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/* GTK+ - accessibility implementations
* Copyright (C) 2016 Timm Bäder <mail@baedert.org>
*
* 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/>.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gtkstackaccessibleprivate.h"
#include "gtkwidgetprivate.h"
G_DEFINE_TYPE (GtkStackAccessible, gtk_stack_accessible, GTK_TYPE_WIDGET_ACCESSIBLE)
static AtkObject*
gtk_stack_accessible_ref_child (AtkObject *obj,
int i)
{
GtkWidget *stack = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
GtkWidget *visible_child;
if (stack == NULL)
return NULL;
if (i != 0)
return NULL;
visible_child = gtk_stack_get_visible_child (GTK_STACK (stack));
if (visible_child == NULL)
return NULL;
return g_object_ref (gtk_widget_get_accessible (visible_child));
}
static int
gtk_stack_accessible_get_n_children (AtkObject *obj)
{
GtkWidget *stack = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (stack == NULL)
return 0;
if (gtk_stack_get_visible_child (GTK_STACK (stack)))
return 1;
return 0;
}
static void
gtk_stack_accessible_class_init (GtkStackAccessibleClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
class->get_n_children = gtk_stack_accessible_get_n_children;
class->ref_child = gtk_stack_accessible_ref_child;
}
static void
gtk_stack_accessible_init (GtkStackAccessible *bar) {}
void
gtk_stack_accessible_update_visible_child (GtkStack *stack,
GtkWidget *old_visible_child,
GtkWidget *new_visible_child)
{
AtkObject *stack_accessible = _gtk_widget_peek_accessible (GTK_WIDGET (stack));
if (stack_accessible == NULL)
return;
if (old_visible_child)
{
AtkObject *accessible = gtk_widget_get_accessible (old_visible_child);
g_object_notify (G_OBJECT (accessible), "accessible-parent");
g_signal_emit_by_name (stack_accessible, "children-changed::remove", 0, accessible, NULL);
}
if (new_visible_child)
{
AtkObject *accessible = gtk_widget_get_accessible (new_visible_child);
g_object_notify (G_OBJECT (accessible), "accessible-parent");
g_signal_emit_by_name (stack_accessible, "children-changed::add", 0, accessible, NULL);
}
}
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