110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/* GTK+ - accessibility implementations
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* Copyright (C) 2016 Timm Bäder <mail@baedert.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "gtkstackaccessible.h"
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#include "gtkwidgetprivate.h"
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G_DEFINE_TYPE (GtkStackAccessible, gtk_stack_accessible, GTK_TYPE_CONTAINER_ACCESSIBLE)
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static AtkObject*
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gtk_stack_accessible_ref_child (AtkObject *obj,
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int i)
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{
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GtkWidget *stack = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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GtkWidget *visible_child;
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if (stack == NULL)
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return NULL;
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if (i != 0)
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return NULL;
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visible_child = gtk_stack_get_visible_child (GTK_STACK (stack));
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if (visible_child == NULL)
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return NULL;
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return g_object_ref (gtk_widget_get_accessible (visible_child));
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}
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static int
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gtk_stack_accessible_get_n_children (AtkObject *obj)
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{
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GtkWidget *stack = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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if (stack == NULL)
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return 0;
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if (gtk_stack_get_visible_child (GTK_STACK (stack)))
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return 1;
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return 0;
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}
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static void
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gtk_stack_accessible_class_init (GtkStackAccessibleClass *klass)
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{
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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GtkContainerAccessibleClass *container_class = (GtkContainerAccessibleClass*)klass;
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class->get_n_children = gtk_stack_accessible_get_n_children;
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class->ref_child = gtk_stack_accessible_ref_child;
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/*
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* As we report the stack as having only the visible child,
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* we are not interested in add and remove signals
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*/
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container_class->add_gtk = NULL;
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container_class->remove_gtk = NULL;
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}
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static void
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gtk_stack_accessible_init (GtkStackAccessible *bar) {}
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void
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gtk_stack_accessible_update_visible_child (GtkStack *stack,
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GtkWidget *old_visible_child,
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GtkWidget *new_visible_child)
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{
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AtkObject *stack_accessible = _gtk_widget_peek_accessible (GTK_WIDGET (stack));
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if (stack_accessible == NULL)
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return;
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if (old_visible_child)
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{
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AtkObject *accessible = gtk_widget_get_accessible (old_visible_child);
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g_object_notify (G_OBJECT (accessible), "accessible-parent");
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g_signal_emit_by_name (stack_accessible, "children-changed::remove", 0, accessible, NULL);
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}
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if (new_visible_child)
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{
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AtkObject *accessible = gtk_widget_get_accessible (new_visible_child);
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g_object_notify (G_OBJECT (accessible), "accessible-parent");
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g_signal_emit_by_name (stack_accessible, "children-changed::add", 0, accessible, NULL);
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}
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}
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