711 lines
22 KiB
C
711 lines
22 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <string.h>
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#include "gtkframe.h"
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#include "gtklabel.h"
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#include "gtkprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkbuildable.h"
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#include "gtkwidgetprivate.h"
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#include "gtklabel.h"
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/**
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* GtkFrame:
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*
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* `GtkFrame` is a widget that surrounds its child with a decorative
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* frame and an optional label.
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*
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* 
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*
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* If present, the label is drawn inside the top edge of the frame.
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* The horizontal position of the label can be controlled with
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* [method@Gtk.Frame.set_label_align].
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*
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* `GtkFrame` clips its child. You can use this to add rounded corners
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* to widgets, but be aware that it also cuts off shadows.
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*
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* # GtkFrame as GtkBuildable
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*
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* The `GtkFrame` implementation of the `GtkBuildable` interface supports
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* placing a child in the label position by specifying “label” as the
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* “type” attribute of a `<child>` element. A normal content child can
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* be specified without specifying a `<child>` type attribute.
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*
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* An example of a UI definition fragment with GtkFrame:
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* ```xml
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* <object class="GtkFrame">
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* <child type="label">
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* <object class="GtkLabel" id="frame_label"/>
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* </child>
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* <child>
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* <object class="GtkEntry" id="frame_content"/>
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* </child>
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* </object>
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* ```
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*
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* # CSS nodes
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*
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* ```
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* frame
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* ├── <label widget>
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* ╰── <child>
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* ```
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*
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* `GtkFrame` has a main CSS node with name “frame”, which is used to draw the
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* visible border. You can set the appearance of the border using CSS properties
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* like “border-style” on this node.
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*
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* # Accessibility
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*
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* `GtkFrame` uses the `GTK_ACCESSIBLE_ROLE_GROUP` role.
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*/
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typedef struct
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{
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/* Properties */
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GtkWidget *label_widget;
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GtkWidget *child;
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guint has_frame : 1;
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float label_xalign;
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} GtkFramePrivate;
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enum {
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PROP_0,
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PROP_LABEL,
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PROP_LABEL_XALIGN,
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PROP_LABEL_WIDGET,
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PROP_CHILD,
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LAST_PROP
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};
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static GParamSpec *frame_props[LAST_PROP];
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static void gtk_frame_dispose (GObject *object);
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static void gtk_frame_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_frame_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_frame_size_allocate (GtkWidget *widget,
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int width,
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int height,
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int baseline);
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static void gtk_frame_real_compute_child_allocation (GtkFrame *frame,
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GtkAllocation *child_allocation);
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/* GtkBuildable */
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static void gtk_frame_buildable_init (GtkBuildableIface *iface);
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static void gtk_frame_buildable_add_child (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *type);
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static void gtk_frame_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum_size,
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int *natural_size,
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int *minimum_baseline,
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int *natural_baseline);
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static void gtk_frame_compute_expand (GtkWidget *widget,
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gboolean *hexpand,
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gboolean *vexpand);
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static GtkSizeRequestMode gtk_frame_get_request_mode (GtkWidget *widget);
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G_DEFINE_TYPE_WITH_CODE (GtkFrame, gtk_frame, GTK_TYPE_WIDGET,
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G_ADD_PRIVATE (GtkFrame)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
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gtk_frame_buildable_init))
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static void
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gtk_frame_class_init (GtkFrameClass *class)
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{
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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gobject_class = (GObjectClass*) class;
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widget_class = GTK_WIDGET_CLASS (class);
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gobject_class->dispose = gtk_frame_dispose;
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gobject_class->set_property = gtk_frame_set_property;
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gobject_class->get_property = gtk_frame_get_property;
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widget_class->size_allocate = gtk_frame_size_allocate;
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widget_class->measure = gtk_frame_measure;
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widget_class->compute_expand = gtk_frame_compute_expand;
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widget_class->get_request_mode = gtk_frame_get_request_mode;
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class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
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/**
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* GtkFrame:label: (attributes org.gtk.Property.get=gtk_frame_get_label org.gtk.Property.set=gtk_frame_set_label)
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*
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* Text of the frame's label.
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*/
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frame_props[PROP_LABEL] =
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g_param_spec_string ("label", NULL, NULL,
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NULL,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkFrame:label-xalign: (attributes org.gtk.Property.get=gtk_frame_get_label_align org.gtk.Property.set=gtk_frame_set_label_align)
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*
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* The horizontal alignment of the label.
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*/
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frame_props[PROP_LABEL_XALIGN] =
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g_param_spec_float ("label-xalign", NULL, NULL,
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0.0, 1.0,
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0.0,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkFrame:label-widget: (attributes org.gtk.Property.get=gtk_frame_get_label_widget org.gtk.Property.set=gtk_frame_set_label_widget)
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*
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* Widget to display in place of the usual frame label.
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*/
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frame_props[PROP_LABEL_WIDGET] =
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g_param_spec_object ("label-widget", NULL, NULL,
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GTK_TYPE_WIDGET,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkFrame:child: (attributes org.gtk.Property.get=gtk_frame_get_child org.gtk.Property.set=gtk_frame_set_child)
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*
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* The child widget.
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*/
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frame_props[PROP_CHILD] =
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g_param_spec_object ("child", NULL, NULL,
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GTK_TYPE_WIDGET,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (gobject_class, LAST_PROP, frame_props);
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gtk_widget_class_set_css_name (widget_class, I_("frame"));
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gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_GROUP);
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}
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static GtkBuildableIface *parent_buildable_iface;
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static void
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gtk_frame_buildable_init (GtkBuildableIface *iface)
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{
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parent_buildable_iface = g_type_interface_peek_parent (iface);
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iface->add_child = gtk_frame_buildable_add_child;
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}
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static void
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gtk_frame_buildable_add_child (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *type)
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{
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if (type && strcmp (type, "label") == 0)
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gtk_frame_set_label_widget (GTK_FRAME (buildable), GTK_WIDGET (child));
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else if (GTK_IS_WIDGET (child))
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gtk_frame_set_child (GTK_FRAME (buildable), GTK_WIDGET (child));
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else
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parent_buildable_iface->add_child (buildable, builder, child, type);
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}
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static void
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gtk_frame_init (GtkFrame *frame)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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gtk_widget_set_overflow (GTK_WIDGET (frame), GTK_OVERFLOW_HIDDEN);
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priv->label_widget = NULL;
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priv->has_frame = TRUE;
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priv->label_xalign = 0.0;
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}
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static void
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gtk_frame_dispose (GObject *object)
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{
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GtkFrame *frame = GTK_FRAME (object);
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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g_clear_pointer (&priv->label_widget, gtk_widget_unparent);
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g_clear_pointer (&priv->child, gtk_widget_unparent);
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G_OBJECT_CLASS (gtk_frame_parent_class)->dispose (object);
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}
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static void
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gtk_frame_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkFrame *frame = GTK_FRAME (object);
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switch (prop_id)
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{
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case PROP_LABEL:
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gtk_frame_set_label (frame, g_value_get_string (value));
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break;
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case PROP_LABEL_XALIGN:
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gtk_frame_set_label_align (frame, g_value_get_float (value));
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break;
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case PROP_LABEL_WIDGET:
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gtk_frame_set_label_widget (frame, g_value_get_object (value));
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break;
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case PROP_CHILD:
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gtk_frame_set_child (frame, g_value_get_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_frame_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkFrame *frame = GTK_FRAME (object);
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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switch (prop_id)
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{
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case PROP_LABEL:
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g_value_set_string (value, gtk_frame_get_label (frame));
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break;
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case PROP_LABEL_XALIGN:
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g_value_set_float (value, priv->label_xalign);
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break;
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case PROP_LABEL_WIDGET:
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g_value_set_object (value,
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priv->label_widget ?
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G_OBJECT (priv->label_widget) : NULL);
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break;
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case PROP_CHILD:
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g_value_set_object (value, gtk_frame_get_child (frame));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/**
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* gtk_frame_new:
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* @label: (nullable): the text to use as the label of the frame
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*
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* Creates a new `GtkFrame`, with optional label @label.
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*
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* If @label is %NULL, the label is omitted.
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*
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* Returns: a new `GtkFrame` widget
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*/
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GtkWidget*
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gtk_frame_new (const char *label)
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{
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return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
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}
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/**
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* gtk_frame_set_label: (attributes org.gtk.Method.set_property=label)
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* @frame: a `GtkFrame`
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* @label: (nullable): the text to use as the label of the frame
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*
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* Creates a new `GtkLabel` with the @label and sets it as the frame's
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* label widget.
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*/
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void
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gtk_frame_set_label (GtkFrame *frame,
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const char *label)
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{
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g_return_if_fail (GTK_IS_FRAME (frame));
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if (!label)
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gtk_frame_set_label_widget (frame, NULL);
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else
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gtk_frame_set_label_widget (frame, gtk_label_new (label));
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}
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/**
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* gtk_frame_get_label: (attributes org.gtk.Method.get_property=label)
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* @frame: a `GtkFrame`
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*
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* Returns the frame labels text.
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*
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* If the frame's label widget is not a `GtkLabel`, %NULL
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* is returned.
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*
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* Returns: (nullable): the text in the label, or %NULL if there
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* was no label widget or the label widget was not a `GtkLabel`.
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* This string is owned by GTK and must not be modified or freed.
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*/
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const char *
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gtk_frame_get_label (GtkFrame *frame)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
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if (GTK_IS_LABEL (priv->label_widget))
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return gtk_label_get_text (GTK_LABEL (priv->label_widget));
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else
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return NULL;
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}
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static void
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update_accessible_relation (GtkFrame *frame)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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if (!priv->child)
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return;
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if (priv->label_widget)
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gtk_accessible_update_relation (GTK_ACCESSIBLE (priv->child),
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GTK_ACCESSIBLE_RELATION_LABELLED_BY, priv->label_widget, NULL,
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-1);
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else
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gtk_accessible_reset_relation (GTK_ACCESSIBLE (priv->child),
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GTK_ACCESSIBLE_RELATION_LABELLED_BY);
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}
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/**
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* gtk_frame_set_label_widget: (attributes org.gtk.Method.get_property=label-widget)
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* @frame: a `GtkFrame`
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* @label_widget: (nullable): the new label widget
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*
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* Sets the label widget for the frame.
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*
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* This is the widget that will appear embedded in the top edge
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* of the frame as a title.
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*/
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void
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gtk_frame_set_label_widget (GtkFrame *frame,
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GtkWidget *label_widget)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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g_return_if_fail (GTK_IS_FRAME (frame));
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g_return_if_fail (label_widget == NULL || priv->label_widget == label_widget || gtk_widget_get_parent (label_widget) == NULL);
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if (priv->label_widget == label_widget)
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return;
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if (priv->label_widget)
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gtk_widget_unparent (priv->label_widget);
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priv->label_widget = label_widget;
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if (label_widget)
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{
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priv->label_widget = label_widget;
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gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
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}
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update_accessible_relation (frame);
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g_object_freeze_notify (G_OBJECT (frame));
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g_object_notify_by_pspec (G_OBJECT (frame), frame_props[PROP_LABEL_WIDGET]);
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g_object_notify_by_pspec (G_OBJECT (frame), frame_props[PROP_LABEL]);
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g_object_thaw_notify (G_OBJECT (frame));
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}
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/**
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* gtk_frame_get_label_widget: (attributes org.gtk.Method.get_property=label-widget)
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* @frame: a `GtkFrame`
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*
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* Retrieves the label widget for the frame.
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*
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* Returns: (nullable) (transfer none): the label widget
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*/
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GtkWidget *
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gtk_frame_get_label_widget (GtkFrame *frame)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
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return priv->label_widget;
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}
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/**
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* gtk_frame_set_label_align: (attributes org.gtk.Method.set_property=label-xalign)
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* @frame: a `GtkFrame`
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* @xalign: The position of the label along the top edge
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* of the widget. A value of 0.0 represents left alignment;
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* 1.0 represents right alignment.
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*
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* Sets the X alignment of the frame widget’s label.
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*
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* The default value for a newly created frame is 0.0.
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*/
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void
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gtk_frame_set_label_align (GtkFrame *frame,
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float xalign)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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g_return_if_fail (GTK_IS_FRAME (frame));
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xalign = CLAMP (xalign, 0.0, 1.0);
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if (priv->label_xalign == xalign)
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return;
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priv->label_xalign = xalign;
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g_object_notify_by_pspec (G_OBJECT (frame), frame_props[PROP_LABEL_XALIGN]);
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gtk_widget_queue_allocate (GTK_WIDGET (frame));
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}
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/**
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* gtk_frame_get_label_align: (attributes org.gtk.Method.get_property=label-xalign)
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* @frame: a `GtkFrame`
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*
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* Retrieves the X alignment of the frame’s label.
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*
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* Returns: the frames X alignment
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*/
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float
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gtk_frame_get_label_align (GtkFrame *frame)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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g_return_val_if_fail (GTK_IS_FRAME (frame), 0.0);
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return priv->label_xalign;
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}
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static void
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||
gtk_frame_size_allocate (GtkWidget *widget,
|
||
int width,
|
||
int height,
|
||
int baseline)
|
||
{
|
||
GtkFrame *frame = GTK_FRAME (widget);
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
GtkAllocation new_allocation;
|
||
|
||
GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, &new_allocation);
|
||
|
||
if (priv->label_widget &&
|
||
gtk_widget_get_visible (priv->label_widget))
|
||
{
|
||
GtkAllocation label_allocation;
|
||
int nat_width, label_width, label_height;
|
||
float xalign;
|
||
|
||
if (_gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
|
||
xalign = priv->label_xalign;
|
||
else
|
||
xalign = 1 - priv->label_xalign;
|
||
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_HORIZONTAL, -1,
|
||
NULL, &nat_width, NULL, NULL);
|
||
label_width = MIN (new_allocation.width, nat_width);
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_VERTICAL, width,
|
||
&label_height, NULL, NULL, NULL);
|
||
|
||
label_allocation.x = new_allocation.x + (new_allocation.width - label_width) * xalign;
|
||
label_allocation.y = new_allocation.y - label_height;
|
||
label_allocation.height = label_height;
|
||
label_allocation.width = label_width;
|
||
|
||
gtk_widget_size_allocate (priv->label_widget, &label_allocation, -1);
|
||
}
|
||
|
||
if (priv->child && gtk_widget_get_visible (priv->child))
|
||
gtk_widget_size_allocate (priv->child, &new_allocation, -1);
|
||
}
|
||
|
||
static void
|
||
gtk_frame_real_compute_child_allocation (GtkFrame *frame,
|
||
GtkAllocation *child_allocation)
|
||
{
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
int frame_width, frame_height;
|
||
int height;
|
||
|
||
frame_width = gtk_widget_get_width (GTK_WIDGET (frame));
|
||
frame_height = gtk_widget_get_height (GTK_WIDGET (frame));
|
||
|
||
if (priv->label_widget)
|
||
{
|
||
int nat_width, width;
|
||
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_HORIZONTAL, -1,
|
||
NULL, &nat_width, NULL, NULL);
|
||
width = MIN (frame_width, nat_width);
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_VERTICAL, width,
|
||
&height, NULL, NULL, NULL);
|
||
}
|
||
else
|
||
height = 0;
|
||
|
||
child_allocation->x = 0;
|
||
child_allocation->y = height;
|
||
child_allocation->width = MAX (1, frame_width);
|
||
child_allocation->height = MAX (1, frame_height - height);
|
||
}
|
||
|
||
static void
|
||
gtk_frame_measure (GtkWidget *widget,
|
||
GtkOrientation orientation,
|
||
int for_size,
|
||
int *minimum,
|
||
int *natural,
|
||
int *minimum_baseline,
|
||
int *natural_baseline)
|
||
{
|
||
GtkFrame *frame = GTK_FRAME (widget);
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
int child_min, child_nat;
|
||
|
||
if (priv->child && gtk_widget_get_visible (priv->child))
|
||
{
|
||
gtk_widget_measure (priv->child,
|
||
orientation, for_size,
|
||
&child_min, &child_nat,
|
||
NULL, NULL);
|
||
|
||
*minimum = child_min;
|
||
*natural = child_nat;
|
||
}
|
||
else
|
||
{
|
||
*minimum = 0;
|
||
*natural = 0;
|
||
}
|
||
|
||
if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
|
||
{
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
gtk_widget_measure (priv->label_widget,
|
||
orientation, -1,
|
||
&child_min, &child_nat,
|
||
NULL, NULL);
|
||
|
||
*minimum = MAX (child_min, *minimum);
|
||
*natural = MAX (child_nat, *natural);
|
||
}
|
||
else
|
||
{
|
||
gtk_widget_measure (priv->label_widget,
|
||
orientation, for_size,
|
||
&child_min, &child_nat,
|
||
NULL, NULL);
|
||
|
||
*minimum += child_min;
|
||
*natural += child_nat;
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_frame_compute_expand (GtkWidget *widget,
|
||
gboolean *hexpand,
|
||
gboolean *vexpand)
|
||
{
|
||
GtkFrame *frame = GTK_FRAME (widget);
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
|
||
if (priv->child)
|
||
{
|
||
*hexpand = gtk_widget_compute_expand (priv->child, GTK_ORIENTATION_HORIZONTAL);
|
||
*vexpand = gtk_widget_compute_expand (priv->child, GTK_ORIENTATION_VERTICAL);
|
||
}
|
||
else
|
||
{
|
||
*hexpand = FALSE;
|
||
*vexpand = FALSE;
|
||
}
|
||
}
|
||
|
||
static GtkSizeRequestMode
|
||
gtk_frame_get_request_mode (GtkWidget *widget)
|
||
{
|
||
GtkFrame *frame = GTK_FRAME (widget);
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
|
||
if (priv->child)
|
||
return gtk_widget_get_request_mode (priv->child);
|
||
else
|
||
return GTK_SIZE_REQUEST_CONSTANT_SIZE;
|
||
}
|
||
|
||
/**
|
||
* gtk_frame_set_child: (attributes org.gtk.Method.set_property=child)
|
||
* @frame: a `GtkFrame`
|
||
* @child: (nullable): the child widget
|
||
*
|
||
* Sets the child widget of @frame.
|
||
*/
|
||
void
|
||
gtk_frame_set_child (GtkFrame *frame,
|
||
GtkWidget *child)
|
||
{
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
|
||
g_return_if_fail (GTK_IS_FRAME (frame));
|
||
g_return_if_fail (child == NULL || priv->child == child || gtk_widget_get_parent (child) == NULL);
|
||
|
||
if (priv->child == child)
|
||
return;
|
||
|
||
g_clear_pointer (&priv->child, gtk_widget_unparent);
|
||
|
||
if (child)
|
||
{
|
||
priv->child = child;
|
||
gtk_widget_set_parent (child, GTK_WIDGET (frame));
|
||
}
|
||
|
||
update_accessible_relation (frame);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (frame), frame_props[PROP_CHILD]);
|
||
}
|
||
|
||
/**
|
||
* gtk_frame_get_child: (attributes org.gtk.Method.get_property=child)
|
||
* @frame: a `GtkFrame`
|
||
*
|
||
* Gets the child widget of @frame.
|
||
*
|
||
* Returns: (nullable) (transfer none): the child widget of @frame
|
||
*/
|
||
GtkWidget *
|
||
gtk_frame_get_child (GtkFrame *frame)
|
||
{
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
|
||
g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
|
||
|
||
return priv->child;
|
||
}
|