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gtk2/gtk/gtkrange.c
Timm Bäder 20935f678b scale: Rearrange child widgets 
Always keep the order:

 - [value]
 - [marks.top]
 - [marks.bottom]
 - trough

Which makes sense given the rendering order. Slider should be drawn
after the marks.

Makes it possible to simply remove the custom snapshot implementations
in scale and range. And Adwaita does not depend on the node order
anyway.
2020-06-27 10:51:06 +02:00

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/* 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 "gtkadjustmentprivate.h"
#include "gtkcolorscaleprivate.h"
#include "gtkeventcontrollerkey.h"
#include "gtkeventcontrollerscroll.h"
#include "gtkgesturedrag.h"
#include "gtkgesturelongpressprivate.h"
#include "gtkgestureclick.h"
#include "gtkgizmoprivate.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtkorientable.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "a11y/gtkrangeaccessible.h"
#include <stdio.h>
#include <math.h>
/**
* SECTION:gtkrange
* @Short_description: Base class for widgets which visualize an adjustment
* @Title: GtkRange
*
* #GtkRange is the common base class for widgets which visualize an
* adjustment, e.g #GtkScale or #GtkScrollbar.
*
* Apart from signals for monitoring the parameters of the adjustment,
* #GtkRange provides properties and methods for setting a
* “fill level” on range widgets. See 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;
GtkOrientation orientation;
gdouble fill_level;
gdouble *marks;
gint *mark_pos;
gint n_marks;
gint round_digits; /* Round off value to this many digits, -1 for no rounding */
gint slide_initial_slider_position;
gint 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;
GtkGesture *drag_gesture;
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,
gdouble x,
gdouble y,
GtkRange *range);
static void gtk_range_click_gesture_released (GtkGestureClick *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkRange *range);
static void gtk_range_drag_gesture_begin (GtkGestureDrag *gesture,
gdouble offset_x,
gdouble offset_y,
GtkRange *range);
static void gtk_range_drag_gesture_update (GtkGestureDrag *gesture,
gdouble offset_x,
gdouble offset_y,
GtkRange *range);
static void gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture,
gdouble x,
gdouble 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,
gdouble 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,
gdouble 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,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *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,
gdouble dx,
gdouble dy,
GtkRange *range);
G_DEFINE_TYPE_WITH_CODE (GtkRange, gtk_range, GTK_TYPE_WIDGET,
G_ADD_PRIVATE (GtkRange)
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
*
* The #GtkRange::change-value signal is 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 GtkRange::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 #GtkRange: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_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation");
properties[PROP_ADJUSTMENT] =
g_param_spec_object ("adjustment",
P_("Adjustment"),
P_("The GtkAdjustment that contains the current value of this range object"),
GTK_TYPE_ADJUSTMENT,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT);
properties[PROP_INVERTED] =
g_param_spec_boolean ("inverted",
P_("Inverted"),
P_("Invert direction slider moves to increase range value"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:show-fill-level:
*
* The show-fill-level property controls whether fill level indicator
* graphics are displayed on the trough. See
* gtk_range_set_show_fill_level().
**/
properties[PROP_SHOW_FILL_LEVEL] =
g_param_spec_boolean ("show-fill-level",
P_("Show Fill Level"),
P_("Whether to display a fill level indicator graphics on trough."),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:restrict-to-fill-level:
*
* The restrict-to-fill-level property controls whether slider
* movement is restricted to an upper boundary set by the
* fill level. See gtk_range_set_restrict_to_fill_level().
**/
properties[PROP_RESTRICT_TO_FILL_LEVEL] =
g_param_spec_boolean ("restrict-to-fill-level",
P_("Restrict to Fill Level"),
P_("Whether to restrict the upper boundary to the fill level."),
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:fill-level:
*
* The fill level (e.g. prebuffering of a network stream).
* See gtk_range_set_fill_level().
**/
properties[PROP_FILL_LEVEL] =
g_param_spec_double ("fill-level",
P_("Fill Level"),
P_("The fill level."),
-G_MAXDOUBLE, G_MAXDOUBLE,
G_MAXDOUBLE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkRange:round-digits:
*
* The number of digits to round the value to when
* it changes, or -1. See #GtkRange::change-value.
*/
properties[PROP_ROUND_DIGITS] =
g_param_spec_int ("round-digits",
P_("Round Digits"),
P_("The number of digits to round the value to."),
-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_accessible_type (widget_class, GTK_TYPE_RANGE_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, I_("range"));
}
static void
gtk_range_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkRange *range = GTK_RANGE (object);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
switch (prop_id)
{
case PROP_ORIENTATION:
if (priv->orientation != g_value_get_enum (value))
{
priv->orientation = g_value_get_enum (value);
gtk_widget_update_orientation (GTK_WIDGET (range), priv->orientation);
gtk_widget_queue_resize (GTK_WIDGET (range));
g_object_notify_by_pspec (object, pspec);
}
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 ("trough",
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);
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);
g_signal_connect (gesture, "released",
G_CALLBACK (gtk_range_click_gesture_released), range);
gtk_widget_add_controller (GTK_WIDGET (range), GTK_EVENT_CONTROLLER (gesture));
gtk_gesture_group (priv->drag_gesture, 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 (priv->drag_gesture, 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);
}
/**
* gtk_range_get_adjustment:
* @range: a #GtkRange
*
* Get the #GtkAdjustment which is the “model” object for #GtkRange.
* See gtk_range_set_adjustment() for details.
* The return value does not have a reference added, so should not
* be unreferenced.
*
* 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:
* @range: a #GtkRange
* @adjustment: a #GtkAdjustment
*
* Sets the adjustment to be used as the “model” object for this range
* widget. 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_range_adjustment_changed (adjustment, range);
gtk_range_adjustment_value_changed (adjustment, range);
{
GtkRangeAccessible *accessible =
GTK_RANGE_ACCESSIBLE (_gtk_widget_peek_accessible (GTK_WIDGET (range)));
if (accessible != NULL)
gtk_range_accessible_update_adjustment (accessible);
}
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, GTK_STYLE_CLASS_BOTTOM);
gtk_widget_remove_css_class (priv->highlight_widget, GTK_STYLE_CLASS_TOP);
}
else
{
gtk_widget_add_css_class (priv->highlight_widget, GTK_STYLE_CLASS_TOP);
gtk_widget_remove_css_class (priv->highlight_widget, GTK_STYLE_CLASS_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, GTK_STYLE_CLASS_BOTTOM);
gtk_widget_remove_css_class (priv->fill_widget, GTK_STYLE_CLASS_TOP);
}
else
{
gtk_widget_add_css_class (priv->fill_widget, GTK_STYLE_CLASS_TOP);
gtk_widget_remove_css_class (priv->fill_widget, GTK_STYLE_CLASS_BOTTOM);
}
}
/**
* gtk_range_set_inverted:
* @range: a #GtkRange
* @setting: %TRUE 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:
* @range: a #GtkRange
*
* Gets the value set by 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
*
* If a range is flippable, it will switch its direction if it is
* horizontal and its direction is %GTK_TEXT_DIR_RTL.
*
* See 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 the value set by 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 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) (allow-none): return location for the slider's
* start, or %NULL
* @slider_end: (out) (allow-none): return location for the slider's
* end, or %NULL
*
* 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,
gint *slider_start,
gint *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.y;
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 #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,
gdouble step,
gdouble 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, and clamps the range
* value 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,
gdouble min,
gdouble max)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GtkAdjustment *adjustment;
gdouble 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 #GtkRange::value-changed signal if the
* value changes.
**/
void
gtk_range_set_value (GtkRange *range,
gdouble 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.
**/
gdouble
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:
* @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
* 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:
* @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:
* @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
* 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:
* @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:
* @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 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 controller
* by gtk_range_set_restrict_to_fill_level() and is by default
* enabled.
**/
void
gtk_range_set_fill_level (GtkRange *range,
gdouble 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:
* @range: A #GtkRange
*
* Gets the current position of the fill level indicator.
*
* Returns: The current fill level
**/
gdouble
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,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline)
{
GtkWidget *widget = gtk_widget_get_parent (GTK_WIDGET (gizmo));
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gint 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 - 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)
{
gint 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))
gtk_color_scale_snapshot_trough (GTK_COLOR_SCALE (widget), snapshot,
gtk_widget_get_width (GTK_WIDGET (gizmo)),
gtk_widget_get_height (GTK_WIDGET (gizmo)));
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)
gtk_widget_snapshot_child (GTK_WIDGET (gizmo), priv->highlight_widget, 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 gdouble
coord_to_value (GtkRange *range,
gdouble coord)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gdouble frac;
gdouble value;
gint trough_length;
gint 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);
gtk_widget_translate_coordinates (GTK_WIDGET (range), priv->trough_widget,
x, y, &x, &y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
priv->slide_initial_slider_position = MAX (0, priv->slider_x);
priv->slide_initial_coordinate_delta = x - priv->slide_initial_slider_position;
}
else
{
priv->slide_initial_slider_position = MAX (0, priv->slider_y);
priv->slide_initial_coordinate_delta = y - priv->slide_initial_slider_position;
}
}
static void
gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture,
gdouble x,
gdouble 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,
gdouble x,
gdouble 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_source_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)))
{
double slider_range_x, slider_range_y;
graphene_rect_t slider_bounds;
gtk_widget_translate_coordinates (priv->trough_widget, widget,
priv->slider_x, priv->slider_y,
&slider_range_x, &slider_range_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))
{
slider_range_x += (slider_bounds.size.width / 2);
slider_range_y += (slider_bounds.size.height / 2);
}
update_initial_slider_position (range, slider_range_x, slider_range_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;
gdouble 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 */
gdouble 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);
}
static void
gtk_range_click_gesture_released (GtkGestureClick *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
priv->in_drag = FALSE;
stop_scrolling (range);
}
/* During a slide, move the slider as required given new mouse position */
static void
update_slider_position (GtkRange *range,
gint mouse_x,
gint mouse_y)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
graphene_rect_t trough_bounds;
gdouble delta;
gdouble c;
gdouble new_value;
gboolean handled;
gdouble next_value;
gdouble mark_value;
gdouble mark_delta;
gdouble zoom;
gint i;
double x, y;
gtk_widget_translate_coordinates (GTK_WIDGET (range), priv->trough_widget,
mouse_x, mouse_y, &x, &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 * (y - priv->slide_initial_coordinate_delta) - slider_bounds.origin.y) / zoom_divisor;
else
priv->slide_initial_slider_position = (zoom * (x - priv->slide_initial_coordinate_delta) - slider_bounds.origin.x) / zoom_divisor;
}
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
delta = y - (priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position);
else
delta = 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;
gdouble increment;
gdouble value;
gboolean handled;
gdouble 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:
{
gdouble x, y;
gdouble 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,
gdouble dx,
gdouble dy,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gdouble scroll_unit, delta;
gboolean handled;
GtkOrientation move_orientation;
#ifdef GDK_WINDOWING_QUARTZ
scroll_unit = 1;
#else
scroll_unit = gtk_adjustment_get_page_increment (priv->adjustment);
#endif
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL && dx != 0)
{
move_orientation = GTK_ORIENTATION_HORIZONTAL;
delta = dx * scroll_unit;
}
else
{
move_orientation = GTK_ORIENTATION_VERTICAL;
delta = dy * scroll_unit;
}
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;
gint 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,
gdouble offset_x,
gdouble offset_y,
GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gdouble 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,
gdouble offset_x,
gdouble 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_adjustment_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
if (gtk_adjustment_get_upper (priv->adjustment) == gtk_adjustment_get_lower (priv->adjustment) &&
GTK_IS_SCALE (range))
gtk_widget_hide (priv->slider_widget);
else
gtk_widget_show (priv->slider_widget);
gtk_widget_queue_allocate (priv->trough_widget);
/* 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_widget_queue_allocate (priv->trough_widget);
}
static void
apply_marks (GtkRange *range,
gdouble oldval,
gdouble *newval)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gint i;
gdouble 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);
gdouble 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);
gdouble 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);
gdouble 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);
gdouble 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);
gdouble 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);
gdouble 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,
gdouble 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;
double x, y;
gint i;
for (i = 0; i < priv->n_marks; i++)
{
gtk_range_compute_slider_position (range, priv->marks[i], &slider);
gtk_widget_translate_coordinates (priv->trough_widget, GTK_WIDGET (range),
slider.x, slider.y, &x, &y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
priv->mark_pos[i] = x + slider.width / 2;
else
priv->mark_pos[i] = y + slider.height / 2;
}
}
static gboolean
gtk_range_real_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble 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)
{
gdouble power;
gint 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);
g_source_set_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);
g_source_set_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,
gdouble *values,
gint n_values)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gint i;
g_free (priv->marks);
priv->marks = g_new (gdouble, n_values);
g_free (priv->mark_pos);
priv->mark_pos = g_new (gint, n_values);
priv->n_marks = n_values;
for (i = 0; i < n_values; i++)
priv->marks[i] = values[i];
gtk_range_calc_marks (range);
}
gint
_gtk_range_get_stop_positions (GtkRange *range,
gint **values)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gtk_range_calc_marks (range);
if (values)
*values = g_memdup (priv->mark_pos, priv->n_marks * sizeof (gint));
return priv->n_marks;
}
/**
* gtk_range_set_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 #GtkRange::change-value.
*/
void
gtk_range_set_round_digits (GtkRange *range,
gint 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:
* @range: a #GtkRange
*
* Gets the number of digits to round the value to when
* it changes. See #GtkRange::change-value.
*
* Returns: the number of digits to round to
*/
gint
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);
}
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