/* 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. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #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"); }