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

   1 /* GTK+ - accessibility implementations
   2  * Copyright 2001 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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "config.h"
  19
  20 #include <gtk/gtk.h>
  21 #include "gtkradiobuttonaccessible.h"
  22
  23 struct _GtkRadioButtonAccessiblePrivate
  24 {
  25   GSList *old_group;
  26 };
  27
  28
  29 G_DEFINE_TYPE (GtkRadioButtonAccessible, gtk_radio_button_accessible, GTK_TYPE_TOGGLE_BUTTON_ACCESSIBLE)
  30
  31 static void
  32 gtk_radio_button_accessible_initialize (AtkObject *accessible,
  33                                         gpointer   data)
  34 {
  35   ATK_OBJECT_CLASS (gtk_radio_button_accessible_parent_class)->initialize (accessible, data);
  36
  37   accessible->role = ATK_ROLE_RADIO_BUTTON;
  38 }
  39
  40 static AtkRelationSet *
  41 gtk_radio_button_accessible_ref_relation_set (AtkObject *obj)
  42 {
  43   GtkWidget *widget;
  44   AtkRelationSet *relation_set;
  45   GSList *list;
  46   GtkRadioButtonAccessible *radio_button;
  47
  48   widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
  49   if (widget == NULL)
  50     return NULL;
  51
  52   radio_button = GTK_RADIO_BUTTON_ACCESSIBLE (obj);
  53
  54   relation_set = ATK_OBJECT_CLASS (gtk_radio_button_accessible_parent_class)->ref_relation_set (obj);
  55
  56   /* If the radio button'group has changed remove the relation */
  57   list = gtk_radio_button_get_group (GTK_RADIO_BUTTON (widget));
  58
  59   if (radio_button->priv->old_group != list)
  60     {
  61       AtkRelation *relation;
  62
  63       relation = atk_relation_set_get_relation_by_type (relation_set, ATK_RELATION_MEMBER_OF);
  64       atk_relation_set_remove (relation_set, relation);
  65     }
  66
  67   if (!atk_relation_set_contains (relation_set, ATK_RELATION_MEMBER_OF))
  68   {
  69     /*
  70      * Get the members of the button group
  71      */
  72     radio_button->priv->old_group = list;
  73     if (list)
  74       {
  75         AtkObject **accessible_array;
  76         guint list_length;
  77         AtkRelation* relation;
  78         gint i = 0;
  79
  80         list_length = g_slist_length (list);
  81         accessible_array = g_new (AtkObject *, list_length);
  82         while (list != NULL)
  83           {
  84             GtkWidget* list_item = list->data;
  85
  86             accessible_array[i++] = gtk_widget_get_accessible (list_item);
  87
  88             list = list->next;
  89           }
  90         relation = atk_relation_new (accessible_array, list_length,
  91                                      ATK_RELATION_MEMBER_OF);
  92         g_free (accessible_array);
  93
  94         atk_relation_set_add (relation_set, relation);
  95         /*
  96          * Unref the relation so that it is not leaked.
  97          */
  98         g_object_unref (relation);
  99       }
 100     }
 101
 102   return relation_set;
 103 }
 104
 105 static void
 106 gtk_radio_button_accessible_class_init (GtkRadioButtonAccessibleClass *klass)
 107 {
 108   AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
 109
 110   class->initialize = gtk_radio_button_accessible_initialize;
 111   class->ref_relation_set = gtk_radio_button_accessible_ref_relation_set;
 112
 113   g_type_class_add_private (klass, sizeof (GtkRadioButtonAccessiblePrivate));
 114 }
 115
 116 static void
 117 gtk_radio_button_accessible_init (GtkRadioButtonAccessible *radio_button)
 118 {
 119   radio_button->priv = G_TYPE_INSTANCE_GET_PRIVATE (radio_button,
 120                                                     GTK_TYPE_RADIO_BUTTON_ACCESSIBLE,
 121                                                     GtkRadioButtonAccessiblePrivate);
 122 }