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gtk2/gtk/gtkswitch.c
Benjamin Otte ddbd71e22a switch: Remove unneeded checks 
Size vfuncs always get non-null out variables passed, so no need to
check for NULL.
2014-05-01 14:51:28 +02:00

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/* 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.
*/
#include "config.h"
#include "gtkswitch.h"
#include "deprecated/gtkactivatable.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "deprecated/gtktoggleaction.h"
#include "gtkwidget.h"
#include "gtkmarshalers.h"
#include "gtkapplicationprivate.h"
#include "gtkactionable.h"
#include "a11y/gtkswitchaccessible.h"
#include "gtkactionhelper.h"
#include <math.h>
#define DEFAULT_SLIDER_WIDTH (36)
struct _GtkSwitchPrivate
{
GdkWindow *event_window;
GtkAction *action;
GtkActionHelper *action_helper;
gint handle_x;
gint offset;
gint drag_start;
gint drag_threshold;
guint state : 1;
guint is_active : 1;
guint is_dragging : 1;
guint in_press : 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 gboolean
gtk_switch_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkAllocation allocation;
/* Don't handle extra mouse buttons events, let them bubble up */
if (event->button > 5)
return GDK_EVENT_PROPAGATE;
gtk_widget_get_allocation (widget, &allocation);
if (priv->is_active)
{
/* if the event occurred in the "off" area, then this
* is a direct toggle
*/
if (event->x <= allocation.width / 2)
{
priv->in_press = TRUE;
return GDK_EVENT_STOP;
}
priv->offset = event->x - allocation.width / 2;
}
else
{
/* if the event occurred in the "on" area, then this
* is a direct toggle
*/
if (event->x >= allocation.width / 2)
{
priv->in_press = TRUE;
return GDK_EVENT_STOP;
}
priv->offset = event->x;
}
priv->drag_start = event->x;
g_object_get (gtk_widget_get_settings (widget),
"gtk-dnd-drag-threshold", &priv->drag_threshold,
NULL);
return GDK_EVENT_STOP;
}
static gboolean
gtk_switch_motion (GtkWidget *widget,
GdkEventMotion *event)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
/* if this is a direct toggle we don't handle motion */
if (priv->in_press)
return GDK_EVENT_PROPAGATE;
if (ABS (event->x - priv->drag_start) < priv->drag_threshold)
return GDK_EVENT_STOP;
if (event->state & GDK_BUTTON1_MASK)
{
gint position = event->x - priv->offset;
GtkAllocation allocation;
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
gint width, focus_width, focus_pad;
gtk_widget_style_get (widget,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
NULL);
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
gtk_style_context_get_padding (context, state, &padding);
gtk_style_context_restore (context);
gtk_widget_get_allocation (widget, &allocation);
width = allocation.width - 2 * (focus_width + focus_pad);
/* constrain the handle within the trough width */
if (position > (width / 2) - padding.right)
priv->handle_x = width / 2 - padding.right;
else if (position < padding.left)
priv->handle_x = 0;
else
priv->handle_x = position;
priv->is_dragging = TRUE;
/* we need to redraw the handle */
gtk_widget_queue_draw (widget);
return GDK_EVENT_STOP;
}
return GDK_EVENT_PROPAGATE;
}
static gboolean
gtk_switch_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkAllocation allocation;
/* Don't handle extra mouse buttons events, let them bubble up */
if (event->button > 5)
return GDK_EVENT_PROPAGATE;
gtk_widget_get_allocation (widget, &allocation);
/* dragged toggles have a "soft" grab, so we don't care whether we
* are in the switch or not when the button is released; we do care
* for direct toggles, instead
*/
if (!priv->is_dragging && !priv->in_switch)
return GDK_EVENT_PROPAGATE;
/* direct toggle */
if (priv->in_press)
{
priv->in_press = FALSE;
gtk_switch_set_active (GTK_SWITCH (widget), !priv->is_active);
return GDK_EVENT_STOP;
}
/* toggle the switch if the handle was clicked but a drag had not been
* initiated */
if (!priv->is_dragging && !priv->in_press)
{
gtk_switch_set_active (GTK_SWITCH (widget), !priv->is_active);
return GDK_EVENT_STOP;
}
/* dragged toggle */
if (priv->is_dragging)
{
priv->is_dragging = FALSE;
/* if half the handle passed the middle of the switch, then we
* consider it to be on
*/
if ((priv->handle_x + (allocation.width / 4)) >= (allocation.width / 2))
{
gtk_switch_set_active (GTK_SWITCH (widget), TRUE);
priv->handle_x = allocation.width / 2;
}
else
{
gtk_switch_set_active (GTK_SWITCH (widget), FALSE);
priv->handle_x = 0;
}
gtk_widget_queue_draw (widget);
return GDK_EVENT_STOP;
}
return GDK_EVENT_PROPAGATE;
}
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;
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;
return FALSE;
}
static void
gtk_switch_activate (GtkSwitch *sw)
{
GtkSwitchPrivate *priv = sw->priv;
gtk_switch_set_active (sw, !priv->is_active);
}
static void
gtk_switch_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
gint width, slider_width, focus_width, focus_pad;
PangoLayout *layout;
PangoRectangle logical_rect;
context = gtk_widget_get_style_context (widget);
state = gtk_style_context_get_state (context);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
gtk_style_context_get_padding (context, state, &padding);
width = padding.left + padding.right;
gtk_style_context_restore (context);
gtk_widget_style_get (widget,
"slider-width", &slider_width,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
NULL);
slider_width = MAX (slider_width, 3 * (focus_width + focus_pad));
/* Translators: if the "on" state label requires more than three
* glyphs then use MEDIUM VERTICAL BAR (U+2759) as the text for
* the state
*/
layout = gtk_widget_create_pango_layout (widget, C_("switch", "ON"));
pango_layout_get_extents (layout, NULL, &logical_rect);
pango_extents_to_pixels (&logical_rect, NULL);
width += MAX (logical_rect.width, slider_width);
/* Translators: if the "off" state label requires more than three
* glyphs then use WHITE CIRCLE (U+25CB) as the text for the state
*/
pango_layout_set_text (layout, C_("switch", "OFF"), -1);
pango_layout_get_extents (layout, NULL, &logical_rect);
pango_extents_to_pixels (&logical_rect, NULL);
width += MAX (logical_rect.width, slider_width);
g_object_unref (layout);
*minimum = width;
*natural = width;
}
static void
gtk_switch_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
gint height, focus_width, focus_pad, slider_width, min_height;
PangoLayout *layout;
PangoRectangle logical_rect;
gchar *str;
context = gtk_widget_get_style_context (widget);
state = gtk_style_context_get_state (context);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
gtk_style_context_get_padding (context, state, &padding);
height = padding.top + padding.bottom;
gtk_style_context_restore (context);
gtk_widget_style_get (widget,
"slider-width", &slider_width,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
NULL);
min_height = MAX (slider_width * 0.6, 3 * (focus_width + focus_pad));
str = g_strdup_printf ("%s%s",
C_("switch", "ON"),
C_("switch", "OFF"));
layout = gtk_widget_create_pango_layout (widget, str);
pango_layout_get_extents (layout, NULL, &logical_rect);
pango_extents_to_pixels (&logical_rect, NULL);
height += MAX (min_height, logical_rect.height);
g_object_unref (layout);
g_free (str);
*minimum = height;
*natural = height;
}
static void
gtk_switch_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
gtk_widget_set_allocation (widget, allocation);
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (priv->event_window,
allocation->x,
allocation->y,
allocation->width,
allocation->height);
}
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_HINT_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 inline void
gtk_switch_paint_handle (GtkWidget *widget,
cairo_t *cr,
GdkRectangle *box)
{
GtkStyleContext *context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
gtk_render_slider (context, cr,
box->x, box->y,
box->width, box->height,
GTK_ORIENTATION_HORIZONTAL);
gtk_style_context_restore (context);
}
static gboolean
gtk_switch_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkStyleContext *context;
GdkRectangle handle;
PangoLayout *layout;
PangoRectangle rect;
gint label_x, label_y;
GtkBorder padding;
GtkStateFlags state;
gint x, y, width, height;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SLIDER);
gtk_style_context_get_padding (context, state, &padding);
gtk_style_context_restore (context);
x = 0;
y = 0;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
gtk_render_background (context, cr, x, y, width, height);
gtk_render_frame (context, cr, x, y, width, height);
width -= padding.left + padding.right;
height -= padding.top + padding.bottom;
x += padding.left;
y += padding.top;
handle.y = y;
handle.width = width / 2;
handle.height = height;
/* Translators: if the "on" state label requires more than three
* glyphs then use MEDIUM VERTICAL BAR (U+2759) as the text for
* the state
*/
layout = gtk_widget_create_pango_layout (widget, C_("switch", "ON"));
pango_layout_get_extents (layout, NULL, &rect);
pango_extents_to_pixels (&rect, NULL);
label_x = x + ((width / 2) - rect.width) / 2;
label_y = y + (height - rect.height) / 2;
gtk_render_layout (context, cr, label_x, label_y, layout);
g_object_unref (layout);
/* Translators: if the "off" state label requires more than three
* glyphs then use WHITE CIRCLE (U+25CB) as the text for the state
*/
layout = gtk_widget_create_pango_layout (widget, C_("switch", "OFF"));
pango_layout_get_extents (layout, NULL, &rect);
pango_extents_to_pixels (&rect, NULL);
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, layout);
g_object_unref (layout);
if (priv->is_dragging)
handle.x = x + priv->handle_x;
else if (priv->is_active)
handle.x = x + width - handle.width;
else
handle.x = x;
gtk_style_context_restore (context);
gtk_switch_paint_handle (widget, cr, &handle);
if (gtk_widget_has_visible_focus (widget))
{
gint focus_width, focus_pad, pad;
gtk_widget_style_get (widget,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
NULL);
pad = focus_pad + focus_width;
gtk_render_focus (context, cr,
handle.x + pad, handle.y + pad,
handle.width - pad*2, handle.height - pad*2);
}
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_OBJECT_CLASS (gtk_switch_parent_class)->dispose (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);
/**
* 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);
gobject_class->set_property = gtk_switch_set_property;
gobject_class->get_property = gtk_switch_get_property;
gobject_class->dispose = gtk_switch_dispose;
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->button_press_event = gtk_switch_button_press;
widget_class->button_release_event = gtk_switch_button_release;
widget_class->motion_notify_event = gtk_switch_motion;
widget_class->enter_notify_event = gtk_switch_enter;
widget_class->leave_notify_event = gtk_switch_leave;
klass->activate = gtk_switch_activate;
klass->state_set = state_set;
/**
* GtkSwitch:slider-width:
*
* The minimum width of the #GtkSwitch handle, in pixels.
*/
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));
/**
* 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,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_class->activate_signal = signals[ACTIVATE];
/**
* GtkSwitch::state-set:
* @widget: the object on which the signal was emitted
*
* 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 #GtkState: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);
}
static void
gtk_switch_init (GtkSwitch *self)
{
self->priv = gtk_switch_get_instance_private (self);
self->priv->use_action_appearance = TRUE;
gtk_widget_set_has_window (GTK_WIDGET (self), FALSE);
gtk_widget_set_can_focus (GTK_WIDGET (self), TRUE);
}
/**
* 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));
is_active = !!is_active;
priv = sw->priv;
if (priv->is_active != is_active)
{
AtkObject *accessible;
gboolean handled;
priv->is_active = is_active;
g_object_notify_by_pspec (G_OBJECT (sw), switch_props[PROP_ACTIVE]);
g_signal_emit (sw, signals[STATE_SET], 0, is_active, &handled);
accessible = gtk_widget_get_accessible (GTK_WIDGET (sw));
atk_object_notify_state_change (accessible, ATK_STATE_CHECKED, priv->is_active);
gtk_widget_queue_draw (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_ACTIVE, FALSE);
else
gtk_widget_unset_state_flags (GTK_WIDGET (sw), GTK_STATE_FLAG_ACTIVE);
g_object_notify (G_OBJECT (sw), "state");
gtk_widget_queue_draw (GTK_WIDGET (sw));
}
/**
* 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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