/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gtk/gtk.h>
#include <libgnomecanvas/gnome-canvas.h>
#include <libgnomecanvas/gnome-canvas-text.h>
#include <libgnomecanvas/gnome-canvas-rich-text.h>
#include <libgnomecanvas/gnome-canvas-widget.h>
#include "gailcanvas.h"
#include "gailcanvasitem.h"
#include "gailcanvasgroupfactory.h"
#include "gailcanvastextfactory.h"
#include "gailcanvasitemfactory.h"
#include "gailcanvaswidgetfactory.h"
static void gail_canvas_class_init (GailCanvasClass *klass);
static void gail_canvas_real_initialize (AtkObject *obj,
gpointer data);
static gint gail_canvas_get_n_children (AtkObject *obj);
static AtkObject* gail_canvas_ref_child (AtkObject *obj,
gint i);
static void adjustment_changed (GtkAdjustment *adjustment,
GnomeCanvas *canvas);
static AtkObject* gail_canvas_factory_create_accessible (GObject *obj);
static GType gail_canvas_factory_get_accessible_type (void);
G_DEFINE_TYPE (GailCanvasFactory,
gail_canvas_factory,
ATK_TYPE_OBJECT_FACTORY);
static void
gail_canvas_factory_init (GailCanvasFactory *foo)
{
;
}
static void
gail_canvas_factory_class_init (GailCanvasFactoryClass *klass)
{
AtkObjectFactoryClass *class = ATK_OBJECT_FACTORY_CLASS (klass);
class->create_accessible = gail_canvas_factory_create_accessible;
class->get_accessible_type = gail_canvas_factory_get_accessible_type;
}
static AtkObject*
gail_canvas_factory_create_accessible (GObject *obj)
{
return gail_canvas_new (GTK_WIDGET (obj));
}
static GType
gail_canvas_factory_get_accessible_type (void)
{
return GAIL_TYPE_CANVAS;
}
GType
gail_canvas_get_type (void)
{
static GType type = 0;
if (!type)
{
GType parent_type = g_type_parent (GNOME_TYPE_CANVAS);
AtkObjectFactory *factory = atk_registry_get_factory (
atk_get_default_registry (),
parent_type);
GType atkobject_parent_type = atk_object_factory_get_accessible_type (factory);
GTypeQuery query;
static GTypeInfo tinfo =
{
0, /* class size */
(GBaseInitFunc) NULL, /* base init */
(GBaseFinalizeFunc) NULL, /* base finalize */
(GClassInitFunc) gail_canvas_class_init, /* class init */
(GClassFinalizeFunc) NULL, /* class finalize */
NULL, /* class data */
0, /* instance size */
0, /* nb preallocs */
(GInstanceInitFunc) NULL, /* instance init */
NULL /* value table */
};
g_type_query (atkobject_parent_type, &query);
tinfo.class_size = query.class_size;
tinfo.instance_size = query.instance_size;
/* use the size obtained from the parent type factory */
type = g_type_register_static (atkobject_parent_type,
"GailCanvas", &tinfo, 0);
}
return type;
}
static AtkObjectClass *parent_atk_object_class;
/**
* Tell ATK how to create the appropriate AtkObject peers
**/
void
gail_canvas_init (void)
{
atk_registry_set_factory_type (atk_get_default_registry (),
GNOME_TYPE_CANVAS,
gail_canvas_factory_get_type ());
atk_registry_set_factory_type (atk_get_default_registry (),
GNOME_TYPE_CANVAS_GROUP,
gail_canvas_group_factory_get_type ());
atk_registry_set_factory_type (atk_get_default_registry (),
GNOME_TYPE_CANVAS_TEXT,
gail_canvas_text_factory_get_type ());
atk_registry_set_factory_type (atk_get_default_registry (),
GNOME_TYPE_CANVAS_RICH_TEXT,
gail_canvas_text_factory_get_type ());
atk_registry_set_factory_type (atk_get_default_registry (),
GNOME_TYPE_CANVAS_WIDGET,
gail_canvas_widget_factory_get_type ());
atk_registry_set_factory_type (atk_get_default_registry (),
GNOME_TYPE_CANVAS_ITEM,
gail_canvas_item_factory_get_type ());
}
static void
gail_canvas_class_init (GailCanvasClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
parent_atk_object_class = g_type_class_peek_parent (klass);
class->get_n_children = gail_canvas_get_n_children;
class->ref_child = gail_canvas_ref_child;
class->initialize = gail_canvas_real_initialize;
}
AtkObject*
gail_canvas_new (GtkWidget *widget)
{
GObject *object;
AtkObject *accessible;
g_return_val_if_fail (GNOME_IS_CANVAS (widget), NULL);
object = g_object_new (GAIL_TYPE_CANVAS, NULL);
accessible = ATK_OBJECT (object);
atk_object_initialize (accessible, widget);
return accessible;
}
static void
gail_canvas_real_initialize (AtkObject *obj,
gpointer data)
{
GnomeCanvas *canvas;
GtkAdjustment *adj;
parent_atk_object_class->initialize (obj, data);
canvas = GNOME_CANVAS (data);
adj = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas));
g_signal_connect (adj,
"value_changed",
G_CALLBACK (adjustment_changed),
canvas);
adj = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas));
g_signal_connect (adj,
"value_changed",
G_CALLBACK (adjustment_changed),
canvas);
obj->role = ATK_ROLE_LAYERED_PANE;
}
static gint
gail_canvas_get_n_children (AtkObject* obj)
{
GtkAccessible *accessible;
GtkWidget *widget;
GnomeCanvas *canvas;
GnomeCanvasGroup *root_group;
g_return_val_if_fail (GAIL_IS_CANVAS (obj), 0);
accessible = GTK_ACCESSIBLE (obj);
widget = gtk_accessible_get_widget (accessible);
if (widget == NULL)
/* State is defunct */
return 0;
g_return_val_if_fail (GNOME_IS_CANVAS (widget), 0);
canvas = GNOME_CANVAS (widget);
root_group = gnome_canvas_root (canvas);
g_return_val_if_fail (root_group, 0);
return 1;
}
static AtkObject*
gail_canvas_ref_child (AtkObject *obj,
gint i)
{
GtkAccessible *accessible;
GtkWidget *widget;
GnomeCanvas *canvas;
GnomeCanvasGroup *root_group;
AtkObject *atk_object;
/* Canvas only has one child, so return NULL if anything else is requested */
if (i != 0)
return NULL;
g_return_val_if_fail (GAIL_IS_CANVAS (obj), NULL);
accessible = GTK_ACCESSIBLE (obj);
widget = gtk_accessible_get_widget (accessible);
if (widget == NULL)
/* State is defunct */
return NULL;
g_return_val_if_fail (GNOME_IS_CANVAS (widget), NULL);
canvas = GNOME_CANVAS (widget);
root_group = gnome_canvas_root (canvas);
g_return_val_if_fail (root_group, NULL);
atk_object = atk_gobject_accessible_for_object (G_OBJECT (root_group));
g_object_ref (atk_object);
return atk_object;
}
static void
adjustment_changed (GtkAdjustment *adjustment,
GnomeCanvas *canvas)
{
AtkObject *atk_obj;
/*
* The scrollbars have changed
*/
atk_obj = gtk_widget_get_accessible (GTK_WIDGET (canvas));
g_signal_emit_by_name (atk_obj, "visible_data_changed");
}
