/* GAIL - The GNOME Accessibility Implementation Library

 * Copyright 2001 Sun Microsystems 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.

 */

#include "config.h"

#include <gtk/gtk.h>

#include "gailscrollbar.h"

static void gail_scrollbar_class_init  (GailScrollbarClass *klass);

static void gail_scrollbar_init        (GailScrollbar      *accessible);

static void gail_scrollbar_initialize  (AtkObject           *accessible,

                                        gpointer             data);

static gint gail_scrollbar_get_index_in_parent (AtkObject *accessible);

G_DEFINE_TYPE (GailScrollbar, gail_scrollbar, GAIL_TYPE_RANGE)

static void	 

gail_scrollbar_class_init (GailScrollbarClass *klass)

{

  AtkObjectClass *class = ATK_OBJECT_CLASS (klass);

  class->initialize = gail_scrollbar_initialize;

  class->get_index_in_parent = gail_scrollbar_get_index_in_parent;

}

static void

gail_scrollbar_init (GailScrollbar      *accessible)

{

}

static void

gail_scrollbar_initialize (AtkObject *accessible,

                           gpointer  data)

{

  ATK_OBJECT_CLASS (gail_scrollbar_parent_class)->initialize (accessible, data);

  accessible->role = ATK_ROLE_SCROLL_BAR;

}

static gint

gail_scrollbar_get_index_in_parent (AtkObject *accessible)

{

  GtkWidget *widget;

  GtkScrolledWindow *scrolled_window;

  gint n_children;

  GList *children;

  widget = GTK_ACCESSIBLE (accessible)->widget;

  if (widget == NULL)

  {

    /*

     * State is defunct

     */

    return -1;

  }

  g_return_val_if_fail (GTK_IS_SCROLLBAR (widget), -1);

  if (!GTK_IS_SCROLLED_WINDOW(widget->parent))

    return ATK_OBJECT_CLASS (gail_scrollbar_parent_class)->get_index_in_parent (accessible);

  scrolled_window = GTK_SCROLLED_WINDOW (widget->parent);

  children = gtk_container_get_children (GTK_CONTAINER (scrolled_window));

  n_children = g_list_length (children);

  g_list_free (children);

  if (GTK_IS_HSCROLLBAR (widget))

  {

    if (!scrolled_window->hscrollbar_visible) 

    {

      n_children = -1;

    }

  }

  else if (GTK_IS_VSCROLLBAR (widget))

  {

    if (!scrolled_window->vscrollbar_visible) 

    {

      n_children = -1;

    }

    else if (scrolled_window->hscrollbar_visible) 

    {

      n_children++;

    }

  }

  else

  {

    n_children = -1;

  }

  return n_children;

}