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1 /* GAIL - The GNOME Accessibility Implementation Library
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, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 */
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <gtk/gtk.h>
25 #include <libgnomecanvas/gnome-canvas.h>
26 #include <libgnomecanvas/gnome-canvas-widget.h>
27 #include "gailcanvaswidget.h"
28
29 static gint gail_canvas_widget_get_n_children
30 (AtkObject *obj);
31 static AtkObject *
32 gail_canvas_widget_ref_child (AtkObject *obj,
33 gint i);
34
35 G_DEFINE_TYPE (GailCanvasWidget,
36 gail_canvas_widget,
37 GAIL_TYPE_CANVAS_ITEM);
38
39 static void
40 gail_canvas_widget_init (GailCanvasWidget *foo)
41 {
42 ;
43 }
44
45 AtkObject *
46 gail_canvas_widget_new (GObject *obj)
47 {
48 gpointer object;
49 AtkObject *atk_object;
50
51 g_return_val_if_fail (GNOME_IS_CANVAS_WIDGET (obj), NULL);
52 object = g_object_new (GAIL_TYPE_CANVAS_WIDGET, NULL);
53 atk_object = ATK_OBJECT (object);
54 atk_object_initialize (atk_object, obj);
55 atk_object->role = ATK_ROLE_PANEL;
56 return atk_object;
57 }
58
59 static void
60 gail_canvas_widget_class_init (GailCanvasWidgetClass *klass)
61 {
62 AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
63
64 class->get_n_children = gail_canvas_widget_get_n_children;
65 class->ref_child = gail_canvas_widget_ref_child;
66 }
67
68 static gint
69 gail_canvas_widget_get_n_children (AtkObject *obj)
70 {
71 AtkGObjectAccessible *atk_gobj;
72 GnomeCanvasWidget *canvas_widget;
73 GObject *g_obj;
74
75 g_return_val_if_fail (GAIL_IS_CANVAS_WIDGET (obj), 0);
76
77 atk_gobj = ATK_GOBJECT_ACCESSIBLE (obj);
78 g_obj = atk_gobject_accessible_get_object (atk_gobj);
79 if (g_obj == NULL)
80 /* State is defunct */
81 return 0;
82
83 g_return_val_if_fail (GNOME_IS_CANVAS_WIDGET (g_obj), 0);
84
85 canvas_widget = GNOME_CANVAS_WIDGET (g_obj);
86 g_return_val_if_fail (canvas_widget->widget, 0);
87 return 1;
88 }
89
90 static AtkObject *
91 gail_canvas_widget_ref_child (AtkObject *obj,
92 gint i)
93 {
94 AtkGObjectAccessible *atk_gobj;
95 GnomeCanvasWidget *canvas_widget;
96 GObject *g_obj;
97 AtkObject *atk_child;
98
99 g_return_val_if_fail (GAIL_IS_CANVAS_WIDGET (obj), NULL);
100
101 if (i != 0)
102 return NULL;
103
104 atk_gobj = ATK_GOBJECT_ACCESSIBLE (obj);
105 g_obj = atk_gobject_accessible_get_object (atk_gobj);
106 if (g_obj == NULL)
107 /* State is defunct */
108 return NULL;
109
110 g_return_val_if_fail (GNOME_IS_CANVAS_WIDGET (g_obj), NULL);
111
112 canvas_widget = GNOME_CANVAS_WIDGET (g_obj);
113 g_return_val_if_fail (canvas_widget->widget, NULL);
114
115 atk_child = gtk_widget_get_accessible (canvas_widget->widget);
116 g_object_ref (atk_child);
117 atk_object_set_parent (atk_child, obj);
118 return atk_child;
119 }