Pileus Git - ~andy/gtk/blob - modules/other/gail/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 (obj)->widget;
  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   widget = GTK_ACCESSIBLE (obj)->widget;
 104   if (widget == NULL)
 105     return NULL;
 106
 107   children = gtk_container_get_children (GTK_CONTAINER (widget));
 108   tmp_list = g_list_nth (children, i);
 109   if (!tmp_list)
 110     {
 111       g_list_free (children);
 112       return NULL;
 113     }
 114   accessible = gtk_widget_get_accessible (GTK_WIDGET (tmp_list->data));
 115
 116   g_list_free (children);
 117   g_object_ref (accessible);
 118   return accessible;
 119 }
 120
 121 static gint
 122 gail_container_add_gtk (GtkContainer *container,
 123                         GtkWidget    *widget,
 124                         gpointer     data)
 125 {
 126   GailContainer *gail_container = GAIL_CONTAINER (data);
 127   GailContainerClass *klass;
 128
 129   klass = GAIL_CONTAINER_GET_CLASS (gail_container);
 130
 131   if (klass->add_gtk)
 132     return klass->add_gtk (container, widget, data);
 133   else
 134     return 1;
 135 }
 136
 137 static gint
 138 gail_container_remove_gtk (GtkContainer *container,
 139                            GtkWidget    *widget,
 140                            gpointer     data)
 141 {
 142   GailContainer *gail_container = GAIL_CONTAINER (data);
 143   GailContainerClass *klass;
 144
 145   klass = GAIL_CONTAINER_GET_CLASS (gail_container);
 146
 147   if (klass->remove_gtk)
 148     return klass->remove_gtk (container, widget, data);
 149   else
 150     return 1;
 151 }
 152
 153 static gint
 154 gail_container_real_add_gtk (GtkContainer *container,
 155                              GtkWidget    *widget,
 156                              gpointer     data)
 157 {
 158   AtkObject* atk_parent = ATK_OBJECT (data);
 159   AtkObject* atk_child = gtk_widget_get_accessible (widget);
 160   GailContainer *gail_container = GAIL_CONTAINER (atk_parent);
 161   gint       index;
 162
 163   g_object_notify (G_OBJECT (atk_child), "accessible_parent");
 164
 165   g_list_free (gail_container->children);
 166   gail_container->children = gtk_container_get_children (container);
 167   index = g_list_index (gail_container->children, widget);
 168   g_signal_emit_by_name (atk_parent, "children_changed::add",
 169                          index, atk_child, NULL);
 170
 171   return 1;
 172 }
 173
 174 static gint
 175 gail_container_real_remove_gtk (GtkContainer       *container,
 176                                 GtkWidget          *widget,
 177                                 gpointer           data)
 178 {
 179   AtkPropertyValues values = { NULL };
 180   AtkObject* atk_parent;
 181   AtkObject *atk_child;
 182   GailContainer *gail_container;
 183   gint       index;
 184
 185   atk_parent = ATK_OBJECT (data);
 186   atk_child = gtk_widget_get_accessible (widget);
 187
 188   if (atk_child)
 189     {
 190       g_value_init (&values.old_value, G_TYPE_POINTER);
 191       g_value_set_pointer (&values.old_value, atk_parent);
 192
 193       values.property_name = "accessible-parent";
 194
 195       g_object_ref (atk_child);
 196       g_signal_emit_by_name (atk_child,
 197                              "property_change::accessible-parent", &values, NULL);
 198       g_object_unref (atk_child);
 199     }
 200   gail_container = GAIL_CONTAINER (atk_parent);
 201   index = g_list_index (gail_container->children, widget);
 202   g_list_free (gail_container->children);
 203   gail_container->children = gtk_container_get_children (container);
 204   if (index >= 0 && index <= g_list_length (gail_container->children))
 205     g_signal_emit_by_name (atk_parent, "children_changed::remove",
 206                            index, atk_child, NULL);
 207
 208   return 1;
 209 }
 210
 211 static void
 212 gail_container_real_initialize (AtkObject *obj,
 213                                 gpointer  data)
 214 {
 215   GailContainer *container = GAIL_CONTAINER (obj);
 216   guint handler_id;
 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   /*
 223    * We store the handler ids for these signals in case some objects
 224    * need to remove these handlers.
 225    */
 226   handler_id = g_signal_connect (data,
 227                                  "add",
 228                                  G_CALLBACK (gail_container_add_gtk),
 229                                  obj);
 230   g_object_set_data (G_OBJECT (obj), "gail-add-handler-id",
 231                      GUINT_TO_POINTER (handler_id));
 232   handler_id = g_signal_connect (data,
 233                                  "remove",
 234                                  G_CALLBACK (gail_container_remove_gtk),
 235                                  obj);
 236   g_object_set_data (G_OBJECT (obj), "gail-remove-handler-id",
 237                      GUINT_TO_POINTER (handler_id));
 238
 239   if (GTK_IS_TOOLBAR (data))
 240     obj->role = ATK_ROLE_TOOL_BAR;
 241   else if (GTK_IS_VIEWPORT (data))
 242     obj->role = ATK_ROLE_VIEWPORT;
 243   else
 244     obj->role = ATK_ROLE_PANEL;
 245 }
 246
 247 static void
 248 gail_container_finalize (GObject *object)
 249 {
 250   GailContainer *container = GAIL_CONTAINER (object);
 251
 252   g_list_free (container->children);
 253   G_OBJECT_CLASS (gail_container_parent_class)->finalize (object);
 254 }