
* gtk_widget_should_layout:
* @widget: a widget
*
* Returns whether @widget should contribute to
* the measuring and allocation of its parent.
*
* This is %FALSE for invisible children, but also
* for children that have their own surface.
*
* Returns: %TRUE if child should be included in
* measuring and allocating
*/
gboolean
gtk_widget_should_layout (GtkWidget *widget)
{
if (!_gtk_widget_get_visible (widget))
return FALSE;
if (GTK_IS_NATIVE (widget))
return FALSE;
return TRUE;
}
static void
gtk_widget_class_add_action (GtkWidgetClass *widget_class,
GtkWidgetAction *action)
{
GtkWidgetClassPrivate *priv = widget_class->priv;
GTK_DEBUG (ACTIONS, "%sClass: Adding %s action",
g_type_name (G_TYPE_FROM_CLASS (widget_class)),
action->name);
action->next = priv->actions;
priv->actions = action;
}
/**
* gtk_widget_class_install_action:
* @widget_class: a `GtkWidgetClass`
* @action_name: a prefixed action name, such as "clipboard.paste"
* @parameter_type: (nullable): the parameter type
* @activate: (scope notified): callback to use when the action is activated
*
* This should be called at class initialization time to specify
* actions to be added for all instances of this class.
*
* Actions installed by this function are stateless. The only state
* they have is whether they are enabled or not (which can be changed with
* [method@Gtk.Widget.action_set_enabled]).
*/
void
gtk_widget_class_install_action (GtkWidgetClass *widget_class,
const char *action_name,
const char *parameter_type,
GtkWidgetActionActivateFunc activate)
{
GtkWidgetAction *action;
action = g_new0 (GtkWidgetAction, 1);
action->owner = G_TYPE_FROM_CLASS (widget_class);
action->name = g_strdup (action_name);
if (parameter_type)
action->parameter_type = g_variant_type_new (parameter_type);
else
action->parameter_type = NULL;
action->activate = activate;
gtk_widget_class_add_action (widget_class, action);
}
static const GVariantType *
determine_type (GParamSpec *pspec)
{
if (G_TYPE_IS_ENUM (pspec->value_type))
return G_VARIANT_TYPE_STRING;
switch (pspec->value_type)
{
case G_TYPE_BOOLEAN:
return G_VARIANT_TYPE_BOOLEAN;
case G_TYPE_INT:
return G_VARIANT_TYPE_INT32;
case G_TYPE_UINT:
return G_VARIANT_TYPE_UINT32;
case G_TYPE_DOUBLE:
case G_TYPE_FLOAT:
return G_VARIANT_TYPE_DOUBLE;
case G_TYPE_STRING:
return G_VARIANT_TYPE_STRING;
default:
g_critical ("Unable to use gtk_widget_class_install_property_action with property '%s:%s' of type '%s'",
g_type_name (pspec->owner_type), pspec->name, g_type_name (pspec->value_type));
return NULL;
}
}
/**
* gtk_widget_class_install_property_action:
* @widget_class: a `GtkWidgetClass`
* @action_name: name of the action
* @property_name: name of the property in instances of @widget_class
* or any parent class.
*
* Installs an action called @action_name on @widget_class and
* binds its state to the value of the @property_name property.
*
* This function will perform a few sanity checks on the property selected
* via @property_name. Namely, the property must exist, must be readable,
* writable and must not be construct-only. There are also restrictions
* on the type of the given property, it must be boolean, int, unsigned int,
* double or string. If any of these conditions are not met, a critical
* warning will be printed and no action will be added.
*
* The state type of the action matches the property type.
*
* If the property is boolean, the action will have no parameter and
* toggle the property value. Otherwise, the action will have a parameter
* of the same type as the property.
*/
void
gtk_widget_class_install_property_action (GtkWidgetClass *widget_class,
const char *action_name,
const char *property_name)
{
GParamSpec *pspec;
GtkWidgetAction *action;
const GVariantType *state_type;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
pspec = g_object_class_find_property (G_OBJECT_CLASS (widget_class), property_name);
if (pspec == NULL)
{
g_critical ("Attempted to use non-existent property '%s:%s' for gtk_widget_class_install_property_action",
g_type_name (G_TYPE_FROM_CLASS (widget_class)), property_name);
return;
}
if (~pspec->flags & G_PARAM_READABLE || ~pspec->flags & G_PARAM_WRITABLE || pspec->flags & G_PARAM_CONSTRUCT_ONLY)
{
g_critical ("Property '%s:%s' used with gtk_widget_class_install_property_action must be readable, writable, and not construct-only",
g_type_name (G_TYPE_FROM_CLASS (widget_class)), property_name);
return;
}
state_type = determine_type (pspec);
if (!state_type)
return;
action = g_new0 (GtkWidgetAction, 1);
action->owner = G_TYPE_FROM_CLASS (widget_class);
action->name = g_strdup (action_name);
action->pspec = pspec;
action->state_type = state_type;
if (action->pspec->value_type == G_TYPE_BOOLEAN)
action->parameter_type = NULL;
else
action->parameter_type = action->state_type;
action->activate = NULL;
gtk_widget_class_add_action (widget_class, action);
}
/**
* gtk_widget_action_set_enabled:
* @widget: a `GtkWidget`
* @action_name: action name, such as "clipboard.paste"
* @enabled: whether the action is now enabled
*
* Enable or disable an action installed with
* gtk_widget_class_install_action().
*/
void
gtk_widget_action_set_enabled (GtkWidget *widget,
const char *action_name,
gboolean enabled)
{
GtkActionMuxer *muxer;
g_return_if_fail (GTK_IS_WIDGET (widget));
muxer = _gtk_widget_get_action_muxer (widget, TRUE);
gtk_action_muxer_action_enabled_changed (muxer, action_name, enabled);
}
/**
* gtk_widget_class_query_action:
* @widget_class: a `GtkWidget` class
* @index_: position of the action to query
* @owner: (out) (transfer none): return location for the type where the action was defined
* @action_name: (out) (transfer none): return location for the action name
* @parameter_type: (out) (transfer none) (nullable): return location for the parameter type
* @property_name: (out) (transfer none) (nullable): return location for the property name
*
* Returns details about the @index_-th action that has been
* installed for @widget_class during class initialization.
*
* See [method@Gtk.WidgetClass.install_action] for details on
* how to install actions.
*
* Note that this function will also return actions defined
* by parent classes. You can identify those by looking
* at @owner.
*
* Returns: %TRUE if the action was found, %FALSE if @index_
* is out of range
*/
gboolean
gtk_widget_class_query_action (GtkWidgetClass *widget_class,
guint index_,
GType *owner,
const char **action_name,
const GVariantType **parameter_type,
const char **property_name)
{
GtkWidgetClassPrivate *priv = widget_class->priv;
GtkWidgetAction *action = priv->actions;
for (; index_ > 0 && action != NULL; index_--)
action = action->next;
if (action != NULL && index_ == 0)
{
*owner = action->owner;
*action_name = action->name;
*parameter_type = action->parameter_type;
if (action->pspec)
*property_name = action->pspec->name;
else
*property_name = NULL;
return TRUE;
}
return FALSE;
}
/**
* gtk_widget_get_css_name: (attributes org.gtk.Method.get_property=css-name)
* @self: a `GtkWidget`
*
* Returns the CSS name that is used for @self.
*
* Returns: (transfer none): the CSS name
*/
const char *
gtk_widget_get_css_name (GtkWidget *self)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
g_return_val_if_fail (GTK_IS_WIDGET (self), NULL);
return g_quark_to_string (gtk_css_node_get_name (priv->cssnode));
}
/**
* gtk_widget_add_css_class:
* @widget: a `GtkWidget`
* @css_class: The style class to add to @widget, without
* the leading '.' used for notation of style classes
*
* Adds a style class to @widget.
*
* After calling this function, the widget’s style will match
* for @css_class, according to CSS matching rules.
*
* Use [method@Gtk.Widget.remove_css_class] to remove the
* style again.
*/
void
gtk_widget_add_css_class (GtkWidget *widget,
const char *css_class)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (css_class != NULL);
g_return_if_fail (css_class[0] != '\0');
g_return_if_fail (css_class[0] != '.');
gtk_css_node_add_class (priv->cssnode, g_quark_from_string (css_class));
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_CSS_CLASSES]);
}
/**
* gtk_widget_remove_css_class:
* @widget: a `GtkWidget`
* @css_class: The style class to remove from @widget, without
* the leading '.' used for notation of style classes
*
* Removes a style from @widget.
*
* After this, the style of @widget will stop matching for @css_class.
*/
void
gtk_widget_remove_css_class (GtkWidget *widget,
const char *css_class)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GQuark class_quark;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (css_class != NULL);
g_return_if_fail (css_class[0] != '\0');
g_return_if_fail (css_class[0] != '.');
class_quark = g_quark_try_string (css_class);
if (!class_quark)
return;
gtk_css_node_remove_class (priv->cssnode, class_quark);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_CSS_CLASSES]);
}
/**
* gtk_widget_has_css_class:
* @widget: a `GtkWidget`
* @css_class: A style class, without the leading '.'
* used for notation of style classes
*
* Returns whether @css_class is currently applied to @widget.
*
* Returns: %TRUE if @css_class is currently applied to @widget,
* %FALSE otherwise.
*/
gboolean
gtk_widget_has_css_class (GtkWidget *widget,
const char *css_class)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GQuark class_quark;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (css_class != NULL, FALSE);
g_return_val_if_fail (css_class[0] != '\0', FALSE);
g_return_val_if_fail (css_class[0] != '.', FALSE);
class_quark = g_quark_try_string (css_class);
if (!class_quark)
return FALSE;
return gtk_css_node_has_class (priv->cssnode, class_quark);
}
/**
* gtk_widget_get_css_classes: (attributes org.gtk.Method.get_property=css-classes)
* @widget: a `GtkWidget`
*
* Returns the list of style classes applied to @widget.
*
* Returns: (transfer full): a %NULL-terminated list of
* css classes currently applied to @widget. The returned
* list must freed using g_strfreev().
*/
char **
gtk_widget_get_css_classes (GtkWidget *widget)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
const GQuark *classes;
guint n_classes;
char **strv;
guint i;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
classes = gtk_css_node_list_classes (priv->cssnode, &n_classes);
strv = g_new (char *, n_classes + 1);
for (i = 0; i < n_classes; i++)
strv[i] = g_strdup (g_quark_to_string (classes[i]));
strv[n_classes] = NULL;
return strv;
}
/**
* gtk_widget_set_css_classes: (attributes org.gtk.Method.set_property=css-classes)
* @widget: a `GtkWidget`
* @classes: (transfer none) (array zero-terminated=1):
* %NULL-terminated list of style classes to apply to @widget.
*
* Clear all style classes applied to @widget
* and replace them with @classes.
*/
void
gtk_widget_set_css_classes (GtkWidget *widget,
const char **classes)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_css_node_set_classes (priv->cssnode, classes);
g_object_notify_by_pspec (G_OBJECT (widget), widget_props[PROP_CSS_CLASSES]);
}
/**
* gtk_widget_get_color:
* @widget: a `GtkWidget`
* @color: (out): return location for the color
*
* Gets the current foreground color for the widget’s
* CSS style.
*
* This function should only be used in snapshot
* implementations that need to do custom
* drawing with the foreground color.
*
* Since: 4.10
*/
void
gtk_widget_get_color (GtkWidget *widget,
GdkRGBA *color)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
GtkCssStyle *style;
g_return_if_fail (GTK_IS_WIDGET (widget));
style = gtk_css_node_get_style (priv->cssnode);
*color = *gtk_css_color_value_get_rgba (style->core->color);
}
/*< private >
* gtk_widget_update_orientation:
* @widget: a `GtkWidget` implementing `GtkOrientable`
* @orientation: the orientation
*
* Update the internal state associated to the given
* @orientation of a `GtkWidget`.
*/
void
gtk_widget_update_orientation (GtkWidget *widget,
GtkOrientation orientation)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_widget_add_css_class (widget, "horizontal");
gtk_widget_remove_css_class (widget, "vertical");
}
else
{
gtk_widget_add_css_class (widget, "vertical");
gtk_widget_remove_css_class (widget, "horizontal");
}
gtk_accessible_update_property (GTK_ACCESSIBLE (widget),
GTK_ACCESSIBLE_PROPERTY_ORIENTATION, orientation,
-1);
}
/**
* gtk_widget_class_set_accessible_role:
* @widget_class: a `GtkWidgetClass`
* @accessible_role: the `GtkAccessibleRole` used by the @widget_class
*
* Sets the accessible role used by the given `GtkWidget` class.
*
* Different accessible roles have different states, and are
* rendered differently by assistive technologies.
*/
void
gtk_widget_class_set_accessible_role (GtkWidgetClass *widget_class,
GtkAccessibleRole accessible_role)
{
GtkWidgetClassPrivate *priv;
g_return_if_fail (GTK_IS_WIDGET_CLASS (widget_class));
g_return_if_fail (!gtk_accessible_role_is_abstract (accessible_role));
priv = widget_class->priv;
priv->accessible_role = accessible_role;
}
/**
* gtk_widget_class_get_accessible_role:
* @widget_class: a `GtkWidgetClass`
*
* Retrieves the accessible role used by the given `GtkWidget` class.
*
* Different accessible roles have different states, and are rendered
* differently by assistive technologies.
*
* See also: [method@Gtk.Accessible.get_accessible_role].
*
* Returns: the accessible role for the widget class
*/
GtkAccessibleRole
gtk_widget_class_get_accessible_role (GtkWidgetClass *widget_class)
{
g_return_val_if_fail (GTK_IS_WIDGET_CLASS (widget_class), GTK_ACCESSIBLE_ROLE_GENERIC);
return widget_class->priv->accessible_role;
}
void
gtk_widget_set_active_state (GtkWidget *widget,
gboolean active)
{
GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
if (active)
{
priv->n_active++;
gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_ACTIVE, FALSE);
}
else
{
if (priv->n_active == 0)
{
g_warning ("Broken accounting of active state for widget %p(%s)",
widget, G_OBJECT_TYPE_NAME (widget));
}
else
priv->n_active--;
if (priv->n_active == 0)
gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_ACTIVE);
}
}