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gtk2/gtk/gtkrange.c
Matthias Clasen c73ab94d3f range: Make steppers use smooth autoscrolling 
This makes them work much nicer than the old timer-based
implementation.
2015-02-23 08:38:38 -05:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 2001 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2004. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <stdio.h>
#include <math.h>
#include "gtkrange.h"
#include "gtkrangeprivate.h"
#include "gtkadjustmentprivate.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"
/**
* 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
typedef struct _GtkRangeStepTimer GtkRangeStepTimer;
typedef enum {
MOUSE_OUTSIDE,
MOUSE_STEPPER_A,
MOUSE_STEPPER_B,
MOUSE_STEPPER_C,
MOUSE_STEPPER_D,
MOUSE_TROUGH,
MOUSE_SLIDER,
MOUSE_WIDGET /* inside widget but not in any of the above GUI elements */
} MouseLocation;
struct _GtkRangePrivate
{
MouseLocation mouse_location;
/* last mouse coords we got, or -1 if mouse is outside the range */
gint mouse_x;
gint mouse_y;
MouseLocation grab_location; /* "grabbed" mouse location, OUTSIDE for no grab */
GtkRangeStepTimer *timer;
GtkAdjustment *adjustment;
GtkSensitivityType lower_sensitivity;
GtkSensitivityType upper_sensitivity;
GdkRectangle range_rect; /* Area of entire stepper + trough assembly in widget->window coords */
/* These are in widget->window coordinates */
GdkRectangle stepper_a;
GdkRectangle stepper_b;
GdkRectangle stepper_c;
GdkRectangle stepper_d;
GdkRectangle trough; /* The trough rectangle is the area the thumb can slide in, not the entire range_rect */
GdkRectangle slider;
GdkWindow *event_window;
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;
/* Steppers are: < > ---- < >
* a b c d
*/
guint has_stepper_a : 1;
guint has_stepper_b : 1;
guint has_stepper_c : 1;
guint has_stepper_d : 1;
guint flippable : 1;
guint inverted : 1;
guint recalc_marks : 1;
guint slider_size_fixed : 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;
GtkGesture *long_press_gesture;
GtkScrollType autoscroll_mode;
guint autoscroll_id;
GtkGesture *multipress_gesture;
GtkGesture *drag_gesture;
/* Fill level */
guint show_fill_level : 1;
guint restrict_to_fill_level : 1;
/* Whether dragging is ongoing */
guint in_drag : 1;
};
enum {
PROP_0,
PROP_ORIENTATION,
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
};
enum {
VALUE_CHANGED,
ADJUST_BOUNDS,
MOVE_SLIDER,
CHANGE_VALUE,
LAST_SIGNAL
};
typedef enum {
STEPPER_A,
STEPPER_B,
STEPPER_C,
STEPPER_D
} Stepper;
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_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_drag_gesture_end (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_layout (GtkRange *range);
static void gtk_range_calc_marks (GtkRange *range);
static void gtk_range_get_props (GtkRange *range,
gint *slider_width,
gint *stepper_size,
gint *trough_border,
gint *stepper_spacing,
gboolean *trough_under_steppers,
gint *arrow_displacement_x,
gint *arrow_displacement_y);
static void gtk_range_calc_request (GtkRange *range,
gint slider_width,
gint stepper_size,
gint trough_border,
gint stepper_spacing,
GdkRectangle *range_rect,
GtkBorder *border,
gint *n_steppers_p,
gboolean *has_steppers_ab,
gboolean *has_steppers_cd);
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 void gtk_range_queue_draw_location (GtkRange *range,
MouseLocation location);
static gboolean gtk_range_real_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble value);
static gboolean gtk_range_key_press (GtkWidget *range,
GdkEventKey *event);
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 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;
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;
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,
_gtk_marshal_VOID__VOID,
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,
_gtk_marshal_VOID__DOUBLE,
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,
_gtk_marshal_VOID__ENUM,
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");
g_object_class_install_property (gobject_class,
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));
g_object_class_install_property (gobject_class,
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));
g_object_class_install_property (gobject_class,
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));
g_object_class_install_property (gobject_class,
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
**/
g_object_class_install_property (gobject_class,
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
**/
g_object_class_install_property (gobject_class,
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
**/
g_object_class_install_property (gobject_class,
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
*/
g_object_class_install_property (gobject_class,
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));
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));
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));
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));
/**
* 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.
*/
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));
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));
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));
/**
* 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
*/
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));
/**
* GtkRange:arrow-scaling:
*
* The arrow size proportion relative to the scroll button size.
*
* Since: 2.14
*/
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));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_RANGE_ACCESSIBLE);
}
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_orientable_set_style_classes (GTK_ORIENTABLE (range));
gtk_widget_queue_resize (GTK_WIDGET (range));
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_ADJUSTMENT:
gtk_range_set_adjustment (range, g_value_get_object (value));
break;
case PROP_INVERTED:
gtk_range_set_inverted (range, g_value_get_boolean (value));
break;
case PROP_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;
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->has_stepper_a = FALSE;
priv->has_stepper_b = FALSE;
priv->has_stepper_c = FALSE;
priv->has_stepper_d = FALSE;
priv->round_digits = -1;
priv->mouse_location = MOUSE_OUTSIDE;
priv->mouse_x = -1;
priv->mouse_y = -1;
priv->grab_location = MOUSE_OUTSIDE;
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));
/* 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));
g_signal_connect (priv->drag_gesture, "drag-begin",
G_CALLBACK (gtk_range_drag_gesture_begin), range);
g_signal_connect (priv->drag_gesture, "drag-update",
G_CALLBACK (gtk_range_drag_gesture_update), range);
g_signal_connect (priv->drag_gesture, "drag-end",
G_CALLBACK (gtk_range_drag_gesture_end), range);
priv->multipress_gesture = gtk_gesture_multi_press_new (GTK_WIDGET (range));
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->multipress_gesture), 0);
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 (G_OBJECT (range), "adjustment");
}
}
/**
* 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;
g_object_notify (G_OBJECT (range), "inverted");
gtk_widget_queue_resize (GTK_WIDGET (range));
}
}
/**
* 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;
gtk_widget_queue_draw (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;
}
/**
* 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_range_calc_slider (range);
}
}
/**
* 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
**/
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
**/
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;
}
/**
* 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_range_calc_layout (range);
*range_rect = priv->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;
g_return_if_fail (GTK_IS_RANGE (range));
priv = range->priv;
gtk_range_calc_layout (range);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
if (slider_start)
*slider_start = priv->slider.y;
if (slider_end)
*slider_end = priv->slider.y + priv->slider.height;
}
else
{
if (slider_start)
*slider_start = priv->slider.x;
if (slider_end)
*slider_end = priv->slider.x + priv->slider.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 (G_OBJECT (range), "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 (G_OBJECT (range), "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)
{
priv->show_fill_level = show_fill_level;
g_object_notify (G_OBJECT (range), "show-fill-level");
gtk_widget_queue_draw (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 (G_OBJECT (range), "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 (G_OBJECT (range), "fill-level");
if (priv->show_fill_level)
gtk_widget_queue_draw (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 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
gtk_range_destroy (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gtk_range_remove_step_timer (range);
g_clear_object (&priv->drag_gesture);
g_clear_object (&priv->multipress_gesture);
g_clear_object (&priv->long_press_gesture);
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_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkRange *range;
gint slider_width, stepper_size, trough_border, stepper_spacing;
GdkRectangle range_rect;
GtkBorder border;
range = GTK_RANGE (widget);
gtk_range_get_props (range,
&slider_width, &stepper_size,
&trough_border,
&stepper_spacing, NULL,
NULL, NULL);
gtk_range_calc_request (range,
slider_width, stepper_size,
trough_border, stepper_spacing,
&range_rect, &border, NULL, NULL, NULL);
*minimum = *natural = range_rect.width + border.left + border.right;
}
static void
gtk_range_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkRange *range;
gint slider_width, stepper_size, trough_border, stepper_spacing;
GdkRectangle range_rect;
GtkBorder border;
range = GTK_RANGE (widget);
gtk_range_get_props (range,
&slider_width, &stepper_size,
&trough_border,
&stepper_spacing, NULL,
NULL, NULL);
gtk_range_calc_request (range,
slider_width, stepper_size,
trough_border, stepper_spacing,
&range_rect, &border, NULL, NULL, NULL);
*minimum = *natural = range_rect.height + border.top + border.bottom;
}
static void
gtk_range_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
gtk_widget_set_allocation (widget, allocation);
priv->recalc_marks = TRUE;
gtk_range_calc_layout (range);
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (priv->event_window,
allocation->x, allocation->y,
allocation->width, allocation->height);
_gtk_widget_set_simple_clip (widget, NULL);
}
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_range_calc_layout (range);
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 |
GDK_POINTER_MOTION_HINT_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
_gtk_range_update_context_for_stepper (GtkRange *range,
GtkStyleContext *context,
Stepper stepper)
{
GtkRangePrivate *priv = range->priv;
GtkJunctionSides sides = 0;
gboolean vertical, is_rtl;
vertical = (priv->orientation == GTK_ORIENTATION_VERTICAL);
is_rtl = (gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
/* Take junction sides from what's been
* previously set to the widget itself
*/
sides = gtk_style_context_get_junction_sides (context);
if (vertical)
sides &= ~(GTK_JUNCTION_TOP | GTK_JUNCTION_BOTTOM);
else
sides &= ~(GTK_JUNCTION_LEFT | GTK_JUNCTION_RIGHT);
switch (stepper)
{
case STEPPER_A:
if (vertical)
sides |= GTK_JUNCTION_BOTTOM;
else
sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
break;
case STEPPER_B:
if (priv->has_stepper_a)
{
if (vertical)
sides |= GTK_JUNCTION_TOP;
else
sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
}
if (vertical)
sides |= GTK_JUNCTION_BOTTOM;
else
sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
break;
case STEPPER_C:
if (priv->has_stepper_d)
{
if (vertical)
sides |= GTK_JUNCTION_BOTTOM;
else
sides |= (is_rtl) ? GTK_JUNCTION_LEFT : GTK_JUNCTION_RIGHT;
}
if (vertical)
sides |= GTK_JUNCTION_TOP;
else
sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
break;
case STEPPER_D:
if (vertical)
sides |= GTK_JUNCTION_TOP;
else
sides |= (is_rtl) ? GTK_JUNCTION_RIGHT : GTK_JUNCTION_LEFT;
break;
}
gtk_style_context_set_junction_sides (context, sides);
}
static void
draw_stepper (GtkRange *range,
Stepper stepper,
cairo_t *cr,
GtkArrowType arrow_type,
gboolean clicked,
gboolean prelighted,
GtkStateFlags state)
{
GtkRangePrivate *priv = range->priv;
GtkAllocation allocation;
GtkStyleContext *context;
GtkWidget *widget = GTK_WIDGET (range);
gfloat arrow_scaling;
GdkRectangle *rect;
gdouble arrow_x;
gdouble arrow_y;
gdouble arrow_size, angle;
gboolean arrow_sensitive;
switch (stepper)
{
case STEPPER_A:
rect = &priv->stepper_a;
break;
case STEPPER_B:
rect = &priv->stepper_b;
break;
case STEPPER_C:
rect = &priv->stepper_c;
break;
case STEPPER_D:
rect = &priv->stepper_d;
break;
default:
g_assert_not_reached ();
};
gtk_widget_get_allocation (widget, &allocation);
if ((!priv->inverted && (arrow_type == GTK_ARROW_DOWN ||
arrow_type == GTK_ARROW_RIGHT)) ||
(priv->inverted && (arrow_type == GTK_ARROW_UP ||
arrow_type == GTK_ARROW_LEFT)))
{
arrow_sensitive = priv->upper_sensitive;
}
else
{
arrow_sensitive = priv->lower_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 (clicked)
state |= GTK_STATE_FLAG_ACTIVE;
if (prelighted)
state |= GTK_STATE_FLAG_PRELIGHT;
}
context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
/* don't set junction sides on scrollbar steppers */
if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_SCROLLBAR))
gtk_style_context_set_junction_sides (context, GTK_JUNCTION_NONE);
else
_gtk_range_update_context_for_stepper (range, context, stepper);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
gtk_style_context_set_state (context, state);
switch (arrow_type)
{
case GTK_ARROW_RIGHT:
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
break;
case GTK_ARROW_DOWN:
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
break;
case GTK_ARROW_LEFT:
gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
break;
case GTK_ARROW_UP:
default:
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
break;
}
gtk_render_background (context, cr,
rect->x, rect->y,
rect->width, rect->height);
gtk_render_frame (context, cr,
rect->x, rect->y,
rect->width, rect->height);
gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
arrow_size = MIN (rect->width, rect->height) * arrow_scaling;
arrow_x = rect->x + (rect->width - arrow_size) / 2;
arrow_y = rect->y + (rect->height - arrow_size) / 2;
if (clicked && arrow_sensitive)
{
gint arrow_displacement_x;
gint arrow_displacement_y;
gtk_range_get_props (GTK_RANGE (widget),
NULL, NULL, NULL, NULL, NULL,
&arrow_displacement_x, &arrow_displacement_y);
arrow_x += arrow_displacement_x;
arrow_y += arrow_displacement_y;
}
switch (arrow_type)
{
case GTK_ARROW_RIGHT:
angle = G_PI / 2;
break;
case GTK_ARROW_DOWN:
angle = G_PI;
break;
case GTK_ARROW_LEFT:
angle = 3 * (G_PI / 2);
break;
case GTK_ARROW_UP:
default:
angle = 0;
break;
}
gtk_render_arrow (context, cr,
angle,
arrow_x, arrow_y,
arrow_size);
gtk_style_context_restore (context);
}
static gboolean
gtk_range_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkRange *range = GTK_RANGE (widget);
GtkRangePrivate *priv = range->priv;
GtkStateFlags widget_state;
gboolean draw_trough = TRUE;
gboolean draw_slider = TRUE;
GtkStyleContext *context;
GtkBorder margin;
context = gtk_widget_get_style_context (widget);
if (GTK_IS_SCALE (widget) &&
gtk_adjustment_get_upper (priv->adjustment) == gtk_adjustment_get_lower (priv->adjustment))
{
draw_trough = TRUE;
draw_slider = FALSE;
}
if (GTK_IS_COLOR_SCALE (widget))
{
draw_trough = FALSE;
draw_slider = TRUE;
}
gtk_range_calc_marks (range);
gtk_range_calc_layout (range);
widget_state = gtk_widget_get_state_flags (widget);
/* Just to be confusing, we draw the trough for the whole
* range rectangle, not the trough rectangle (the trough
* rectangle is just for hit detection)
*/
cairo_save (cr);
gdk_cairo_rectangle (cr, &priv->range_rect);
cairo_clip (cr);
{
gint x = priv->range_rect.x;
gint y = priv->range_rect.y;
gint width = priv->range_rect.width;
gint height = priv->range_rect.height;
gboolean trough_under_steppers;
gint stepper_size;
gint stepper_spacing;
gtk_widget_style_get (GTK_WIDGET (range),
"trough-under-steppers", &trough_under_steppers,
"stepper-size", &stepper_size,
"stepper-spacing", &stepper_spacing,
NULL);
if (!trough_under_steppers)
{
gint offset = 0;
gint shorter = 0;
if (priv->has_stepper_a)
offset += stepper_size;
if (priv->has_stepper_b)
offset += stepper_size;
shorter += offset;
if (priv->has_stepper_c)
shorter += stepper_size;
if (priv->has_stepper_d)
shorter += stepper_size;
if (priv->has_stepper_a || priv->has_stepper_b)
{
offset += stepper_spacing;
shorter += stepper_spacing;
}
if (priv->has_stepper_c || priv->has_stepper_d)
{
shorter += stepper_spacing;
}
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
x += offset;
width -= shorter;
}
else
{
y += offset;
height -= shorter;
}
}
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
gtk_style_context_get_margin (context, widget_state, &margin);
x += margin.left;
y += margin.top;
width -= margin.left + margin.right;
height -= margin.top + margin.bottom;
if (draw_trough)
{
if (!priv->has_origin || !draw_slider)
{
gtk_render_background (context, cr,
x, y, width, height);
gtk_render_frame (context, cr,
x, y, width, height);
}
else
{
gboolean is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
gint trough_change_pos_x = width;
gint trough_change_pos_y = height;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
trough_change_pos_x = (priv->slider.x +
priv->slider.width / 2 -
x);
else
trough_change_pos_y = (priv->slider.y +
priv->slider.height / 2 -
y);
gtk_style_context_save (context);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
if (!is_rtl)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_HIGHLIGHT);
}
else
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
gtk_render_background (context, cr, x, y,
trough_change_pos_x,
trough_change_pos_y);
gtk_render_frame (context, cr, x, y,
trough_change_pos_x,
trough_change_pos_y);
gtk_style_context_restore (context);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
trough_change_pos_y = 0;
else
trough_change_pos_x = 0;
gtk_style_context_save (context);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
if (is_rtl)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_HIGHLIGHT);
}
else
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_HIGHLIGHT);
}
gtk_render_background (context, cr,
x + trough_change_pos_x, y + trough_change_pos_y,
width - trough_change_pos_x,
height - trough_change_pos_y);
gtk_render_frame (context, cr,
x + trough_change_pos_x, y + trough_change_pos_y,
width - trough_change_pos_x,
height - trough_change_pos_y);
gtk_style_context_restore (context);
}
}
gtk_style_context_restore (context);
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 fill_level = priv->fill_level;
gint fill_x = x;
gint fill_y = y;
gint fill_width = width;
gint fill_height = height;
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
fill_level = CLAMP (fill_level, gtk_adjustment_get_lower (priv->adjustment),
gtk_adjustment_get_upper (priv->adjustment) -
gtk_adjustment_get_page_size (priv->adjustment));
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
fill_x = priv->trough.x;
fill_width = (priv->slider.width +
(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)) *
(priv->trough.width -
priv->slider.width));
if (should_invert (range))
fill_x += priv->trough.width - fill_width;
}
else
{
fill_y = priv->trough.y;
fill_height = (priv->slider.height +
(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)) *
(priv->trough.height -
priv->slider.height));
if (should_invert (range))
fill_y += priv->trough.height - fill_height;
}
gtk_render_background (context, cr, fill_x, fill_y, fill_width, fill_height);
gtk_render_frame (context, cr, fill_x, fill_y, fill_width, fill_height);
gtk_style_context_restore (context);
}
if (!(widget_state & GTK_STATE_FLAG_INSENSITIVE) && gtk_widget_has_visible_focus (widget))
{
gtk_render_focus (context, cr,
priv->range_rect.x,
priv->range_rect.y,
priv->range_rect.width,
priv->range_rect.height);
}
}
cairo_restore (cr);
if (draw_slider)
{
GtkStateFlags state = widget_state;
state &= ~(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_ACTIVE);
if (priv->mouse_location == MOUSE_SLIDER && !(state & GTK_STATE_FLAG_INSENSITIVE))
state |= GTK_STATE_FLAG_PRELIGHT;
if (priv->grab_location == MOUSE_SLIDER)
state |= GTK_STATE_FLAG_ACTIVE;
cairo_save (cr);
gdk_cairo_rectangle (cr, &priv->slider);
cairo_clip (cr);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
gtk_style_context_get_margin (context, widget_state, &margin);
gtk_style_context_set_state (context, state);
gtk_render_slider (context, cr,
priv->slider.x + margin.left,
priv->slider.y + margin.top,
priv->slider.width - margin.left - margin.right,
priv->slider.height - margin.top - margin.bottom,
priv->orientation);
gtk_style_context_restore (context);
cairo_restore (cr);
}
if (priv->has_stepper_a)
draw_stepper (range, STEPPER_A, cr,
priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
priv->grab_location == MOUSE_STEPPER_A,
priv->mouse_location == MOUSE_STEPPER_A,
widget_state);
if (priv->has_stepper_b)
draw_stepper (range, STEPPER_B, cr,
priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
priv->grab_location == MOUSE_STEPPER_B,
priv->mouse_location == MOUSE_STEPPER_B,
widget_state);
if (priv->has_stepper_c)
draw_stepper (range, STEPPER_C, cr,
priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
priv->grab_location == MOUSE_STEPPER_C,
priv->mouse_location == MOUSE_STEPPER_C,
widget_state);
if (priv->has_stepper_d)
draw_stepper (range, STEPPER_D, cr,
priv->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
priv->grab_location == MOUSE_STEPPER_D,
priv->mouse_location == MOUSE_STEPPER_D,
widget_state);
return FALSE;
}
static void
range_grab_add (GtkRange *range,
MouseLocation 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_range_queue_draw_location (range, location);
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");
gtk_widget_queue_draw (GTK_WIDGET (range));
range->priv->zoom = enabled;
}
static void
range_grab_remove (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GtkStyleContext *context;
context = gtk_widget_get_style_context (GTK_WIDGET (range));
gtk_range_queue_draw_location (range, priv->grab_location);
priv->grab_location = MOUSE_OUTSIDE;
gtk_range_update_mouse_location (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));
switch (priv->grab_location)
{
/* Backward stepper */
case MOUSE_STEPPER_A:
case MOUSE_STEPPER_C:
switch (grab_button)
{
case GDK_BUTTON_PRIMARY:
return invert ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD;
break;
case GDK_BUTTON_MIDDLE:
return invert ? GTK_SCROLL_PAGE_FORWARD : GTK_SCROLL_PAGE_BACKWARD;
break;
case GDK_BUTTON_SECONDARY:
return invert ? GTK_SCROLL_END : GTK_SCROLL_START;
break;
}
break;
/* Forward stepper */
case MOUSE_STEPPER_B:
case MOUSE_STEPPER_D:
switch (grab_button)
{
case GDK_BUTTON_PRIMARY:
return invert ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD;
break;
case GDK_BUTTON_MIDDLE:
return invert ? GTK_SCROLL_PAGE_BACKWARD : GTK_SCROLL_PAGE_FORWARD;
break;
case GDK_BUTTON_SECONDARY:
return invert ? GTK_SCROLL_START : GTK_SCROLL_END;
break;
}
break;
/* In the trough */
case MOUSE_TROUGH:
{
if (priv->trough_click_forward)
return GTK_SCROLL_PAGE_FORWARD;
else
return GTK_SCROLL_PAGE_BACKWARD;
}
break;
case MOUSE_OUTSIDE:
case MOUSE_SLIDER:
case MOUSE_WIDGET:
break;
}
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;
gint trough_border;
gint trough_under_steppers;
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
trough_length = priv->trough.height;
trough_start = priv->trough.y;
slider_length = priv->slider.height;
}
else
{
trough_length = priv->trough.width;
trough_start = priv->trough.x;
slider_length = priv->slider.width;
}
gtk_range_get_props (range, NULL, NULL, &trough_border, NULL,
&trough_under_steppers, NULL, NULL);
if (! trough_under_steppers)
{
trough_start += trough_border;
trough_length -= 2 * trough_border;
}
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 != MOUSE_OUTSIDE)
{
stop_scrolling (range);
update_slider_position (range,
priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position,
priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position);
return TRUE;
}
else if (priv->in_drag &&
(event->keyval == GDK_KEY_Shift_L ||
event->keyval == GDK_KEY_Shift_R))
{
update_zoom_state (range, !priv->zoom);
return TRUE;
}
return GTK_WIDGET_CLASS (gtk_range_parent_class)->key_press_event (widget, event);
}
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 == MOUSE_SLIDER && !priv->zoom)
{
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
priv->slide_initial_slider_position = priv->slider.y;
priv->slide_initial_coordinate_delta = y - priv->slider.y;
}
else
{
priv->slide_initial_slider_position = priv->slider.x;
priv->slide_initial_coordinate_delta = x - priv->slider.x;
}
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;
gint page_increment_button, warp_button;
guint button;
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);
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);
g_object_get (gtk_widget_get_settings (widget),
"gtk-primary-button-warps-slider", &primary_warps,
NULL);
if (primary_warps)
{
warp_button = GDK_BUTTON_PRIMARY;
page_increment_button = GDK_BUTTON_SECONDARY;
}
else
{
warp_button = GDK_BUTTON_MIDDLE;
page_increment_button = GDK_BUTTON_PRIMARY;
}
if (priv->mouse_location == MOUSE_SLIDER &&
gdk_event_triggers_context_menu ((GdkEvent *)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 (source != GDK_SOURCE_TOUCHSCREEN &&
priv->mouse_location == MOUSE_TROUGH &&
button == page_increment_button)
{
/* button 2 steps by page increment, as with button 2 on a stepper
*/
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, MOUSE_TROUGH);
scroll = range_get_scroll_for_grab (range);
gtk_range_add_step_timer (range, scroll);
}
else if ((priv->mouse_location == MOUSE_STEPPER_A ||
priv->mouse_location == MOUSE_STEPPER_B ||
priv->mouse_location == MOUSE_STEPPER_C ||
priv->mouse_location == MOUSE_STEPPER_D) &&
(button == GDK_BUTTON_PRIMARY ||
button == GDK_BUTTON_MIDDLE ||
button == GDK_BUTTON_SECONDARY))
{
GtkScrollType scroll;
range_grab_add (range, priv->mouse_location);
gtk_range_queue_draw_location (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 == MOUSE_TROUGH &&
(source == GDK_SOURCE_TOUCHSCREEN ||
button == warp_button)) ||
priv->mouse_location == MOUSE_SLIDER)
{
gboolean need_value_update = FALSE;
GdkRectangle slider;
/* Any button can be used to drag the slider, but you can start
* dragging the slider with a trough click using button 1;
* we warp the slider to mouse position, then begin the slider drag.
*/
if (priv->mouse_location != MOUSE_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 - priv->slider.height :
x - priv->slider.width);
/* compute new value for warped slider */
new_value = slider_low_value + (slider_high_value - slider_low_value) / 2;
gtk_range_compute_slider_position (range, new_value, &slider);
/* defer adjustment updates to update_slider_position() in order
* to keep pixel quantisation
*/
need_value_update = TRUE;
}
else
{
GdkModifierType state_mask;
gdk_event_get_state (event, &state_mask);
/* Shift-click in the slider = fine adjustment */
if (state_mask & GDK_SHIFT_MASK)
{
update_zoom_state (range, TRUE);
}
slider = priv->slider;
}
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
priv->slide_initial_slider_position = slider.y;
priv->slide_initial_coordinate_delta = y - slider.y;
}
else
{
priv->slide_initial_slider_position = slider.x;
priv->slide_initial_coordinate_delta = x - slider.x;
}
range_grab_add (range, MOUSE_SLIDER);
gtk_widget_queue_draw (widget);
if (need_value_update)
update_slider_position (range, x, y);
}
if (priv->grab_location == MOUSE_SLIDER);
/* leave it to ::drag-begin to claim the sequence */
else if (priv->grab_location != MOUSE_OUTSIDE)
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;
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 slider_start, slider_end;
gint i;
if (priv->zoom)
{
zoom = MIN(1.0, (priv->orientation == GTK_ORIENTATION_VERTICAL ?
priv->trough.height : priv->trough.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)
{
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
priv->slide_initial_slider_position = (zoom * (mouse_y - priv->slide_initial_coordinate_delta) - priv->slider.y) / (zoom - 1.0);
else
priv->slide_initial_slider_position = (zoom * (mouse_x - priv->slide_initial_coordinate_delta) - priv->slider.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);
gtk_range_get_slider_range (range, &slider_start, &slider_end);
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) < (slider_end - slider_start) * 0.5 * 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;
switch (priv->autoscroll_mode)
{
case GTK_SCROLL_STEP_FORWARD:
increment = gtk_adjustment_get_step_increment (adj) / AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_PAGE_FORWARD:
increment = gtk_adjustment_get_page_increment (adj) / AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_STEP_BACKWARD:
increment = - gtk_adjustment_get_step_increment (adj) / AUTOSCROLL_FACTOR;
break;
case GTK_SCROLL_PAGE_BACKWARD:
increment = - gtk_adjustment_get_page_increment (adj) / 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;
gdouble page_size;
gdouble page_increment;
gdouble scroll_unit;
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 (dx != 0 &&
gtk_orientable_get_orientation (GTK_ORIENTABLE (range)) == GTK_ORIENTATION_HORIZONTAL)
delta = dx * scroll_unit;
else
delta = dy * scroll_unit;
}
else
{
if (event->direction == GDK_SCROLL_UP ||
event->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 TRUE;
}
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;
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)
{
if (range->priv->grab_location == MOUSE_SLIDER)
gtk_gesture_set_state (range->priv->drag_gesture, GTK_EVENT_SEQUENCE_CLAIMED);
}
static void
gtk_range_drag_gesture_end (GtkGestureDrag *gesture,
gdouble offset_x,
gdouble offset_y,
GtkRange *range)
{
range->priv->in_drag = FALSE;
stop_scrolling (range);
}
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 = -1;
priv->mouse_y = -1;
}
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 void
gtk_range_get_props (GtkRange *range,
gint *slider_width,
gint *stepper_size,
gint *trough_border,
gint *stepper_spacing,
gboolean *trough_under_steppers,
gint *arrow_displacement_x,
gint *arrow_displacement_y)
{
GtkWidget *widget = GTK_WIDGET (range);
gint tmp_slider_width, tmp_stepper_size, tmp_trough_border;
gint tmp_stepper_spacing, tmp_trough_under_steppers;
gint tmp_arrow_displacement_x, tmp_arrow_displacement_y;
gtk_widget_style_get (widget,
"slider-width", &tmp_slider_width,
"trough-border", &tmp_trough_border,
"stepper-size", &tmp_stepper_size,
"stepper-spacing", &tmp_stepper_spacing,
"trough-under-steppers", &tmp_trough_under_steppers,
"arrow-displacement-x", &tmp_arrow_displacement_x,
"arrow-displacement-y", &tmp_arrow_displacement_y,
NULL);
if (slider_width)
*slider_width = tmp_slider_width;
if (trough_border)
*trough_border = tmp_trough_border;
if (stepper_size)
*stepper_size = tmp_stepper_size;
if (stepper_spacing)
*stepper_spacing = tmp_stepper_spacing;
if (trough_under_steppers)
*trough_under_steppers = tmp_trough_under_steppers;
if (arrow_displacement_x)
*arrow_displacement_x = tmp_arrow_displacement_x;
if (arrow_displacement_y)
*arrow_displacement_y = tmp_arrow_displacement_y;
}
#define POINT_IN_RECT(xcoord, ycoord, rect) \
((xcoord) >= (rect).x && \
(xcoord) < ((rect).x + (rect).width) && \
(ycoord) >= (rect).y && \
(ycoord) < ((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;
GtkAllocation allocation;
gint x, y;
MouseLocation old;
GtkWidget *widget = GTK_WIDGET (range);
old = priv->mouse_location;
x = priv->mouse_x;
y = priv->mouse_y;
gtk_widget_get_allocation (widget, &allocation);
if (priv->grab_location != MOUSE_OUTSIDE)
priv->mouse_location = priv->grab_location;
else if (POINT_IN_RECT (x, y, priv->stepper_a))
priv->mouse_location = MOUSE_STEPPER_A;
else if (POINT_IN_RECT (x, y, priv->stepper_b))
priv->mouse_location = MOUSE_STEPPER_B;
else if (POINT_IN_RECT (x, y, priv->stepper_c))
priv->mouse_location = MOUSE_STEPPER_C;
else if (POINT_IN_RECT (x, y, priv->stepper_d))
priv->mouse_location = MOUSE_STEPPER_D;
else if (POINT_IN_RECT (x, y, priv->slider))
priv->mouse_location = MOUSE_SLIDER;
else if (POINT_IN_RECT (x, y, priv->trough))
priv->mouse_location = MOUSE_TROUGH;
else if (POINT_IN_RECT (x, y, allocation))
priv->mouse_location = MOUSE_WIDGET;
else
priv->mouse_location = MOUSE_OUTSIDE;
if (old != priv->mouse_location)
{
gtk_range_queue_draw_location (range, old);
gtk_range_queue_draw_location (range, priv->mouse_location);
if (priv->mouse_location == MOUSE_OUTSIDE)
gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_PRELIGHT);
else
gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_PRELIGHT, FALSE);
}
}
/* Clamp rect, border inside widget->allocation, such that we prefer
* to take space from border not rect in all directions, and prefer to
* give space to border over rect in one direction.
*/
static void
clamp_dimensions (GtkWidget *widget,
GdkRectangle *rect,
GtkBorder *border,
gboolean border_expands_horizontally)
{
GtkAllocation allocation;
gint extra, shortage;
g_return_if_fail (rect->x == 0);
g_return_if_fail (rect->y == 0);
g_return_if_fail (rect->width >= 0);
g_return_if_fail (rect->height >= 0);
gtk_widget_get_allocation (widget, &allocation);
/* Width */
extra = allocation.width - border->left - border->right - rect->width;
if (extra > 0)
{
if (border_expands_horizontally)
{
border->left += extra / 2;
border->right += extra / 2 + extra % 2;
}
else
{
rect->width += extra;
}
}
/* See if we can fit rect, if not kill the border */
shortage = rect->width - allocation.width;
if (shortage > 0)
{
rect->width = allocation.width;
/* lose the border */
border->left = 0;
border->right = 0;
}
else
{
/* See if we can fit rect with borders */
shortage = rect->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 - rect->height;
if (extra > 0)
{
if (border_expands_horizontally)
{
/* don't expand border vertically */
rect->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 = rect->height - allocation.height;
if (shortage > 0)
{
rect->height = allocation.height;
/* lose the border */
border->top = 0;
border->bottom = 0;
}
else
{
/* See if we can fit rect with borders */
shortage = rect->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_calc_request (GtkRange *range,
gint slider_width,
gint stepper_size,
gint trough_border,
gint stepper_spacing,
GdkRectangle *range_rect,
GtkBorder *border,
gint *n_steppers_p,
gboolean *has_steppers_ab,
gboolean *has_steppers_cd)
{
GtkRangePrivate *priv = range->priv;
gint n_steppers;
gint n_steppers_ab;
gint n_steppers_cd;
border->left = 0;
border->right = 0;
border->top = 0;
border->bottom = 0;
if (GTK_RANGE_GET_CLASS (range)->get_range_border)
GTK_RANGE_GET_CLASS (range)->get_range_border (range, border);
n_steppers_ab = 0;
n_steppers_cd = 0;
if (priv->has_stepper_a)
n_steppers_ab += 1;
if (priv->has_stepper_b)
n_steppers_ab += 1;
if (priv->has_stepper_c)
n_steppers_cd += 1;
if (priv->has_stepper_d)
n_steppers_cd += 1;
n_steppers = n_steppers_ab + n_steppers_cd;
range_rect->x = 0;
range_rect->y = 0;
/* We never expand to fill available space in the small dimension
* (i.e. vertical scrollbars are always a fixed width)
*/
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
range_rect->width = + trough_border * 2 + slider_width;
range_rect->height = stepper_size * n_steppers + trough_border * 2 + priv->min_slider_size;
if (n_steppers_ab > 0)
range_rect->height += stepper_spacing;
if (n_steppers_cd > 0)
range_rect->height += stepper_spacing;
}
else
{
range_rect->width = stepper_size * n_steppers + trough_border * 2 + priv->min_slider_size;
range_rect->height = trough_border * 2 + slider_width;
if (n_steppers_ab > 0)
range_rect->width += stepper_spacing;
if (n_steppers_cd > 0)
range_rect->width += stepper_spacing;
}
if (n_steppers_p)
*n_steppers_p = n_steppers;
if (has_steppers_ab)
*has_steppers_ab = (n_steppers_ab > 0);
if (has_steppers_cd)
*has_steppers_cd = (n_steppers_cd > 0);
}
static void
gtk_range_compute_slider_position (GtkRange *range,
gdouble adjustment_value,
GdkRectangle *slider_rect)
{
GtkRangePrivate *priv = range->priv;
gint trough_border;
gboolean trough_under_steppers;
gtk_range_get_props (range, NULL, NULL, &trough_border, NULL,
&trough_under_steppers, NULL, NULL);
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 = priv->trough.x + trough_border;
slider_rect->width = priv->trough.width - trough_border * 2;
/* Compute slider position/length */
top = priv->trough.y;
bottom = priv->trough.y + priv->trough.height;
if (! trough_under_steppers)
{
top += trough_border;
bottom -= trough_border;
}
/* 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 = priv->min_slider_size;
if (height < priv->min_slider_size ||
priv->slider_size_fixed)
height = priv->min_slider_size;
height = MIN (height, priv->trough.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 = priv->trough.y + trough_border;
slider_rect->height = priv->trough.height - trough_border * 2;
/* Compute slider position/length */
left = priv->trough.x;
right = priv->trough.x + priv->trough.width;
if (! trough_under_steppers)
{
left += trough_border;
right -= trough_border;
}
/* 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 = priv->min_slider_size;
if (width < priv->min_slider_size ||
priv->slider_size_fixed)
width = priv->min_slider_size;
width = MIN (width, priv->trough.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 gboolean
rectangle_equal (const GdkRectangle *a,
const GdkRectangle *b)
{
return a->x == b->x
&& a->y == b->y
&& a->width == b->width
&& a->height == b->height;
}
static void
gtk_range_calc_slider (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GdkRectangle new_slider;
gtk_range_compute_slider_position (range,
gtk_adjustment_get_value (priv->adjustment),
&new_slider);
if (rectangle_equal (&priv->slider, &new_slider))
return;
gtk_range_queue_draw_location (range, MOUSE_SLIDER);
priv->slider = new_slider;
gtk_range_queue_draw_location (range, MOUSE_SLIDER);
if (priv->has_origin)
gtk_range_queue_draw_location (range, MOUSE_TROUGH);
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)
{
gtk_range_queue_draw_location (range, MOUSE_STEPPER_A);
gtk_range_queue_draw_location (range, MOUSE_STEPPER_B);
gtk_range_queue_draw_location (range, MOUSE_STEPPER_C);
gtk_range_queue_draw_location (range, MOUSE_STEPPER_D);
}
}
static void
gtk_range_calc_layout (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
gint slider_width, stepper_size, trough_border, stepper_spacing;
GtkBorder border;
gint n_steppers;
gboolean has_steppers_ab;
gboolean has_steppers_cd;
gboolean trough_under_steppers;
GdkRectangle range_rect;
GtkWidget *widget;
/* If we have a too-small allocation, we prefer the steppers over
* the trough/slider, probably the steppers are a more useful
* feature in small spaces.
*
* Also, we prefer to draw the range itself rather than the border
* areas if there's a conflict, since the borders will be decoration
* not controls. Though this depends on subclasses cooperating by
* not drawing on priv->range_rect.
*/
widget = GTK_WIDGET (range);
gtk_range_get_props (range,
&slider_width, &stepper_size,
&trough_border,
&stepper_spacing, &trough_under_steppers,
NULL, NULL);
gtk_range_calc_request (range,
slider_width, stepper_size,
trough_border, stepper_spacing,
&range_rect, &border, &n_steppers,
&has_steppers_ab, &has_steppers_cd);
/* We never expand to fill available space in the small dimension
* (i.e. vertical scrollbars are always a fixed width)
*/
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
clamp_dimensions (widget, &range_rect, &border, TRUE);
}
else
{
clamp_dimensions (widget, &range_rect, &border, FALSE);
}
range_rect.x = border.left;
range_rect.y = border.top;
priv->range_rect = range_rect;
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
gint stepper_width, stepper_height;
/* Steppers are the width of the range, and stepper_size in
* height, or if we don't have enough height, divided equally
* among available space.
*/
stepper_width = range_rect.width;
if (trough_under_steppers)
stepper_width -= trough_border * 2;
if (stepper_width < 1)
stepper_width = range_rect.width; /* screw the trough border */
if (n_steppers == 0)
stepper_height = 0; /* avoid divide by n_steppers */
else
stepper_height = MIN (stepper_size, (range_rect.height / n_steppers));
/* Stepper A */
priv->stepper_a.x = range_rect.x + trough_border * trough_under_steppers;
priv->stepper_a.y = range_rect.y + trough_border * trough_under_steppers;
if (priv->has_stepper_a)
{
priv->stepper_a.width = stepper_width;
priv->stepper_a.height = stepper_height;
}
else
{
priv->stepper_a.width = 0;
priv->stepper_a.height = 0;
}
/* Stepper B */
priv->stepper_b.x = priv->stepper_a.x;
priv->stepper_b.y = priv->stepper_a.y + priv->stepper_a.height;
if (priv->has_stepper_b)
{
priv->stepper_b.width = stepper_width;
priv->stepper_b.height = stepper_height;
}
else
{
priv->stepper_b.width = 0;
priv->stepper_b.height = 0;
}
/* Stepper D */
if (priv->has_stepper_d)
{
priv->stepper_d.width = stepper_width;
priv->stepper_d.height = stepper_height;
}
else
{
priv->stepper_d.width = 0;
priv->stepper_d.height = 0;
}
priv->stepper_d.x = priv->stepper_a.x;
priv->stepper_d.y = range_rect.y + range_rect.height - priv->stepper_d.height - trough_border * trough_under_steppers;
/* Stepper C */
if (priv->has_stepper_c)
{
priv->stepper_c.width = stepper_width;
priv->stepper_c.height = stepper_height;
}
else
{
priv->stepper_c.width = 0;
priv->stepper_c.height = 0;
}
priv->stepper_c.x = priv->stepper_a.x;
priv->stepper_c.y = priv->stepper_d.y - priv->stepper_c.height;
/* Now the trough is the remaining space between steppers B and C,
* if any, minus spacing
*/
priv->trough.x = range_rect.x;
priv->trough.y = priv->stepper_b.y + priv->stepper_b.height + stepper_spacing * has_steppers_ab;
priv->trough.width = range_rect.width;
priv->trough.height = priv->stepper_c.y - priv->trough.y - stepper_spacing * has_steppers_cd;
}
else
{
gint stepper_width, stepper_height;
/* Steppers are the height of the range, and stepper_size in
* width, or if we don't have enough width, divided equally
* among available space.
*/
stepper_height = range_rect.height;
if (trough_under_steppers)
stepper_height -= trough_border * 2;
if (stepper_height < 1)
stepper_height = range_rect.height; /* screw the trough border */
if (n_steppers == 0)
stepper_width = 0; /* avoid divide by n_steppers */
else
stepper_width = MIN (stepper_size, (range_rect.width / n_steppers));
/* Stepper A */
priv->stepper_a.x = range_rect.x + trough_border * trough_under_steppers;
priv->stepper_a.y = range_rect.y + trough_border * trough_under_steppers;
if (priv->has_stepper_a)
{
priv->stepper_a.width = stepper_width;
priv->stepper_a.height = stepper_height;
}
else
{
priv->stepper_a.width = 0;
priv->stepper_a.height = 0;
}
/* Stepper B */
priv->stepper_b.x = priv->stepper_a.x + priv->stepper_a.width;
priv->stepper_b.y = priv->stepper_a.y;
if (priv->has_stepper_b)
{
priv->stepper_b.width = stepper_width;
priv->stepper_b.height = stepper_height;
}
else
{
priv->stepper_b.width = 0;
priv->stepper_b.height = 0;
}
/* Stepper D */
if (priv->has_stepper_d)
{
priv->stepper_d.width = stepper_width;
priv->stepper_d.height = stepper_height;
}
else
{
priv->stepper_d.width = 0;
priv->stepper_d.height = 0;
}
priv->stepper_d.x = range_rect.x + range_rect.width - priv->stepper_d.width - trough_border * trough_under_steppers;
priv->stepper_d.y = priv->stepper_a.y;
/* Stepper C */
if (priv->has_stepper_c)
{
priv->stepper_c.width = stepper_width;
priv->stepper_c.height = stepper_height;
}
else
{
priv->stepper_c.width = 0;
priv->stepper_c.height = 0;
}
priv->stepper_c.x = priv->stepper_d.x - priv->stepper_c.width;
priv->stepper_c.y = priv->stepper_a.y;
/* Now the trough is the remaining space between steppers B and C,
* if any
*/
priv->trough.x = priv->stepper_b.x + priv->stepper_b.width + stepper_spacing * has_steppers_ab;
priv->trough.y = range_rect.y;
priv->trough.width = priv->stepper_c.x - priv->trough.x - stepper_spacing * has_steppers_cd;
priv->trough.height = range_rect.height;
}
gtk_range_calc_slider (range);
gtk_range_update_mouse_location (range);
gtk_range_calc_stepper_sensitivity (range);
}
static void
gtk_range_queue_draw_location (GtkRange *range,
MouseLocation location)
{
GtkRangePrivate *priv = range->priv;
GtkWidget *widget = GTK_WIDGET (range);
const GdkRectangle *rect;
GdkRectangle allocation;
switch (location)
{
case MOUSE_STEPPER_A:
rect = &priv->stepper_a;
break;
case MOUSE_STEPPER_B:
rect = &priv->stepper_b;
break;
case MOUSE_STEPPER_C:
rect = &priv->stepper_c;
break;
case MOUSE_STEPPER_D:
rect = &priv->stepper_d;
break;
case MOUSE_TROUGH:
rect = &priv->trough;
break;
case MOUSE_SLIDER:
rect = &priv->slider;
break;
case MOUSE_WIDGET:
case MOUSE_OUTSIDE:
return;
default:
g_assert_not_reached ();
return;
}
if (rect->width <= 0 || rect->height <= 0)
return;
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_queue_draw_area (widget,
allocation.x + rect->x,
allocation.y + rect->y,
rect->width,
rect->height);
}
static void
gtk_range_calc_marks (GtkRange *range)
{
GtkRangePrivate *priv = range->priv;
GdkRectangle slider;
gint i;
if (!priv->recalc_marks)
return;
priv->recalc_marks = FALSE;
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 TRUE;
}
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");
/* remove self */
return FALSE;
}
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)
{
range->priv->has_origin = has_origin;
}
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];
priv->recalc_marks = TRUE;
}
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 (G_OBJECT (range), "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;
}
void
_gtk_range_set_steppers (GtkRange *range,
gboolean has_a,
gboolean has_b,
gboolean has_c,
gboolean has_d)
{
range->priv->has_stepper_a = has_a;
range->priv->has_stepper_b = has_b;
range->priv->has_stepper_c = has_c;
range->priv->has_stepper_d = has_d;
gtk_widget_queue_resize (GTK_WIDGET (range));
}
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