jean
/
Learning_GTK4_tree
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Learning_GTK4_tree/gtk/gtkrange.c

2969 lines
92 KiB
C
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 2001 Red Hat, Inc.
*
* 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 1997-2004. 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 "gtkrangeprivate.h"
#include "gtkaccessible.h"
#include "gtkaccessiblerange.h"
#include "gtkadjustmentprivate.h"
#include "gtkcolorscaleprivate.h"
#include "gtkcssboxesprivate.h"
#include "gtkenums.h"
#include "gtkeventcontrollerkey.h"
#include "gtkeventcontrollerscroll.h"
#include "gtkgesturedrag.h"
#include "gtkgesturelongpressprivate.h"
#include "gtkgestureclick.h"
#include "gtkgizmoprivate.h"
#include "gtkmarshalers.h"
#include "gtkorientable.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtksnapshot.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include <stdio.h>
#include <math.h>
/**
* GtkRange:
*
* `GtkRange` is the common base class for widgets which visualize an
* adjustment.
*
* Widgets that are derived from `GtkRange` include
* [class@Gtk.Scale] and [class@Gtk.Scrollbar].
*
* Apart from signals for monitoring the parameters of the adjustment,
* `GtkRange` provides properties and methods for setting a
* “fill level” on range widgets. See [method@Gtk.Range.set_fill_level].
*/
#define TIMEOUT_INITIAL 500
#define TIMEOUT_REPEAT 250
#define AUTOSCROLL_FACTOR 20
#define SCROLL_EDGE_SIZE 15
#define MARK_SNAP_LENGTH 12
typedef struct _GtkRangeStepTimer GtkRangeStepTimer;
typedef struct _GtkRangePrivate GtkRangePrivate;
struct _GtkRangePrivate
{
GtkWidget *grab_location; /* "grabbed" mouse location, NULL for no grab */
GtkRangeStepTimer *timer;
GtkAdjustment *adjustment;
int slider_x;
int slider_y;
GtkWidget *trough_widget;
GtkWidget *fill_widget;
GtkWidget *highlight_widget;
GtkWidget *slider_widget;
GtkGesture *drag_gesture;
double fill_level;
double *marks;
int *mark_pos;
int n_marks;
int round_digits; /* Round off value to this many digits, -1 for no rounding */
int slide_initial_slider_position;
int slide_initial_coordinate_delta;
guint flippable : 1;
guint inverted : 1;
guint slider_size_fixed : 1;
guint trough_click_forward : 1; /* trough click was on the forward side of slider */
/* Whether we're doing fine adjustment */
guint zoom : 1;
/* Fill level */
guint show_fill_level : 1;
guint restrict_to_fill_level : 1;
/* Whether dragging is ongoing */
guint in_drag : 1;
GtkOrientation orientation;
GtkScrollType autoscroll_mode;
guint autoscroll_id;
};
enum {
PROP_0,
PROP_ADJUSTMENT,
PROP_INVERTED,
PROP_SHOW_FILL_LEVEL,
PROP_RESTRICT_TO_FILL_LEVEL,
PROP_FILL_LEVEL,
PROP_ROUND_DIGITS,
PROP_ORIENTATION,
LAST_PROP = PROP_ORIENTATION
};
enum {
VALUE_CHANGED,
ADJUST_BOUNDS,
MOVE_SLIDER,
CHANGE_VALUE,
LAST_SIGNAL
};
static void gtk_range_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_range_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_range_finalize (GObject *object);
static void gtk_range_dispose (GObject *object);
static void gtk_range_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_range_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline);
static void gtk_range_unmap (GtkWidget *widget);
static void gtk_range_click_gesture_pressed (GtkGestureClick *gesture,
guint n_press,
double x,
double y,
GtkRange *range);
static void gtk_range_drag_gesture_begin (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkRange *range);
static void gtk_range_drag_gesture_update (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkRange *range);
static void gtk_range_drag_gesture_end (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkRange *range);
static void gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture,
double x,
double y,
GtkRange *range);
static void update_slider_position (GtkRange *range,
int mouse_x,
int mouse_y);
static void stop_scrolling (GtkRange *range);
static void add_autoscroll (GtkRange *range);
static void remove_autoscroll (GtkRange *range);
/* Range methods */
static void gtk_range_move_slider (GtkRange *range,
GtkScrollType scroll);
/* Internals */
static void gtk_range_compute_slider_position (GtkRange *range,
double adjustment_value,
GdkRectangle *slider_rect);
static gboolean gtk_range_scroll (GtkRange *range,
GtkScrollType scroll);
static void gtk_range_calc_marks (GtkRange *range);
static void gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
gpointer data);
static void gtk_range_adjustment_changed (GtkAdjustment *adjustment,
gpointer data);
static void gtk_range_add_step_timer (GtkRange *range,
GtkScrollType step);
static void gtk_range_remove_step_timer (GtkRange *range);
static gboolean gtk_range_real_change_value (GtkRange *range,
GtkScrollType scroll,
double value);
static gboolean gtk_range_key_controller_key_pressed (GtkEventControllerKey *controller,
guint keyval,
guint keycode,
GdkModifierType state,
GtkWidget *widget);
static void gtk_range_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction);
static void gtk_range_measure_trough (GtkGizmo *gizmo,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_range_allocate_trough (GtkGizmo *gizmo,
int width,
int height,
int baseline);
static void gtk_range_render_trough (GtkGizmo *gizmo,
GtkSnapshot *snapshot);
static gboolean gtk_range_scroll_controller_scroll (GtkEventControllerScroll *scroll,
double dx,
double dy,
GtkRange *range);
static void gtk_range_set_orientation (GtkRange *range,
GtkOrientation orientation);
static void gtk_range_accessible_range_init (GtkAccessibleRangeInterface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkRange, gtk_range, GTK_TYPE_WIDGET,
G_ADD_PRIVATE (GtkRange)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACCESSIBLE_RANGE,
gtk_range_accessible_range_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
NULL))
static guint signals[LAST_SIGNAL];
static GParamSpec *properties[LAST_PROP];
static void
gtk_range_class_init (GtkRangeClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = G_OBJECT_CLASS (class);
widget_class = (GtkWidgetClass*) class;
gobject_class->set_property = gtk_range_set_property;
gobject_class->get_property = gtk_range_get_property;
gobject_class->finalize = gtk_range_finalize;
gobject_class->dispose = gtk_range_dispose;
widget_class->measure = gtk_range_measure;
widget_class->size_allocate = gtk_range_size_allocate;
widget_class->unmap = gtk_range_unmap;
widget_class->direction_changed = gtk_range_direction_changed;
class->move_slider = gtk_range_move_slider;
class->change_value = gtk_range_real_change_value;
/**
* GtkRange::value-changed:
* @range: the `GtkRange` that received the signal
*
* Emitted when the range value changes.
*/
signals[VALUE_CHANGED] =
g_signal_new (I_("value-changed"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkRangeClass, value_changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkRange::adjust-bounds:
* @range: the `GtkRange` that received the signal
* @value: the value before we clamp
*
* Emitted before clamping a value, to give the application a
* chance to adjust the bounds.
*/
signals[ADJUST_BOUNDS] =
g_signal_new (I_("adjust-bounds"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkRangeClass, adjust_bounds),
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
G_TYPE_DOUBLE);
/**
* GtkRange::move-slider:
* @range: the `GtkRange` that received the signal
* @step: how to move the slider
*
* Virtual function that moves the slider.
*
* Used for keybindings.
*/
signals[MOVE_SLIDER] =
g_signal_new (I_("move-slider"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkRangeClass, move_slider),
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
GTK_TYPE_SCROLL_TYPE);
/**
* GtkRange::change-value:
* @range: the `GtkRange` that received the signal
* @scroll: the type of scroll action that was performed
* @value: the new value resulting from the scroll action
*
* Emitted when a scroll action is performed on a range.
*
* It allows an application to determine the type of scroll event
* that occurred and the resultant new value. The application can
* handle the event itself and return %TRUE to prevent further
* processing. Or, by returning %FALSE, it can pass the event to
* other handlers until the default GTK handler is reached.
*
* The value parameter is unrounded. An application that overrides
* the ::change-value signal is responsible for clamping the value
* to the desired number of decimal digits; the default GTK
* handler clamps the value based on [property@Gtk.Range:round-digits].
*
* Returns: %TRUE to prevent other handlers from being invoked for
* the signal, %FALSE to propagate the signal further
*/
signals[CHANGE_VALUE] =
g_signal_new (I_("change-value"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkRangeClass, change_value),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__ENUM_DOUBLE,
G_TYPE_BOOLEAN, 2,
GTK_TYPE_SCROLL_TYPE,
G_TYPE_DOUBLE);
g_signal_set_va_marshaller (signals[CHANGE_VALUE],
G_TYPE_FROM_CLASS (gobject_class),
_gtk_marshal_BOOLEAN__ENUM_DOUBLEv);
g_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation");
/**
* GtkRange:adjustment: (attributes org.gtk.Property.get=gtk_range_get_adjustment org.gtk.Property.set=gtk_range_set_adjustment)
*
* The adjustment that is controlled by the range.
*/
properties[PROP_ADJUSTMENT] =
g_param_spec_object ("adjustment", NULL, NULL,
GTK_TYPE_ADJUSTMENT,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:inverted: (attributes org.gtk.Property.get=gtk_range_get_inverted org.gtk.Property.set=gtk_range_set_inverted)
*
* If %TRUE, the direction in which the slider moves is inverted.
*/
properties[PROP_INVERTED] =
g_param_spec_boolean ("inverted", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:show-fill-level: (attributes org.gtk.Property.get=gtk_range_get_show_fill_level org.gtk.Property.set=gtk_range_set_show_fill_level)
*
* Controls whether fill level indicator graphics are displayed
* on the trough.
*/
properties[PROP_SHOW_FILL_LEVEL] =
g_param_spec_boolean ("show-fill-level", NULL, NULL,
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:restrict-to-fill-level: (attributes org.gtk.Property.get=gtk_range_get_restrict_to_fill_level org.gtk.Property.set=gtk_range_set_restrict_to_fill_level)
*
* Controls whether slider movement is restricted to an
* upper boundary set by the fill level.
*/
properties[PROP_RESTRICT_TO_FILL_LEVEL] =
g_param_spec_boolean ("restrict-to-fill-level", NULL, NULL,
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:fill-level: (attributes org.gtk.Property.get=gtk_range_get_fill_level org.gtk.Property.set=gtk_range_set_fill_level)
*
* The fill level (e.g. prebuffering of a network stream).
*/
properties[PROP_FILL_LEVEL] =
g_param_spec_double ("fill-level", NULL, NULL,
-G_MAXDOUBLE, G_MAXDOUBLE,
G_MAXDOUBLE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:round-digits: (attributes org.gtk.Property.get=gtk_range_get_round_digits org.gtk.Property.set=gtk_range_set_round_digits)
*
* The number of digits to round the value to when
* it changes.
*
* See [signal@Gtk.Range::change-value].
*/
properties[PROP_ROUND_DIGITS] =
g_param_spec_int ("round-digits", NULL, NULL,
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, LAST_PROP, properties);
gtk_widget_class_set_css_name (widget_class, I_("range"));
gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_GENERIC);
}
static gboolean
accessible_range_set_current_value (GtkAccessibleRange *accessible_range,
double value)
{
gtk_range_set_value (GTK_RANGE (accessible_range), value);
return TRUE;
}
static void
gtk_range_accessible_range_init (GtkAccessibleRangeInterface *iface)
{
iface->set_current_value = accessible_range_set_current_value;
}
static void
gtk_range_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkRange *range = GTK_RANGE (object);
switch (prop_id)
{
case PROP_ORIENTATION:
gtk_range_set_orientation (range, g_value_get_enum (value));
break;
case PROP_ADJUSTMENT:
gtk_range_set_adjustment (range, g_value_get_object (value));
break;
case PROP_INVERTED:
gtk_range_set_inverted (range, g_value_get_boolean (value));
break;
case PROP_SHOW_FILL_LEVEL:
gtk_range_set_show_fill_level (range, g_value_get_boolean (value));
break;
case PROP_RESTRICT_TO_FILL_LEVEL:
gtk_range_set_restrict_to_fill_level (range, g_value_get_boolean (value));
break;
case PROP_FILL_LEVEL:
gtk_range_set_fill_level (range, g_value_get_double (value));
break;
case PROP_ROUND_DIGITS:
gtk_range_set_round_digits (range, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_range_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkRange *range = GTK_RANGE (object);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_ADJUSTMENT:
g_value_set_object (value, priv->adjustment);
break;
case PROP_INVERTED:
g_value_set_boolean (value, priv->inverted);
break;
case PROP_SHOW_FILL_LEVEL:
g_value_set_boolean (value, gtk_range_get_show_fill_level (range));
break;
case PROP_RESTRICT_TO_FILL_LEVEL:
g_value_set_boolean (value, gtk_range_get_restrict_to_fill_level (range));
break;
case PROP_FILL_LEVEL:
g_value_set_double (value, gtk_range_get_fill_level (range));
break;
case PROP_ROUND_DIGITS:
g_value_set_int (value, gtk_range_get_round_digits (range));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_range_init (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkGesture *gesture;
GtkEventController *controller;
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->adjustment = NULL;
priv->inverted = FALSE;
priv->flippable = FALSE;
priv->round_digits = -1;
priv->show_fill_level = FALSE;
priv->restrict_to_fill_level = TRUE;
priv->fill_level = G_MAXDOUBLE;
priv->timer = NULL;
gtk_widget_update_orientation (GTK_WIDGET (range), priv->orientation);
priv->trough_widget = gtk_gizmo_new_with_role ("trough",
GTK_ACCESSIBLE_ROLE_NONE,
gtk_range_measure_trough,
gtk_range_allocate_trough,
gtk_range_render_trough,
NULL,
NULL, NULL);
gtk_widget_set_parent (priv->trough_widget, GTK_WIDGET (range));
priv->slider_widget = gtk_gizmo_new ("slider", NULL, NULL, NULL, NULL, NULL, NULL);
gtk_widget_set_parent (priv->slider_widget, priv->trough_widget);
/* Note: Order is important here.
* The ::drag-begin handler relies on the state set up by the
* click ::pressed handler. Gestures are handling events
* in the opposite order in which they are added to their
* widget.
*/
priv->drag_gesture = gtk_gesture_drag_new ();
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->drag_gesture), 0);
g_signal_connect (priv->drag_gesture, "drag-begin",
G_CALLBACK (gtk_range_drag_gesture_begin), range);
g_signal_connect (priv->drag_gesture, "drag-update",
G_CALLBACK (gtk_range_drag_gesture_update), range);
g_signal_connect (priv->drag_gesture, "drag-end",
G_CALLBACK (gtk_range_drag_gesture_end), range);
gtk_widget_add_controller (GTK_WIDGET (range), GTK_EVENT_CONTROLLER (priv->drag_gesture));
gesture = gtk_gesture_click_new ();
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), 0);
g_signal_connect (gesture, "pressed",
G_CALLBACK (gtk_range_click_gesture_pressed), range);
gtk_widget_add_controller (GTK_WIDGET (range), GTK_EVENT_CONTROLLER (gesture));
gtk_gesture_group (gesture, priv->drag_gesture);
gesture = gtk_gesture_long_press_new ();
gtk_gesture_long_press_set_delay_factor (GTK_GESTURE_LONG_PRESS (gesture), 2.0);
g_signal_connect (gesture, "pressed",
G_CALLBACK (gtk_range_long_press_gesture_pressed), range);
gtk_widget_add_controller (GTK_WIDGET (range), GTK_EVENT_CONTROLLER (gesture));
gtk_gesture_group (gesture, priv->drag_gesture);
controller = gtk_event_controller_scroll_new (GTK_EVENT_CONTROLLER_SCROLL_BOTH_AXES);
g_signal_connect (controller, "scroll",
G_CALLBACK (gtk_range_scroll_controller_scroll), range);
gtk_widget_add_controller (GTK_WIDGET (range), controller);
controller = gtk_event_controller_key_new ();
g_signal_connect (controller, "key-pressed",
G_CALLBACK (gtk_range_key_controller_key_pressed), range);
gtk_widget_add_controller (GTK_WIDGET (range), controller);
}
static void
gtk_range_set_orientation (GtkRange *range,
GtkOrientation orientation)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (priv->orientation != orientation)
{
priv->orientation = orientation;
gtk_accessible_update_property (GTK_ACCESSIBLE (range),
GTK_ACCESSIBLE_PROPERTY_ORIENTATION, priv->orientation,
-1);
gtk_widget_update_orientation (GTK_WIDGET (range), priv->orientation);
gtk_widget_queue_resize (GTK_WIDGET (range));
g_object_notify (G_OBJECT (range), "orientation");
}
}
/**
* gtk_range_get_adjustment: (attributes org.gtk.Method.get_property=adjustment)
* @range: a `GtkRange`
*
* Get the adjustment which is the “model” object for `GtkRange`.
*
* Returns: (transfer none): a `GtkAdjustment`
**/
GtkAdjustment*
gtk_range_get_adjustment (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), NULL);
if (!priv->adjustment)
gtk_range_set_adjustment (range, NULL);
return priv->adjustment;
}
/**
* gtk_range_set_adjustment: (attributes org.gtk.Method.set_property=adjustment)
* @range: a `GtkRange`
* @adjustment: a `GtkAdjustment`
*
* Sets the adjustment to be used as the “model” object for the `GtkRange`
*
* The adjustment indicates the current range value, the minimum and
* maximum range values, the step/page increments used for keybindings
* and scrolling, and the page size.
*
* The page size is normally 0 for `GtkScale` and nonzero for `GtkScrollbar`,
* and indicates the size of the visible area of the widget being scrolled.
* The page size affects the size of the scrollbar slider.
*/
void
gtk_range_set_adjustment (GtkRange *range,
GtkAdjustment *adjustment)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
if (!adjustment)
adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
else
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
if (priv->adjustment != adjustment)
{
if (priv->adjustment)
{
g_signal_handlers_disconnect_by_func (priv->adjustment,
gtk_range_adjustment_changed,
range);
g_signal_handlers_disconnect_by_func (priv->adjustment,
gtk_range_adjustment_value_changed,
range);
g_object_unref (priv->adjustment);
}
priv->adjustment = adjustment;
g_object_ref_sink (adjustment);
g_signal_connect (adjustment, "changed",
G_CALLBACK (gtk_range_adjustment_changed),
range);
g_signal_connect (adjustment, "value-changed",
G_CALLBACK (gtk_range_adjustment_value_changed),
range);
gtk_accessible_update_property (GTK_ACCESSIBLE (range),
GTK_ACCESSIBLE_PROPERTY_VALUE_MAX, gtk_adjustment_get_upper (adjustment),
GTK_ACCESSIBLE_PROPERTY_VALUE_MIN, gtk_adjustment_get_lower (adjustment),
GTK_ACCESSIBLE_PROPERTY_VALUE_NOW, gtk_adjustment_get_value (adjustment),
-1);
gtk_range_adjustment_changed (adjustment, range);
gtk_range_adjustment_value_changed (adjustment, range);
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_ADJUSTMENT]);
}
}
static gboolean
should_invert (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
return
(priv->inverted && !priv->flippable) ||
(priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) ||
(!priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
else
return priv->inverted;
}
static gboolean
should_invert_move (GtkRange *range,
GtkOrientation move_orientation)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
/* If the move is parallel to the range, use general check for inversion */
if (move_orientation == priv->orientation)
return should_invert (range);
/* H scale/V move: Always invert, so down/up always dec/increase the value */
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL && GTK_IS_SCALE (range))
return TRUE;
/* V range/H move: Left/right always dec/increase the value */
return FALSE;
}
static void
update_highlight_position (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (!priv->highlight_widget)
return;
if (should_invert (range))
{
gtk_widget_add_css_class (priv->highlight_widget, "bottom");
gtk_widget_remove_css_class (priv->highlight_widget, "top");
}
else
{
gtk_widget_add_css_class (priv->highlight_widget, "top");
gtk_widget_remove_css_class (priv->highlight_widget, "bottom");
}
}
static void
update_fill_position (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (!priv->fill_widget)
return;
if (should_invert (range))
{
gtk_widget_add_css_class (priv->fill_widget, "bottom");
gtk_widget_remove_css_class (priv->fill_widget, "top");
}
else
{
gtk_widget_add_css_class (priv->fill_widget, "top");
gtk_widget_remove_css_class (priv->fill_widget, "bottom");
}
}
/**
* gtk_range_set_inverted: (attributes org.gtk.Method.set_property=inverted)
* @range: a `GtkRange`
* @setting: %TRUE to invert the range
*
* Sets whether to invert the range.
*
* Ranges normally move from lower to higher values as the
* slider moves from top to bottom or left to right. Inverted
* ranges have higher values at the top or on the right rather
* than on the bottom or left.
*/
void
gtk_range_set_inverted (GtkRange *range,
gboolean setting)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
setting = setting != FALSE;
if (setting != priv->inverted)
{
priv->inverted = setting;
update_fill_position (range);
update_highlight_position (range);
gtk_widget_queue_resize (priv->trough_widget);
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_INVERTED]);
}
}
/**
* gtk_range_get_inverted: (attributes org.gtk.Method.get_property=inverted)
* @range: a `GtkRange`
*
* Gets whether the range is inverted.
*
* See [method@Gtk.Range.set_inverted].
*
* Returns: %TRUE if the range is inverted
*/
gboolean
gtk_range_get_inverted (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return priv->inverted;
}
/**
* gtk_range_set_flippable:
* @range: a `GtkRange`
* @flippable: %TRUE to make the range flippable
*
* Sets whether the `GtkRange` respects text direction.
*
* If a range is flippable, it will switch its direction
* if it is horizontal and its direction is %GTK_TEXT_DIR_RTL.
*
* See [method@Gtk.Widget.get_direction].
*/
void
gtk_range_set_flippable (GtkRange *range,
gboolean flippable)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
flippable = flippable ? TRUE : FALSE;
if (flippable != priv->flippable)
{
priv->flippable = flippable;
update_fill_position (range);
update_highlight_position (range);
gtk_widget_queue_allocate (GTK_WIDGET (range));
}
}
/**
* gtk_range_get_flippable:
* @range: a `GtkRange`
*
* Gets whether the `GtkRange` respects text direction.
*
* See [method@Gtk.Range.set_flippable].
*
* Returns: %TRUE if the range is flippable
*/
gboolean
gtk_range_get_flippable (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return priv->flippable;
}
/**
* gtk_range_set_slider_size_fixed:
* @range: a `GtkRange`
* @size_fixed: %TRUE to make the slider size constant
*
* Sets whether the range’s slider has a fixed size, or a size that
* depends on its adjustment’s page size.
*
* This function is useful mainly for `GtkRange` subclasses.
*/
void
gtk_range_set_slider_size_fixed (GtkRange *range,
gboolean size_fixed)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
if (size_fixed != priv->slider_size_fixed)
{
priv->slider_size_fixed = size_fixed ? TRUE : FALSE;
if (priv->adjustment && gtk_widget_get_mapped (GTK_WIDGET (range)))
gtk_widget_queue_allocate (priv->trough_widget);
}
}
/**
* gtk_range_get_slider_size_fixed:
* @range: a `GtkRange`
*
* This function is useful mainly for `GtkRange` subclasses.
*
* See [method@Gtk.Range.set_slider_size_fixed].
*
* Returns: whether the range’s slider has a fixed size.
*/
gboolean
gtk_range_get_slider_size_fixed (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return priv->slider_size_fixed;
}
/**
* gtk_range_get_range_rect:
* @range: a `GtkRange`
* @range_rect: (out): return location for the range rectangle
*
* This function returns the area that contains the range’s trough,
* in coordinates relative to @range's origin.
*
* This function is useful mainly for `GtkRange` subclasses.
*/
void
gtk_range_get_range_rect (GtkRange *range,
GdkRectangle *range_rect)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
graphene_rect_t r;
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (range_rect != NULL);
if (!gtk_widget_compute_bounds (priv->trough_widget, GTK_WIDGET (range), &r))
{
*range_rect = (GdkRectangle) { 0, 0, 0, 0 };
}
else
{
*range_rect = (GdkRectangle) {
floorf (r.origin.x),
floorf (r.origin.y),
ceilf (r.size.width),
ceilf (r.size.height),
};
}
}
/**
* gtk_range_get_slider_range:
* @range: a `GtkRange`
* @slider_start: (out) (optional): return location for the slider's start
* @slider_end: (out) (optional): return location for the slider's end
*
* This function returns sliders range along the long dimension,
* in widget->window coordinates.
*
* This function is useful mainly for `GtkRange` subclasses.
*/
void
gtk_range_get_slider_range (GtkRange *range,
int *slider_start,
int *slider_end)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
graphene_rect_t slider_bounds;
g_return_if_fail (GTK_IS_RANGE (range));
if (!gtk_widget_compute_bounds (priv->slider_widget, GTK_WIDGET (range), &slider_bounds))
{
if (slider_start)
*slider_start = 0;
if (slider_end)
*slider_end = 0;
return;
}
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
if (slider_start)
*slider_start = slider_bounds.origin.y;
if (slider_end)
*slider_end = slider_bounds.origin.y + slider_bounds.size.height;
}
else
{
if (slider_start)
*slider_start = slider_bounds.origin.x;
if (slider_end)
*slider_end = slider_bounds.origin.x + slider_bounds.size.width;
}
}
/**
* gtk_range_set_increments:
* @range: a `GtkRange`
* @step: step size
* @page: page size
*
* Sets the step and page sizes for the range.
*
* The step size is used when the user clicks the `GtkScrollbar`
* arrows or moves a `GtkScale` via arrow keys. The page size
* is used for example when moving via Page Up or Page Down keys.
*/
void
gtk_range_set_increments (GtkRange *range,
double step,
double page)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkAdjustment *adjustment;
g_return_if_fail (GTK_IS_RANGE (range));
adjustment = priv->adjustment;
gtk_adjustment_configure (adjustment,
gtk_adjustment_get_value (adjustment),
gtk_adjustment_get_lower (adjustment),
gtk_adjustment_get_upper (adjustment),
step,
page,
gtk_adjustment_get_page_size (adjustment));
}
/**
* gtk_range_set_range:
* @range: a `GtkRange`
* @min: minimum range value
* @max: maximum range value
*
* Sets the allowable values in the `GtkRange`.
*
* The range value is clamped to be between @min and @max.
* (If the range has a non-zero page size, it is clamped
* between @min and @max - page-size.)
*/
void
gtk_range_set_range (GtkRange *range,
double min,
double max)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkAdjustment *adjustment;
double value;
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (min <= max);
adjustment = priv->adjustment;
value = gtk_adjustment_get_value (adjustment);
if (priv->restrict_to_fill_level)
value = MIN (value, MAX (gtk_adjustment_get_lower (adjustment),
priv->fill_level));
gtk_adjustment_configure (adjustment,
value,
min,
max,
gtk_adjustment_get_step_increment (adjustment),
gtk_adjustment_get_page_increment (adjustment),
gtk_adjustment_get_page_size (adjustment));
}
/**
* gtk_range_set_value:
* @range: a `GtkRange`
* @value: new value of the range
*
* Sets the current value of the range.
*
* If the value is outside the minimum or maximum range values,
* it will be clamped to fit inside them. The range emits the
* [signal@Gtk.Range::value-changed] signal if the value changes.
*/
void
gtk_range_set_value (GtkRange *range,
double value)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
if (priv->restrict_to_fill_level)
value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment),
priv->fill_level));
gtk_adjustment_set_value (priv->adjustment, value);
}
/**
* gtk_range_get_value:
* @range: a `GtkRange`
*
* Gets the current value of the range.
*
* Returns: current value of the range.
*/
double
gtk_range_get_value (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
return gtk_adjustment_get_value (priv->adjustment);
}
/**
* gtk_range_set_show_fill_level: (attributes org.gtk.Method.set_property=show-fill-level)
* @range: A `GtkRange`
* @show_fill_level: Whether a fill level indicator graphics is shown.
*
* Sets whether a graphical fill level is show on the trough.
*
* See [method@Gtk.Range.set_fill_level] for a general description
* of the fill level concept.
*/
void
gtk_range_set_show_fill_level (GtkRange *range,
gboolean show_fill_level)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
show_fill_level = show_fill_level ? TRUE : FALSE;
if (show_fill_level == priv->show_fill_level)
return;
priv->show_fill_level = show_fill_level;
if (show_fill_level)
{
priv->fill_widget = gtk_gizmo_new ("fill", NULL, NULL, NULL, NULL, NULL, NULL);
gtk_widget_insert_after (priv->fill_widget, priv->trough_widget, NULL);
update_fill_position (range);
}
else
{
g_clear_pointer (&priv->fill_widget, gtk_widget_unparent);
}
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_SHOW_FILL_LEVEL]);
gtk_widget_queue_allocate (GTK_WIDGET (range));
}
/**
* gtk_range_get_show_fill_level: (attributes org.gtk.Method.get_property=show-fill-level)
* @range: A `GtkRange`
*
* Gets whether the range displays the fill level graphically.
*
* Returns: %TRUE if @range shows the fill level.
*/
gboolean
gtk_range_get_show_fill_level (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return priv->show_fill_level;
}
/**
* gtk_range_set_restrict_to_fill_level: (attributes org.gtk.Method.set_property=restrict-to-fill-level)
* @range: A `GtkRange`
* @restrict_to_fill_level: Whether the fill level restricts slider movement.
*
* Sets whether the slider is restricted to the fill level.
*
* See [method@Gtk.Range.set_fill_level] for a general description
* of the fill level concept.
*/
void
gtk_range_set_restrict_to_fill_level (GtkRange *range,
gboolean restrict_to_fill_level)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
restrict_to_fill_level = restrict_to_fill_level ? TRUE : FALSE;
if (restrict_to_fill_level != priv->restrict_to_fill_level)
{
priv->restrict_to_fill_level = restrict_to_fill_level;
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_RESTRICT_TO_FILL_LEVEL]);
gtk_range_set_value (range, gtk_range_get_value (range));
}
}
/**
* gtk_range_get_restrict_to_fill_level: (attributes org.gtk.Method.get_property=restrict-to-fill-level)
* @range: A `GtkRange`
*
* Gets whether the range is restricted to the fill level.
*
* Returns: %TRUE if @range is restricted to the fill level.
**/
gboolean
gtk_range_get_restrict_to_fill_level (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return priv->restrict_to_fill_level;
}
/**
* gtk_range_set_fill_level: (attributes org.gtk.Method.set_property=fill-level)
* @range: a `GtkRange`
* @fill_level: the new position of the fill level indicator
*
* Set the new position of the fill level indicator.
*
* The “fill level” is probably best described by its most prominent
* use case, which is an indicator for the amount of pre-buffering in
* a streaming media player. In that use case, the value of the range
* would indicate the current play position, and the fill level would
* be the position up to which the file/stream has been downloaded.
*
* This amount of prebuffering can be displayed on the range’s trough
* and is themeable separately from the trough. To enable fill level
* display, use [method@Gtk.Range.set_show_fill_level]. The range defaults
* to not showing the fill level.
*
* Additionally, it’s possible to restrict the range’s slider position
* to values which are smaller than the fill level. This is controlled
* by [method@Gtk.Range.set_restrict_to_fill_level] and is by default
* enabled.
*/
void
gtk_range_set_fill_level (GtkRange *range,
double fill_level)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
if (fill_level != priv->fill_level)
{
priv->fill_level = fill_level;
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_FILL_LEVEL]);
if (priv->show_fill_level)
gtk_widget_queue_allocate (GTK_WIDGET (range));
if (priv->restrict_to_fill_level)
gtk_range_set_value (range, gtk_range_get_value (range));
}
}
/**
* gtk_range_get_fill_level: (attributes org.gtk.Method.get_property=fill-level)
* @range: A `GtkRange`
*
* Gets the current position of the fill level indicator.
*
* Returns: The current fill level
*/
double
gtk_range_get_fill_level (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
return priv->fill_level;
}
static void
gtk_range_dispose (GObject *object)
{
GtkRange *range = GTK_RANGE (object);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gtk_range_remove_step_timer (range);
if (priv->adjustment)
{
g_signal_handlers_disconnect_by_func (priv->adjustment,
gtk_range_adjustment_changed,
range);
g_signal_handlers_disconnect_by_func (priv->adjustment,
gtk_range_adjustment_value_changed,
range);
g_object_unref (priv->adjustment);
priv->adjustment = NULL;
}
if (priv->n_marks)
{
g_free (priv->marks);
priv->marks = NULL;
g_free (priv->mark_pos);
priv->mark_pos = NULL;
priv->n_marks = 0;
}
G_OBJECT_CLASS (gtk_range_parent_class)->dispose (object);
}
static void
gtk_range_finalize (GObject *object)
{
GtkRange *range = GTK_RANGE (object);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_clear_pointer (&priv->slider_widget, gtk_widget_unparent);
g_clear_pointer (&priv->fill_widget, gtk_widget_unparent);
g_clear_pointer (&priv->highlight_widget, gtk_widget_unparent);
g_clear_pointer (&priv->trough_widget, gtk_widget_unparent);
G_OBJECT_CLASS (gtk_range_parent_class)->finalize (object);
}
static void
gtk_range_measure_trough (GtkGizmo *gizmo,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkWidget *widget = gtk_widget_get_parent (GTK_WIDGET (gizmo));
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
int min, nat;
gtk_widget_measure (priv->slider_widget,
orientation, -1,
minimum, natural,
NULL, NULL);
if (priv->fill_widget)
{
gtk_widget_measure (priv->fill_widget,
orientation, for_size,
&min, &nat,
NULL, NULL);
*minimum = MAX (*minimum, min);
*natural = MAX (*natural, nat);
}
if (priv->highlight_widget)
{
gtk_widget_measure (priv->highlight_widget,
orientation, for_size,
&min, &nat,
NULL, NULL);
*minimum = MAX (*minimum, min);
*natural = MAX (*natural, nat);
}
}
static void
gtk_range_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkBorder border = { 0 };
/* Measure the main box */
gtk_widget_measure (priv->trough_widget,
orientation,
-1,
minimum, natural,
NULL, NULL);
if (GTK_RANGE_GET_CLASS (range)->get_range_border)
GTK_RANGE_GET_CLASS (range)->get_range_border (range, &border);
/* Add the border */
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
*minimum += border.left + border.right;
*natural += border.left + border.right;
}
else
{
*minimum += border.top + border.bottom;
*natural += border.top + border.bottom;
}
}
static void
gtk_range_allocate_trough (GtkGizmo *gizmo,
int width,
int height,
int baseline)
{
GtkWidget *widget = gtk_widget_get_parent (GTK_WIDGET (gizmo));
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkAllocation slider_alloc;
const double lower = gtk_adjustment_get_lower (priv->adjustment);
const double upper = gtk_adjustment_get_upper (priv->adjustment);
const double page_size = gtk_adjustment_get_page_size (priv->adjustment);
double value;
/* Slider */
gtk_range_calc_marks (range);
gtk_range_compute_slider_position (range,
gtk_adjustment_get_value (priv->adjustment),
&slider_alloc);
gtk_widget_size_allocate (priv->slider_widget, &slider_alloc, -1);
priv->slider_x = slider_alloc.x;
priv->slider_y = slider_alloc.y;
if (lower == upper)
value = 0;
else
value = (gtk_adjustment_get_value (priv->adjustment) - lower) /
(upper - page_size - lower);
if (priv->show_fill_level &&
upper - page_size - lower != 0)
{
double level, fill;
GtkAllocation fill_alloc;
fill_alloc = (GtkAllocation) {0, 0, width, height};
level = CLAMP (priv->fill_level, lower, upper - page_size);
fill = (level - lower) / (upper - lower - page_size);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
fill_alloc.width *= fill;
if (should_invert (range))
fill_alloc.x += width - fill_alloc.width;
}
else
{
fill_alloc.height *= fill;
if (should_invert (range))
fill_alloc.y += height - fill_alloc.height;
}
gtk_widget_size_allocate (priv->fill_widget, &fill_alloc, -1);
}
if (priv->highlight_widget)
{
GtkAllocation highlight_alloc;
int min, nat;
gtk_widget_measure (priv->highlight_widget,
priv->orientation, -1,
&min, &nat,
NULL, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
highlight_alloc.y = 0;
highlight_alloc.width = MAX (min, value * width);
highlight_alloc.height = height;
if (!should_invert (range))
highlight_alloc.x = 0;
else
highlight_alloc.x = width - highlight_alloc.width;
}
else
{
highlight_alloc.x = 0;
highlight_alloc.width = width;
highlight_alloc.height = MAX (min, height * value);
if (!should_invert (range))
highlight_alloc.y = 0;
else
highlight_alloc.y = height - highlight_alloc.height;
}
gtk_widget_size_allocate (priv->highlight_widget, &highlight_alloc, -1);
}
}
/* Clamp dimensions and border inside allocation, such that we prefer
* to take space from border not dimensions in all directions, and prefer to
* give space to border over dimensions in one direction.
*/
static void
clamp_dimensions (int range_width,
int range_height,
int *width,
int *height,
GtkBorder *border,
gboolean border_expands_horizontally)
{
int extra, shortage;
/* Width */
extra = range_width - border->left - border->right - *width;
if (extra > 0)
{
if (border_expands_horizontally)
{
border->left += extra / 2;
border->right += extra / 2 + extra % 2;
}
else
{
*width += extra;
}
}
/* See if we can fit rect, if not kill the border */
shortage = *width - range_width;
if (shortage > 0)
{
*width = range_width;
/* lose the border */
border->left = 0;
border->right = 0;
}
else
{
/* See if we can fit rect with borders */
shortage = *width + border->left + border->right - range_width;
if (shortage > 0)
{
/* Shrink borders */
border->left -= shortage / 2;
border->right -= shortage / 2 + shortage % 2;
}
}
/* Height */
extra = range_height - border->top - border->bottom - *height;
if (extra > 0)
{
if (border_expands_horizontally)
{
/* don't expand border vertically */
*height += extra;
}
else
{
border->top += extra / 2;
border->bottom += extra / 2 + extra % 2;
}
}
/* See if we can fit rect, if not kill the border */
shortage = *height - range_height;
if (shortage > 0)
{
*height = range_height;
/* lose the border */
border->top = 0;
border->bottom = 0;
}
else
{
/* See if we can fit rect with borders */
shortage = *height + border->top + border->bottom - range_height;
if (shortage > 0)
{
/* Shrink borders */
border->top -= shortage / 2;
border->bottom -= shortage / 2 + shortage % 2;
}
}
}
static void
gtk_range_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkBorder border = { 0 };
GtkAllocation box_alloc;
int box_min_width, box_min_height;
if (GTK_RANGE_GET_CLASS (range)->get_range_border)
GTK_RANGE_GET_CLASS (range)->get_range_border (range, &border);
gtk_widget_measure (priv->trough_widget,
GTK_ORIENTATION_HORIZONTAL, -1,
&box_min_width, NULL,
NULL, NULL);
gtk_widget_measure (priv->trough_widget,
GTK_ORIENTATION_VERTICAL, -1,
&box_min_height, NULL,
NULL, NULL);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
clamp_dimensions (width, height, &box_min_width, &box_min_height, &border, TRUE);
else
clamp_dimensions (width, height, &box_min_width, &box_min_height, &border, FALSE);
box_alloc.x = border.left;
box_alloc.y = border.top;
box_alloc.width = box_min_width;
box_alloc.height = box_min_height;
gtk_widget_size_allocate (priv->trough_widget, &box_alloc, -1);
}
static void
gtk_range_unmap (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
stop_scrolling (range);
GTK_WIDGET_CLASS (gtk_range_parent_class)->unmap (widget);
}
static void
gtk_range_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction)
{
GtkRange *range = GTK_RANGE (widget);
update_fill_position (range);
update_highlight_position (range);
GTK_WIDGET_CLASS (gtk_range_parent_class)->direction_changed (widget, previous_direction);
}
static void
gtk_range_render_trough (GtkGizmo *gizmo,
GtkSnapshot *snapshot)
{
GtkWidget *widget = gtk_widget_get_parent (GTK_WIDGET (gizmo));
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
/* HACK: GtkColorScale wants to draw its own trough
* so we let it...
*/
if (GTK_IS_COLOR_SCALE (widget))
{
GtkCssBoxes boxes;
gtk_css_boxes_init (&boxes, GTK_WIDGET (gizmo));
gtk_snapshot_push_rounded_clip (snapshot, gtk_css_boxes_get_padding_box (&boxes));
gtk_color_scale_snapshot_trough (GTK_COLOR_SCALE (widget), snapshot,
gtk_widget_get_width (GTK_WIDGET (gizmo)),
gtk_widget_get_height (GTK_WIDGET (gizmo)));
gtk_snapshot_pop (snapshot);
}
if (priv->show_fill_level &&
gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) -
gtk_adjustment_get_lower (priv->adjustment) != 0)
gtk_widget_snapshot_child (GTK_WIDGET (gizmo), priv->fill_widget, snapshot);
if (priv->highlight_widget)
{
GtkCssBoxes boxes;
gtk_css_boxes_init (&boxes, GTK_WIDGET (gizmo));
gtk_snapshot_push_rounded_clip(snapshot, gtk_css_boxes_get_padding_box (&boxes));
gtk_widget_snapshot_child (GTK_WIDGET (gizmo), priv->highlight_widget, snapshot);
gtk_snapshot_pop (snapshot);
}
gtk_widget_snapshot_child (GTK_WIDGET (gizmo), priv->slider_widget, snapshot);
}
static void
range_grab_add (GtkRange *range,
GtkWidget *location)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
/* Don't perform any GDK/GTK grab here. Since a button
* is down, there's an ongoing implicit grab on
* the widget, which pretty much guarantees this
* is the only widget receiving the pointer events.
*/
priv->grab_location = location;
gtk_widget_add_css_class (GTK_WIDGET (range), "dragging");
}
static void
update_zoom_state (GtkRange *range,
gboolean enabled)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (enabled)
gtk_widget_add_css_class (GTK_WIDGET (range), "fine-tune");
else
gtk_widget_remove_css_class (GTK_WIDGET (range), "fine-tune");
priv->zoom = enabled;
}
static void
range_grab_remove (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (!priv->grab_location)
return;
priv->grab_location = NULL;
update_zoom_state (range, FALSE);
gtk_widget_remove_css_class (GTK_WIDGET (range), "dragging");
}
static GtkScrollType
range_get_scroll_for_grab (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (!priv->grab_location)
return GTK_SCROLL_NONE;
/* In the trough */
if (priv->grab_location == priv->trough_widget)
{
if (priv->trough_click_forward)
return GTK_SCROLL_PAGE_FORWARD;
else
return GTK_SCROLL_PAGE_BACKWARD;
}
return GTK_SCROLL_NONE;
}
static double
coord_to_value (GtkRange *range,
double coord)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double frac;
double value;
int trough_length;
int slider_length;
graphene_rect_t slider_bounds;
if (!gtk_widget_compute_bounds (priv->slider_widget, priv->slider_widget, &slider_bounds))
graphene_rect_init (&slider_bounds, 0, 0, gtk_widget_get_width (priv->trough_widget), gtk_widget_get_height (priv->trough_widget));
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
trough_length = gtk_widget_get_width (priv->trough_widget);
slider_length = slider_bounds.size.width;
}
else
{
trough_length = gtk_widget_get_height (priv->trough_widget);
slider_length = slider_bounds.size.height;
}
if (trough_length == slider_length)
{
frac = 1.0;
}
else
{
if (priv->slider_size_fixed)
frac = CLAMP (coord / (double) trough_length, 0, 1);
else
frac = CLAMP (coord / (double) (trough_length - slider_length), 0, 1);
}
if (should_invert (range))
frac = 1.0 - frac;
value = gtk_adjustment_get_lower (priv->adjustment) +
frac * (gtk_adjustment_get_upper (priv->adjustment) -
gtk_adjustment_get_lower (priv->adjustment) -
gtk_adjustment_get_page_size (priv->adjustment));
return value;
}
static gboolean
gtk_range_key_controller_key_pressed (GtkEventControllerKey *controller,
guint keyval,
guint keycode,
GdkModifierType state,
GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (gtk_gesture_is_active (priv->drag_gesture) &&
keyval == GDK_KEY_Escape &&
priv->grab_location != NULL)
{
stop_scrolling (range);
return GDK_EVENT_STOP;
}
else if (priv->in_drag &&
(keyval == GDK_KEY_Shift_L ||
keyval == GDK_KEY_Shift_R))
{
graphene_rect_t slider_bounds;
if (!gtk_widget_compute_bounds (priv->slider_widget, priv->trough_widget, &slider_bounds))
return GDK_EVENT_STOP;
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
priv->slide_initial_slider_position = slider_bounds.origin.y;
else
priv->slide_initial_slider_position = slider_bounds.origin.x;
update_zoom_state (range, !priv->zoom);
return GDK_EVENT_STOP;
}
return GDK_EVENT_PROPAGATE;
}
static void
update_initial_slider_position (GtkRange *range,
double x,
double y)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
graphene_point_t p;
if (!gtk_widget_compute_point (GTK_WIDGET (range), priv->trough_widget,
&GRAPHENE_POINT_INIT (x, y), &p))
graphene_point_init (&p, x, y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
priv->slide_initial_slider_position = MAX (0, priv->slider_x);
priv->slide_initial_coordinate_delta = p.x - priv->slide_initial_slider_position;
}
else
{
priv->slide_initial_slider_position = MAX (0, priv->slider_y);
priv->slide_initial_coordinate_delta = p.y - priv->slide_initial_slider_position;
}
}
static void
gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture,
double x,
double y,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkWidget *mouse_location;
mouse_location = gtk_widget_pick (GTK_WIDGET (range), x, y, GTK_PICK_DEFAULT);
if (mouse_location == priv->slider_widget && !priv->zoom)
{
update_initial_slider_position (range, x, y);
update_zoom_state (range, TRUE);
}
}
static void
gtk_range_click_gesture_pressed (GtkGestureClick *gesture,
guint n_press,
double x,
double y,
GtkRange *range)
{
GtkWidget *widget = GTK_WIDGET (range);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GdkDevice *source_device;
GdkEventSequence *sequence;
GdkEvent *event;
GdkInputSource source;
gboolean primary_warps;
gboolean shift_pressed;
guint button;
GdkModifierType state_mask;
GtkWidget *mouse_location;
if (!gtk_widget_has_focus (widget))
gtk_widget_grab_focus (widget);
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));
event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
state_mask = gdk_event_get_modifier_state (event);
shift_pressed = (state_mask & GDK_SHIFT_MASK) != 0;
source_device = gdk_event_get_device ((GdkEvent *) event);
source = gdk_device_get_source (source_device);
g_object_get (gtk_widget_get_settings (widget),
"gtk-primary-button-warps-slider", &primary_warps,
NULL);
mouse_location = gtk_widget_pick (widget, x, y, 0);
/* For the purposes of this function, we treat anything outside
* the slider like a click on the trough
*/
if (mouse_location != priv->slider_widget)
mouse_location = priv->trough_widget;
if (mouse_location == priv->slider_widget)
{
/* Shift-click in the slider = fine adjustment */
if (shift_pressed)
update_zoom_state (range, TRUE);
update_initial_slider_position (range, x, y);
range_grab_add (range, priv->slider_widget);
}
else if (mouse_location == priv->trough_widget &&
(source == GDK_SOURCE_TOUCHSCREEN ||
(primary_warps && !shift_pressed && button == GDK_BUTTON_PRIMARY) ||
(!primary_warps && shift_pressed && button == GDK_BUTTON_PRIMARY) ||
(!primary_warps && button == GDK_BUTTON_MIDDLE)))
{
graphene_point_t p;
graphene_rect_t slider_bounds;
if (!gtk_widget_compute_point (priv->trough_widget, widget,
&GRAPHENE_POINT_INIT (priv->slider_x, priv->slider_y),
&p))
graphene_point_init (&p, priv->slider_x, priv->slider_y);
/* If we aren't fixed, center on the slider. I.e. if this is not a scale... */
if (!priv->slider_size_fixed &&
gtk_widget_compute_bounds (priv->slider_widget, priv->slider_widget, &slider_bounds))
{
p.x += (slider_bounds.size.width / 2);
p.y += (slider_bounds.size.height / 2);
}
update_initial_slider_position (range, p.x, p.y);
range_grab_add (range, priv->slider_widget);
update_slider_position (range, x, y);
}
else if (mouse_location == priv->trough_widget &&
((primary_warps && shift_pressed && button == GDK_BUTTON_PRIMARY) ||
(!primary_warps && !shift_pressed && button == GDK_BUTTON_PRIMARY) ||
(primary_warps && button == GDK_BUTTON_MIDDLE)))
{
/* jump by pages */
GtkScrollType scroll;
double click_value;
click_value = coord_to_value (range,
priv->orientation == GTK_ORIENTATION_VERTICAL ?
y : x);
priv->trough_click_forward = click_value > gtk_adjustment_get_value (priv->adjustment);
range_grab_add (range, priv->trough_widget);
scroll = range_get_scroll_for_grab (range);
gtk_range_add_step_timer (range, scroll);
}
else if (mouse_location == priv->trough_widget &&
button == GDK_BUTTON_SECONDARY)
{
/* autoscroll */
double click_value;
click_value = coord_to_value (range,
priv->orientation == GTK_ORIENTATION_VERTICAL ?
y : x);
priv->trough_click_forward = click_value > gtk_adjustment_get_value (priv->adjustment);
range_grab_add (range, priv->trough_widget);
remove_autoscroll (range);
priv->autoscroll_mode = priv->trough_click_forward ? GTK_SCROLL_END : GTK_SCROLL_START;
add_autoscroll (range);
}
if (priv->grab_location == priv->slider_widget);
/* leave it to ::drag-begin to claim the sequence */
else if (priv->grab_location != NULL)
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
}
/* During a slide, move the slider as required given new mouse position */
static void
update_slider_position (GtkRange *range,
int mouse_x,
int mouse_y)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
graphene_rect_t trough_bounds;
double delta;
double c;
double new_value;
gboolean handled;
double next_value;
double mark_value;
double mark_delta;
double zoom;
int i;
graphene_point_t p;
if (!gtk_widget_compute_point(GTK_WIDGET (range), priv->trough_widget,
&GRAPHENE_POINT_INIT (mouse_x, mouse_y), &p))
graphene_point_init (&p, mouse_x, mouse_y);
if (priv->zoom &&
gtk_widget_compute_bounds (priv->trough_widget, priv->trough_widget, &trough_bounds))
{
zoom = MIN(1.0, (priv->orientation == GTK_ORIENTATION_VERTICAL ?
trough_bounds.size.height : trough_bounds.size.width) /
(gtk_adjustment_get_upper (priv->adjustment) -
gtk_adjustment_get_lower (priv->adjustment) -
gtk_adjustment_get_page_size (priv->adjustment)));
/* the above is ineffective for scales, so just set a zoom factor */
if (zoom == 1.0)
zoom = 0.25;
}
else
zoom = 1.0;
/* recalculate the initial position from the current position */
if (priv->slide_initial_slider_position == -1)
{
graphene_rect_t slider_bounds;
double zoom_divisor;
if (!gtk_widget_compute_bounds (priv->slider_widget, GTK_WIDGET (range), &slider_bounds))
graphene_rect_init (&slider_bounds, 0, 0, 0, 0);
if (zoom == 1.0)
zoom_divisor = 1.0;
else
zoom_divisor = zoom - 1.0;
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
priv->slide_initial_slider_position = (zoom * (p.y - priv->slide_initial_coordinate_delta) - slider_bounds.origin.y) / zoom_divisor;
else
priv->slide_initial_slider_position = (zoom * (p.x - priv->slide_initial_coordinate_delta) - slider_bounds.origin.x) / zoom_divisor;
}
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
delta = p.y - (priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position);
else
delta = p.x - (priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position);
c = priv->slide_initial_slider_position + zoom * delta;
new_value = coord_to_value (range, c);
next_value = coord_to_value (range, c + 1);
mark_delta = fabs (next_value - new_value);
for (i = 0; i < priv->n_marks; i++)
{
mark_value = priv->marks[i];
if (fabs (gtk_adjustment_get_value (priv->adjustment) - mark_value) < 3 * mark_delta)
{
if (fabs (new_value - mark_value) < MARK_SNAP_LENGTH * mark_delta)
{
new_value = mark_value;
break;
}
}
}
g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, new_value, &handled);
}
static void
remove_autoscroll (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (priv->autoscroll_id)
{
gtk_widget_remove_tick_callback (GTK_WIDGET (range),
priv->autoscroll_id);
priv->autoscroll_id = 0;
}
/* unset initial position so it can be calculated */
priv->slide_initial_slider_position = -1;
priv->autoscroll_mode = GTK_SCROLL_NONE;
}
static gboolean
autoscroll_cb (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkAdjustment *adj = priv->adjustment;
double increment;
double value;
gboolean handled;
double step, page;
step = gtk_adjustment_get_step_increment (adj);
page = gtk_adjustment_get_page_increment (adj);
switch ((guint) priv->autoscroll_mode)
{
case GTK_SCROLL_STEP_FORWARD:
increment = step / AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_PAGE_FORWARD:
increment = page / AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_STEP_BACKWARD:
increment = - step / AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_PAGE_BACKWARD:
increment = - page / AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_START:
case GTK_SCROLL_END:
{
double x, y;
double distance, t;
/* Vary scrolling speed from slow (ie step) to fast (2 * page),
* based on the distance of the pointer from the widget. We start
* speeding up if the pointer moves at least 20 pixels away, and
* we reach maximum speed when it is 220 pixels away.
*/
if (!gtk_gesture_drag_get_offset (GTK_GESTURE_DRAG (priv->drag_gesture), &x, &y))
{
x = 0.0;
y = 0.0;
}
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (range)) == GTK_ORIENTATION_HORIZONTAL)
distance = fabs (y);
else
distance = fabs (x);
distance = CLAMP (distance - 20, 0.0, 200);
t = distance / 100.0;
step = (1 - t) * step + t * page;
if (priv->autoscroll_mode == GTK_SCROLL_END)
increment = step / AUTOSCROLL_FACTOR;
else
increment = - step / AUTOSCROLL_FACTOR;
}
break;
default:
g_assert_not_reached ();
break;
}
value = gtk_adjustment_get_value (adj);
value += increment;
g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, value, &handled);
return G_SOURCE_CONTINUE;
}
static void
add_autoscroll (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (priv->autoscroll_id != 0 ||
priv->autoscroll_mode == GTK_SCROLL_NONE)
return;
priv->autoscroll_id = gtk_widget_add_tick_callback (GTK_WIDGET (range),
autoscroll_cb, range, NULL);
}
static void
stop_scrolling (GtkRange *range)
{
range_grab_remove (range);
gtk_range_remove_step_timer (range);
remove_autoscroll (range);
}
static gboolean
gtk_range_scroll_controller_scroll (GtkEventControllerScroll *scroll,
double dx,
double dy,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double delta;
gboolean handled;
GtkOrientation move_orientation;
GdkScrollUnit scroll_unit;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL && dx != 0)
{
move_orientation = GTK_ORIENTATION_HORIZONTAL;
delta = dx;
}
else
{
move_orientation = GTK_ORIENTATION_VERTICAL;
delta = dy;
}
scroll_unit = gtk_event_controller_scroll_get_unit (scroll);
if (scroll_unit == GDK_SCROLL_UNIT_WHEEL)
{
delta *= gtk_adjustment_get_page_increment (priv->adjustment);
}
if (delta != 0 && should_invert_move (range, move_orientation))
delta = - delta;
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_JUMP, gtk_adjustment_get_value (priv->adjustment) + delta,
&handled);
return GDK_EVENT_STOP;
}
static void
update_autoscroll_mode (GtkRange *range,
int mouse_x,
int mouse_y)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkScrollType mode = GTK_SCROLL_NONE;
if (priv->zoom)
{
int width, height;
int size, pos;
width = gtk_widget_get_width (GTK_WIDGET (range));
height = gtk_widget_get_height (GTK_WIDGET (range));
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
size = height;
pos = mouse_y;
}
else
{
size = width;
pos = mouse_x;
}
if (pos < SCROLL_EDGE_SIZE)
mode = priv->inverted ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD;
else if (pos > (size - SCROLL_EDGE_SIZE))
mode = priv->inverted ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD;
}
if (mode != priv->autoscroll_mode)
{
remove_autoscroll (range);
priv->autoscroll_mode = mode;
add_autoscroll (range);
}
}
static void
gtk_range_drag_gesture_update (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double start_x, start_y;
if (priv->grab_location == priv->slider_widget)
{
int mouse_x, mouse_y;
gtk_gesture_drag_get_start_point (gesture, &start_x, &start_y);
mouse_x = start_x + offset_x;
mouse_y = start_y + offset_y;
priv->in_drag = TRUE;
update_autoscroll_mode (range, mouse_x, mouse_y);
if (priv->autoscroll_mode == GTK_SCROLL_NONE)
update_slider_position (range, mouse_x, mouse_y);
}
}
static void
gtk_range_drag_gesture_begin (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (priv->grab_location == priv->slider_widget)
gtk_gesture_set_state (priv->drag_gesture, GTK_EVENT_SEQUENCE_CLAIMED);
}
static void
gtk_range_drag_gesture_end (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
priv->in_drag = FALSE;
stop_scrolling (range);
}
static void
gtk_range_adjustment_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double upper = gtk_adjustment_get_upper (priv->adjustment);
double lower = gtk_adjustment_get_lower (priv->adjustment);
gtk_widget_set_visible (priv->slider_widget, upper != lower || !GTK_IS_SCALE (range));
gtk_widget_queue_allocate (priv->trough_widget);
gtk_accessible_update_property (GTK_ACCESSIBLE (range),
GTK_ACCESSIBLE_PROPERTY_VALUE_MAX, upper,
GTK_ACCESSIBLE_PROPERTY_VALUE_MIN, lower,
-1);
/* Note that we don't round off to priv->round_digits here.
* that's because it's really broken to change a value
* in response to a change signal on that value; round_digits
* is therefore defined to be a filter on what the GtkRange
* can input into the adjustment, not a filter that the GtkRange
* will enforce on the adjustment.
*/
}
static void
gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
/* Note that we don't round off to priv->round_digits here.
* that's because it's really broken to change a value
* in response to a change signal on that value; round_digits
* is therefore defined to be a filter on what the GtkRange
* can input into the adjustment, not a filter that the GtkRange
* will enforce on the adjustment.
*/
g_signal_emit (range, signals[VALUE_CHANGED], 0);
gtk_accessible_update_property (GTK_ACCESSIBLE (range),
GTK_ACCESSIBLE_PROPERTY_VALUE_NOW, gtk_adjustment_get_value (adjustment),
-1);
gtk_widget_queue_allocate (priv->trough_widget);
}
static void
apply_marks (GtkRange *range,
double oldval,
double *newval)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
int i;
double mark;
for (i = 0; i < priv->n_marks; i++)
{
mark = priv->marks[i];
if ((oldval < mark && mark < *newval) ||
(oldval > mark && mark > *newval))
{
*newval = mark;
return;
}
}
}
static void
step_back (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double newval;
gboolean handled;
newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_step_increment (priv->adjustment);
apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_STEP_BACKWARD, newval, &handled);
}
static void
step_forward (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double newval;
gboolean handled;
newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_step_increment (priv->adjustment);
apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_STEP_FORWARD, newval, &handled);
}
static void
page_back (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double newval;
gboolean handled;
newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_page_increment (priv->adjustment);
apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_PAGE_BACKWARD, newval, &handled);
}
static void
page_forward (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double newval;
gboolean handled;
newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_page_increment (priv->adjustment);
apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_PAGE_FORWARD, newval, &handled);
}
static void
scroll_begin (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gboolean handled;
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_START, gtk_adjustment_get_lower (priv->adjustment),
&handled);
}
static void
scroll_end (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double newval;
gboolean handled;
newval = gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment);
g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_END, newval,
&handled);
}
static gboolean
gtk_range_scroll (GtkRange *range,
GtkScrollType scroll)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
double old_value = gtk_adjustment_get_value (priv->adjustment);
switch (scroll)
{
case GTK_SCROLL_STEP_LEFT:
if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL))
step_forward (range);
else
step_back (range);
break;
case GTK_SCROLL_STEP_UP:
if (should_invert_move (range, GTK_ORIENTATION_VERTICAL))
step_forward (range);
else
step_back (range);
break;
case GTK_SCROLL_STEP_RIGHT:
if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL))
step_back (range);
else
step_forward (range);
break;
case GTK_SCROLL_STEP_DOWN:
if (should_invert_move (range, GTK_ORIENTATION_VERTICAL))
step_back (range);
else
step_forward (range);
break;
case GTK_SCROLL_STEP_BACKWARD:
step_back (range);
break;
case GTK_SCROLL_STEP_FORWARD:
step_forward (range);
break;
case GTK_SCROLL_PAGE_LEFT:
if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL))
page_forward (range);
else
page_back (range);
break;
case GTK_SCROLL_PAGE_UP:
if (should_invert_move (range, GTK_ORIENTATION_VERTICAL))
page_forward (range);
else
page_back (range);
break;
case GTK_SCROLL_PAGE_RIGHT:
if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL))
page_back (range);
else
page_forward (range);
break;
case GTK_SCROLL_PAGE_DOWN:
if (should_invert_move (range, GTK_ORIENTATION_VERTICAL))
page_back (range);
else
page_forward (range);
break;
case GTK_SCROLL_PAGE_BACKWARD:
page_back (range);
break;
case GTK_SCROLL_PAGE_FORWARD:
page_forward (range);
break;
case GTK_SCROLL_START:
scroll_begin (range);
break;
case GTK_SCROLL_END:
scroll_end (range);
break;
case GTK_SCROLL_JUMP:
case GTK_SCROLL_NONE:
default:
break;
}
return gtk_adjustment_get_value (priv->adjustment) != old_value;
}
static void
gtk_range_move_slider (GtkRange *range,
GtkScrollType scroll)
{
if (! gtk_range_scroll (range, scroll))
gtk_widget_error_bell (GTK_WIDGET (range));
}
static void
gtk_range_compute_slider_position (GtkRange *range,
double adjustment_value,
GdkRectangle *slider_rect)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
const double upper = gtk_adjustment_get_upper (priv->adjustment);
const double lower = gtk_adjustment_get_lower (priv->adjustment);
const double page_size = gtk_adjustment_get_page_size (priv->adjustment);
int trough_width, trough_height;
int slider_width, slider_height;
gtk_widget_measure (priv->slider_widget,
GTK_ORIENTATION_HORIZONTAL, -1,
&slider_width, NULL,
NULL, NULL);
gtk_widget_measure (priv->slider_widget,
GTK_ORIENTATION_VERTICAL, slider_width,
&slider_height, NULL,
NULL, NULL);
trough_width = gtk_widget_get_width (priv->trough_widget);
trough_height = gtk_widget_get_height (priv->trough_widget);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
int y, height;
slider_rect->x = (int) floor ((trough_width - slider_width) / 2);
slider_rect->width = slider_width;
/* slider height is the fraction (page_size /
* total_adjustment_range) times the trough height in pixels
*/
if (upper - lower != 0)
height = trough_height * (page_size / (upper - lower));
else
height = slider_height;
if (height < slider_height ||
priv->slider_size_fixed)
height = slider_height;
height = MIN (height, trough_height);
if (upper - lower - page_size != 0)
y = (trough_height - height) * ((adjustment_value - lower) / (upper - lower - page_size));
else
y = 0;
y = CLAMP (y, 0, trough_height);
if (should_invert (range))
y = trough_height - y - height;
slider_rect->y = y;
slider_rect->height = height;
}
else
{
int x, width;
slider_rect->y = (int) floor ((trough_height - slider_height) / 2);
slider_rect->height = slider_height;
/* slider width is the fraction (page_size /
* total_adjustment_range) times the trough width in pixels
*/
if (upper - lower != 0)
width = trough_width * (page_size / (upper - lower));
else
width = slider_width;
if (width < slider_width ||
priv->slider_size_fixed)
width = slider_width;
width = MIN (width, trough_width);
if (upper - lower - page_size != 0)
x = (trough_width - width) * ((adjustment_value - lower) / (upper - lower - page_size));
else
x = 0;
x = CLAMP (x, 0, trough_width);
if (should_invert (range))
x = trough_width - x - width;
slider_rect->x = x;
slider_rect->width = width;
}
}
static void
gtk_range_calc_marks (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GdkRectangle slider;
graphene_point_t p;
int i;
for (i = 0; i < priv->n_marks; i++)
{
gtk_range_compute_slider_position (range, priv->marks[i], &slider);
if (!gtk_widget_compute_point (priv->trough_widget, GTK_WIDGET (range),
&GRAPHENE_POINT_INIT (slider.x, slider.y), &p))
graphene_point_init (&p, slider.x, slider.y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
priv->mark_pos[i] = p.x + slider.width / 2;
else
priv->mark_pos[i] = p.y + slider.height / 2;
}
}
static gboolean
gtk_range_real_change_value (GtkRange *range,
GtkScrollType scroll,
double value)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
/* potentially adjust the bounds _before_ we clamp */
g_signal_emit (range, signals[ADJUST_BOUNDS], 0, value);
if (priv->restrict_to_fill_level)
value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment),
priv->fill_level));
value = CLAMP (value, gtk_adjustment_get_lower (priv->adjustment),
(gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
if (priv->round_digits >= 0)
{
double power;
int i;
i = priv->round_digits;
power = 1;
while (i--)
power *= 10;
value = floor ((value * power) + 0.5) / power;
}
if (priv->in_drag || priv->autoscroll_id)
gtk_adjustment_set_value (priv->adjustment, value);
else
gtk_adjustment_animate_to_value (priv->adjustment, value);
return FALSE;
}
struct _GtkRangeStepTimer
{
guint timeout_id;
GtkScrollType step;
};
static gboolean
second_timeout (gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gtk_range_scroll (range, priv->timer->step);
return G_SOURCE_CONTINUE;
}
static gboolean
initial_timeout (gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
priv->timer->timeout_id = g_timeout_add (TIMEOUT_REPEAT, second_timeout, range);
gdk_source_set_static_name_by_id (priv->timer->timeout_id, "[gtk] second_timeout");
return G_SOURCE_REMOVE;
}
static void
gtk_range_add_step_timer (GtkRange *range,
GtkScrollType step)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (priv->timer == NULL);
g_return_if_fail (step != GTK_SCROLL_NONE);
priv->timer = g_new (GtkRangeStepTimer, 1);
priv->timer->timeout_id = g_timeout_add (TIMEOUT_INITIAL, initial_timeout, range);
gdk_source_set_static_name_by_id (priv->timer->timeout_id, "[gtk] initial_timeout");
priv->timer->step = step;
gtk_range_scroll (range, priv->timer->step);
}
static void
gtk_range_remove_step_timer (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (priv->timer)
{
if (priv->timer->timeout_id != 0)
g_source_remove (priv->timer->timeout_id);
g_free (priv->timer);
priv->timer = NULL;
}
}
void
_gtk_range_set_has_origin (GtkRange *range,
gboolean has_origin)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (has_origin)
{
priv->highlight_widget = gtk_gizmo_new ("highlight", NULL, NULL, NULL, NULL, NULL, NULL);
gtk_widget_insert_before (priv->highlight_widget, priv->trough_widget, priv->slider_widget);
update_highlight_position (range);
}
else
{
g_clear_pointer (&priv->highlight_widget, gtk_widget_unparent);
}
}
gboolean
_gtk_range_get_has_origin (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
return priv->highlight_widget != NULL;
}
void
_gtk_range_set_stop_values (GtkRange *range,
double *values,
int n_values)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
int i;
g_free (priv->marks);
priv->marks = g_new (double, n_values);
g_free (priv->mark_pos);
priv->mark_pos = g_new (int, n_values);
priv->n_marks = n_values;
for (i = 0; i < n_values; i++)
priv->marks[i] = values[i];
gtk_range_calc_marks (range);
}
int
_gtk_range_get_stop_positions (GtkRange *range,
int **values)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gtk_range_calc_marks (range);
if (values)
*values = g_memdup2 (priv->mark_pos, priv->n_marks * sizeof (int));
return priv->n_marks;
}
/**
* gtk_range_set_round_digits: (attributes org.gtk.Method.set_property=round-digits)
* @range: a `GtkRange`
* @round_digits: the precision in digits, or -1
*
* Sets the number of digits to round the value to when
* it changes.
*
* See [signal@Gtk.Range::change-value].
*/
void
gtk_range_set_round_digits (GtkRange *range,
int round_digits)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (round_digits >= -1);
if (priv->round_digits != round_digits)
{
priv->round_digits = round_digits;
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_ROUND_DIGITS]);
}
}
/**
* gtk_range_get_round_digits: (attributes org.gtk.Method.get_property=round-digits)
* @range: a `GtkRange`
*
* Gets the number of digits to round the value to when
* it changes.
*
* See [signal@Gtk.Range::change-value].
*
* Returns: the number of digits to round to
*/
int
gtk_range_get_round_digits (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
g_return_val_if_fail (GTK_IS_RANGE (range), -1);
return priv->round_digits;
}
GtkWidget *
gtk_range_get_slider_widget (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
return priv->slider_widget;
}
GtkWidget *
gtk_range_get_trough_widget (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
return priv->trough_widget;
}
void
gtk_range_start_autoscroll (GtkRange *range,
GtkScrollType scroll_type)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
remove_autoscroll (range);
priv->autoscroll_mode = scroll_type;
add_autoscroll (range);
}
void
gtk_range_stop_autoscroll (GtkRange *range)
{
remove_autoscroll (range);
}
Reference in New Issue View Git Blame Copy Permalink