/* GTK+ - accessibility implementations * Copyright 2001 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, see <http://www.gnu.org/licenses/>. */ #include "config.h" #include "gtkaccessibility.h" #include "gtkaccessibilityutil.h" #include "gtkaccessibilitymisc.h" #include "gtkwindowaccessible.h" #include <stdio.h> #include <stdlib.h> #include <gdk/gdk.h> #include <gtk/gtkcombobox.h> #include <gtk/gtkentry.h> #include <gtk/gtknotebook.h> #include <gtk/gtkmenuitem.h> #include <gtk/gtkmenu.h> #include <gtk/gtkmenubar.h> #include <gtk/gtksocket.h> #include <gtk/gtktogglebutton.h> #include <gtk/gtkaccessible.h> #ifdef GDK_WINDOWING_X11 #include <atk-bridge.h> #endif static gboolean gail_focus_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data); static gboolean gail_select_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data); static gboolean gail_deselect_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data); static gboolean gail_switch_page_watcher(GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data); static void gail_finish_select (GtkWidget *widget); static void gail_map_cb (GtkWidget *widget); static void gail_map_submenu_cb (GtkWidget *widget); static gint gail_focus_idle_handler (gpointer data); static void gail_focus_notify (GtkWidget *widget); static void gail_focus_notify_when_idle (GtkWidget *widget); static void gail_focus_tracker_init (void); static void gail_focus_object_destroyed (gpointer data); static void gail_focus_tracker (AtkObject *object); static void gail_set_focus_widget (GtkWidget *focus_widget, GtkWidget *widget); static void gail_set_focus_object (AtkObject *focus_obj, AtkObject *obj); GtkWidget* _focus_widget = NULL; static GtkWidget* next_focus_widget = NULL; static gboolean was_deselect = FALSE; static GtkWidget* subsequent_focus_widget = NULL; static GtkWidget* focus_before_menu = NULL; static guint focus_notify_handler = 0; static guint focus_tracker_id = 0; static GQuark quark_focus_object = 0; static int initialized = FALSE; static AtkObject* get_accessible_for_widget (GtkWidget *widget, gboolean *transient) { AtkObject *obj = NULL; *transient = FALSE; if (!widget) return NULL; if (GTK_IS_ENTRY (widget)) ; else if (GTK_IS_NOTEBOOK (widget)) { GtkNotebook *notebook; gint page_num = -1; notebook = GTK_NOTEBOOK (widget); page_num = gtk_notebook_get_current_page (notebook); if (page_num != -1) { obj = gtk_widget_get_accessible (widget); obj = atk_object_ref_accessible_child (obj, page_num); g_object_unref (obj); } } else if (GTK_IS_TOGGLE_BUTTON (widget)) { GtkWidget *other_widget = gtk_widget_get_parent (widget); if (GTK_IS_COMBO_BOX (other_widget)) { gail_set_focus_widget (other_widget, widget); widget = other_widget; } } if (obj == NULL) { AtkObject *focus_object; obj = gtk_widget_get_accessible (widget); focus_object = g_object_get_qdata (G_OBJECT (obj), quark_focus_object); /* * We check whether the object for this focus_object has been deleted. * This can happen when navigating to an empty directory in nautilus. * See bug #141907. */ if (ATK_IS_GOBJECT_ACCESSIBLE (focus_object)) { if (!atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (focus_object))) focus_object = NULL; } if (focus_object) obj = focus_object; } return obj; } static gboolean gail_focus_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data) { GObject *object; GtkWidget *widget; GdkEvent *event; object = g_value_get_object (param_values + 0); g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE); event = g_value_get_boxed (param_values + 1); widget = GTK_WIDGET (object); if (event->type == GDK_FOCUS_CHANGE) { if (event->focus_change.in) { if (GTK_IS_WINDOW (widget)) { GtkWidget *focus_widget; GtkWindow *window; GtkWindowType type; window = GTK_WINDOW (widget); focus_widget = gtk_window_get_focus (window); g_object_get (window, "type", &type, NULL); if (focus_widget) { /* * If we already have a potential focus widget set this * windows's focus widget to focus_before_menu so that * it will be reported when menu item is unset. */ if (next_focus_widget) { if (GTK_IS_MENU_ITEM (next_focus_widget) && !focus_before_menu) { void *vp_focus_before_menu = &focus_before_menu; focus_before_menu = focus_widget; g_object_add_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu); } return TRUE; } widget = focus_widget; } else if (type == GTK_WINDOW_POPUP) { if (GTK_IS_BIN (widget)) { GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget)); if (GTK_IS_WIDGET (child) && gtk_widget_has_grab (child)) { if (GTK_IS_MENU_SHELL (child)) { if (gtk_menu_shell_get_selected_item (GTK_MENU_SHELL (child))) { /* * We have a menu which has a menu item selected * so we do not report focus on the menu. */ return TRUE; } } widget = child; } } else /* popup window has no children; this edge case occurs in some custom code (OOo for instance) */ { return TRUE; } } else /* Widget is a non-popup toplevel with no focus children; don't emit for this case either, as it's useless */ { return TRUE; } } } else { if (next_focus_widget) { GtkWidget *toplevel; toplevel = gtk_widget_get_toplevel (next_focus_widget); if (toplevel == widget) next_focus_widget = NULL; } /* focus out */ widget = NULL; } } else { if (event->type == GDK_MOTION_NOTIFY && gtk_widget_has_focus (widget)) { if (widget == _focus_widget) { return TRUE; } } else { return TRUE; } } #ifdef GDK_WINDOWING_X11 /* * If the focus widget is a GtkSocket without a plug * then ignore the focus notification as the embedded * plug will report a focus notification. */ if (GTK_IS_SOCKET (widget) && gtk_socket_get_plug_window (GTK_SOCKET (widget)) != NULL) return TRUE; #endif /* * The widget may not yet be visible on the screen so we wait until it is. */ gail_focus_notify_when_idle (widget); return TRUE; } static gboolean gail_select_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data) { GObject *object; GtkWidget *widget; object = g_value_get_object (param_values + 0); g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE); widget = GTK_WIDGET (object); if (!gtk_widget_get_mapped (widget)) { g_signal_connect (widget, "map", G_CALLBACK (gail_map_cb), NULL); } else gail_finish_select (widget); return TRUE; } static void gail_finish_select (GtkWidget *widget) { if (GTK_IS_MENU_ITEM (widget)) { GtkMenuItem* menu_item; GtkWidget *submenu; menu_item = GTK_MENU_ITEM (widget); submenu = gtk_menu_item_get_submenu (menu_item); if (submenu && !gtk_widget_get_mapped (submenu)) { /* * If the submenu is not visble, wait until it is before * reporting focus on the menu item. */ gulong handler_id; handler_id = g_signal_handler_find (submenu, G_SIGNAL_MATCH_FUNC, g_signal_lookup ("map", GTK_TYPE_WINDOW), 0, NULL, (gpointer) gail_map_submenu_cb, NULL); if (!handler_id) g_signal_connect (submenu, "map", G_CALLBACK (gail_map_submenu_cb), NULL); return; } /* * If we are waiting to report focus on a menubar or a menu item * because of a previous deselect, cancel it. */ if (was_deselect && focus_notify_handler && next_focus_widget && (GTK_IS_MENU_BAR (next_focus_widget) || GTK_IS_MENU_ITEM (next_focus_widget))) { void *vp_next_focus_widget = &next_focus_widget; g_source_remove (focus_notify_handler); g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget); next_focus_widget = NULL; focus_notify_handler = 0; was_deselect = FALSE; } } /* * If previously focused widget is not a GtkMenuItem or a GtkMenu, * keep track of it so we can return to it after menubar is deactivated */ if (_focus_widget && !GTK_IS_MENU_ITEM (_focus_widget) && !GTK_IS_MENU (_focus_widget)) { void *vp_focus_before_menu = &focus_before_menu; focus_before_menu = _focus_widget; g_object_add_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu); } gail_focus_notify_when_idle (widget); return; } static void gail_map_cb (GtkWidget *widget) { gail_finish_select (widget); } static void gail_map_submenu_cb (GtkWidget *widget) { if (GTK_IS_MENU (widget)) { GtkWidget *parent_menu_item; parent_menu_item = gtk_menu_get_attach_widget (GTK_MENU (widget)); if (parent_menu_item) gail_finish_select (parent_menu_item); } } static gboolean gail_deselect_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data) { GObject *object; GtkWidget *widget; GtkWidget *menu_shell; object = g_value_get_object (param_values + 0); g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE); widget = GTK_WIDGET (object); if (!GTK_IS_MENU_ITEM (widget)) return TRUE; if (subsequent_focus_widget == widget) subsequent_focus_widget = NULL; menu_shell = gtk_widget_get_parent (widget); if (GTK_IS_MENU_SHELL (menu_shell)) { GtkWidget *parent_menu_shell; parent_menu_shell = gtk_menu_shell_get_parent_shell (GTK_MENU_SHELL (menu_shell)); if (parent_menu_shell) { GtkWidget *active_menu_item; active_menu_item = gtk_menu_shell_get_selected_item (GTK_MENU_SHELL (parent_menu_shell)); if (active_menu_item) { gail_focus_notify_when_idle (active_menu_item); } } else { if (!GTK_IS_MENU_BAR (menu_shell)) { gail_focus_notify_when_idle (menu_shell); } } } was_deselect = TRUE; return TRUE; } static gboolean gail_switch_page_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data) { GObject *object; GtkWidget *widget; object = g_value_get_object (param_values + 0); g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE); widget = GTK_WIDGET (object); if (!GTK_IS_NOTEBOOK (widget)) return TRUE; if (gtk_notebook_get_current_page (GTK_NOTEBOOK (widget)) == -1) return TRUE; gail_focus_notify_when_idle (widget); return TRUE; } static gboolean gail_focus_idle_handler (gpointer data) { focus_notify_handler = 0; /* * The widget which was to receive focus may have been removed */ if (!next_focus_widget) { if (next_focus_widget != data) return FALSE; } else { void *vp_next_focus_widget = &next_focus_widget; g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget); next_focus_widget = NULL; } gail_focus_notify (data); return FALSE; } static void gail_focus_notify (GtkWidget *widget) { AtkObject *atk_obj; gboolean transient; if (widget != _focus_widget) { if (_focus_widget) { void *vp_focus_widget = &_focus_widget; g_object_remove_weak_pointer (G_OBJECT (_focus_widget), vp_focus_widget); } _focus_widget = widget; if (_focus_widget) { void *vp_focus_widget = &_focus_widget; g_object_add_weak_pointer (G_OBJECT (_focus_widget), vp_focus_widget); /* * The UI may not have been updated yet; e.g. in gtkhtml2 * html_view_layout() is called in a idle handler */ if (_focus_widget == focus_before_menu) { void *vp_focus_before_menu = &focus_before_menu; g_object_remove_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu); focus_before_menu = NULL; } } gail_focus_notify_when_idle (_focus_widget); } else { if (_focus_widget) atk_obj = get_accessible_for_widget (_focus_widget, &transient); else atk_obj = NULL; /* * Do not report focus on redundant object */ G_GNUC_BEGIN_IGNORE_DEPRECATIONS; if (atk_obj && (atk_object_get_role(atk_obj) != ATK_ROLE_REDUNDANT_OBJECT)) atk_focus_tracker_notify (atk_obj); G_GNUC_END_IGNORE_DEPRECATIONS; if (atk_obj && transient) g_object_unref (atk_obj); if (subsequent_focus_widget) { GtkWidget *tmp_widget = subsequent_focus_widget; subsequent_focus_widget = NULL; gail_focus_notify_when_idle (tmp_widget); } } } static void gail_focus_notify_when_idle (GtkWidget *widget) { if (focus_notify_handler) { if (widget) { /* * Ignore focus request when menu item is going to be focused. * See bug #124232. */ if (GTK_IS_MENU_ITEM (next_focus_widget) && !GTK_IS_MENU_ITEM (widget)) return; if (next_focus_widget) { if (GTK_IS_MENU_ITEM (next_focus_widget) && GTK_IS_MENU_ITEM (widget)) { if (gtk_menu_item_get_submenu (GTK_MENU_ITEM (next_focus_widget)) == gtk_widget_get_parent (widget)) { if (subsequent_focus_widget) g_assert_not_reached (); subsequent_focus_widget = widget; return; } } } g_source_remove (focus_notify_handler); if (next_focus_widget) { void *vp_next_focus_widget = &next_focus_widget; g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget); next_focus_widget = NULL; } } else /* * Ignore if focus is being set to NULL and we are waiting to set focus */ return; } if (widget) { void *vp_next_focus_widget = &next_focus_widget; next_focus_widget = widget; g_object_add_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget); } else { /* * We are about to report focus as NULL so remove the weak pointer * for the widget we were waiting to report focus on. */ if (next_focus_widget) { void *vp_next_focus_widget = &next_focus_widget; g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget); next_focus_widget = NULL; } } focus_notify_handler = gdk_threads_add_idle (gail_focus_idle_handler, widget); g_source_set_name_by_id (focus_notify_handler, "[gtk+] gail_focus_idle_handler"); } static gboolean gail_deactivate_watcher (GSignalInvocationHint *ihint, guint n_param_values, const GValue *param_values, gpointer data) { GObject *object; GtkWidget *widget; GtkMenuShell *shell; GtkWidget *focus = NULL; object = g_value_get_object (param_values + 0); g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE); widget = GTK_WIDGET (object); g_return_val_if_fail (GTK_IS_MENU_SHELL(widget), TRUE); shell = GTK_MENU_SHELL(widget); if (! gtk_menu_shell_get_parent_shell (shell)) focus = focus_before_menu; /* * If we are waiting to report focus on a menubar or a menu item * because of a previous deselect, cancel it. */ if (was_deselect && focus_notify_handler && next_focus_widget && (GTK_IS_MENU_BAR (next_focus_widget) || GTK_IS_MENU_ITEM (next_focus_widget))) { void *vp_next_focus_widget = &next_focus_widget; g_source_remove (focus_notify_handler); g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget); next_focus_widget = NULL; focus_notify_handler = 0; was_deselect = FALSE; } gail_focus_notify_when_idle (focus); return TRUE; } static void gail_focus_tracker_init (void) { static gboolean emission_hooks_added = FALSE; if (!emission_hooks_added) { /* * We cannot be sure that the classes exist so we make sure that they do. */ g_type_class_ref (GTK_TYPE_WIDGET); g_type_class_ref (GTK_TYPE_MENU_ITEM); g_type_class_ref (GTK_TYPE_MENU_SHELL); g_type_class_ref (GTK_TYPE_NOTEBOOK); /* * We listen for event_after signal and then check that the * event was a focus in event so we get called after the event. */ g_signal_add_emission_hook ( g_signal_lookup ("event-after", GTK_TYPE_WIDGET), 0, gail_focus_watcher, NULL, (GDestroyNotify) NULL); /* * A "select" signal is emitted when arrow key is used to * move to a list item in the popup window of a GtkCombo or * a menu item in a menu. */ g_signal_add_emission_hook ( g_signal_lookup ("select", GTK_TYPE_MENU_ITEM), 0, gail_select_watcher, NULL, (GDestroyNotify) NULL); /* * A "deselect" signal is emitted when arrow key is used to * move from a menu item in a menu to the parent menu. */ g_signal_add_emission_hook ( g_signal_lookup ("deselect", GTK_TYPE_MENU_ITEM), 0, gail_deselect_watcher, NULL, (GDestroyNotify) NULL); /* * We listen for deactivate signals on menushells to determine * when the "focus" has left the menus. */ g_signal_add_emission_hook ( g_signal_lookup ("deactivate", GTK_TYPE_MENU_SHELL), 0, gail_deactivate_watcher, NULL, (GDestroyNotify) NULL); /* * We listen for "switch-page" signal on a GtkNotebook to notify * when page has changed because of clicking on a notebook tab. */ g_signal_add_emission_hook ( g_signal_lookup ("switch-page", GTK_TYPE_NOTEBOOK), 0, gail_switch_page_watcher, NULL, (GDestroyNotify) NULL); emission_hooks_added = TRUE; } } static void gail_focus_object_destroyed (gpointer data) { GObject *obj; obj = G_OBJECT (data); g_object_set_qdata (obj, quark_focus_object, NULL); g_object_unref (obj); } static void gail_focus_tracker (AtkObject *focus_object) { /* * Do not report focus on redundant object */ if (focus_object && (atk_object_get_role(focus_object) != ATK_ROLE_REDUNDANT_OBJECT)) { AtkObject *old_focus_object; if (!GTK_IS_ACCESSIBLE (focus_object)) { AtkObject *parent; parent = focus_object; while (1) { parent = atk_object_get_parent (parent); if (parent == NULL) break; if (GTK_IS_ACCESSIBLE (parent)) break; } if (parent) { gail_set_focus_object (focus_object, parent); } } else { old_focus_object = g_object_get_qdata (G_OBJECT (focus_object), quark_focus_object); if (old_focus_object) { g_object_weak_unref (G_OBJECT (old_focus_object), (GWeakNotify) gail_focus_object_destroyed, focus_object); g_object_set_qdata (G_OBJECT (focus_object), quark_focus_object, NULL); g_object_unref (G_OBJECT (focus_object)); } } } } static void gail_set_focus_widget (GtkWidget *focus_widget, GtkWidget *widget) { AtkObject *focus_obj; AtkObject *obj; focus_obj = gtk_widget_get_accessible (focus_widget); obj = gtk_widget_get_accessible (widget); gail_set_focus_object (focus_obj, obj); } static void gail_set_focus_object (AtkObject *focus_obj, AtkObject *obj) { AtkObject *old_focus_obj; old_focus_obj = g_object_get_qdata (G_OBJECT (obj), quark_focus_object); if (old_focus_obj != obj) { if (old_focus_obj) g_object_weak_unref (G_OBJECT (old_focus_obj), (GWeakNotify) gail_focus_object_destroyed, obj); else /* * We call g_object_ref as if obj is destroyed * while the weak reference exists then destroying the * focus_obj would cause gail_focus_object_destroyed to be * called when obj is not a valid GObject. */ g_object_ref (obj); g_object_weak_ref (G_OBJECT (focus_obj), (GWeakNotify) gail_focus_object_destroyed, obj); g_object_set_qdata (G_OBJECT (obj), quark_focus_object, focus_obj); } } static gboolean state_event_watcher (GSignalInvocationHint *hint, guint n_param_values, const GValue *param_values, gpointer data) { GObject *object; GtkWidget *widget; AtkObject *atk_obj; AtkObject *parent; GdkEventWindowState *event; gchar *signal_name; object = g_value_get_object (param_values + 0); if (!GTK_IS_WINDOW (object)) return FALSE; event = g_value_get_boxed (param_values + 1); if (event->type == GDK_WINDOW_STATE) return FALSE; widget = GTK_WIDGET (object); if (event->new_window_state & GDK_WINDOW_STATE_MAXIMIZED) signal_name = "maximize"; else if (event->new_window_state & GDK_WINDOW_STATE_ICONIFIED) signal_name = "minimize"; else if (event->new_window_state == 0) signal_name = "restore"; else return TRUE; atk_obj = gtk_widget_get_accessible (widget); if (GTK_IS_WINDOW_ACCESSIBLE (atk_obj)) { parent = atk_object_get_parent (atk_obj); if (parent == atk_get_root ()) g_signal_emit_by_name (atk_obj, signal_name); return TRUE; } return FALSE; } static gboolean configure_event_watcher (GSignalInvocationHint *hint, guint n_param_values, const GValue *param_values, gpointer data) { GtkAllocation allocation; GObject *object; GtkWidget *widget; AtkObject *atk_obj; AtkObject *parent; GdkEvent *event; gchar *signal_name; object = g_value_get_object (param_values + 0); if (!GTK_IS_WINDOW (object)) return FALSE; event = g_value_get_boxed (param_values + 1); if (event->type != GDK_CONFIGURE) return FALSE; widget = GTK_WIDGET (object); gtk_widget_get_allocation (widget, &allocation); if (allocation.x == ((GdkEventConfigure *)event)->x && allocation.y == ((GdkEventConfigure *)event)->y && allocation.width == ((GdkEventConfigure *)event)->width && allocation.height == ((GdkEventConfigure *)event)->height) return TRUE; if (allocation.width != ((GdkEventConfigure *)event)->width || allocation.height != ((GdkEventConfigure *)event)->height) signal_name = "resize"; else signal_name = "move"; atk_obj = gtk_widget_get_accessible (widget); if (GTK_IS_WINDOW_ACCESSIBLE (atk_obj)) { parent = atk_object_get_parent (atk_obj); if (parent == atk_get_root ()) g_signal_emit_by_name (atk_obj, signal_name); return TRUE; } return FALSE; } static gboolean window_focus (GtkWidget *widget, GdkEventFocus *event) { AtkObject *atk_obj; g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); atk_obj = gtk_widget_get_accessible (widget); g_signal_emit_by_name (atk_obj, event->in ? "activate" : "deactivate"); return FALSE; } static void window_added (AtkObject *atk_obj, guint index, AtkObject *child) { GtkWidget *widget; if (!GTK_IS_WINDOW_ACCESSIBLE (child)) return; widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child)); if (!widget) return; g_signal_connect (widget, "focus-in-event", (GCallback) window_focus, NULL); g_signal_connect (widget, "focus-out-event", (GCallback) window_focus, NULL); g_signal_emit_by_name (child, "create"); } static void window_removed (AtkObject *atk_obj, guint index, AtkObject *child) { GtkWidget *widget; GtkWindow *window; if (!GTK_IS_WINDOW_ACCESSIBLE (child)) return; widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child)); if (!widget) return; window = GTK_WINDOW (widget); /* * Deactivate window if it is still focused and we are removing it. This * can happen when a dialog displayed by gok is removed. */ if (gtk_window_is_active (window) && gtk_window_has_toplevel_focus (window)) g_signal_emit_by_name (child, "deactivate"); g_signal_handlers_disconnect_by_func (widget, (gpointer) window_focus, NULL); g_signal_emit_by_name (child, "destroy"); } static void do_window_event_initialization (void) { AtkObject *root; g_type_class_ref (GTK_TYPE_WINDOW_ACCESSIBLE); g_signal_add_emission_hook (g_signal_lookup ("window-state-event", GTK_TYPE_WIDGET), 0, state_event_watcher, NULL, (GDestroyNotify) NULL); g_signal_add_emission_hook (g_signal_lookup ("configure-event", GTK_TYPE_WIDGET), 0, configure_event_watcher, NULL, (GDestroyNotify) NULL); root = atk_get_root (); g_signal_connect (root, "children-changed::add", (GCallback) window_added, NULL); g_signal_connect (root, "children-changed::remove", (GCallback) window_removed, NULL); } void _gtk_accessibility_init (void) { if (initialized) return; initialized = TRUE; quark_focus_object = g_quark_from_static_string ("gail-focus-object"); G_GNUC_BEGIN_IGNORE_DEPRECATIONS; atk_focus_tracker_init (gail_focus_tracker_init); focus_tracker_id = atk_add_focus_tracker (gail_focus_tracker); G_GNUC_END_IGNORE_DEPRECATIONS; _gtk_accessibility_override_atk_util (); do_window_event_initialization (); #ifdef GDK_WINDOWING_X11 atk_bridge_adaptor_init (NULL, NULL); #endif atk_misc_instance = g_object_new (GTK_TYPE_MISC_IMPL, NULL); }