Blame modules/other/gail/gailcontainer.c

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/* GAIL - The GNOME Accessibility Implementation Library
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 * Copyright 2001, 2002, 2003 Sun Microsystems Inc.
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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, write to the
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 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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 * Boston, MA 02111-1307, USA.
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 */
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#include "config.h"
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#include <gtk/gtk.h>
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#include "gailcontainer.h"
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static void         gail_container_class_init          (GailContainerClass *klass);
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static void         gail_container_init                (GailContainer      *container);
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static gint         gail_container_get_n_children      (AtkObject          *obj);
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static AtkObject*   gail_container_ref_child           (AtkObject          *obj,
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                                                        gint               i);
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static gint         gail_container_add_gtk             (GtkContainer       *container,
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                                                        GtkWidget          *widget,
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                                                        gpointer           data);
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static gint         gail_container_remove_gtk          (GtkContainer       *container,
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                                                        GtkWidget          *widget,
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                                                        gpointer           data);
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static gint         gail_container_real_add_gtk        (GtkContainer       *container,
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                                                        GtkWidget          *widget,
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                                                        gpointer           data);
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static gint         gail_container_real_remove_gtk     (GtkContainer       *container,
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                                                        GtkWidget          *widget,
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                                                        gpointer           data);
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static void          gail_container_real_initialize    (AtkObject          *obj,
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                                                        gpointer           data);
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static void          gail_container_finalize           (GObject            *object);
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G_DEFINE_TYPE (GailContainer, gail_container, GAIL_TYPE_WIDGET)
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static void
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gail_container_class_init (GailContainerClass *klass)
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{
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  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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  AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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  gobject_class->finalize = gail_container_finalize;
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  class->get_n_children = gail_container_get_n_children;
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  class->ref_child = gail_container_ref_child;
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  class->initialize = gail_container_real_initialize;
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  klass->add_gtk = gail_container_real_add_gtk;
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  klass->remove_gtk = gail_container_real_remove_gtk;
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}
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static void
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gail_container_init (GailContainer      *container)
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{
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  container->children = NULL;
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}
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static gint
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gail_container_get_n_children (AtkObject* obj)
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{
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  GtkWidget *widget;
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  GList *children;
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  gint count = 0;
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  g_return_val_if_fail (GAIL_IS_CONTAINER (obj), count);
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  widget = GTK_ACCESSIBLE (obj)->widget;
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  if (widget == NULL)
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    return 0;
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  children = gtk_container_get_children (GTK_CONTAINER(widget));
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  count = g_list_length (children);
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  g_list_free (children);
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  return count; 
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}
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static AtkObject* 
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gail_container_ref_child (AtkObject *obj,
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                          gint       i)
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{
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  GList *children, *tmp_list;
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  AtkObject  *accessible;
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  GtkWidget *widget;
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  g_return_val_if_fail (GAIL_IS_CONTAINER (obj), NULL);
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  g_return_val_if_fail ((i >= 0), NULL);
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  widget = GTK_ACCESSIBLE (obj)->widget;
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  if (widget == NULL)
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    return NULL;
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  children = gtk_container_get_children (GTK_CONTAINER (widget));
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  tmp_list = g_list_nth (children, i);
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  if (!tmp_list)
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    {
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      g_list_free (children);
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      return NULL;
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    }  
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  accessible = gtk_widget_get_accessible (GTK_WIDGET (tmp_list->data));
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  g_list_free (children);
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  g_object_ref (accessible);
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  return accessible; 
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}
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static gint
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gail_container_add_gtk (GtkContainer *container,
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                        GtkWidget    *widget,
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                        gpointer     data)
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{
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  GailContainer *gail_container = GAIL_CONTAINER (data);
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  GailContainerClass *klass;
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  klass = GAIL_CONTAINER_GET_CLASS (gail_container);
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  if (klass->add_gtk)
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    return klass->add_gtk (container, widget, data);
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  else
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    return 1;
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}
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static gint
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gail_container_remove_gtk (GtkContainer *container,
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                           GtkWidget    *widget,
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                           gpointer     data)
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{
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  GailContainer *gail_container = GAIL_CONTAINER (data);
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  GailContainerClass *klass;
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  klass = GAIL_CONTAINER_GET_CLASS (gail_container);
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  if (klass->remove_gtk)
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    return klass->remove_gtk (container, widget, data);
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  else
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    return 1;
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}
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static gint
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gail_container_real_add_gtk (GtkContainer *container,
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                             GtkWidget    *widget,
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                             gpointer     data)
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{
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  AtkObject* atk_parent = ATK_OBJECT (data);
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  AtkObject* atk_child = gtk_widget_get_accessible (widget);
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  GailContainer *gail_container = GAIL_CONTAINER (atk_parent);
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  gint       index;
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  g_object_notify (G_OBJECT (atk_child), "accessible_parent");
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  g_list_free (gail_container->children);
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  gail_container->children = gtk_container_get_children (container);
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  index = g_list_index (gail_container->children, widget);
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  g_signal_emit_by_name (atk_parent, "children_changed::add", 
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                         index, atk_child, NULL);
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  return 1;
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}
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static gint
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gail_container_real_remove_gtk (GtkContainer       *container,
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                                GtkWidget          *widget,
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                                gpointer           data)
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{
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  AtkPropertyValues values = { NULL };
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  AtkObject* atk_parent;
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  AtkObject *atk_child;
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  GailContainer *gail_container;
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  gint       index;
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  atk_parent = ATK_OBJECT (data);
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  atk_child = gtk_widget_get_accessible (widget);
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  if (atk_child)
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    {
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      g_value_init (&values.old_value, G_TYPE_POINTER);
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      g_value_set_pointer (&values.old_value, atk_parent);
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      values.property_name = "accessible-parent";
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      g_object_ref (atk_child);
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      g_signal_emit_by_name (atk_child,
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                             "property_change::accessible-parent", &values, NULL);
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      g_object_unref (atk_child);
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    }
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  gail_container = GAIL_CONTAINER (atk_parent);
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  index = g_list_index (gail_container->children, widget);
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  g_list_free (gail_container->children);
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  gail_container->children = gtk_container_get_children (container);
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  if (index >= 0 && index <= g_list_length (gail_container->children))
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    g_signal_emit_by_name (atk_parent, "children_changed::remove", 
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			   index, atk_child, NULL);
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  return 1;
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}
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static void
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gail_container_real_initialize (AtkObject *obj,
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                                gpointer  data)
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{
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  GailContainer *container = GAIL_CONTAINER (obj);
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  guint handler_id;
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  ATK_OBJECT_CLASS (gail_container_parent_class)->initialize (obj, data);
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  container->children = gtk_container_get_children (GTK_CONTAINER (data));
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  /*
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   * We store the handler ids for these signals in case some objects
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   * need to remove these handlers.
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   */
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  handler_id = g_signal_connect (data,
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                                 "add",
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                                 G_CALLBACK (gail_container_add_gtk),
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                                 obj);
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  g_object_set_data (G_OBJECT (obj), "gail-add-handler-id", 
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                     GUINT_TO_POINTER (handler_id));
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  handler_id = g_signal_connect (data,
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                                 "remove",
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                                 G_CALLBACK (gail_container_remove_gtk),
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                                 obj);
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  g_object_set_data (G_OBJECT (obj), "gail-remove-handler-id", 
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                     GUINT_TO_POINTER (handler_id));
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  if (GTK_IS_TOOLBAR (data))
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    obj->role = ATK_ROLE_TOOL_BAR;
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  else if (GTK_IS_VIEWPORT (data))
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    obj->role = ATK_ROLE_VIEWPORT;
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  else
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    obj->role = ATK_ROLE_PANEL;
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}
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static void
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gail_container_finalize (GObject *object)
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{
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  GailContainer *container = GAIL_CONTAINER (object);
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  g_list_free (container->children);
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  G_OBJECT_CLASS (gail_container_parent_class)->finalize (object);
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}