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gtk2/gtk/gtkswitch.c
Emmanuele Bassi ed39721aa7 Add fallbacks for GtkSwitch state labels 
While the IEC power symbols have been part of Unicode since version 9.0,
released in 2016, not every font supports them.

We can use the old symbols as a fallback, as they seem to have the
better coverage, if not the best appearance.
2019-01-15 15:22:09 +00:00

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This file contains ambiguous Unicode characters

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

/* GTK - The GIMP Toolkit
*
* Copyright (C) 2010 Intel Corporation
* Copyright (C) 2010 RedHat, 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/>.
*
* Author:
* Emmanuele Bassi <ebassi@linux.intel.com>
* Matthias Clasen <mclasen@redhat.com>
*
* Based on similar code from Mx.
*/
/**
* SECTION:gtkswitch
* @Short_Description: A “light switch” style toggle
* @Title: GtkSwitch
* @See_Also: #GtkToggleButton
*
* #GtkSwitch is a widget that has two states: on or off. The user can control
* which state should be active by clicking the empty area, or by dragging the
* handle.
*
* GtkSwitch can also handle situations where the underlying state changes with
* a delay. See #GtkSwitch::state-set for details.
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* switch
* ╰── slider
* ]|
*
* GtkSwitch has two css nodes, the main node with the name switch and a subnode
* named slider. Neither of them is using any style classes.
*/
#include "config.h"
#include "gtkswitch.h"
#include "deprecated/gtkactivatable.h"
#include "deprecated/gtktoggleaction.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtkwidget.h"
#include "gtkmarshalers.h"
#include "gtkapplicationprivate.h"
#include "gtkactionable.h"
#include "a11y/gtkswitchaccessible.h"
#include "gtkactionhelper.h"
#include "gtkcsscustomgadgetprivate.h"
#include "gtkcssgadgetprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkcssshadowsvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkprogresstrackerprivate.h"
#include "gtksettingsprivate.h"
#include "fallback-c89.c"
#define DEFAULT_SLIDER_WIDTH (36)
#define DEFAULT_SLIDER_HEIGHT (22)
struct _GtkSwitchPrivate
{
GdkWindow *event_window;
GtkAction *action;
GtkActionHelper *action_helper;
GtkGesture *pan_gesture;
GtkGesture *multipress_gesture;
GtkCssGadget *gadget;
GtkCssGadget *slider_gadget;
PangoLayout *off_layout;
PangoLayout *on_layout;
double handle_pos;
guint tick_id;
GtkProgressTracker tracker;
guint state : 1;
guint is_active : 1;
guint in_switch : 1;
guint use_action_appearance : 1;
};
enum
{
PROP_0,
PROP_ACTIVE,
PROP_STATE,
PROP_RELATED_ACTION,
PROP_USE_ACTION_APPEARANCE,
LAST_PROP,
PROP_ACTION_NAME,
PROP_ACTION_TARGET
};
enum
{
ACTIVATE,
STATE_SET,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static GParamSpec *switch_props[LAST_PROP] = { NULL, };
static void gtk_switch_actionable_iface_init (GtkActionableInterface *iface);
static void gtk_switch_activatable_interface_init (GtkActivatableIface *iface);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
G_DEFINE_TYPE_WITH_CODE (GtkSwitch, gtk_switch, GTK_TYPE_WIDGET,
G_ADD_PRIVATE (GtkSwitch)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACTIONABLE,
gtk_switch_actionable_iface_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACTIVATABLE,
gtk_switch_activatable_interface_init));
G_GNUC_END_IGNORE_DEPRECATIONS;
static void
gtk_switch_end_toggle_animation (GtkSwitch *sw)
{
GtkSwitchPrivate *priv = sw->priv;
if (priv->tick_id != 0)
{
gtk_widget_remove_tick_callback (GTK_WIDGET (sw), priv->tick_id);
priv->tick_id = 0;
}
}
static gboolean
gtk_switch_on_frame_clock_update (GtkWidget *widget,
GdkFrameClock *clock,
gpointer user_data)
{
GtkSwitch *sw = GTK_SWITCH (widget);
GtkSwitchPrivate *priv = sw->priv;
gtk_progress_tracker_advance_frame (&priv->tracker,
gdk_frame_clock_get_frame_time (clock));
if (gtk_progress_tracker_get_state (&priv->tracker) != GTK_PROGRESS_STATE_AFTER)
{
if (priv->is_active)
priv->handle_pos = 1.0 - gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE);
else
priv->handle_pos = gtk_progress_tracker_get_ease_out_cubic (&priv->tracker, FALSE);
}
else
{
gtk_switch_set_active (sw, !priv->is_active);
}
gtk_widget_queue_allocate (GTK_WIDGET (sw));
return G_SOURCE_CONTINUE;
}
#define ANIMATION_DURATION 100
static void
gtk_switch_begin_toggle_animation (GtkSwitch *sw)
{
GtkSwitchPrivate *priv = sw->priv;
if (gtk_settings_get_enable_animations (gtk_widget_get_settings (GTK_WIDGET (sw))))
{
gtk_progress_tracker_start (&priv->tracker, 1000 * ANIMATION_DURATION, 0, 1.0);
if (priv->tick_id == 0)
priv->tick_id = gtk_widget_add_tick_callback (GTK_WIDGET (sw),
gtk_switch_on_frame_clock_update,
NULL, NULL);
}
else
{
gtk_switch_set_active (sw, !priv->is_active);
}
}
static void
gtk_switch_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
gint n_press,
gdouble x,
gdouble y,
GtkSwitch *sw)
{
GtkSwitchPrivate *priv = sw->priv;
GtkAllocation allocation;
gtk_widget_get_allocation (GTK_WIDGET (sw), &allocation);
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
/* If the press didn't happen in the draggable handle,
* cancel the pan gesture right away
*/
if ((priv->is_active && x <= allocation.width / 2.0) ||
(!priv->is_active && x > allocation.width / 2.0))
gtk_gesture_set_state (priv->pan_gesture, GTK_EVENT_SEQUENCE_DENIED);
}
static void
gtk_switch_multipress_gesture_released (GtkGestureMultiPress *gesture,
gint n_press,
gdouble x,
gdouble y,
GtkSwitch *sw)
{
GtkSwitchPrivate *priv = sw->priv;
GdkEventSequence *sequence;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
if (priv->in_switch &&
gtk_gesture_handles_sequence (GTK_GESTURE (gesture), sequence))
gtk_switch_begin_toggle_animation (sw);
}
static void
gtk_switch_pan_gesture_pan (GtkGesturePan *gesture,
GtkPanDirection direction,
gdouble offset,
GtkSwitch *sw)
{
GtkWidget *widget = GTK_WIDGET (sw);
GtkSwitchPrivate *priv = sw->priv;
gint width;
if (direction == GTK_PAN_DIRECTION_LEFT)
offset = -offset;
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
width = gtk_widget_get_allocated_width (widget);
if (priv->is_active)
offset += width / 2;
offset /= width / 2;
/* constrain the handle within the trough width */
priv->handle_pos = CLAMP (offset, 0, 1.0);
/* we need to redraw the handle */
gtk_widget_queue_allocate (widget);
}
static void
gtk_switch_pan_gesture_drag_end (GtkGestureDrag *gesture,
gdouble x,
gdouble y,
GtkSwitch *sw)
{
GtkSwitchPrivate *priv = sw->priv;
GdkEventSequence *sequence;
GtkAllocation allocation;
gboolean active;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
if (gtk_gesture_get_sequence_state (GTK_GESTURE (gesture), sequence) == GTK_EVENT_SEQUENCE_CLAIMED)
{
gtk_widget_get_allocation (GTK_WIDGET (sw), &allocation);
/* if half the handle passed the middle of the switch, then we
* consider it to be on
*/
active = priv->handle_pos >= 0.5;
}
else if (!gtk_gesture_handles_sequence (priv->multipress_gesture, sequence))
active = priv->is_active;
else
return;
priv->handle_pos = active ? 1.0 : 0.0;
gtk_switch_set_active (sw, active);
gtk_widget_queue_allocate (GTK_WIDGET (sw));
}
static void
gtk_switch_create_pango_layouts (GtkSwitch *self)
{
GtkSwitchPrivate *priv = self->priv;
/* Glyphs for the ON state, in descending order of preference */
const char *on_glyphs[] = {
"⏽", /* U+23FD POWER ON SYMBOL */
"❙", /* U+2759 MEDIUM VERTICAL BAR */
};
/* Glyphs for the OFF state, in descending order of preference */
const char *off_glyphs[] = {
"⭘", /* U+2B58 HEAVY CIRCLE */
"○", /* U+25CB WHITE CIRCLE */
};
int i;
g_clear_object (&priv->on_layout);
for (i = 0; i < G_N_ELEMENTS (on_glyphs); i++)
{
PangoLayout *layout = gtk_widget_create_pango_layout (GTK_WIDGET (self), on_glyphs[i]);
if (pango_layout_get_unknown_glyphs_count (layout) == 0)
{
priv->on_layout = layout;
break;
}
g_object_unref (layout);
}
g_clear_object (&priv->off_layout);
for (i = 0; i < G_N_ELEMENTS (off_glyphs); i++)
{
PangoLayout *layout = gtk_widget_create_pango_layout (GTK_WIDGET (self), off_glyphs[i]);
if (pango_layout_get_unknown_glyphs_count (layout) == 0)
{
priv->off_layout = layout;
break;
}
g_object_unref (layout);
}
}
static void
gtk_switch_screen_changed (GtkWidget *widget,
GdkScreen *prev_screen)
{
gtk_switch_create_pango_layouts (GTK_SWITCH (widget));
}
static void
gtk_switch_style_updated (GtkWidget *widget)
{
GtkSwitch *self = GTK_SWITCH (widget);
GtkStyleContext *context;
GtkCssStyleChange *change;
GTK_WIDGET_CLASS (gtk_switch_parent_class)->style_updated (widget);
context = gtk_widget_get_style_context (widget);
change = gtk_style_context_get_change (context);
if (change == NULL || gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_FONT))
gtk_switch_create_pango_layouts (self);
}
static gboolean
gtk_switch_enter (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
if (event->window == priv->event_window)
{
priv->in_switch = TRUE;
gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_PRELIGHT, FALSE);
}
return FALSE;
}
static gboolean
gtk_switch_leave (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
if (event->window == priv->event_window)
{
priv->in_switch = FALSE;
gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_PRELIGHT);
}
return FALSE;
}
static void
gtk_switch_activate (GtkSwitch *sw)
{
gtk_switch_begin_toggle_animation (sw);
}
static void
gtk_switch_get_slider_size (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer unused)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
gdouble min_size;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
min_size = _gtk_css_number_value_get (gtk_css_style_get_value (gtk_css_gadget_get_style (gadget), GTK_CSS_PROPERTY_MIN_WIDTH), 100);
if (min_size > 0.0)
*minimum = 0;
else
gtk_widget_style_get (widget, "slider-width", minimum, NULL);
}
else
{
min_size = _gtk_css_number_value_get (gtk_css_style_get_value (gtk_css_gadget_get_style (gadget), GTK_CSS_PROPERTY_MIN_HEIGHT), 100);
if (min_size > 0.0)
*minimum = 0;
else
gtk_widget_style_get (widget, "slider-height", minimum, NULL);
}
*natural = *minimum;
}
static void
gtk_switch_get_content_size (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer unused)
{
GtkWidget *widget;
GtkSwitch *self;
GtkSwitchPrivate *priv;
gint slider_minimum, slider_natural;
PangoRectangle on_rect, off_rect;
widget = gtk_css_gadget_get_owner (gadget);
self = GTK_SWITCH (widget);
priv = self->priv;
gtk_css_gadget_get_preferred_size (priv->slider_gadget,
orientation,
-1,
&slider_minimum, &slider_natural,
NULL, NULL);
pango_layout_get_pixel_extents (priv->on_layout, NULL, &on_rect);
pango_layout_get_pixel_extents (priv->off_layout, NULL, &off_rect);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
int text_width = MAX (on_rect.width, off_rect.width);
*minimum = 2 * MAX (slider_minimum, text_width);
*natural = 2 * MAX (slider_natural, text_width);
}
else
{
int text_height = MAX (on_rect.height, off_rect.height);
*minimum = MAX (slider_minimum, text_height);
*natural = MAX (slider_natural, text_height);
}
}
static void
gtk_switch_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_css_gadget_get_preferred_size (GTK_SWITCH (widget)->priv->gadget,
GTK_ORIENTATION_HORIZONTAL,
-1,
minimum, natural,
NULL, NULL);
}
static void
gtk_switch_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_css_gadget_get_preferred_size (GTK_SWITCH (widget)->priv->gadget,
GTK_ORIENTATION_VERTICAL,
-1,
minimum, natural,
NULL, NULL);
}
static void
gtk_switch_allocate_contents (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer unused)
{
GtkSwitch *self = GTK_SWITCH (gtk_css_gadget_get_owner (gadget));
GtkSwitchPrivate *priv = self->priv;
GtkAllocation slider_alloc;
slider_alloc.x = allocation->x + round (priv->handle_pos * (allocation->width - allocation->width / 2));
slider_alloc.y = allocation->y;
slider_alloc.width = allocation->width / 2;
slider_alloc.height = allocation->height;
gtk_css_gadget_allocate (priv->slider_gadget,
&slider_alloc,
baseline,
out_clip);
if (gtk_widget_get_realized (GTK_WIDGET (self)))
{
GtkAllocation border_allocation;
gtk_css_gadget_get_border_allocation (gadget, &border_allocation, NULL);
gdk_window_move_resize (priv->event_window,
border_allocation.x,
border_allocation.y,
border_allocation.width,
border_allocation.height);
}
}
static void
gtk_switch_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkAllocation clip;
gtk_widget_set_allocation (widget, allocation);
gtk_css_gadget_allocate (priv->gadget,
allocation,
gtk_widget_get_allocated_baseline (widget),
&clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_switch_realize (GtkWidget *widget)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GdkWindow *parent_window;
GdkWindowAttr attributes;
gint attributes_mask;
GtkAllocation allocation;
gtk_widget_set_realized (widget, TRUE);
parent_window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, parent_window);
g_object_ref (parent_window);
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.wclass = GDK_INPUT_ONLY;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_POINTER_MOTION_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y;
priv->event_window = gdk_window_new (parent_window,
&attributes,
attributes_mask);
gtk_widget_register_window (widget, priv->event_window);
}
static void
gtk_switch_unrealize (GtkWidget *widget)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
if (priv->event_window != NULL)
{
gtk_widget_unregister_window (widget, priv->event_window);
gdk_window_destroy (priv->event_window);
priv->event_window = NULL;
}
GTK_WIDGET_CLASS (gtk_switch_parent_class)->unrealize (widget);
}
static void
gtk_switch_map (GtkWidget *widget)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GTK_WIDGET_CLASS (gtk_switch_parent_class)->map (widget);
if (priv->event_window)
gdk_window_show (priv->event_window);
}
static void
gtk_switch_unmap (GtkWidget *widget)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
if (priv->event_window)
gdk_window_hide (priv->event_window);
GTK_WIDGET_CLASS (gtk_switch_parent_class)->unmap (widget);
}
static gboolean
gtk_switch_render_slider (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer data)
{
return gtk_widget_has_visible_focus (gtk_css_gadget_get_owner (gadget));
}
static gboolean
gtk_switch_render_trough (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer data)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkStyleContext *context = gtk_widget_get_style_context (widget);
PangoRectangle rect;
gint label_x, label_y;
pango_layout_get_pixel_extents (priv->on_layout, NULL, &rect);
label_x = x + ((width / 2) - rect.width) / 2;
label_y = y + (height - rect.height) / 2;
gtk_render_layout (context, cr, label_x, label_y, priv->on_layout);
pango_layout_get_pixel_extents (priv->off_layout, NULL, &rect);
label_x = x + (width / 2) + ((width / 2) - rect.width) / 2;
label_y = y + (height - rect.height) / 2;
gtk_render_layout (context, cr, label_x, label_y, priv->off_layout);
gtk_css_gadget_draw (priv->slider_gadget, cr);
return FALSE;
}
static gboolean
gtk_switch_draw (GtkWidget *widget,
cairo_t *cr)
{
gtk_css_gadget_draw (GTK_SWITCH (widget)->priv->gadget, cr);
return FALSE;
}
static void
gtk_switch_set_related_action (GtkSwitch *sw,
GtkAction *action)
{
GtkSwitchPrivate *priv = sw->priv;
if (priv->action == action)
return;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (sw), action);
G_GNUC_END_IGNORE_DEPRECATIONS;
priv->action = action;
}
static void
gtk_switch_set_use_action_appearance (GtkSwitch *sw,
gboolean use_appearance)
{
GtkSwitchPrivate *priv = sw->priv;
if (priv->use_action_appearance != use_appearance)
{
priv->use_action_appearance = use_appearance;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_activatable_sync_action_properties (GTK_ACTIVATABLE (sw), priv->action);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
}
static void
gtk_switch_set_action_name (GtkActionable *actionable,
const gchar *action_name)
{
GtkSwitch *sw = GTK_SWITCH (actionable);
if (!sw->priv->action_helper)
sw->priv->action_helper = gtk_action_helper_new (actionable);
gtk_action_helper_set_action_name (sw->priv->action_helper, action_name);
}
static void
gtk_switch_set_action_target_value (GtkActionable *actionable,
GVariant *action_target)
{
GtkSwitch *sw = GTK_SWITCH (actionable);
if (!sw->priv->action_helper)
sw->priv->action_helper = gtk_action_helper_new (actionable);
gtk_action_helper_set_action_target_value (sw->priv->action_helper, action_target);
}
static const gchar *
gtk_switch_get_action_name (GtkActionable *actionable)
{
GtkSwitch *sw = GTK_SWITCH (actionable);
return gtk_action_helper_get_action_name (sw->priv->action_helper);
}
static GVariant *
gtk_switch_get_action_target_value (GtkActionable *actionable)
{
GtkSwitch *sw = GTK_SWITCH (actionable);
return gtk_action_helper_get_action_target_value (sw->priv->action_helper);
}
static void
gtk_switch_actionable_iface_init (GtkActionableInterface *iface)
{
iface->get_action_name = gtk_switch_get_action_name;
iface->set_action_name = gtk_switch_set_action_name;
iface->get_action_target_value = gtk_switch_get_action_target_value;
iface->set_action_target_value = gtk_switch_set_action_target_value;
}
static void
gtk_switch_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkSwitch *sw = GTK_SWITCH (gobject);
switch (prop_id)
{
case PROP_ACTIVE:
gtk_switch_set_active (sw, g_value_get_boolean (value));
break;
case PROP_STATE:
gtk_switch_set_state (sw, g_value_get_boolean (value));
break;
case PROP_RELATED_ACTION:
gtk_switch_set_related_action (sw, g_value_get_object (value));
break;
case PROP_USE_ACTION_APPEARANCE:
gtk_switch_set_use_action_appearance (sw, g_value_get_boolean (value));
break;
case PROP_ACTION_NAME:
gtk_switch_set_action_name (GTK_ACTIONABLE (sw), g_value_get_string (value));
break;
case PROP_ACTION_TARGET:
gtk_switch_set_action_target_value (GTK_ACTIONABLE (sw), g_value_get_variant (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
gtk_switch_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkSwitchPrivate *priv = GTK_SWITCH (gobject)->priv;
switch (prop_id)
{
case PROP_ACTIVE:
g_value_set_boolean (value, priv->is_active);
break;
case PROP_STATE:
g_value_set_boolean (value, priv->state);
break;
case PROP_RELATED_ACTION:
g_value_set_object (value, priv->action);
break;
case PROP_USE_ACTION_APPEARANCE:
g_value_set_boolean (value, priv->use_action_appearance);
break;
case PROP_ACTION_NAME:
g_value_set_string (value, gtk_action_helper_get_action_name (priv->action_helper));
break;
case PROP_ACTION_TARGET:
g_value_set_variant (value, gtk_action_helper_get_action_target_value (priv->action_helper));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
gtk_switch_dispose (GObject *object)
{
GtkSwitchPrivate *priv = GTK_SWITCH (object)->priv;
g_clear_object (&priv->action_helper);
if (priv->action)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (object), NULL);
G_GNUC_END_IGNORE_DEPRECATIONS;
priv->action = NULL;
}
g_clear_object (&priv->gadget);
g_clear_object (&priv->slider_gadget);
g_clear_object (&priv->pan_gesture);
g_clear_object (&priv->multipress_gesture);
g_clear_object (&priv->on_layout);
g_clear_object (&priv->off_layout);
G_OBJECT_CLASS (gtk_switch_parent_class)->dispose (object);
}
static void
gtk_switch_finalize (GObject *object)
{
gtk_switch_end_toggle_animation (GTK_SWITCH (object));
G_OBJECT_CLASS (gtk_switch_parent_class)->finalize (object);
}
static gboolean
state_set (GtkSwitch *sw, gboolean state)
{
if (sw->priv->action_helper)
gtk_action_helper_activate (sw->priv->action_helper);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
if (sw->priv->action)
gtk_action_activate (sw->priv->action);
G_GNUC_END_IGNORE_DEPRECATIONS;
gtk_switch_set_state (sw, state);
return TRUE;
}
static void
gtk_switch_class_init (GtkSwitchClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gpointer activatable_iface;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
activatable_iface = g_type_default_interface_peek (GTK_TYPE_ACTIVATABLE);
G_GNUC_END_IGNORE_DEPRECATIONS;
switch_props[PROP_RELATED_ACTION] =
g_param_spec_override ("related-action",
g_object_interface_find_property (activatable_iface,
"related-action"));
switch_props[PROP_USE_ACTION_APPEARANCE] =
g_param_spec_override ("use-action-appearance",
g_object_interface_find_property (activatable_iface,
"use-action-appearance"));
/**
* GtkSwitch:active:
*
* Whether the #GtkSwitch widget is in its on or off state.
*/
switch_props[PROP_ACTIVE] =
g_param_spec_boolean ("active",
P_("Active"),
P_("Whether the switch is on or off"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkSwitch:state:
*
* The backend state that is controlled by the switch.
* See #GtkSwitch::state-set for details.
*
* Since: 3.14
*/
switch_props[PROP_STATE] =
g_param_spec_boolean ("state",
P_("State"),
P_("The backend state"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
gobject_class->set_property = gtk_switch_set_property;
gobject_class->get_property = gtk_switch_get_property;
gobject_class->dispose = gtk_switch_dispose;
gobject_class->finalize = gtk_switch_finalize;
g_object_class_install_properties (gobject_class, LAST_PROP, switch_props);
widget_class->get_preferred_width = gtk_switch_get_preferred_width;
widget_class->get_preferred_height = gtk_switch_get_preferred_height;
widget_class->size_allocate = gtk_switch_size_allocate;
widget_class->realize = gtk_switch_realize;
widget_class->unrealize = gtk_switch_unrealize;
widget_class->map = gtk_switch_map;
widget_class->unmap = gtk_switch_unmap;
widget_class->draw = gtk_switch_draw;
widget_class->enter_notify_event = gtk_switch_enter;
widget_class->leave_notify_event = gtk_switch_leave;
widget_class->screen_changed = gtk_switch_screen_changed;
widget_class->style_updated = gtk_switch_style_updated;
klass->activate = gtk_switch_activate;
klass->state_set = state_set;
/**
* GtkSwitch:slider-width:
*
* The minimum width of the #GtkSwitch handle, in pixels.
*
* Deprecated: 3.20: Use the CSS min-width property instead.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("slider-width",
P_("Slider Width"),
P_("The minimum width of the handle"),
DEFAULT_SLIDER_WIDTH, G_MAXINT,
DEFAULT_SLIDER_WIDTH,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkSwitch:slider-height:
*
* The minimum height of the #GtkSwitch handle, in pixels.
*
* Since: 3.18
*
* Deprecated: 3.20: Use the CSS min-height property instead.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("slider-height",
P_("Slider Height"),
P_("The minimum height of the handle"),
DEFAULT_SLIDER_HEIGHT, G_MAXINT,
DEFAULT_SLIDER_HEIGHT,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkSwitch::activate:
* @widget: the object which received the signal.
*
* The ::activate signal on GtkSwitch is an action signal and
* emitting it causes the switch to animate.
* Applications should never connect to this signal, but use the
* notify::active signal.
*/
signals[ACTIVATE] =
g_signal_new (I_("activate"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkSwitchClass, activate),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
widget_class->activate_signal = signals[ACTIVATE];
/**
* GtkSwitch::state-set:
* @widget: the object on which the signal was emitted
* @state: the new state of the switch
*
* The ::state-set signal on GtkSwitch is emitted to change the underlying
* state. It is emitted when the user changes the switch position. The
* default handler keeps the state in sync with the #GtkSwitch:active
* property.
*
* To implement delayed state change, applications can connect to this signal,
* initiate the change of the underlying state, and call gtk_switch_set_state()
* when the underlying state change is complete. The signal handler should
* return %TRUE to prevent the default handler from running.
*
* Visually, the underlying state is represented by the trough color of
* the switch, while the #GtkSwitch:active property is represented by the
* position of the switch.
*
* Returns: %TRUE to stop the signal emission
*
* Since: 3.14
*/
signals[STATE_SET] =
g_signal_new (I_("state-set"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkSwitchClass, state_set),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOOLEAN,
G_TYPE_BOOLEAN, 1,
G_TYPE_BOOLEAN);
g_object_class_override_property (gobject_class, PROP_ACTION_NAME, "action-name");
g_object_class_override_property (gobject_class, PROP_ACTION_TARGET, "action-target");
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SWITCH_ACCESSIBLE);
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_TOGGLE_BUTTON);
gtk_widget_class_set_css_name (widget_class, "switch");
}
static void
gtk_switch_init (GtkSwitch *self)
{
GtkSwitchPrivate *priv;
GtkGesture *gesture;
GtkCssNode *widget_node;
priv = self->priv = gtk_switch_get_instance_private (self);
priv->use_action_appearance = TRUE;
gtk_widget_set_has_window (GTK_WIDGET (self), FALSE);
gtk_widget_set_can_focus (GTK_WIDGET (self), TRUE);
widget_node = gtk_widget_get_css_node (GTK_WIDGET (self));
priv->gadget = gtk_css_custom_gadget_new_for_node (widget_node,
GTK_WIDGET (self),
gtk_switch_get_content_size,
gtk_switch_allocate_contents,
gtk_switch_render_trough,
NULL,
NULL);
priv->slider_gadget = gtk_css_custom_gadget_new ("slider",
GTK_WIDGET (self),
priv->gadget,
NULL,
gtk_switch_get_slider_size,
NULL,
gtk_switch_render_slider,
NULL,
NULL);
gesture = gtk_gesture_multi_press_new (GTK_WIDGET (self));
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (gesture), FALSE);
gtk_gesture_single_set_exclusive (GTK_GESTURE_SINGLE (gesture), TRUE);
g_signal_connect (gesture, "pressed",
G_CALLBACK (gtk_switch_multipress_gesture_pressed), self);
g_signal_connect (gesture, "released",
G_CALLBACK (gtk_switch_multipress_gesture_released), self);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (gesture),
GTK_PHASE_BUBBLE);
priv->multipress_gesture = gesture;
gesture = gtk_gesture_pan_new (GTK_WIDGET (self),
GTK_ORIENTATION_HORIZONTAL);
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (gesture), FALSE);
gtk_gesture_single_set_exclusive (GTK_GESTURE_SINGLE (gesture), TRUE);
g_signal_connect (gesture, "pan",
G_CALLBACK (gtk_switch_pan_gesture_pan), self);
g_signal_connect (gesture, "drag-end",
G_CALLBACK (gtk_switch_pan_gesture_drag_end), self);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (gesture),
GTK_PHASE_BUBBLE);
priv->pan_gesture = gesture;
gtk_switch_create_pango_layouts (self);
}
/**
* gtk_switch_new:
*
* Creates a new #GtkSwitch widget.
*
* Returns: the newly created #GtkSwitch instance
*
* Since: 3.0
*/
GtkWidget *
gtk_switch_new (void)
{
return g_object_new (GTK_TYPE_SWITCH, NULL);
}
/**
* gtk_switch_set_active:
* @sw: a #GtkSwitch
* @is_active: %TRUE if @sw should be active, and %FALSE otherwise
*
* Changes the state of @sw to the desired one.
*
* Since: 3.0
*/
void
gtk_switch_set_active (GtkSwitch *sw,
gboolean is_active)
{
GtkSwitchPrivate *priv;
g_return_if_fail (GTK_IS_SWITCH (sw));
gtk_switch_end_toggle_animation (sw);
is_active = !!is_active;
priv = sw->priv;
if (priv->is_active != is_active)
{
AtkObject *accessible;
gboolean handled;
priv->is_active = is_active;
if (priv->is_active)
priv->handle_pos = 1.0;
else
priv->handle_pos = 0.0;
g_signal_emit (sw, signals[STATE_SET], 0, is_active, &handled);
g_object_notify_by_pspec (G_OBJECT (sw), switch_props[PROP_ACTIVE]);
accessible = gtk_widget_get_accessible (GTK_WIDGET (sw));
atk_object_notify_state_change (accessible, ATK_STATE_CHECKED, priv->is_active);
gtk_widget_queue_allocate (GTK_WIDGET (sw));
}
}
/**
* gtk_switch_get_active:
* @sw: a #GtkSwitch
*
* Gets whether the #GtkSwitch is in its “on” or “off” state.
*
* Returns: %TRUE if the #GtkSwitch is active, and %FALSE otherwise
*
* Since: 3.0
*/
gboolean
gtk_switch_get_active (GtkSwitch *sw)
{
g_return_val_if_fail (GTK_IS_SWITCH (sw), FALSE);
return sw->priv->is_active;
}
/**
* gtk_switch_set_state:
* @sw: a #GtkSwitch
* @state: the new state
*
* Sets the underlying state of the #GtkSwitch.
*
* Normally, this is the same as #GtkSwitch:active, unless the switch
* is set up for delayed state changes. This function is typically
* called from a #GtkSwitch::state-set signal handler.
*
* See #GtkSwitch::state-set for details.
*
* Since: 3.14
*/
void
gtk_switch_set_state (GtkSwitch *sw,
gboolean state)
{
g_return_if_fail (GTK_IS_SWITCH (sw));
state = state != FALSE;
if (sw->priv->state == state)
return;
sw->priv->state = state;
/* This will be a no-op if we're switching the state in response
* to a UI change. We're setting active anyway, to catch 'spontaneous'
* state changes.
*/
gtk_switch_set_active (sw, state);
if (state)
gtk_widget_set_state_flags (GTK_WIDGET (sw), GTK_STATE_FLAG_CHECKED, FALSE);
else
gtk_widget_unset_state_flags (GTK_WIDGET (sw), GTK_STATE_FLAG_CHECKED);
g_object_notify (G_OBJECT (sw), "state");
}
/**
* gtk_switch_get_state:
* @sw: a #GtkSwitch
*
* Gets the underlying state of the #GtkSwitch.
*
* Returns: the underlying state
*
* Since: 3.14
*/
gboolean
gtk_switch_get_state (GtkSwitch *sw)
{
g_return_val_if_fail (GTK_IS_SWITCH (sw), FALSE);
return sw->priv->state;
}
static void
gtk_switch_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
if (strcmp (property_name, "visible") == 0)
{
if (gtk_action_is_visible (action))
gtk_widget_show (GTK_WIDGET (activatable));
else
gtk_widget_hide (GTK_WIDGET (activatable));
}
else if (strcmp (property_name, "sensitive") == 0)
{
gtk_widget_set_sensitive (GTK_WIDGET (activatable), gtk_action_is_sensitive (action));
}
else if (strcmp (property_name, "active") == 0)
{
gtk_action_block_activate (action);
gtk_switch_set_active (GTK_SWITCH (activatable), gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action)));
gtk_action_unblock_activate (action);
}
G_GNUC_END_IGNORE_DEPRECATIONS;
}
static void
gtk_switch_sync_action_properties (GtkActivatable *activatable,
GtkAction *action)
{
if (!action)
return;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
if (gtk_action_is_visible (action))
gtk_widget_show (GTK_WIDGET (activatable));
else
gtk_widget_hide (GTK_WIDGET (activatable));
gtk_widget_set_sensitive (GTK_WIDGET (activatable), gtk_action_is_sensitive (action));
gtk_action_block_activate (action);
gtk_switch_set_active (GTK_SWITCH (activatable), gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action)));
gtk_action_unblock_activate (action);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
static void
gtk_switch_activatable_interface_init (GtkActivatableIface *iface)
{
iface->update = gtk_switch_update;
iface->sync_action_properties = gtk_switch_sync_action_properties;
}
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