1 /* GAIL - The GNOME Accessibility Implementation Library
2 * Copyright 2001 Sun Microsystems Inc.
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.
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.
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.
27 #include "gailfactory.h"
29 #define GNOME_ACCESSIBILITY_ENV "GNOME_ACCESSIBILITY"
30 #define NO_GAIL_ENV "NO_GAIL"
32 static gboolean gail_focus_watcher (GSignalInvocationHint *ihint,
34 const GValue *param_values,
36 static gboolean gail_select_watcher (GSignalInvocationHint *ihint,
38 const GValue *param_values,
40 static gboolean gail_deselect_watcher (GSignalInvocationHint *ihint,
42 const GValue *param_values,
44 static gboolean gail_switch_page_watcher(GSignalInvocationHint *ihint,
46 const GValue *param_values,
48 static AtkObject* gail_get_accessible_for_widget (GtkWidget *widget,
50 static void gail_finish_select (GtkWidget *widget);
51 static void gail_map_cb (GtkWidget *widget);
52 static void gail_map_submenu_cb (GtkWidget *widget);
53 static gint gail_focus_idle_handler (gpointer data);
54 static void gail_focus_notify (GtkWidget *widget);
55 static void gail_focus_notify_when_idle (GtkWidget *widget);
57 static void gail_focus_tracker_init (void);
58 static void gail_focus_object_destroyed (gpointer data);
59 static void gail_focus_tracker (AtkObject *object);
60 static void gail_set_focus_widget (GtkWidget *focus_widget,
62 static void gail_set_focus_object (AtkObject *focus_obj,
65 GtkWidget* focus_widget = NULL;
66 static GtkWidget* next_focus_widget = NULL;
67 static gboolean was_deselect = FALSE;
68 static GtkWidget* subsequent_focus_widget = NULL;
69 static GtkWidget* focus_before_menu = NULL;
70 static guint focus_notify_handler = 0;
71 static guint focus_tracker_id = 0;
72 static GQuark quark_focus_object = 0;
74 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_WIDGET, GailWidget, gail_widget, GTK_TYPE_WIDGET)
75 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_CONTAINER, GailContainer, gail_container, GTK_TYPE_CONTAINER)
76 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_BUTTON, GailButton, gail_button, GTK_TYPE_BUTTON)
77 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_LINK_BUTTON, GailLinkButton, gail_link_button, GTK_TYPE_LINK_BUTTON)
78 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_MENU_ITEM, GailMenuItem, gail_menu_item, gail_menu_item_new)
79 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TOGGLE_BUTTON, GailToggleButton, gail_toggle_button, GTK_TYPE_TOGGLE_BUTTON)
80 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_IMAGE, GailImage, gail_image, GTK_TYPE_IMAGE)
81 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TEXT_VIEW, GailTextView, gail_text_view, GTK_TYPE_TEXT_VIEW)
82 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_COMBO_BOX, GailComboBox, gail_combo_box, GTK_TYPE_COMBO_BOX)
83 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_ENTRY, GailEntry, gail_entry, GTK_TYPE_ENTRY)
84 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_MENU_SHELL, GailMenuShell, gail_menu_shell, GTK_TYPE_MENU_SHELL)
85 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_MENU, GailMenu, gail_menu, GTK_TYPE_MENU)
86 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_WINDOW, GailWindow, gail_window, GTK_TYPE_BIN)
87 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_RANGE, GailRange, gail_range, GTK_TYPE_RANGE)
88 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCALE, GailScale, gail_scale, GTK_TYPE_SCALE)
89 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCALE_BUTTON, GailScaleButton, gail_scale_button, GTK_TYPE_SCALE_BUTTON)
90 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_LABEL, GailLabel, gail_label, GTK_TYPE_LABEL)
91 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_STATUSBAR, GailStatusbar, gail_statusbar, GTK_TYPE_STATUSBAR)
92 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_NOTEBOOK, GailNotebook, gail_notebook, GTK_TYPE_NOTEBOOK)
93 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_CALENDAR, GailCalendar, gail_calendar, GTK_TYPE_CALENDAR)
94 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_PROGRESS_BAR, GailProgressBar, gail_progress_bar, GTK_TYPE_PROGRESS_BAR)
95 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SPIN_BUTTON, GailSpinButton, gail_spin_button, GTK_TYPE_SPIN_BUTTON)
96 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_TREE_VIEW, GailTreeView, gail_tree_view, GTK_TYPE_TREE_VIEW)
97 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_FRAME, GailFrame, gail_frame, GTK_TYPE_FRAME)
98 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_RADIO_BUTTON, GailRadioButton, gail_radio_button, GTK_TYPE_RADIO_BUTTON)
99 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_ARROW, GailArrow, gail_arrow, GTK_TYPE_ARROW)
100 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SEPARATOR, GailSeparator, gail_separator, GTK_TYPE_SEPARATOR)
101 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_BOX, GailBox, gail_box, GTK_TYPE_BOX)
102 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCROLLED_WINDOW, GailScrolledWindow, gail_scrolled_window, GTK_TYPE_SCROLLED_WINDOW)
103 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_PANED, GailPaned, gail_paned, GTK_TYPE_PANED)
104 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_SCROLLBAR, GailScrollbar, gail_scrollbar, GTK_TYPE_SCROLLBAR)
105 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_CHECK_MENU_ITEM, GailCheckMenuItem, gail_check_menu_item, gail_check_menu_item_new)
106 GAIL_IMPLEMENT_FACTORY_WITH_FUNC (GAIL_TYPE_RADIO_MENU_ITEM, GailRadioMenuItem, gail_radio_menu_item, gail_radio_menu_item_new)
107 GAIL_IMPLEMENT_FACTORY (GAIL_TYPE_EXPANDER, GailExpander, gail_expander, GTK_TYPE_EXPANDER)
108 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_RENDERER_CELL, GailRendererCell, gail_renderer_cell, GTK_TYPE_CELL_RENDERER, gail_renderer_cell_new)
109 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_BOOLEAN_CELL, GailBooleanCell, gail_boolean_cell, GTK_TYPE_CELL_RENDERER_TOGGLE, gail_boolean_cell_new)
110 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_IMAGE_CELL, GailImageCell, gail_image_cell, GTK_TYPE_CELL_RENDERER_PIXBUF, gail_image_cell_new)
111 GAIL_IMPLEMENT_FACTORY_WITH_FUNC_DUMMY (GAIL_TYPE_TEXT_CELL, GailTextCell, gail_text_cell, GTK_TYPE_CELL_RENDERER_TEXT, gail_text_cell_new)
114 gail_get_accessible_for_widget (GtkWidget *widget,
117 AtkObject *obj = NULL;
120 gnome_canvas = g_type_from_name ("GnomeCanvas");
126 if (GTK_IS_ENTRY (widget))
128 else if (GTK_IS_NOTEBOOK (widget))
130 GtkNotebook *notebook;
133 notebook = GTK_NOTEBOOK (widget);
134 page_num = gtk_notebook_get_current_page (notebook);
137 obj = gtk_widget_get_accessible (widget);
138 obj = atk_object_ref_accessible_child (obj, page_num);
139 g_object_unref (obj);
142 else if (G_TYPE_CHECK_INSTANCE_TYPE ((widget), gnome_canvas))
144 GObject *focused_item;
145 GValue value = {0, };
147 g_value_init (&value, G_TYPE_OBJECT);
148 g_object_get_property (G_OBJECT (widget), "focused_item", &value);
149 focused_item = g_value_get_object (&value);
155 obj = atk_gobject_accessible_for_object (G_OBJECT (focused_item));
156 tmp = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
161 else if (GTK_IS_TOGGLE_BUTTON (widget))
163 GtkWidget *other_widget = gtk_widget_get_parent (widget);
164 if (GTK_IS_COMBO_BOX (other_widget))
166 gail_set_focus_widget (other_widget, widget);
167 widget = other_widget;
172 AtkObject *focus_object;
174 obj = gtk_widget_get_accessible (widget);
175 focus_object = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
177 * We check whether the object for this focus_object has been deleted.
178 * This can happen when navigating to an empty directory in nautilus.
181 if (ATK_IS_GOBJECT_ACCESSIBLE (focus_object))
183 if (!atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (focus_object)))
194 gail_focus_watcher (GSignalInvocationHint *ihint,
195 guint n_param_values,
196 const GValue *param_values,
203 object = g_value_get_object (param_values + 0);
204 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
206 event = g_value_get_boxed (param_values + 1);
207 widget = GTK_WIDGET (object);
209 if (event->type == GDK_FOCUS_CHANGE)
211 if (event->focus_change.in)
213 if (GTK_IS_WINDOW (widget))
215 GtkWidget *focus_widget;
219 window = GTK_WINDOW (widget);
220 focus_widget = gtk_window_get_focus (window);
221 g_object_get (window, "type", &type, NULL);
226 * If we already have a potential focus widget set this
227 * windows's focus widget to focus_before_menu so that
228 * it will be reported when menu item is unset.
230 if (next_focus_widget)
232 if (GTK_IS_MENU_ITEM (next_focus_widget) &&
235 void *vp_focus_before_menu = &focus_before_menu;
236 focus_before_menu = focus_widget;
237 g_object_add_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
242 widget = focus_widget;
244 else if (type == GTK_WINDOW_POPUP)
246 if (GTK_IS_BIN (widget))
248 GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget));
250 if (GTK_IS_WIDGET (child) && gtk_widget_has_grab (child))
252 if (GTK_IS_MENU_SHELL (child))
254 if (gtk_menu_shell_get_selected_item (GTK_MENU_SHELL (child)))
257 * We have a menu which has a menu item selected
258 * so we do not report focus on the menu.
266 else /* popup window has no children; this edge case occurs in some custom code (OOo for instance) */
271 else /* Widget is a non-popup toplevel with no focus children;
272 don't emit for this case either, as it's useless */
280 if (next_focus_widget)
284 toplevel = gtk_widget_get_toplevel (next_focus_widget);
285 if (toplevel == widget)
286 next_focus_widget = NULL;
294 if (event->type == GDK_MOTION_NOTIFY && gtk_widget_has_focus (widget))
296 if (widget == focus_widget)
307 #ifdef GDK_WINDOWING_X11
309 * If the focus widget is a GtkSocket without a plug
310 * then ignore the focus notification as the embedded
311 * plug will report a focus notification.
313 if (GTK_IS_SOCKET (widget) &&
314 gtk_socket_get_plug_window (GTK_SOCKET (widget)) != NULL)
319 * The widget may not yet be visible on the screen so we wait until it is.
321 gail_focus_notify_when_idle (widget);
326 gail_select_watcher (GSignalInvocationHint *ihint,
327 guint n_param_values,
328 const GValue *param_values,
334 object = g_value_get_object (param_values + 0);
335 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
337 widget = GTK_WIDGET (object);
339 if (!gtk_widget_get_mapped (widget))
341 g_signal_connect (widget, "map",
342 G_CALLBACK (gail_map_cb),
346 gail_finish_select (widget);
352 gail_finish_select (GtkWidget *widget)
354 if (GTK_IS_MENU_ITEM (widget))
356 GtkMenuItem* menu_item;
359 menu_item = GTK_MENU_ITEM (widget);
360 submenu = gtk_menu_item_get_submenu (menu_item);
362 !gtk_widget_get_mapped (submenu))
365 * If the submenu is not visble, wait until it is before
366 * reporting focus on the menu item.
370 handler_id = g_signal_handler_find (submenu,
372 g_signal_lookup ("map",
376 (gpointer) gail_map_submenu_cb,
379 g_signal_connect (submenu, "map",
380 G_CALLBACK (gail_map_submenu_cb),
385 * If we are waiting to report focus on a menubar or a menu item
386 * because of a previous deselect, cancel it.
389 focus_notify_handler &&
391 (GTK_IS_MENU_BAR (next_focus_widget) ||
392 GTK_IS_MENU_ITEM (next_focus_widget)))
394 void *vp_next_focus_widget = &next_focus_widget;
395 g_source_remove (focus_notify_handler);
396 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
397 next_focus_widget = NULL;
398 focus_notify_handler = 0;
399 was_deselect = FALSE;
403 * If previously focused widget is not a GtkMenuItem or a GtkMenu,
404 * keep track of it so we can return to it after menubar is deactivated
407 !GTK_IS_MENU_ITEM (focus_widget) &&
408 !GTK_IS_MENU (focus_widget))
410 void *vp_focus_before_menu = &focus_before_menu;
411 focus_before_menu = focus_widget;
412 g_object_add_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
415 gail_focus_notify_when_idle (widget);
421 gail_map_cb (GtkWidget *widget)
423 gail_finish_select (widget);
427 gail_map_submenu_cb (GtkWidget *widget)
429 if (GTK_IS_MENU (widget))
431 GtkWidget *parent_menu_item;
433 parent_menu_item = gtk_menu_get_attach_widget (GTK_MENU (widget));
434 if (parent_menu_item)
435 gail_finish_select (parent_menu_item);
441 gail_deselect_watcher (GSignalInvocationHint *ihint,
442 guint n_param_values,
443 const GValue *param_values,
448 GtkWidget *menu_shell;
450 object = g_value_get_object (param_values + 0);
451 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
453 widget = GTK_WIDGET (object);
455 if (!GTK_IS_MENU_ITEM (widget))
458 if (subsequent_focus_widget == widget)
459 subsequent_focus_widget = NULL;
461 menu_shell = gtk_widget_get_parent (widget);
462 if (GTK_IS_MENU_SHELL (menu_shell))
464 GtkWidget *parent_menu_shell;
466 parent_menu_shell = gtk_menu_shell_get_parent_shell (GTK_MENU_SHELL (menu_shell));
467 if (parent_menu_shell)
469 GtkWidget *active_menu_item;
471 active_menu_item = gtk_menu_shell_get_selected_item (GTK_MENU_SHELL (parent_menu_shell));
472 if (active_menu_item)
474 gail_focus_notify_when_idle (active_menu_item);
479 if (!GTK_IS_MENU_BAR (menu_shell))
481 gail_focus_notify_when_idle (menu_shell);
490 gail_switch_page_watcher (GSignalInvocationHint *ihint,
491 guint n_param_values,
492 const GValue *param_values,
498 object = g_value_get_object (param_values + 0);
499 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
501 widget = GTK_WIDGET (object);
503 if (!GTK_IS_NOTEBOOK (widget))
506 if (gtk_notebook_get_current_page (GTK_NOTEBOOK (widget)) == -1)
509 gail_focus_notify_when_idle (widget);
514 gail_focus_idle_handler (gpointer data)
516 focus_notify_handler = 0;
518 * The widget which was to receive focus may have been removed
520 if (!next_focus_widget)
522 if (next_focus_widget != data)
527 void *vp_next_focus_widget = &next_focus_widget;
528 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
529 next_focus_widget = NULL;
532 gail_focus_notify (data);
538 gail_focus_notify (GtkWidget *widget)
543 if (widget != focus_widget)
547 void *vp_focus_widget = &focus_widget;
548 g_object_remove_weak_pointer (G_OBJECT (focus_widget), vp_focus_widget);
550 focus_widget = widget;
553 void *vp_focus_widget = &focus_widget;
554 g_object_add_weak_pointer (G_OBJECT (focus_widget), vp_focus_widget);
556 * The UI may not have been updated yet; e.g. in gtkhtml2
557 * html_view_layout() is called in a idle handler
559 if (focus_widget == focus_before_menu)
561 void *vp_focus_before_menu = &focus_before_menu;
562 g_object_remove_weak_pointer (G_OBJECT (focus_before_menu), vp_focus_before_menu);
563 focus_before_menu = NULL;
566 gail_focus_notify_when_idle (focus_widget);
571 atk_obj = gail_get_accessible_for_widget (focus_widget, &transient);
575 * Do not report focus on redundant object
578 (atk_object_get_role(atk_obj) != ATK_ROLE_REDUNDANT_OBJECT))
579 atk_focus_tracker_notify (atk_obj);
580 if (atk_obj && transient)
581 g_object_unref (atk_obj);
582 if (subsequent_focus_widget)
584 GtkWidget *tmp_widget = subsequent_focus_widget;
585 subsequent_focus_widget = NULL;
586 gail_focus_notify_when_idle (tmp_widget);
592 gail_focus_notify_when_idle (GtkWidget *widget)
594 if (focus_notify_handler)
599 * Ignore focus request when menu item is going to be focused.
602 if (GTK_IS_MENU_ITEM (next_focus_widget) && !GTK_IS_MENU_ITEM (widget))
605 if (next_focus_widget)
607 if (GTK_IS_MENU_ITEM (next_focus_widget) && GTK_IS_MENU_ITEM (widget))
609 if (gtk_menu_item_get_submenu (GTK_MENU_ITEM (next_focus_widget)) == gtk_widget_get_parent (widget))
611 if (subsequent_focus_widget)
612 g_assert_not_reached ();
613 subsequent_focus_widget = widget;
618 g_source_remove (focus_notify_handler);
619 if (next_focus_widget)
621 void *vp_next_focus_widget = &next_focus_widget;
622 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
623 next_focus_widget = NULL;
628 * Ignore if focus is being set to NULL and we are waiting to set focus
635 void *vp_next_focus_widget = &next_focus_widget;
636 next_focus_widget = widget;
637 g_object_add_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
642 * We are about to report focus as NULL so remove the weak pointer
643 * for the widget we were waiting to report focus on.
645 if (next_focus_widget)
647 void *vp_next_focus_widget = &next_focus_widget;
648 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
649 next_focus_widget = NULL;
653 focus_notify_handler = gdk_threads_add_idle (gail_focus_idle_handler, widget);
657 gail_deactivate_watcher (GSignalInvocationHint *ihint,
658 guint n_param_values,
659 const GValue *param_values,
665 GtkWidget *focus = NULL;
667 object = g_value_get_object (param_values + 0);
668 g_return_val_if_fail (GTK_IS_WIDGET(object), FALSE);
669 widget = GTK_WIDGET (object);
671 g_return_val_if_fail (GTK_IS_MENU_SHELL(widget), TRUE);
672 shell = GTK_MENU_SHELL(widget);
673 if (! gtk_menu_shell_get_parent_shell (shell))
674 focus = focus_before_menu;
677 * If we are waiting to report focus on a menubar or a menu item
678 * because of a previous deselect, cancel it.
681 focus_notify_handler &&
683 (GTK_IS_MENU_BAR (next_focus_widget) ||
684 GTK_IS_MENU_ITEM (next_focus_widget)))
686 void *vp_next_focus_widget = &next_focus_widget;
687 g_source_remove (focus_notify_handler);
688 g_object_remove_weak_pointer (G_OBJECT (next_focus_widget), vp_next_focus_widget);
689 next_focus_widget = NULL;
690 focus_notify_handler = 0;
691 was_deselect = FALSE;
693 gail_focus_notify_when_idle (focus);
699 gail_focus_tracker_init (void)
701 static gboolean emission_hooks_added = FALSE;
703 if (!emission_hooks_added)
706 * We cannot be sure that the classes exist so we make sure that they do.
708 g_type_class_ref (GTK_TYPE_WIDGET);
709 g_type_class_ref (GTK_TYPE_MENU_ITEM);
710 g_type_class_ref (GTK_TYPE_MENU_SHELL);
711 g_type_class_ref (GTK_TYPE_NOTEBOOK);
714 * We listen for event_after signal and then check that the
715 * event was a focus in event so we get called after the event.
717 g_signal_add_emission_hook (
718 g_signal_lookup ("event-after", GTK_TYPE_WIDGET), 0,
719 gail_focus_watcher, NULL, (GDestroyNotify) NULL);
721 * A "select" signal is emitted when arrow key is used to
722 * move to a list item in the popup window of a GtkCombo or
723 * a menu item in a menu.
725 g_signal_add_emission_hook (
726 g_signal_lookup ("select", GTK_TYPE_MENU_ITEM), 0,
727 gail_select_watcher, NULL, (GDestroyNotify) NULL);
730 * A "deselect" signal is emitted when arrow key is used to
731 * move from a menu item in a menu to the parent menu.
733 g_signal_add_emission_hook (
734 g_signal_lookup ("deselect", GTK_TYPE_MENU_ITEM), 0,
735 gail_deselect_watcher, NULL, (GDestroyNotify) NULL);
738 * We listen for deactivate signals on menushells to determine
739 * when the "focus" has left the menus.
741 g_signal_add_emission_hook (
742 g_signal_lookup ("deactivate", GTK_TYPE_MENU_SHELL), 0,
743 gail_deactivate_watcher, NULL, (GDestroyNotify) NULL);
746 * We listen for "switch-page" signal on a GtkNotebook to notify
747 * when page has changed because of clicking on a notebook tab.
749 g_signal_add_emission_hook (
750 g_signal_lookup ("switch-page", GTK_TYPE_NOTEBOOK), 0,
751 gail_switch_page_watcher, NULL, (GDestroyNotify) NULL);
752 emission_hooks_added = TRUE;
757 gail_focus_object_destroyed (gpointer data)
761 obj = G_OBJECT (data);
762 g_object_set_qdata (obj, quark_focus_object, NULL);
763 g_object_unref (obj);
767 gail_focus_tracker (AtkObject *focus_object)
770 * Do not report focus on redundant object
773 (atk_object_get_role(focus_object) != ATK_ROLE_REDUNDANT_OBJECT))
775 AtkObject *old_focus_object;
777 if (!GTK_IS_ACCESSIBLE (focus_object))
781 parent = focus_object;
784 parent = atk_object_get_parent (parent);
787 if (GTK_IS_ACCESSIBLE (parent))
793 gail_set_focus_object (focus_object, parent);
798 old_focus_object = g_object_get_qdata (G_OBJECT (focus_object), quark_focus_object);
799 if (old_focus_object)
801 g_object_weak_unref (G_OBJECT (old_focus_object),
802 (GWeakNotify) gail_focus_object_destroyed,
804 g_object_set_qdata (G_OBJECT (focus_object), quark_focus_object, NULL);
805 g_object_unref (G_OBJECT (focus_object));
812 gail_set_focus_widget (GtkWidget *focus_widget,
815 AtkObject *focus_obj;
818 focus_obj = gtk_widget_get_accessible (focus_widget);
819 obj = gtk_widget_get_accessible (widget);
820 gail_set_focus_object (focus_obj, obj);
824 gail_set_focus_object (AtkObject *focus_obj,
827 AtkObject *old_focus_obj;
829 old_focus_obj = g_object_get_qdata (G_OBJECT (obj), quark_focus_object);
830 if (old_focus_obj != obj)
833 g_object_weak_unref (G_OBJECT (old_focus_obj),
834 (GWeakNotify) gail_focus_object_destroyed,
838 * We call g_object_ref as if obj is destroyed
839 * while the weak reference exists then destroying the
840 * focus_obj would cause gail_focus_object_destroyed to be
841 * called when obj is not a valid GObject.
845 g_object_weak_ref (G_OBJECT (focus_obj),
846 (GWeakNotify) gail_focus_object_destroyed,
848 g_object_set_qdata (G_OBJECT (obj), quark_focus_object, focus_obj);
853 * These exported symbols are hooked by gnome-program
854 * to provide automatic module initialization and shutdown.
856 extern void gnome_accessibility_module_init (void);
857 extern void gnome_accessibility_module_shutdown (void);
859 static int gail_initialized = FALSE;
862 gail_accessibility_module_init (void)
864 const char *env_a_t_support;
865 gboolean a_t_support = FALSE;
867 if (gail_initialized)
871 gail_initialized = TRUE;
872 quark_focus_object = g_quark_from_static_string ("gail-focus-object");
874 env_a_t_support = g_getenv (GNOME_ACCESSIBILITY_ENV);
877 a_t_support = atoi (env_a_t_support);
879 fprintf (stderr, "GTK Accessibility Module initialized\n");
881 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_WIDGET, gail_widget);
882 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CONTAINER, gail_container);
883 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_BUTTON, gail_button);
884 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_LINK_BUTTON, gail_link_button);
885 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU_ITEM, gail_menu_item);
886 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TOGGLE_BUTTON, gail_toggle_button);
887 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_IMAGE, gail_image);
888 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TEXT_VIEW, gail_text_view);
889 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_COMBO_BOX, gail_combo_box);
890 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_ENTRY, gail_entry);
891 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU_BAR, gail_menu_shell);
892 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_MENU, gail_menu);
893 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_WINDOW, gail_window);
894 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RANGE, gail_range);
895 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCALE, gail_scale);
896 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCALE_BUTTON, gail_scale_button);
897 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_LABEL, gail_label);
898 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_STATUSBAR, gail_statusbar);
899 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_NOTEBOOK, gail_notebook);
900 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CALENDAR, gail_calendar);
901 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_PROGRESS_BAR, gail_progress_bar);
902 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SPIN_BUTTON, gail_spin_button);
903 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_TREE_VIEW, gail_tree_view);
904 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_FRAME, gail_frame);
905 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_TEXT, gail_text_cell);
906 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_TOGGLE, gail_boolean_cell);
907 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER_PIXBUF, gail_image_cell);
908 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CELL_RENDERER, gail_renderer_cell);
909 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RADIO_BUTTON, gail_radio_button);
910 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_ARROW, gail_arrow);
911 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SEPARATOR, gail_separator);
912 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_BOX, gail_box);
913 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCROLLED_WINDOW, gail_scrolled_window);
914 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_PANED, gail_paned);
915 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_SCROLLBAR, gail_scrollbar);
916 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_CHECK_MENU_ITEM, gail_check_menu_item);
917 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_RADIO_MENU_ITEM, gail_radio_menu_item);
918 GAIL_WIDGET_SET_FACTORY (GTK_TYPE_EXPANDER, gail_expander);
920 atk_focus_tracker_init (gail_focus_tracker_init);
921 focus_tracker_id = atk_add_focus_tracker (gail_focus_tracker);
923 /* Initialize the GailUtility class */
924 g_type_class_unref (g_type_class_ref (GAIL_TYPE_UTIL));
925 g_type_class_unref (g_type_class_ref (GAIL_TYPE_MISC));
929 * gnome_accessibility_module_init:
932 * This method is invoked by name from libgnome's
933 * gnome-program.c to activate accessibility support.
936 gnome_accessibility_module_init (void)
938 gail_accessibility_module_init ();
942 * gnome_accessibility_module_shutdown:
945 * This method is invoked by name from libgnome's
946 * gnome-program.c to de-activate accessibility support.
949 gnome_accessibility_module_shutdown (void)
951 if (!gail_initialized)
955 gail_initialized = FALSE;
956 atk_remove_focus_tracker (focus_tracker_id);
958 fprintf (stderr, "GTK Accessibility Module shutdown\n");
960 /* FIXME: de-register the factory types so we can unload ? */
964 gtk_module_init (gint *argc, char** argv[])
966 const char* env_no_gail;
967 gboolean no_gail = FALSE;
969 env_no_gail = g_getenv (NO_GAIL_ENV);
971 no_gail = atoi (env_no_gail);
976 gail_accessibility_module_init ();
982 g_module_check_init (GModule *module)
984 g_module_make_resident (module);