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gtk2/gtk/gtkrange.c
Timm Bäder 2529464e21 range: Avoid rounding errors when allocating highlight 
Fixes #2438
2020-02-15 17:18:26 +01:00

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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 "gtkeventcontrollerscroll.h"
#include "gtkgesturedrag.h"
#include "gtkgesturelongpressprivate.h"
#include "gtkgestureclick.h"
#include "gtkgizmoprivate.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtkorientableprivate.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtktypebuiltins.h"
#include "gtkeventcontrollerkey.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_destroy (GtkWidget *widget);
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_slider (GtkRange *range);
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_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gtk_widget_snapshot_child (widget, priv->trough_widget, snapshot);
}
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;
widget_class->destroy = gtk_range_destroy;
widget_class->measure = gtk_range_measure;
widget_class->snapshot = gtk_range_snapshot;
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_orientable_set_style_classes (GTK_ORIENTABLE (range));
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_orientable_set_style_classes (GTK_ORIENTABLE (range));
priv->trough_widget = gtk_gizmo_new ("trough",
gtk_range_measure_trough,
gtk_range_allocate_trough,
gtk_range_render_trough,
NULL);
gtk_widget_set_parent (priv->trough_widget, GTK_WIDGET (range));
priv->slider_widget = gtk_gizmo_new ("slider", 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 oppposite 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);
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);
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_destroy (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
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;
}
GTK_WIDGET_CLASS (gtk_range_parent_class)->destroy (widget);
}
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 = MAX (0, coord) / (double) (trough_length);
else
frac = MAX (0, coord) / (double) (trough_length - slider_length);
}
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);
int trough_x, trough_y;
gtk_widget_translate_coordinates (GTK_WIDGET (range), priv->trough_widget,
x, y, &trough_x, &trough_y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
priv->slide_initial_slider_position = MAX (0, priv->slider_x);
priv->slide_initial_coordinate_delta = trough_x - priv->slide_initial_slider_position;
}
else
{
priv->slide_initial_slider_position = MAX (0, priv->slider_y);
priv->slide_initial_coordinate_delta = trough_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;
const 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);
gdk_event_get_state (event, &state_mask);
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 ignore fill and highlight and
* handle them like the trough */
if (mouse_location == priv->fill_widget ||
mouse_location == priv->highlight_widget)
mouse_location = priv->trough_widget;
if (mouse_location == priv->slider_widget &&
gdk_event_triggers_context_menu (event))
{
gboolean handled;
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
g_signal_emit_by_name (widget, "popup-menu", &handled);
return;
}
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)))
{
int 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;
gtk_widget_translate_coordinates (GTK_WIDGET (range), priv->trough_widget,
mouse_x, mouse_y, &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 * (mouse_y - priv->slide_initial_coordinate_delta) - slider_bounds.origin.y) / zoom_divisor;
else
priv->slide_initial_slider_position = (zoom * (mouse_x - priv->slide_initial_coordinate_delta) - slider_bounds.origin.x) / zoom_divisor;
}
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
delta = mouse_y - (priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position);
else
delta = mouse_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);
gtk_range_calc_slider (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.
*/
}
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:
/* Used by CList, range doesn't use it. */
break;
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);
int trough_width, trough_height;
int slider_width, slider_height, min_slider_size;
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);
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)
{
gint y, bottom, top, height;
/* Slider fits into the trough, with stepper_spacing on either side,
* and the size/position based on the adjustment or fixed, depending.
*/
slider_rect->x = (int) floor ((trough_width - slider_width) / 2);
slider_rect->width = slider_width;
min_slider_size = slider_height;
/* Compute slider position/length */
top = 0;
bottom = top + trough_height;
/* slider height is the fraction (page_size /
* total_adjustment_range) times the trough height in pixels
*/
if (upper - lower != 0)
height = (bottom - top) * (page_size / (upper - lower));
else
height = min_slider_size;
if (height < min_slider_size ||
priv->slider_size_fixed)
height = min_slider_size;
height = MIN (height, trough_height);
y = top;
if (upper - lower - page_size != 0)
y += (bottom - top - height) * ((adjustment_value - lower) / (upper - lower - page_size));
y = CLAMP (y, top, bottom);
if (should_invert (range))
y = bottom - (y - top + height);
slider_rect->y = y;
slider_rect->height = height;
}
else
{
gint x, left, right, width;
/* Slider fits into the trough, with stepper_spacing on either side,
* and the size/position based on the adjustment or fixed, depending.
*/
slider_rect->y = (int) floor ((trough_height - slider_height) / 2);
slider_rect->height = slider_height;
min_slider_size = slider_width;
/* Compute slider position/length */
left = 0;
right = left + trough_width;
/* slider width is the fraction (page_size /
* total_adjustment_range) times the trough width in pixels
*/
if (upper - lower != 0)
width = (right - left) * (page_size / (upper - lower));
else
width = min_slider_size;
if (width < min_slider_size ||
priv->slider_size_fixed)
width = min_slider_size;
width = MIN (width, trough_width);
x = left;
if (upper - lower - page_size != 0)
x += (right - left - width) * ((adjustment_value - lower) / (upper - lower - page_size));
x = CLAMP (x, left, right);
if (should_invert (range))
x = right - (x - left + width);
slider_rect->x = x;
slider_rect->width = width;
}
}
static void
gtk_range_calc_slider (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
gboolean visible;
if (GTK_IS_SCALE (range) &&
gtk_adjustment_get_upper (priv->adjustment) == gtk_adjustment_get_lower (priv->adjustment))
visible = FALSE;
else
visible = TRUE;
gtk_widget_set_visible (priv->slider_widget, visible);
gtk_widget_queue_allocate (priv->trough_widget);
}
static void
gtk_range_calc_marks (GtkRange *range)
{
GtkRangePrivate *priv = gtk_range_get_instance_private (range);
GdkRectangle slider;
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, &slider.x, &slider.y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
priv->mark_pos[i] = slider.x + slider.width / 2;
else
priv->mark_pos[i] = slider.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);
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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