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gtk2/gtk/gtkswitch.c
Cosimo Cecchi 6c3c26d9c3 switch: hardcode a smaller font size for the switch label 
This should not really be done here, but we can't override font size
from the theme just yet.

https://bugzilla.gnome.org/show_bug.cgi?id=645458
2011-03-23 10:00:01 -04:00

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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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* 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.
*/
#include "config.h"
#include "gtkswitch.h"
#include "gtkaccessibleprivate.h"
#include "gtkactivatable.h"
#include "gtkintl.h"
#include "gtkstyle.h"
#include "gtkprivate.h"
#include "gtktoggleaction.h"
#include "gtkwidget.h"
#include "gtkmarshalers.h"
#include <math.h>
#define DEFAULT_SLIDER_WIDTH (36)
#define DEFAULT_SLIDER_HEIGHT (22)
struct _GtkSwitchPrivate
{
GdkWindow *event_window;
GtkAction *action;
gint handle_x;
gint offset;
gint drag_start;
gint drag_threshold;
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_RELATED_ACTION,
PROP_USE_ACTION_APPEARANCE,
LAST_PROP
};
enum
{
ACTIVATE,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static GParamSpec *switch_props[LAST_PROP] = { NULL, };
static GType gtk_switch_accessible_factory_get_type (void);
static void gtk_switch_activatable_interface_init (GtkActivatableIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkSwitch, gtk_switch, GTK_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACTIVATABLE,
gtk_switch_activatable_interface_init));
static gboolean
gtk_switch_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkAllocation allocation;
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 FALSE;
}
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 FALSE;
}
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 FALSE;
}
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 FALSE;
if (ABS (event->x - priv->drag_start) < priv->drag_threshold)
return TRUE;
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 TRUE;
}
return FALSE;
}
static gboolean
gtk_switch_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkAllocation allocation;
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 FALSE;
/* direct toggle */
if (priv->in_press)
{
priv->in_press = FALSE;
gtk_switch_set_active (GTK_SWITCH (widget), !priv->is_active);
return TRUE;
}
/* 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 TRUE;
}
/* 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 TRUE;
}
return FALSE;
}
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)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
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_widget_get_state_flags (widget);
if (priv->is_active)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
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);
width += 2 * (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);
if (minimum)
*minimum = width;
if (natural)
*natural = width;
}
static void
gtk_switch_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
gint height, focus_width, focus_pad;
PangoLayout *layout;
PangoRectangle logical_rect;
gchar *str;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
if (priv->is_active)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
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,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
NULL);
height += 2 * (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 (DEFAULT_SLIDER_HEIGHT, logical_rect.height);
g_object_unref (layout);
g_free (str);
if (minimum)
*minimum = height;
if (natural)
*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);
gdk_window_set_user_data (priv->event_window, widget);
}
static void
gtk_switch_unrealize (GtkWidget *widget)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
if (priv->event_window != NULL)
{
gdk_window_set_user_data (priv->event_window, NULL);
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)
{
GtkSwitchPrivate *priv = GTK_SWITCH (widget)->priv;
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkStateFlags state;
state = gtk_widget_get_state_flags (widget);
if (priv->is_active)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
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;
PangoFontDescription *desc;
const PangoFontDescription *style_desc;
PangoRectangle rect;
gint label_x, label_y;
GtkStateFlags state;
GtkBorder padding;
gint focus_width, focus_pad;
gint x, y, width, height;
gint font_size, style_font_size;
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);
if (priv->is_active)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
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);
if (gtk_widget_has_focus (widget))
gtk_render_focus (context, cr, x, y, width, height);
x += focus_width + focus_pad;
y += focus_width + focus_pad;
width -= 2 * (focus_width + focus_pad);
height -= 2 * (focus_width + focus_pad);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
gtk_style_context_set_state (context, state);
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"));
/* FIXME: this should be really done in the theme, but overriding font size
* from it doesn't currently work. So we have to hardcode this here and
* below for the "OFF" label.
*/
desc = pango_font_description_new ();
style_desc = gtk_style_context_get_font (context, state);
style_font_size = pango_font_description_get_size (style_desc);
font_size = MAX (style_font_size - 1 * PANGO_SCALE, ceil (style_font_size * PANGO_SCALE_SMALL));
pango_font_description_set_size (desc, font_size);
pango_layout_set_font_description (layout, desc);
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_set_font_description (layout, desc);
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);
pango_font_description_free (desc);
return FALSE;
}
static AtkObject *
gtk_switch_get_accessible (GtkWidget *widget)
{
static gboolean first_time = TRUE;
if (G_UNLIKELY (first_time))
{
_gtk_accessible_set_factory_type (GTK_TYPE_SWITCH,
gtk_switch_accessible_factory_get_type ());
first_time = FALSE;
}
return GTK_WIDGET_CLASS (gtk_switch_parent_class)->get_accessible (widget);
}
static void
gtk_switch_set_related_action (GtkSwitch *sw,
GtkAction *action)
{
GtkSwitchPrivate *priv = sw->priv;
if (priv->action == action)
return;
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (sw), action);
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;
gtk_activatable_sync_action_properties (GTK_ACTIVATABLE (sw), priv->action);
}
}
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_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;
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_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;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
gtk_switch_dispose (GObject *object)
{
GtkSwitchPrivate *priv = GTK_SWITCH (object)->priv;
if (priv->action)
{
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (object), NULL);
priv->action = NULL;
}
G_OBJECT_CLASS (gtk_switch_parent_class)->dispose (object);
}
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_type_class_add_private (klass, sizeof (GtkSwitchPrivate));
activatable_iface = g_type_default_interface_peek (GTK_TYPE_ACTIVATABLE);
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);
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;
widget_class->get_accessible = gtk_switch_get_accessible;
klass->activate = gtk_switch_activate;
/**
* 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];
}
static void
gtk_switch_init (GtkSwitch *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GTK_TYPE_SWITCH, GtkSwitchPrivate);
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.
*
* Return value: 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;
GtkWidget *widget;
GtkStyleContext *context;
widget = GTK_WIDGET (sw);
priv->is_active = is_active;
g_object_notify_by_pspec (G_OBJECT (sw), switch_props[PROP_ACTIVE]);
if (priv->action)
gtk_action_activate (priv->action);
accessible = gtk_widget_get_accessible (GTK_WIDGET (sw));
atk_object_notify_state_change (accessible, ATK_STATE_CHECKED, priv->is_active);
if (gtk_widget_get_realized (widget))
{
context = gtk_widget_get_style_context (widget);
gtk_style_context_notify_state_change (context,
gtk_widget_get_window (widget),
NULL, GTK_STATE_ACTIVE, 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.
*
* Return value: %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;
}
static void
gtk_switch_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name)
{
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);
}
}
static void
gtk_switch_sync_action_properties (GtkActivatable *activatable,
GtkAction *action)
{
if (!action)
return;
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);
}
static void
gtk_switch_activatable_interface_init (GtkActivatableIface *iface)
{
iface->update = gtk_switch_update;
iface->sync_action_properties = gtk_switch_sync_action_properties;
}
/* accessibility: object */
typedef struct _GtkSwitchAccessible GtkSwitchAccessible;
typedef struct _GtkSwitchAccessibleClass GtkSwitchAccessibleClass;
struct _GtkSwitchAccessible
{
GtkAccessible object;
gchar *description;
guint action_idle;
};
static void atk_action_interface_init (AtkActionIface *iface);
ATK_DEFINE_TYPE_WITH_CODE (GtkSwitchAccessible, _gtk_switch_accessible, GTK_TYPE_SWITCH,
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init))
static AtkStateSet *
gtk_switch_accessible_ref_state_set (AtkObject *accessible)
{
AtkStateSet *state_set;
GtkWidget *widget;
state_set = ATK_OBJECT_CLASS (_gtk_switch_accessible_parent_class)->ref_state_set (accessible);
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
return state_set;
if (gtk_switch_get_active (GTK_SWITCH (widget)))
atk_state_set_add_state (state_set, ATK_STATE_CHECKED);
return state_set;
}
static void
gtk_switch_accessible_finalize (GObject *obj)
{
GtkSwitchAccessible *accessible = (GtkSwitchAccessible *)obj;
g_free (accessible->description);
if (accessible->action_idle)
g_source_remove (accessible->action_idle);
G_OBJECT_CLASS (_gtk_switch_accessible_parent_class)->finalize (obj);
}
static void
_gtk_switch_accessible_initialize (AtkObject *accessible,
gpointer widget)
{
ATK_OBJECT_CLASS (_gtk_switch_accessible_parent_class)->initialize (accessible, widget);
atk_object_set_role (accessible, ATK_ROLE_TOGGLE_BUTTON);
atk_object_set_name (accessible, C_("light switch widget", "Switch"));
atk_object_set_description (accessible, _("Switches between on and off states"));
}
static void
_gtk_switch_accessible_class_init (GtkSwitchAccessibleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
AtkObjectClass *atk_class = ATK_OBJECT_CLASS (klass);
object_class->finalize = gtk_switch_accessible_finalize;
atk_class->initialize = _gtk_switch_accessible_initialize;
atk_class->ref_state_set = gtk_switch_accessible_ref_state_set;
}
static void
_gtk_switch_accessible_init (GtkSwitchAccessible *self)
{
self->description = NULL;
self->action_idle = 0;
}
/* accessibility: action interface */
static gint
gtk_switch_action_get_n_actions (AtkAction *action)
{
return 1;
}
static const gchar *
gtk_switch_action_get_name (AtkAction *action,
gint i)
{
return "toggle";
}
static const gchar *
gtk_switch_action_get_description (AtkAction *action,
gint i)
{
GtkSwitchAccessible *accessible = (GtkSwitchAccessible*)action;
return accessible->description;
}
static gboolean
gtk_switch_action_set_description (AtkAction *action,
gint i,
const gchar *description)
{
GtkSwitchAccessible *accessible = (GtkSwitchAccessible*)action;
g_free (accessible->description);
accessible->description = g_strdup (description);
return TRUE;
}
static gboolean
idle_do_action (gpointer data)
{
GtkSwitchAccessible *accessible = data;
GtkWidget *widget;
GtkSwitch *sw;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (data));
sw = GTK_SWITCH (widget);
accessible->action_idle = 0;
if (widget == NULL ||
!gtk_widget_is_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
gtk_switch_set_active (sw, !gtk_switch_get_active (sw));
return FALSE;
}
static gboolean
gtk_switch_action_do_action (AtkAction *action,
gint i)
{
GtkSwitchAccessible *accessible;
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
if (widget == NULL)
return FALSE;
if (!gtk_widget_is_sensitive (widget) || !gtk_widget_get_visible (widget))
return FALSE;
accessible = (GtkSwitchAccessible *)action;
if (!accessible->action_idle)
accessible->action_idle = gdk_threads_add_idle (idle_do_action, accessible);
return TRUE;
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->do_action = gtk_switch_action_do_action;
iface->get_n_actions = gtk_switch_action_get_n_actions;
iface->get_name = gtk_switch_action_get_name;
iface->get_description = gtk_switch_action_get_description;
iface->set_description = gtk_switch_action_set_description;
}
/* accessibility: factory */
typedef AtkObjectFactoryClass GtkSwitchAccessibleFactoryClass;
typedef AtkObjectFactory GtkSwitchAccessibleFactory;
G_DEFINE_TYPE (GtkSwitchAccessibleFactory,
gtk_switch_accessible_factory,
ATK_TYPE_OBJECT_FACTORY);
static GType
gtk_switch_accessible_factory_get_accessible_type (void)
{
return _gtk_switch_accessible_get_type ();
}
static AtkObject *
gtk_switch_accessible_factory_create_accessible (GObject *obj)
{
AtkObject *accessible;
accessible = g_object_new (_gtk_switch_accessible_get_type (), NULL);
atk_object_initialize (accessible, obj);
return accessible;
}
static void
gtk_switch_accessible_factory_class_init (AtkObjectFactoryClass *klass)
{
klass->create_accessible = gtk_switch_accessible_factory_create_accessible;
klass->get_accessible_type = gtk_switch_accessible_factory_get_accessible_type;
}
static void
gtk_switch_accessible_factory_init (AtkObjectFactory *factory)
{
}
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