path: root/libgnomecanvas/gailcanvaswidget.c

/* GAIL - The GNOME Accessibility Implementation Library
 * Copyright 2001 Sun Microsystems Inc.
 *
 * This program 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.
 *
 * This program 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 General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gtk/gtk.h>
#include <libgnomecanvas/gnome-canvas.h>
#include <libgnomecanvas/gnome-canvas-widget.h>
#include "gailcanvaswidget.h"

static gint gail_canvas_widget_get_n_children
                        (AtkObject *obj);
static AtkObject *
        gail_canvas_widget_ref_child    (AtkObject *obj,
                                                 gint i);

G_DEFINE_TYPE (GailCanvasWidget,
           gail_canvas_widget,
           GAIL_TYPE_CANVAS_ITEM);

static void
gail_canvas_widget_init (GailCanvasWidget *foo)
{
  ;
}

AtkObject *
gail_canvas_widget_new (GObject *obj)
{
  gpointer object;
  AtkObject *atk_object;

  g_return_val_if_fail (GNOME_IS_CANVAS_WIDGET (obj), NULL);
  object = g_object_new (GAIL_TYPE_CANVAS_WIDGET, NULL);
  atk_object = ATK_OBJECT (object);
  atk_object_initialize (atk_object, obj);
  atk_object->role = ATK_ROLE_PANEL;
  return atk_object;
}

static void
gail_canvas_widget_class_init (GailCanvasWidgetClass *klass)
{
  AtkObjectClass *class = ATK_OBJECT_CLASS (klass);

  class->get_n_children = gail_canvas_widget_get_n_children;
  class->ref_child = gail_canvas_widget_ref_child;
}

static gint
gail_canvas_widget_get_n_children (AtkObject *obj)
{
  AtkGObjectAccessible *atk_gobj;
  GnomeCanvasWidget *canvas_widget;
  GObject *g_obj;

  g_return_val_if_fail (GAIL_IS_CANVAS_WIDGET (obj), 0);

  atk_gobj = ATK_GOBJECT_ACCESSIBLE (obj);
  g_obj = atk_gobject_accessible_get_object (atk_gobj);
  if (g_obj == NULL)
    /* State is defunct */
    return 0;

  g_return_val_if_fail (GNOME_IS_CANVAS_WIDGET (g_obj), 0);

  canvas_widget = GNOME_CANVAS_WIDGET (g_obj);
  g_return_val_if_fail (canvas_widget->widget, 0);
  return 1;
}

static AtkObject *
gail_canvas_widget_ref_child (AtkObject *obj,
                              gint i)
{
  AtkGObjectAccessible *atk_gobj;
  GnomeCanvasWidget *canvas_widget;
  GObject *g_obj;
  AtkObject *atk_child;

  g_return_val_if_fail (GAIL_IS_CANVAS_WIDGET (obj), NULL);

  if (i != 0)
    return NULL;

  atk_gobj = ATK_GOBJECT_ACCESSIBLE (obj);
  g_obj = atk_gobject_accessible_get_object (atk_gobj);
  if (g_obj == NULL)
    /* State is defunct */
    return NULL;

  g_return_val_if_fail (GNOME_IS_CANVAS_WIDGET (g_obj), NULL);

  canvas_widget = GNOME_CANVAS_WIDGET (g_obj);
  g_return_val_if_fail (canvas_widget->widget, NULL);

  atk_child = gtk_widget_get_accessible (canvas_widget->widget);
  g_object_ref (atk_child);
  atk_object_set_parent (atk_child, obj);
  return atk_child;
}