AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
953b82a584
gtk2/gtk/gtkrange.c
Matthias Clasen 5b21c7d79f range: Ensure we don't underallocate the highlight gadget 
This was causing warnings in HighContrast.

https://bugzilla.gnome.org/show_bug.cgi?id=770614
2016-09-04 09:43:51 -04:00

4047 lines
125 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

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

/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 2001 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2004. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <stdio.h>
#include <math.h>
#include "gtkrange.h"
#include "gtkrangeprivate.h"
#include "gtkadjustmentprivate.h"
#include "gtkboxgadgetprivate.h"
#include "gtkbuiltiniconprivate.h"
#include "gtkcsscustomgadgetprivate.h"
#include "gtkcolorscaleprivate.h"
#include "gtkintl.h"
#include "gtkgesturelongpressprivate.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkorientableprivate.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtkscrollbar.h"
#include "gtktypebuiltins.h"
#include "gtkwindow.h"
#include "gtkwidgetprivate.h"
#include "a11y/gtkrangeaccessible.h"
#include "gtkcssstylepropertyprivate.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 influencing the sensitivity
* of the “steppers”. It also 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;
struct _GtkRangePrivate
{
GtkCssGadget *mouse_location;
/* last mouse coords we got, or G_MININT if mouse is outside the range */
gint mouse_x;
gint mouse_y;
GtkCssGadget *grab_location; /* "grabbed" mouse location, NULL for no grab */
GtkRangeStepTimer *timer;
GtkAdjustment *adjustment;
GtkSensitivityType lower_sensitivity;
GtkSensitivityType upper_sensitivity;
GdkWindow *event_window;
/* Steppers are: < > ---- < >
* a b c d
*/
GtkCssGadget *gadget;
GtkCssGadget *contents_gadget;
GtkCssGadget *stepper_a_gadget;
GtkCssGadget *stepper_b_gadget;
GtkCssGadget *stepper_c_gadget;
GtkCssGadget *stepper_d_gadget;
GtkCssGadget *trough_gadget;
GtkCssGadget *fill_gadget;
GtkCssGadget *highlight_gadget;
GtkCssGadget *slider_gadget;
GtkOrientation orientation;
gdouble fill_level;
gdouble *marks;
gint *mark_pos;
gint min_slider_size;
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 slider_use_min_size : 1;
guint trough_click_forward : 1; /* trough click was on the forward side of slider */
/* Stepper sensitivity */
guint lower_sensitive : 1;
guint upper_sensitive : 1;
/* The range has an origin, should be drawn differently. Used by GtkScale */
guint has_origin : 1;
/* 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 *long_press_gesture;
GtkGesture *multipress_gesture;
GtkGesture *drag_gesture;
GtkScrollType autoscroll_mode;
guint autoscroll_id;
};
enum {
PROP_0,
PROP_ADJUSTMENT,
PROP_INVERTED,
PROP_LOWER_STEPPER_SENSITIVITY,
PROP_UPPER_STEPPER_SENSITIVITY,
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_get_preferred_width
(GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_range_get_preferred_height
(GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_range_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_range_realize (GtkWidget *widget);
static void gtk_range_unrealize (GtkWidget *widget);
static void gtk_range_map (GtkWidget *widget);
static void gtk_range_unmap (GtkWidget *widget);
static gboolean gtk_range_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk_range_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkRange *range);
static void gtk_range_multipress_gesture_released (GtkGestureMultiPress *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 gboolean gtk_range_scroll_event (GtkWidget *widget,
GdkEventScroll *event);
static gboolean gtk_range_event (GtkWidget *widget,
GdkEvent *event);
static void update_slider_position (GtkRange *range,
gint mouse_x,
gint 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_update_mouse_location (GtkRange *range);
static void gtk_range_calc_slider (GtkRange *range);
static void gtk_range_calc_stepper_sensitivity (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_press (GtkWidget *range,
GdkEventKey *event);
static void gtk_range_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state);
static void gtk_range_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction);
static void gtk_range_measure_trough (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer user_data);
static void gtk_range_allocate_trough (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer data);
static gboolean gtk_range_render_trough (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer user_data);
static void gtk_range_measure (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer user_data);
static void gtk_range_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer data);
static gboolean gtk_range_render (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer user_data);
G_DEFINE_ABSTRACT_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;
widget_class->destroy = gtk_range_destroy;
widget_class->get_preferred_width = gtk_range_get_preferred_width;
widget_class->get_preferred_height = gtk_range_get_preferred_height;
widget_class->size_allocate = gtk_range_size_allocate;
widget_class->realize = gtk_range_realize;
widget_class->unrealize = gtk_range_unrealize;
widget_class->map = gtk_range_map;
widget_class->unmap = gtk_range_unmap;
widget_class->draw = gtk_range_draw;
widget_class->event = gtk_range_event;
widget_class->scroll_event = gtk_range_scroll_event;
widget_class->key_press_event = gtk_range_key_press;
widget_class->state_flags_changed = gtk_range_state_flags_changed;
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.
*
* It is not possible to use delayed update policies in an overridden
* #GtkRange::change-value handler.
*
* Returns: %TRUE to prevent other handlers from being invoked for
* the signal, %FALSE to propagate the signal further
*
* Since: 2.6
*/
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);
properties[PROP_LOWER_STEPPER_SENSITIVITY] =
g_param_spec_enum ("lower-stepper-sensitivity",
P_("Lower stepper sensitivity"),
P_("The sensitivity policy for the stepper that points to the adjustment's lower side"),
GTK_TYPE_SENSITIVITY_TYPE,
GTK_SENSITIVITY_AUTO,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_UPPER_STEPPER_SENSITIVITY] =
g_param_spec_enum ("upper-stepper-sensitivity",
P_("Upper stepper sensitivity"),
P_("The sensitivity policy for the stepper that points to the adjustment's upper side"),
GTK_TYPE_SENSITIVITY_TYPE,
GTK_SENSITIVITY_AUTO,
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().
*
* Since: 2.12
**/
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().
*
* Since: 2.12
**/
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().
*
* Since: 2.12
**/
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.
*
* Since: 2.24
*/
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);
/**
* GtkRange:slider-width:
*
* Width of scrollbar or scale thumb.
*
* Deprecated: 3.20: Use the min-height/min-width CSS properties on the
* slider element. The value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("slider-width",
P_("Slider Width"),
P_("Width of scrollbar or scale thumb"),
0,
G_MAXINT,
14,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkRange:trough-border:
*
* Spacing between thumb/steppers and outer trough bevel.
*
* Deprecated: 3.20: Use the margin/padding CSS properties on the trough and
* stepper elements. The value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("trough-border",
P_("Trough Border"),
P_("Spacing between thumb/steppers and outer trough bevel"),
0,
G_MAXINT,
1,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkRange:stepper-size:
*
* Length of step buttons at ends.
*
* Deprecated: 3.20: Use the min-height/min-width CSS properties on the
* stepper elements. The value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("stepper-size",
P_("Stepper Size"),
P_("Length of step buttons at ends"),
0,
G_MAXINT,
14,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkRange:stepper-spacing:
*
* The spacing between the stepper buttons and thumb. Note that
* stepper-spacing won't have any effect if there are no steppers.
*
* Deprecated: 3.20: Use the margin CSS property on the stepper elements.
* The value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("stepper-spacing",
P_("Stepper Spacing"),
P_("Spacing between step buttons and thumb"),
0,
G_MAXINT,
0,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkRange:arrow-displacement-x:
*
* How far in the x direction to move the arrow when the button is depressed.
*
* Deprecated: 3.20: The value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("arrow-displacement-x",
P_("Arrow X Displacement"),
P_("How far in the x direction to move the arrow when the button is depressed"),
G_MININT,
G_MAXINT,
0,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkRange:arrow-displacement-y:
*
* How far in the y direction to move the arrow when the button is depressed.
*
* Deprecated: 3.20: The value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("arrow-displacement-y",
P_("Arrow Y Displacement"),
P_("How far in the y direction to move the arrow when the button is depressed"),
G_MININT,
G_MAXINT,
0,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkRange:trough-under-steppers:
*
* Whether to draw the trough across the full length of the range or
* to exclude the steppers and their spacing.
*
* Since: 2.10
*
* Deprecated: 3.20: The value of this style property is ignored, and the
* widget will behave as if it was set to %TRUE.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boolean ("trough-under-steppers",
P_("Trough Under Steppers"),
P_("Whether to draw trough for full length of range or exclude the steppers and spacing"),
TRUE,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkRange:arrow-scaling:
*
* The arrow size proportion relative to the scroll button size.
*
* Since: 2.14
*
* Deprecated: 3.20: Use min-width/min-height on the "button" node instead.
* The value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_float ("arrow-scaling",
P_("Arrow scaling"),
P_("Arrow scaling with regard to scroll button size"),
0.0, 1.0, 0.5,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_RANGE_ACCESSIBLE);
}
static void
gtk_range_sync_orientation (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GtkOrientation orientation;
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (range));
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (range));
gtk_box_gadget_set_orientation (GTK_BOX_GADGET (priv->contents_gadget), orientation);
}
static void
gtk_range_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkRange *range = GTK_RANGE (object);
GtkRangePrivate *priv = range->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
if (priv->orientation != g_value_get_enum (value))
{
priv->orientation = g_value_get_enum (value);
gtk_range_sync_orientation (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_LOWER_STEPPER_SENSITIVITY:
gtk_range_set_lower_stepper_sensitivity (range, g_value_get_enum (value));
break;
case PROP_UPPER_STEPPER_SENSITIVITY:
gtk_range_set_upper_stepper_sensitivity (range, g_value_get_enum (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 = range->priv;
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_LOWER_STEPPER_SENSITIVITY:
g_value_set_enum (value, gtk_range_get_lower_stepper_sensitivity (range));
break;
case PROP_UPPER_STEPPER_SENSITIVITY:
g_value_set_enum (value, gtk_range_get_upper_stepper_sensitivity (range));
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;
GtkCssNode *widget_node;
range->priv = gtk_range_get_instance_private (range);
priv = range->priv;
gtk_widget_set_has_window (GTK_WIDGET (range), FALSE);
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->adjustment = NULL;
priv->inverted = FALSE;
priv->flippable = FALSE;
priv->min_slider_size = 1;
priv->round_digits = -1;
priv->mouse_x = G_MININT;
priv->mouse_y = G_MININT;
priv->lower_sensitivity = GTK_SENSITIVITY_AUTO;
priv->upper_sensitivity = GTK_SENSITIVITY_AUTO;
priv->lower_sensitive = TRUE;
priv->upper_sensitive = TRUE;
priv->has_origin = FALSE;
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));
widget_node = gtk_widget_get_css_node (GTK_WIDGET (range));
priv->gadget = gtk_css_custom_gadget_new_for_node (widget_node,
GTK_WIDGET (range),
gtk_range_measure,
gtk_range_allocate,
gtk_range_render,
NULL, NULL);
priv->contents_gadget = gtk_box_gadget_new ("contents",
GTK_WIDGET (range),
priv->gadget, NULL);
priv->trough_gadget = gtk_css_custom_gadget_new ("trough",
GTK_WIDGET (range),
NULL, NULL,
gtk_range_measure_trough,
gtk_range_allocate_trough,
gtk_range_render_trough,
NULL, NULL);
gtk_css_gadget_set_state (priv->trough_gadget,
gtk_css_node_get_state (widget_node));
gtk_box_gadget_insert_gadget (GTK_BOX_GADGET (priv->contents_gadget), -1, priv->trough_gadget,
TRUE, GTK_ALIGN_CENTER);
priv->slider_gadget = gtk_builtin_icon_new ("slider",
GTK_WIDGET (range),
priv->trough_gadget, NULL);
gtk_css_gadget_set_state (priv->slider_gadget,
gtk_css_node_get_state (widget_node));
/* Note: Order is important here.
* The ::drag-begin handler relies on the state set up by the
* multipress ::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_WIDGET (range));
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);
priv->multipress_gesture = gtk_gesture_multi_press_new (GTK_WIDGET (range));
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->multipress_gesture), 0);
gtk_gesture_group (priv->drag_gesture, priv->multipress_gesture);
g_signal_connect (priv->multipress_gesture, "pressed",
G_CALLBACK (gtk_range_multipress_gesture_pressed), range);
g_signal_connect (priv->multipress_gesture, "released",
G_CALLBACK (gtk_range_multipress_gesture_released), range);
priv->long_press_gesture = gtk_gesture_long_press_new (GTK_WIDGET (range));
g_object_set (priv->long_press_gesture, "delay-factor", 2.0, NULL);
gtk_gesture_group (priv->drag_gesture, priv->long_press_gesture);
g_signal_connect (priv->long_press_gesture, "pressed",
G_CALLBACK (gtk_range_long_press_gesture_pressed), range);
}
/**
* 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;
g_return_val_if_fail (GTK_IS_RANGE (range), NULL);
priv = range->priv;
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;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
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);
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_ADJUSTMENT]);
}
}
static gboolean
should_invert (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
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 void
update_highlight_position (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
if (!priv->highlight_gadget)
return;
if (should_invert (range))
{
gtk_css_gadget_remove_class (priv->highlight_gadget, GTK_STYLE_CLASS_TOP);
gtk_css_gadget_add_class (priv->highlight_gadget, GTK_STYLE_CLASS_BOTTOM);
}
else
{
gtk_css_gadget_remove_class (priv->highlight_gadget, GTK_STYLE_CLASS_BOTTOM);
gtk_css_gadget_add_class (priv->highlight_gadget, GTK_STYLE_CLASS_TOP);
}
}
static void
update_fill_position (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
if (!priv->fill_gadget)
return;
if (should_invert (range))
{
gtk_css_gadget_remove_class (priv->fill_gadget, GTK_STYLE_CLASS_TOP);
gtk_css_gadget_add_class (priv->fill_gadget, GTK_STYLE_CLASS_BOTTOM);
}
else
{
gtk_css_gadget_remove_class (priv->fill_gadget, GTK_STYLE_CLASS_BOTTOM);
gtk_css_gadget_add_class (priv->fill_gadget, GTK_STYLE_CLASS_TOP);
}
}
static void
update_stepper_state (GtkRange *range,
GtkCssGadget *gadget)
{
GtkRangePrivate *priv = range->priv;
GtkStateFlags state;
gboolean arrow_sensitive;
state = gtk_widget_get_state_flags (GTK_WIDGET (range));
if ((!priv->inverted &&
(gadget == priv->stepper_a_gadget || gadget == priv->stepper_c_gadget)) ||
(priv->inverted &&
(gadget == priv->stepper_b_gadget || gadget == priv->stepper_d_gadget)))
arrow_sensitive = priv->lower_sensitive;
else
arrow_sensitive = priv->upper_sensitive;
state &= ~(GTK_STATE_FLAG_ACTIVE | GTK_STATE_FLAG_PRELIGHT);
if ((state & GTK_STATE_FLAG_INSENSITIVE) || !arrow_sensitive)
{
state |= GTK_STATE_FLAG_INSENSITIVE;
}
else
{
if (priv->grab_location == gadget)
state |= GTK_STATE_FLAG_ACTIVE;
if (priv->mouse_location == gadget)
state |= GTK_STATE_FLAG_PRELIGHT;
}
gtk_css_gadget_set_state (gadget, state);
}
static void
update_steppers_state (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
if (priv->stepper_a_gadget)
update_stepper_state (range, priv->stepper_a_gadget);
if (priv->stepper_b_gadget)
update_stepper_state (range, priv->stepper_b_gadget);
if (priv->stepper_c_gadget)
update_stepper_state (range, priv->stepper_c_gadget);
if (priv->stepper_d_gadget)
update_stepper_state (range, priv->stepper_d_gadget);
}
/**
* 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;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
setting = setting != FALSE;
if (setting != priv->inverted)
{
priv->inverted = setting;
update_steppers_state (range);
update_fill_position (range);
update_highlight_position (range);
gtk_widget_queue_resize (GTK_WIDGET (range));
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)
{
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return range->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().
*
* Since: 2.18
**/
void
gtk_range_set_flippable (GtkRange *range,
gboolean flippable)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
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
*
* Since: 2.18
**/
gboolean
gtk_range_get_flippable (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return range->priv->flippable;
}
void
gtk_range_set_slider_use_min_size (GtkRange *range,
gboolean use_min_size)
{
GtkRangePrivate *priv = range->priv;
if (use_min_size != priv->slider_use_min_size)
{
priv->slider_use_min_size = use_min_size;
gtk_css_gadget_queue_resize (priv->slider_gadget);
}
}
/**
* 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.
*
* Since: 2.20
**/
void
gtk_range_set_slider_size_fixed (GtkRange *range,
gboolean size_fixed)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
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_css_gadget_queue_allocate (priv->slider_gadget);
}
}
/**
* 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.
*
* Since: 2.20
**/
gboolean
gtk_range_get_slider_size_fixed (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return range->priv->slider_size_fixed;
}
/**
* gtk_range_set_min_slider_size:
* @range: a #GtkRange
* @min_size: The slider’s minimum size
*
* Sets the minimum size of the range’s slider.
*
* This function is useful mainly for #GtkRange subclasses.
*
* Since: 2.20
*
* Deprecated: 3.20: Use the min-height/min-width CSS properties on the slider
* node.
**/
void
gtk_range_set_min_slider_size (GtkRange *range,
gint min_size)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (min_size > 0);
priv = range->priv;
if (min_size != priv->min_slider_size)
{
priv->min_slider_size = min_size;
gtk_widget_queue_resize (GTK_WIDGET (range));
}
}
/**
* gtk_range_get_min_slider_size:
* @range: a #GtkRange
*
* This function is useful mainly for #GtkRange subclasses.
*
* See gtk_range_set_min_slider_size().
*
* Returns: The minimum size of the range’s slider.
*
* Since: 2.20
*
* Deprecated: 3.20: Use the min-height/min-width CSS properties on the slider
* node.
**/
gint
gtk_range_get_min_slider_size (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return range->priv->min_slider_size;
}
static void
measure_one_gadget (GtkCssGadget *gadget,
int *width_out,
int *height_out)
{
gtk_css_gadget_get_preferred_size (gadget,
GTK_ORIENTATION_HORIZONTAL, -1,
width_out, NULL,
NULL, NULL);
gtk_css_gadget_get_preferred_size (gadget,
GTK_ORIENTATION_VERTICAL, -1,
height_out, NULL,
NULL, NULL);
}
/**
* 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
* and its steppers, in widget->window coordinates.
*
* This function is useful mainly for #GtkRange subclasses.
*
* Since: 2.20
**/
void
gtk_range_get_range_rect (GtkRange *range,
GdkRectangle *range_rect)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (range_rect != NULL);
priv = range->priv;
gtk_css_gadget_get_margin_box (priv->contents_gadget, range_rect);
}
/**
* 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.
*
* Since: 2.20
**/
void
gtk_range_get_slider_range (GtkRange *range,
gint *slider_start,
gint *slider_end)
{
GtkRangePrivate *priv;
GtkAllocation slider_alloc;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
if (slider_start)
*slider_start = slider_alloc.y;
if (slider_end)
*slider_end = slider_alloc.y + slider_alloc.height;
}
else
{
if (slider_start)
*slider_start = slider_alloc.x;
if (slider_end)
*slider_end = slider_alloc.x + slider_alloc.width;
}
}
/**
* gtk_range_set_lower_stepper_sensitivity:
* @range: a #GtkRange
* @sensitivity: the lower stepper’s sensitivity policy.
*
* Sets the sensitivity policy for the stepper that points to the
* 'lower' end of the GtkRange’s adjustment.
*
* Since: 2.10
**/
void
gtk_range_set_lower_stepper_sensitivity (GtkRange *range,
GtkSensitivityType sensitivity)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
if (priv->lower_sensitivity != sensitivity)
{
priv->lower_sensitivity = sensitivity;
gtk_range_calc_stepper_sensitivity (range);
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_LOWER_STEPPER_SENSITIVITY]);
}
}
/**
* gtk_range_get_lower_stepper_sensitivity:
* @range: a #GtkRange
*
* Gets the sensitivity policy for the stepper that points to the
* 'lower' end of the GtkRange’s adjustment.
*
* Returns: The lower stepper’s sensitivity policy.
*
* Since: 2.10
**/
GtkSensitivityType
gtk_range_get_lower_stepper_sensitivity (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
return range->priv->lower_sensitivity;
}
/**
* gtk_range_set_upper_stepper_sensitivity:
* @range: a #GtkRange
* @sensitivity: the upper stepper’s sensitivity policy.
*
* Sets the sensitivity policy for the stepper that points to the
* 'upper' end of the GtkRange’s adjustment.
*
* Since: 2.10
**/
void
gtk_range_set_upper_stepper_sensitivity (GtkRange *range,
GtkSensitivityType sensitivity)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
if (priv->upper_sensitivity != sensitivity)
{
priv->upper_sensitivity = sensitivity;
gtk_range_calc_stepper_sensitivity (range);
g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_UPPER_STEPPER_SENSITIVITY]);
}
}
/**
* gtk_range_get_upper_stepper_sensitivity:
* @range: a #GtkRange
*
* Gets the sensitivity policy for the stepper that points to the
* 'upper' end of the GtkRange’s adjustment.
*
* Returns: The upper stepper’s sensitivity policy.
*
* Since: 2.10
**/
GtkSensitivityType
gtk_range_get_upper_stepper_sensitivity (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), GTK_SENSITIVITY_AUTO);
return range->priv->upper_sensitivity;
}
/**
* 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)
{
GtkAdjustment *adjustment;
g_return_if_fail (GTK_IS_RANGE (range));
adjustment = range->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;
GtkAdjustment *adjustment;
gdouble value;
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (min <= max);
priv = range->priv;
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;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
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)
{
g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
return gtk_adjustment_get_value (range->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.
*
* Since: 2.12
**/
void
gtk_range_set_show_fill_level (GtkRange *range,
gboolean show_fill_level)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
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_gadget = gtk_css_custom_gadget_new ("fill",
GTK_WIDGET (range),
priv->trough_gadget, NULL,
NULL, NULL, NULL,
NULL, NULL);
gtk_css_gadget_set_state (priv->fill_gadget,
gtk_css_node_get_state (gtk_css_gadget_get_node (priv->trough_gadget)));
update_fill_position (range);
}
else
{
gtk_css_node_set_parent (gtk_css_gadget_get_node (priv->fill_gadget), NULL);
g_clear_object (&priv->fill_gadget);
}
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.
*
* Since: 2.12
**/
gboolean
gtk_range_get_show_fill_level (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return range->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.
*
* Since: 2.12
**/
void
gtk_range_set_restrict_to_fill_level (GtkRange *range,
gboolean restrict_to_fill_level)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
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.
*
* Since: 2.12
**/
gboolean
gtk_range_get_restrict_to_fill_level (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return range->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.
*
* Since: 2.12
**/
void
gtk_range_set_fill_level (GtkRange *range,
gdouble fill_level)
{
GtkRangePrivate *priv;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
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
*
* Since: 2.12
**/
gdouble
gtk_range_get_fill_level (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
return range->priv->fill_level;
}
static void
gtk_range_destroy (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
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 = range->priv;
g_clear_object (&priv->drag_gesture);
g_clear_object (&priv->multipress_gesture);
g_clear_object (&priv->long_press_gesture);
g_clear_object (&priv->gadget);
g_clear_object (&priv->contents_gadget);
g_clear_object (&priv->trough_gadget);
g_clear_object (&priv->fill_gadget);
g_clear_object (&priv->highlight_gadget);
g_clear_object (&priv->slider_gadget);
g_clear_object (&priv->stepper_a_gadget);
g_clear_object (&priv->stepper_b_gadget);
g_clear_object (&priv->stepper_c_gadget);
g_clear_object (&priv->stepper_d_gadget);
G_OBJECT_CLASS (gtk_range_parent_class)->finalize (object);
}
static void
gtk_range_measure_trough (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer user_data)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gint min, nat;
gtk_css_gadget_get_preferred_size (priv->slider_gadget,
orientation, -1,
minimum, natural,
NULL, NULL);
if (priv->fill_gadget)
{
gtk_css_gadget_get_preferred_size (priv->fill_gadget,
orientation, for_size,
&min, &nat,
NULL, NULL);
*minimum = MAX (*minimum, min);
*natural = MAX (*natural, nat);
}
if (priv->highlight_gadget)
{
gtk_css_gadget_get_preferred_size (priv->highlight_gadget,
orientation, for_size,
&min, &nat,
NULL, NULL);
*minimum = MAX (*minimum, min);
*natural = MAX (*natural, nat);
}
}
static void
gtk_range_measure (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer user_data)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
GtkBorder border = { 0 };
/* Measure the main box */
gtk_css_gadget_get_preferred_size (priv->contents_gadget,
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_size_request (GtkWidget *widget,
GtkOrientation orientation,
gint *minimum,
gint *natural)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gtk_css_gadget_get_preferred_size (priv->gadget, orientation, -1,
minimum, natural,
NULL, NULL);
if (GTK_RANGE_GET_CLASS (range)->get_range_size_request)
{
gint min, nat;
GTK_RANGE_GET_CLASS (range)->get_range_size_request (range, orientation,
&min, &nat);
*minimum = MAX (*minimum, min);
*natural = MAX (*natural, nat);
}
}
static void
gtk_range_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_range_size_request (widget, GTK_ORIENTATION_HORIZONTAL,
minimum, natural);
}
static void
gtk_range_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_range_size_request (widget, GTK_ORIENTATION_VERTICAL,
minimum, natural);
}
static void
gtk_range_allocate_trough (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer data)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
GtkAllocation slider_alloc, widget_alloc;
/* Slider */
gtk_range_calc_marks (range);
gtk_range_calc_stepper_sensitivity (range);
gtk_widget_get_allocation (widget, &widget_alloc);
gtk_range_compute_slider_position (range,
gtk_adjustment_get_value (priv->adjustment),
&slider_alloc);
slider_alloc.x += widget_alloc.x;
slider_alloc.y += widget_alloc.y;
gtk_css_gadget_allocate (priv->slider_gadget,
&slider_alloc,
gtk_widget_get_allocated_baseline (widget),
out_clip);
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)
{
gdouble level, fill;
GtkAllocation fill_alloc, fill_clip;
fill_alloc = *allocation;
level = CLAMP (priv->fill_level,
gtk_adjustment_get_lower (priv->adjustment),
gtk_adjustment_get_upper (priv->adjustment) -
gtk_adjustment_get_page_size (priv->adjustment));
fill = (level - gtk_adjustment_get_lower (priv->adjustment)) /
(gtk_adjustment_get_upper (priv->adjustment) -
gtk_adjustment_get_lower (priv->adjustment) -
gtk_adjustment_get_page_size (priv->adjustment));
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
fill_alloc.width *= fill;
if (should_invert (range))
fill_alloc.x += allocation->width - fill_alloc.width;
}
else
{
fill_alloc.height *= fill;
if (should_invert (range))
fill_alloc.y += allocation->height - fill_alloc.height;
}
gtk_css_gadget_allocate (priv->fill_gadget,
&fill_alloc,
baseline,
&fill_clip);
gdk_rectangle_union (out_clip, &fill_clip, out_clip);
}
if (priv->has_origin)
{
GtkAllocation highlight_alloc, highlight_clip;
int min, nat;
gtk_css_gadget_get_preferred_size (priv->highlight_gadget,
priv->orientation, -1,
&min, &nat,
NULL, NULL);
highlight_alloc = *allocation;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
int x = slider_alloc.x + slider_alloc.width / 2;
if (!should_invert (range))
{
highlight_alloc.x = allocation->x;
highlight_alloc.width = MAX (x - allocation->x, min);
}
else
{
highlight_alloc.width = MAX (allocation->x + allocation->width - x, min);
highlight_alloc.x = allocation->x + allocation->width - highlight_alloc.width;
}
}
else
{
int y = slider_alloc.y + slider_alloc.height / 2;
if (!should_invert (range))
{
highlight_alloc.y = allocation->y;
highlight_alloc.height = MAX (y - allocation->y, min);
}
else
{
highlight_alloc.height = MAX (allocation->y + allocation->height - y, min);
highlight_alloc.y = allocation->y + allocation->height - highlight_alloc.height;
}
}
gtk_css_gadget_allocate (priv->highlight_gadget,
&highlight_alloc,
baseline,
&highlight_clip);
gdk_rectangle_union (out_clip, &highlight_clip, out_clip);
}
}
/* 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 (const GtkAllocation *allocation,
int *width,
int *height,
GtkBorder *border,
gboolean border_expands_horizontally)
{
gint extra, shortage;
/* Width */
extra = allocation->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 - allocation->width;
if (shortage > 0)
{
*width = allocation->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 - allocation->width;
if (shortage > 0)
{
/* Shrink borders */
border->left -= shortage / 2;
border->right -= shortage / 2 + shortage % 2;
}
}
/* Height */
extra = allocation->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 - allocation->height;
if (shortage > 0)
{
*height = allocation->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 - allocation->height;
if (shortage > 0)
{
/* Shrink borders */
border->top -= shortage / 2;
border->bottom -= shortage / 2 + shortage % 2;
}
}
}
static void
gtk_range_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer data)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
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);
measure_one_gadget (priv->contents_gadget, &box_min_width, &box_min_height);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
clamp_dimensions (allocation, &box_min_width, &box_min_height, &border, TRUE);
else
clamp_dimensions (allocation, &box_min_width, &box_min_height, &border, FALSE);
box_alloc.x = border.left + allocation->x;
box_alloc.y = border.top + allocation->y;
box_alloc.width = box_min_width;
box_alloc.height = box_min_height;
gtk_css_gadget_allocate (priv->contents_gadget,
&box_alloc,
baseline,
out_clip);
/* TODO: we should compute a proper clip from get_range_border(),
* but this will at least give us outset shadows.
*/
gdk_rectangle_union (out_clip, allocation, out_clip);
}
static void
gtk_range_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
GtkAllocation clip;
gtk_widget_set_allocation (widget, allocation);
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (priv->event_window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gtk_css_gadget_allocate (priv->gadget,
allocation,
gtk_widget_get_allocated_baseline (widget),
&clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_range_realize (GtkWidget *widget)
{
GtkAllocation allocation;
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
GdkWindow *window;
GdkWindowAttr attributes;
gint attributes_mask;
gtk_widget_set_realized (widget, TRUE);
window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, window);
g_object_ref (window);
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_ONLY;
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_SCROLL_MASK |
GDK_SMOOTH_SCROLL_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_POINTER_MOTION_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y;
priv->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_register_window (widget, priv->event_window);
}
static void
gtk_range_unrealize (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gtk_range_remove_step_timer (range);
gtk_widget_unregister_window (widget, priv->event_window);
gdk_window_destroy (priv->event_window);
priv->event_window = NULL;
GTK_WIDGET_CLASS (gtk_range_parent_class)->unrealize (widget);
}
static void
gtk_range_map (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gdk_window_show (priv->event_window);
GTK_WIDGET_CLASS (gtk_range_parent_class)->map (widget);
}
static void
gtk_range_unmap (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
stop_scrolling (range);
gdk_window_hide (priv->event_window);
GTK_WIDGET_CLASS (gtk_range_parent_class)->unmap (widget);
}
static void
update_slider_state (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GtkStateFlags state;
state = gtk_widget_get_state_flags (GTK_WIDGET (range));
state &= ~(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_ACTIVE);
if (priv->mouse_location == priv->slider_gadget &&
!(state & GTK_STATE_FLAG_INSENSITIVE))
state |= GTK_STATE_FLAG_PRELIGHT;
if (priv->grab_location == priv->slider_gadget)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_css_gadget_set_state (priv->slider_gadget, state);
}
static void
update_trough_state (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GtkStateFlags state;
state = gtk_widget_get_state_flags (GTK_WIDGET (range));
state &= ~(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_ACTIVE);
gtk_css_gadget_set_state (priv->contents_gadget, state);
if (priv->mouse_location == priv->trough_gadget &&
!(state & GTK_STATE_FLAG_INSENSITIVE))
state |= GTK_STATE_FLAG_PRELIGHT;
if (priv->grab_location == priv->trough_gadget)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_css_gadget_set_state (priv->trough_gadget, state);
if (priv->highlight_gadget)
gtk_css_gadget_set_state (priv->highlight_gadget, state);
if (priv->fill_gadget)
gtk_css_gadget_set_state (priv->fill_gadget, state);
}
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_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state)
{
GtkRange *range = GTK_RANGE (widget);
update_trough_state (range);
update_slider_state (range);
update_steppers_state (range);
GTK_WIDGET_CLASS (gtk_range_parent_class)->state_flags_changed (widget, previous_state);
}
static gboolean
gtk_range_render_trough (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer user_data)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
/* HACK: GtkColorScale wants to draw its own trough
* so we let it...
*/
if (GTK_IS_COLOR_SCALE (widget))
gtk_color_scale_draw_trough (GTK_COLOR_SCALE (widget), cr, x, y, width, height);
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_css_gadget_draw (priv->fill_gadget, cr);
if (priv->has_origin)
gtk_css_gadget_draw (priv->highlight_gadget, cr);
return gtk_widget_has_visible_focus (widget);
}
static gboolean
gtk_range_render (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer user_data)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gtk_css_gadget_draw (priv->contents_gadget, cr);
/* Draw the slider last, so that e.g. the focus ring stays below it */
gtk_css_gadget_draw (priv->slider_gadget, cr);
return FALSE;
}
static gboolean
gtk_range_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gtk_css_gadget_draw (priv->gadget, cr);
return GDK_EVENT_PROPAGATE;
}
static void
range_grab_add (GtkRange *range,
GtkCssGadget *location)
{
GtkRangePrivate *priv = range->priv;
GtkStyleContext *context;
context = gtk_widget_get_style_context (GTK_WIDGET (range));
/* Don't perform any GDK/GTK+ grab here. Since a button
* is down, there's an ongoing implicit grab on
* priv->event_window, which pretty much guarantees this
* is the only widget receiving the pointer events.
*/
priv->grab_location = location;
gtk_css_gadget_queue_allocate (location);
update_trough_state (range);
update_slider_state (range);
update_steppers_state (range);
gtk_style_context_add_class (context, "dragging");
}
static void
update_zoom_state (GtkRange *range,
gboolean enabled)
{
GtkStyleContext *context;
context = gtk_widget_get_style_context (GTK_WIDGET (range));
if (enabled)
gtk_style_context_add_class (context, "fine-tune");
else
gtk_style_context_remove_class (context, "fine-tune");
range->priv->zoom = enabled;
}
static void
range_grab_remove (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GtkStyleContext *context;
if (!priv->grab_location)
return;
context = gtk_widget_get_style_context (GTK_WIDGET (range));
gtk_css_gadget_queue_allocate (priv->grab_location);
priv->grab_location = NULL;
gtk_range_update_mouse_location (range);
update_slider_state (range);
update_steppers_state (range);
update_zoom_state (range, FALSE);
gtk_style_context_remove_class (context, "dragging");
}
static GtkScrollType
range_get_scroll_for_grab (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
guint grab_button;
gboolean invert;
invert = should_invert (range);
grab_button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (range->priv->multipress_gesture));
if (!priv->grab_location)
return GTK_SCROLL_NONE;
/* Backward stepper */
if (priv->grab_location == priv->stepper_a_gadget ||
priv->grab_location == priv->stepper_c_gadget)
{
switch (grab_button)
{
case GDK_BUTTON_PRIMARY:
return invert ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD;
break;
case GDK_BUTTON_SECONDARY:
return invert ? GTK_SCROLL_PAGE_FORWARD : GTK_SCROLL_PAGE_BACKWARD;
break;
case GDK_BUTTON_MIDDLE:
return invert ? GTK_SCROLL_END : GTK_SCROLL_START;
break;
default:
return GTK_SCROLL_NONE;
}
}
/* Forward stepper */
if (priv->grab_location == priv->stepper_b_gadget ||
priv->grab_location == priv->stepper_d_gadget)
{
switch (grab_button)
{
case GDK_BUTTON_PRIMARY:
return invert ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD;
break;
case GDK_BUTTON_SECONDARY:
return invert ? GTK_SCROLL_PAGE_BACKWARD : GTK_SCROLL_PAGE_FORWARD;
break;
case GDK_BUTTON_MIDDLE:
return invert ? GTK_SCROLL_START : GTK_SCROLL_END;
break;
default:
return GTK_SCROLL_NONE;
}
}
/* In the trough */
if (priv->grab_location == priv->trough_gadget)
{
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 = range->priv;
gdouble frac;
gdouble value;
gint trough_length;
gint trough_start;
gint slider_length;
GtkAllocation slider_alloc, trough_alloc;
gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
gtk_css_gadget_get_content_box (priv->trough_gadget, &trough_alloc);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
trough_length = trough_alloc.height;
trough_start = trough_alloc.y;
slider_length = slider_alloc.height;
}
else
{
trough_length = trough_alloc.width;
trough_start = trough_alloc.x;
slider_length = slider_alloc.width;
}
if (trough_length == slider_length)
frac = 1.0;
else
frac = (MAX (0, coord - trough_start) /
(gdouble) (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_press (GtkWidget *widget,
GdkEventKey *event)
{
GdkDevice *device;
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
device = gdk_event_get_device ((GdkEvent *) event);
device = gdk_device_get_associated_device (device);
if (gtk_gesture_is_active (priv->drag_gesture) &&
device == gtk_gesture_get_device (priv->drag_gesture) &&
event->keyval == GDK_KEY_Escape &&
priv->grab_location != NULL)
{
stop_scrolling (range);
return GDK_EVENT_STOP;
}
else if (priv->in_drag &&
(event->keyval == GDK_KEY_Shift_L ||
event->keyval == GDK_KEY_Shift_R))
{
GtkAllocation slider_alloc;
gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
priv->slide_initial_slider_position = slider_alloc.y;
else
priv->slide_initial_slider_position = slider_alloc.x;
update_zoom_state (range, !priv->zoom);
return GDK_EVENT_STOP;
}
return GTK_WIDGET_CLASS (gtk_range_parent_class)->key_press_event (widget, event);
}
static void
update_initial_slider_position (GtkRange *range,
gdouble x,
gdouble y,
GtkAllocation *slider_alloc)
{
GtkRangePrivate *priv = range->priv;
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
priv->slide_initial_slider_position = MAX (0, slider_alloc->y);
priv->slide_initial_coordinate_delta = y - priv->slide_initial_slider_position;
}
else
{
priv->slide_initial_slider_position = MAX (0, slider_alloc->x);
priv->slide_initial_coordinate_delta = x - priv->slide_initial_slider_position;
}
}
static void
gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture,
gdouble x,
gdouble y,
GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
gtk_range_update_mouse_location (range);
if (priv->mouse_location == priv->slider_gadget && !priv->zoom)
{
GtkAllocation slider_alloc;
gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
update_initial_slider_position (range, x, y, &slider_alloc);
update_zoom_state (range, TRUE);
}
}
static void
gtk_range_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkRange *range)
{
GtkWidget *widget = GTK_WIDGET (range);
GtkRangePrivate *priv = range->priv;
GdkDevice *source_device;
GdkEventSequence *sequence;
const GdkEvent *event;
GdkInputSource source;
gboolean primary_warps;
gboolean shift_pressed;
guint button;
GdkModifierType state_mask;
GtkAllocation slider_alloc;
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);
priv->mouse_x = x;
priv->mouse_y = y;
gtk_range_update_mouse_location (range);
gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
g_object_get (gtk_widget_get_settings (widget),
"gtk-primary-button-warps-slider", &primary_warps,
NULL);
if (priv->mouse_location == priv->slider_gadget &&
gdk_event_triggers_context_menu (event))
{
gboolean handled;
gtk_gesture_set_state (priv->multipress_gesture, GTK_EVENT_SEQUENCE_CLAIMED);
g_signal_emit_by_name (widget, "popup-menu", &handled);
return;
}
if (priv->mouse_location == priv->slider_gadget)
{
/* Shift-click in the slider = fine adjustment */
if (shift_pressed)
update_zoom_state (range, TRUE);
update_initial_slider_position (range, x, y, &slider_alloc);
range_grab_add (range, priv->slider_gadget);
gtk_widget_queue_draw (widget);
}
else if (priv->mouse_location == priv->stepper_a_gadget ||
priv->mouse_location == priv->stepper_b_gadget ||
priv->mouse_location == priv->stepper_c_gadget ||
priv->mouse_location == priv->stepper_d_gadget)
{
GtkScrollType scroll;
range_grab_add (range, priv->mouse_location);
scroll = range_get_scroll_for_grab (range);
if (scroll == GTK_SCROLL_START || scroll == GTK_SCROLL_END)
gtk_range_scroll (range, scroll);
else if (scroll != GTK_SCROLL_NONE)
{
remove_autoscroll (range);
range->priv->autoscroll_mode = scroll;
add_autoscroll (range);
}
}
else if (priv->mouse_location == priv->trough_gadget &&
(source == GDK_SOURCE_TOUCHSCREEN ||
(button == GDK_BUTTON_PRIMARY &&
((primary_warps && !shift_pressed) ||
(!primary_warps && shift_pressed)))))
{
/* warp to location */
GdkRectangle slider;
gdouble slider_low_value, slider_high_value, new_value;
slider_high_value =
coord_to_value (range,
priv->orientation == GTK_ORIENTATION_VERTICAL ?
y : x);
slider_low_value =
coord_to_value (range,
priv->orientation == GTK_ORIENTATION_VERTICAL ?
y - slider_alloc.height :
x - slider_alloc.width);
/* compute new value for warped slider */
new_value = (slider_low_value + slider_high_value) / 2;
gtk_range_compute_slider_position (range, new_value, &slider);
update_initial_slider_position (range, x, y, &slider);
range_grab_add (range, priv->slider_gadget);
gtk_widget_queue_draw (widget);
update_slider_position (range, x, y);
}
else if (priv->mouse_location == priv->trough_gadget &&
button == GDK_BUTTON_PRIMARY &&
((primary_warps && shift_pressed) ||
(!primary_warps && !shift_pressed)))
{
/* 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_gadget);
scroll = range_get_scroll_for_grab (range);
gtk_range_add_step_timer (range, scroll);
}
else if (priv->mouse_location == priv->trough_gadget &&
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_gadget);
remove_autoscroll (range);
range->priv->autoscroll_mode = priv->trough_click_forward ? GTK_SCROLL_END : GTK_SCROLL_START;
add_autoscroll (range);
}
if (priv->grab_location == priv->slider_gadget);
/* leave it to ::drag-begin to claim the sequence */
else if (priv->grab_location != NULL)
gtk_gesture_set_state (priv->multipress_gesture, GTK_EVENT_SEQUENCE_CLAIMED);
}
static void
gtk_range_multipress_gesture_released (GtkGestureMultiPress *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
priv->mouse_x = x;
priv->mouse_y = y;
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 = range->priv;
gdouble delta;
gdouble c;
gdouble new_value;
gboolean handled;
gdouble next_value;
gdouble mark_value;
gdouble mark_delta;
gdouble zoom;
gint i;
if (priv->zoom)
{
GtkAllocation trough_alloc;
gtk_css_gadget_get_margin_box (priv->trough_gadget, &trough_alloc);
zoom = MIN(1.0, (priv->orientation == GTK_ORIENTATION_VERTICAL ?
trough_alloc.height : trough_alloc.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)
{
GtkAllocation slider_alloc;
gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
priv->slide_initial_slider_position = (zoom * (mouse_y - priv->slide_initial_coordinate_delta) - slider_alloc.y) / (zoom - 1.0);
else
priv->slide_initial_slider_position = (zoom * (mouse_x - priv->slide_initial_coordinate_delta) - slider_alloc.x) / (zoom - 1.0);
}
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)
{
if (range->priv->autoscroll_id)
{
gtk_widget_remove_tick_callback (GTK_WIDGET (range),
range->priv->autoscroll_id);
range->priv->autoscroll_id = 0;
}
/* unset initial position so it can be calculated */
range->priv->slide_initial_slider_position = -1;
range->priv->autoscroll_mode = GTK_SCROLL_NONE;
}
static gboolean
autoscroll_cb (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = range->priv;
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 (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 = range->priv;
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);
}
/**
* _gtk_range_get_wheel_delta:
* @range: a #GtkRange
* @event: A #GdkEventScroll
*
* Returns a good step value for the mouse wheel.
*
* Returns: A good step value for the mouse wheel.
*
* Since: 2.4
**/
gdouble
_gtk_range_get_wheel_delta (GtkRange *range,
GdkEventScroll *event)
{
GtkRangePrivate *priv = range->priv;
GtkAdjustment *adjustment = priv->adjustment;
gdouble dx, dy;
gdouble delta = 0;
gdouble page_size;
gdouble page_increment;
gdouble scroll_unit;
GdkScrollDirection direction;
page_size = gtk_adjustment_get_page_size (adjustment);
page_increment = gtk_adjustment_get_page_increment (adjustment);
if (GTK_IS_SCROLLBAR (range))
scroll_unit = pow (page_size, 2.0 / 3.0);
else
scroll_unit = page_increment;
if (gdk_event_get_scroll_deltas ((GdkEvent *) event, &dx, &dy))
{
#ifdef GDK_WINDOWING_QUARTZ
scroll_unit = 1;
#endif
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (range)) == GTK_ORIENTATION_HORIZONTAL)
delta = - (dx ? dx : dy) * scroll_unit;
else
delta = dy * scroll_unit;
}
else if (gdk_event_get_scroll_direction ((GdkEvent *) event, &direction))
{
if (direction == GDK_SCROLL_UP ||
direction == GDK_SCROLL_LEFT)
delta = - scroll_unit;
else
delta = scroll_unit;
}
if (priv->inverted)
delta = - delta;
return delta;
}
static gboolean
gtk_range_scroll_event (GtkWidget *widget,
GdkEventScroll *event)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
if (gtk_widget_get_realized (widget))
{
gdouble delta;
gboolean handled;
delta = _gtk_range_get_wheel_delta (range, event);
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)
{
GtkScrollType mode = GTK_SCROLL_NONE;
if (range->priv->zoom)
{
GtkAllocation allocation;
gint size, pos;
gtk_widget_get_allocation (GTK_WIDGET (range), &allocation);
if (range->priv->orientation == GTK_ORIENTATION_VERTICAL)
{
size = allocation.height;
pos = range->priv->mouse_y;
}
else
{
size = allocation.width;
pos = range->priv->mouse_x;
}
if (pos < SCROLL_EDGE_SIZE)
mode = range->priv->inverted ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD;
else if (pos > (size - SCROLL_EDGE_SIZE))
mode = range->priv->inverted ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD;
}
if (mode != range->priv->autoscroll_mode)
{
remove_autoscroll (range);
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 = range->priv;
gdouble start_x, start_y;
if (priv->grab_location == priv->slider_gadget)
{
gtk_gesture_drag_get_start_point (gesture, &start_x, &start_y);
priv->mouse_x = start_x + offset_x;
priv->mouse_y = start_y + offset_y;
priv->in_drag = TRUE;
update_autoscroll_mode (range);
if (priv->autoscroll_mode == GTK_SCROLL_NONE)
update_slider_position (range, priv->mouse_x, priv->mouse_y);
}
}
static void
gtk_range_drag_gesture_begin (GtkGestureDrag *gesture,
gdouble offset_x,
gdouble offset_y,
GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
if (priv->grab_location == priv->slider_gadget)
gtk_gesture_set_state (priv->drag_gesture, GTK_EVENT_SEQUENCE_CLAIMED);
}
static gboolean
gtk_range_event (GtkWidget *widget,
GdkEvent *event)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gdouble x, y;
if (event->type == GDK_LEAVE_NOTIFY)
{
priv->mouse_x = G_MININT;
priv->mouse_y = G_MININT;
}
else if (gdk_event_get_coords (event, &x, &y))
{
priv->mouse_x = x;
priv->mouse_y = y;
}
gtk_range_update_mouse_location (range);
return GDK_EVENT_PROPAGATE;
}
static void
gtk_range_adjustment_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkRange *range = GTK_RANGE (data);
gtk_range_calc_slider (range);
gtk_range_calc_stepper_sensitivity (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);
gtk_range_calc_slider (range);
gtk_range_calc_stepper_sensitivity (range);
/* now check whether the layout changed */
if (GTK_IS_SCALE (range) && gtk_scale_get_draw_value (GTK_SCALE (range)))
{
gtk_widget_queue_draw (GTK_WIDGET (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);
}
static void
apply_marks (GtkRange *range,
gdouble oldval,
gdouble *newval)
{
GtkRangePrivate *priv = range->priv;
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 = range->priv;
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 = range->priv;
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 = range->priv;
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 = range->priv;
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 = range->priv;
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 = range->priv;
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 = range->priv;
gdouble old_value = gtk_adjustment_get_value (priv->adjustment);
switch (scroll)
{
case GTK_SCROLL_STEP_LEFT:
if (should_invert (range))
step_forward (range);
else
step_back (range);
break;
case GTK_SCROLL_STEP_UP:
if (should_invert (range))
step_forward (range);
else
step_back (range);
break;
case GTK_SCROLL_STEP_RIGHT:
if (should_invert (range))
step_back (range);
else
step_forward (range);
break;
case GTK_SCROLL_STEP_DOWN:
if (should_invert (range))
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 (range))
page_forward (range);
else
page_back (range);
break;
case GTK_SCROLL_PAGE_UP:
if (should_invert (range))
page_forward (range);
else
page_back (range);
break;
case GTK_SCROLL_PAGE_RIGHT:
if (should_invert (range))
page_back (range);
else
page_forward (range);
break;
case GTK_SCROLL_PAGE_DOWN:
if (should_invert (range))
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:
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 gboolean
rectangle_contains_point (GdkRectangle *rect,
gint x,
gint y)
{
return (x >= rect->x) && (x < rect->x + rect->width) &&
(y >= rect->y) && (y < rect->y + rect->height);
}
/* Update mouse location, return TRUE if it changes */
static void
gtk_range_update_mouse_location (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
gint x, y;
GtkCssGadget *old_location;
GtkWidget *widget = GTK_WIDGET (range);
GdkRectangle trough_alloc, slider_alloc, slider_trace;
old_location = priv->mouse_location;
x = priv->mouse_x;
y = priv->mouse_y;
gtk_css_gadget_get_border_box (priv->trough_gadget, &trough_alloc);
gtk_css_gadget_get_border_box (priv->slider_gadget, &slider_alloc);
gdk_rectangle_union (&slider_alloc, &trough_alloc, &slider_trace);
if (priv->grab_location != NULL)
priv->mouse_location = priv->grab_location;
else if (priv->stepper_a_gadget &&
gtk_css_gadget_border_box_contains_point (priv->stepper_a_gadget, x, y))
priv->mouse_location = priv->stepper_a_gadget;
else if (priv->stepper_b_gadget &&
gtk_css_gadget_border_box_contains_point (priv->stepper_b_gadget, x, y))
priv->mouse_location = priv->stepper_b_gadget;
else if (priv->stepper_c_gadget &&
gtk_css_gadget_border_box_contains_point (priv->stepper_c_gadget, x, y))
priv->mouse_location = priv->stepper_c_gadget;
else if (priv->stepper_d_gadget &&
gtk_css_gadget_border_box_contains_point (priv->stepper_d_gadget, x, y))
priv->mouse_location = priv->stepper_d_gadget;
else if (gtk_css_gadget_border_box_contains_point (priv->slider_gadget, x, y))
priv->mouse_location = priv->slider_gadget;
else if (rectangle_contains_point (&slider_trace, x, y))
priv->mouse_location = priv->trough_gadget;
else if (gtk_css_gadget_margin_box_contains_point (priv->gadget, x, y))
priv->mouse_location = priv->gadget;
else
priv->mouse_location = NULL;
if (old_location != priv->mouse_location)
{
if (old_location != NULL)
gtk_css_gadget_queue_allocate (old_location);
if (priv->mouse_location != NULL)
{
gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_PRELIGHT, FALSE);
gtk_css_gadget_queue_allocate (priv->mouse_location);
}
else
{
gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_PRELIGHT);
}
update_trough_state (range);
update_slider_state (range);
update_steppers_state (range);
}
}
static void
gtk_range_compute_slider_position (GtkRange *range,
gdouble adjustment_value,
GdkRectangle *slider_rect)
{
GtkRangePrivate *priv = range->priv;
GtkAllocation trough_content_alloc;
int slider_width, slider_height, min_slider_size;
measure_one_gadget (priv->slider_gadget, &slider_width, &slider_height);
gtk_css_gadget_get_content_box (priv->trough_gadget, &trough_content_alloc);
min_slider_size = priv->min_slider_size;
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 = trough_content_alloc.x + (int) floor ((trough_content_alloc.width - slider_width) / 2);
slider_rect->width = slider_width;
if (priv->slider_use_min_size)
min_slider_size = slider_height;
/* Compute slider position/length */
top = trough_content_alloc.y;
bottom = top + trough_content_alloc.height;
/* Scale slider half extends over the trough edge */
if (GTK_IS_SCALE (range))
{
top -= min_slider_size / 2;
bottom += min_slider_size / 2;
}
/* slider height is the fraction (page_size /
* total_adjustment_range) times the trough height in pixels
*/
if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) != 0)
height = ((bottom - top) * (gtk_adjustment_get_page_size (priv->adjustment) /
(gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment))));
else
height = min_slider_size;
if (height < min_slider_size ||
priv->slider_size_fixed)
height = min_slider_size;
height = MIN (height, trough_content_alloc.height);
y = top;
if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) != 0)
y += (bottom - top - height) * ((adjustment_value - gtk_adjustment_get_lower (priv->adjustment)) /
(gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
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 = trough_content_alloc.y + (int) floor ((trough_content_alloc.height - slider_height) / 2);
slider_rect->height = slider_height;
if (priv->slider_use_min_size)
min_slider_size = slider_width;
/* Compute slider position/length */
left = trough_content_alloc.x;
right = left + trough_content_alloc.width;
/* Scale slider half extends over the trough edge */
if (GTK_IS_SCALE (range))
{
left -= min_slider_size / 2;
right += min_slider_size / 2;
}
/* slider width is the fraction (page_size /
* total_adjustment_range) times the trough width in pixels
*/
if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) != 0)
width = ((right - left) * (gtk_adjustment_get_page_size (priv->adjustment) /
(gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment))));
else
width = min_slider_size;
if (width < min_slider_size ||
priv->slider_size_fixed)
width = min_slider_size;
width = MIN (width, trough_content_alloc.width);
x = left;
if (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) != 0)
x += (right - left - width) * ((adjustment_value - gtk_adjustment_get_lower (priv->adjustment)) /
(gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
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 = range->priv;
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_css_gadget_set_visible (priv->slider_gadget, visible);
gtk_css_gadget_queue_allocate (priv->slider_gadget);
if (priv->has_origin)
gtk_css_gadget_queue_allocate (priv->trough_gadget);
gtk_range_update_mouse_location (range);
}
static void
gtk_range_calc_stepper_sensitivity (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
gboolean was_upper_sensitive, was_lower_sensitive;
was_upper_sensitive = priv->upper_sensitive;
switch (priv->upper_sensitivity)
{
case GTK_SENSITIVITY_AUTO:
priv->upper_sensitive =
(gtk_adjustment_get_value (priv->adjustment) <
(gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)));
break;
case GTK_SENSITIVITY_ON:
priv->upper_sensitive = TRUE;
break;
case GTK_SENSITIVITY_OFF:
priv->upper_sensitive = FALSE;
break;
}
was_lower_sensitive = priv->lower_sensitive;
switch (priv->lower_sensitivity)
{
case GTK_SENSITIVITY_AUTO:
priv->lower_sensitive =
(gtk_adjustment_get_value (priv->adjustment) > gtk_adjustment_get_lower (priv->adjustment));
break;
case GTK_SENSITIVITY_ON:
priv->lower_sensitive = TRUE;
break;
case GTK_SENSITIVITY_OFF:
priv->lower_sensitive = FALSE;
break;
}
/* Too many side effects can influence which stepper reacts to wat condition.
* So we just invalidate them all.
*/
if (was_upper_sensitive != priv->upper_sensitive ||
was_lower_sensitive != priv->lower_sensitive)
{
update_steppers_state (range);
if (priv->stepper_a_gadget)
gtk_css_gadget_queue_allocate (priv->stepper_a_gadget);
if (priv->stepper_b_gadget)
gtk_css_gadget_queue_allocate (priv->stepper_b_gadget);
if (priv->stepper_c_gadget)
gtk_css_gadget_queue_allocate (priv->stepper_c_gadget);
if (priv->stepper_d_gadget)
gtk_css_gadget_queue_allocate (priv->stepper_d_gadget);
}
}
static void
gtk_range_calc_marks (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GdkRectangle slider;
gint i;
for (i = 0; i < priv->n_marks; i++)
{
gtk_range_compute_slider_position (range, priv->marks[i], &slider);
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 = range->priv;
/* 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 = range->priv;
gtk_range_scroll (range, priv->timer->step);
return G_SOURCE_CONTINUE;
}
static gboolean
initial_timeout (gpointer data)
{
GtkRange *range = GTK_RANGE (data);
GtkRangePrivate *priv = range->priv;
priv->timer->timeout_id = gdk_threads_add_timeout (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 = range->priv;
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 = gdk_threads_add_timeout (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 = range->priv;
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 = range->priv;
range->priv->has_origin = has_origin;
if (has_origin)
{
priv->highlight_gadget = gtk_css_custom_gadget_new ("highlight",
GTK_WIDGET (range),
priv->trough_gadget, NULL,
NULL, NULL, NULL,
NULL, NULL);
gtk_css_gadget_set_state (priv->highlight_gadget,
gtk_css_node_get_state (gtk_css_gadget_get_node (priv->trough_gadget)));
update_highlight_position (range);
}
else
{
gtk_css_node_set_parent (gtk_css_gadget_get_node (priv->highlight_gadget), NULL);
g_clear_object (&priv->highlight_gadget);
}
}
gboolean
_gtk_range_get_has_origin (GtkRange *range)
{
return range->priv->has_origin;
}
void
_gtk_range_set_stop_values (GtkRange *range,
gdouble *values,
gint n_values)
{
GtkRangePrivate *priv = range->priv;
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 = range->priv;
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.
*
* Since: 2.24
*/
void
gtk_range_set_round_digits (GtkRange *range,
gint round_digits)
{
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (round_digits >= -1);
if (range->priv->round_digits != round_digits)
{
range->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
*
* Since: 2.24
*/
gint
gtk_range_get_round_digits (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), -1);
return range->priv->round_digits;
}
static void
sync_stepper_gadget (GtkRange *range,
gboolean should_have_stepper,
GtkCssGadget **gadget_ptr,
const gchar *class,
GtkCssImageBuiltinType image_type,
GtkCssGadget *prev_sibling)
{
GtkWidget *widget;
GtkCssGadget *gadget;
GtkCssNode *widget_node;
gboolean has_stepper;
GtkRangePrivate *priv = range->priv;
has_stepper = (*gadget_ptr != NULL);
if (has_stepper == should_have_stepper)
return;
if (!should_have_stepper)
{
if (*gadget_ptr != NULL)
{
gtk_css_node_set_parent (gtk_css_gadget_get_node (*gadget_ptr), NULL);
gtk_box_gadget_remove_gadget (GTK_BOX_GADGET (priv->contents_gadget), *gadget_ptr);
}
g_clear_object (gadget_ptr);
return;
}
widget = GTK_WIDGET (range);
widget_node = gtk_widget_get_css_node (widget);
gadget = gtk_builtin_icon_new ("button",
widget,
NULL, NULL);
gtk_builtin_icon_set_image (GTK_BUILTIN_ICON (gadget), image_type);
gtk_css_gadget_add_class (gadget, class);
gtk_css_gadget_set_state (gadget, gtk_css_node_get_state (widget_node));
gtk_box_gadget_insert_gadget_after (GTK_BOX_GADGET (priv->contents_gadget), prev_sibling,
gadget, FALSE, GTK_ALIGN_FILL);
*gadget_ptr = gadget;
}
void
_gtk_range_set_steppers (GtkRange *range,
gboolean has_a,
gboolean has_b,
gboolean has_c,
gboolean has_d)
{
GtkRangePrivate *priv = range->priv;
sync_stepper_gadget (range,
has_a, &priv->stepper_a_gadget,
"up",
priv->orientation == GTK_ORIENTATION_VERTICAL ?
GTK_CSS_IMAGE_BUILTIN_ARROW_UP : GTK_CSS_IMAGE_BUILTIN_ARROW_LEFT,
NULL);
sync_stepper_gadget (range,
has_b, &priv->stepper_b_gadget,
"down",
priv->orientation == GTK_ORIENTATION_VERTICAL ?
GTK_CSS_IMAGE_BUILTIN_ARROW_DOWN : GTK_CSS_IMAGE_BUILTIN_ARROW_RIGHT,
priv->stepper_a_gadget);
sync_stepper_gadget (range,
has_c, &priv->stepper_c_gadget,
"up",
priv->orientation == GTK_ORIENTATION_VERTICAL ?
GTK_CSS_IMAGE_BUILTIN_ARROW_UP : GTK_CSS_IMAGE_BUILTIN_ARROW_LEFT,
priv->trough_gadget);
sync_stepper_gadget (range,
has_d, &priv->stepper_d_gadget,
"down",
priv->orientation == GTK_ORIENTATION_VERTICAL ?
GTK_CSS_IMAGE_BUILTIN_ARROW_DOWN : GTK_CSS_IMAGE_BUILTIN_ARROW_RIGHT,
priv->stepper_c_gadget ? priv->stepper_c_gadget : priv->trough_gadget);
gtk_widget_queue_resize (GTK_WIDGET (range));
}
GtkCssGadget *
gtk_range_get_slider_gadget (GtkRange *range)
{
return range->priv->slider_gadget;
}
GtkCssGadget *
gtk_range_get_gadget (GtkRange *range)
{
return range->priv->gadget;
}
Reference in New Issue View Git Blame Copy Permalink