Pileus Git - ~andy/gtk/blob - gtk/a11y/gailcontainer.c

   1 /* GAIL - The GNOME Accessibility Implementation Library
   2  * Copyright 2001, 2002, 2003 Sun Microsystems Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "config.h"
  21
  22 #include <gtk/gtk.h>
  23 #include "gailcontainer.h"
  24
  25 static void         gail_container_class_init          (GailContainerClass *klass);
  26 static void         gail_container_init                (GailContainer      *container);
  27
  28 static gint         gail_container_get_n_children      (AtkObject          *obj);
  29 static AtkObject*   gail_container_ref_child           (AtkObject          *obj,
  30                                                         gint               i);
  31 static gint         gail_container_add_gtk             (GtkContainer       *container,
  32                                                         GtkWidget          *widget,
  33                                                         gpointer           data);
  34 static gint         gail_container_remove_gtk          (GtkContainer       *container,
  35                                                         GtkWidget          *widget,
  36                                                         gpointer           data);
  37 static gint         gail_container_real_add_gtk        (GtkContainer       *container,
  38                                                         GtkWidget          *widget,
  39                                                         gpointer           data);
  40 static gint         gail_container_real_remove_gtk     (GtkContainer       *container,
  41                                                         GtkWidget          *widget,
  42                                                         gpointer           data);
  43
  44 static void          gail_container_real_initialize    (AtkObject          *obj,
  45                                                         gpointer           data);
  46
  47 static void          gail_container_finalize           (GObject            *object);
  48
  49 G_DEFINE_TYPE (GailContainer, gail_container, GAIL_TYPE_WIDGET)
  50
  51 static void
  52 gail_container_class_init (GailContainerClass *klass)
  53 {
  54   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  55   AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
  56
  57   gobject_class->finalize = gail_container_finalize;
  58
  59   class->get_n_children = gail_container_get_n_children;
  60   class->ref_child = gail_container_ref_child;
  61   class->initialize = gail_container_real_initialize;
  62
  63   klass->add_gtk = gail_container_real_add_gtk;
  64   klass->remove_gtk = gail_container_real_remove_gtk;
  65 }
  66
  67 static void
  68 gail_container_init (GailContainer      *container)
  69 {
  70   container->children = NULL;
  71 }
  72
  73 static gint
  74 gail_container_get_n_children (AtkObject* obj)
  75 {
  76   GtkWidget *widget;
  77   GList *children;
  78   gint count = 0;
  79
  80   g_return_val_if_fail (GAIL_IS_CONTAINER (obj), count);
  81
  82   widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
  83   if (widget == NULL)
  84     return 0;
  85
  86   children = gtk_container_get_children (GTK_CONTAINER(widget));
  87   count = g_list_length (children);
  88   g_list_free (children);
  89
  90   return count;
  91 }
  92
  93 static AtkObject*
  94 gail_container_ref_child (AtkObject *obj,
  95                           gint       i)
  96 {
  97   GList *children, *tmp_list;
  98   AtkObject  *accessible;
  99   GtkWidget *widget;
 100
 101   g_return_val_if_fail (GAIL_IS_CONTAINER (obj), NULL);
 102   g_return_val_if_fail ((i >= 0), NULL);
 103
 104   widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
 105   if (widget == NULL)
 106     return NULL;
 107
 108   children = gtk_container_get_children (GTK_CONTAINER (widget));
 109   tmp_list = g_list_nth (children, i);
 110   if (!tmp_list)
 111     {
 112       g_list_free (children);
 113       return NULL;
 114     }
 115   accessible = gtk_widget_get_accessible (GTK_WIDGET (tmp_list->data));
 116
 117   g_list_free (children);
 118   g_object_ref (accessible);
 119   return accessible;
 120 }
 121
 122 static gint
 123 gail_container_add_gtk (GtkContainer *container,
 124                         GtkWidget    *widget,
 125                         gpointer     data)
 126 {
 127   GailContainer *gail_container = GAIL_CONTAINER (data);
 128   GailContainerClass *klass;
 129
 130   klass = GAIL_CONTAINER_GET_CLASS (gail_container);
 131
 132   if (klass->add_gtk)
 133     return klass->add_gtk (container, widget, data);
 134   else
 135     return 1;
 136 }
 137
 138 static gint
 139 gail_container_remove_gtk (GtkContainer *container,
 140                            GtkWidget    *widget,
 141                            gpointer     data)
 142 {
 143   GailContainer *gail_container = GAIL_CONTAINER (data);
 144   GailContainerClass *klass;
 145
 146   klass = GAIL_CONTAINER_GET_CLASS (gail_container);
 147
 148   if (klass->remove_gtk)
 149     return klass->remove_gtk (container, widget, data);
 150   else
 151     return 1;
 152 }
 153
 154 static gint
 155 gail_container_real_add_gtk (GtkContainer *container,
 156                              GtkWidget    *widget,
 157                              gpointer     data)
 158 {
 159   AtkObject* atk_parent = ATK_OBJECT (data);
 160   AtkObject* atk_child = gtk_widget_get_accessible (widget);
 161   GailContainer *gail_container = GAIL_CONTAINER (atk_parent);
 162   gint       index;
 163
 164   g_object_notify (G_OBJECT (atk_child), "accessible_parent");
 165
 166   g_list_free (gail_container->children);
 167   gail_container->children = gtk_container_get_children (container);
 168   index = g_list_index (gail_container->children, widget);
 169   g_signal_emit_by_name (atk_parent, "children_changed::add",
 170                          index, atk_child, NULL);
 171
 172   return 1;
 173 }
 174
 175 static gint
 176 gail_container_real_remove_gtk (GtkContainer       *container,
 177                                 GtkWidget          *widget,
 178                                 gpointer           data)
 179 {
 180   AtkPropertyValues values = { NULL };
 181   AtkObject* atk_parent;
 182   AtkObject *atk_child;
 183   GailContainer *gail_container;
 184   gint       index;
 185
 186   atk_parent = ATK_OBJECT (data);
 187   atk_child = gtk_widget_get_accessible (widget);
 188
 189   if (atk_child)
 190     {
 191       g_value_init (&values.old_value, G_TYPE_POINTER);
 192       g_value_set_pointer (&values.old_value, atk_parent);
 193
 194       values.property_name = "accessible-parent";
 195
 196       g_object_ref (atk_child);
 197       g_signal_emit_by_name (atk_child,
 198                              "property_change::accessible-parent", &values, NULL);
 199       g_object_unref (atk_child);
 200     }
 201   gail_container = GAIL_CONTAINER (atk_parent);
 202   index = g_list_index (gail_container->children, widget);
 203   g_list_free (gail_container->children);
 204   gail_container->children = gtk_container_get_children (container);
 205   if (index >= 0 && index <= g_list_length (gail_container->children))
 206     g_signal_emit_by_name (atk_parent, "children_changed::remove",
 207                            index, atk_child, NULL);
 208
 209   return 1;
 210 }
 211
 212 static void
 213 gail_container_real_initialize (AtkObject *obj,
 214                                 gpointer  data)
 215 {
 216   GailContainer *container = GAIL_CONTAINER (obj);
 217
 218   ATK_OBJECT_CLASS (gail_container_parent_class)->initialize (obj, data);
 219
 220   container->children = gtk_container_get_children (GTK_CONTAINER (data));
 221
 222   g_signal_connect (data, "add",
 223                     G_CALLBACK (gail_container_add_gtk),
 224                     obj);
 225   g_signal_connect (data, "remove",
 226                     G_CALLBACK (gail_container_remove_gtk),
 227                     obj);
 228
 229   if (GTK_IS_TOOLBAR (data))
 230     obj->role = ATK_ROLE_TOOL_BAR;
 231   else if (GTK_IS_VIEWPORT (data))
 232     obj->role = ATK_ROLE_VIEWPORT;
 233   else
 234     obj->role = ATK_ROLE_PANEL;
 235 }
 236
 237 static void
 238 gail_container_finalize (GObject *object)
 239 {
 240   GailContainer *container = GAIL_CONTAINER (object);
 241
 242   g_list_free (container->children);
 243   G_OBJECT_CLASS (gail_container_parent_class)->finalize (object);
 244 }