1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
28 #include <string.h> /* memset */
29 #include "gdk/gdkkeysyms.h"
30 #include "gtkaccelmap.h"
31 #include "gtkbindings.h"
35 #include "gtkmenuitem.h"
36 #include "gtksignal.h"
37 #include "gtkwindow.h"
39 #include "gtkvscrollbar.h"
40 #include "gtksettings.h"
44 #define MENU_ITEM_CLASS(w) GTK_MENU_ITEM_GET_CLASS (w)
45 #define MENU_NEEDS_RESIZE(m) GTK_MENU_SHELL (m)->menu_flag
47 #define SUBMENU_NAV_REGION_PADDING 2
48 #define SUBMENU_NAV_HYSTERESIS_TIMEOUT 333
50 #define MENU_SCROLL_STEP 10
51 #define MENU_SCROLL_ARROW_HEIGHT 16
52 #define MENU_SCROLL_FAST_ZONE 4
53 #define MENU_SCROLL_TIMEOUT1 150
54 #define MENU_SCROLL_TIMEOUT2 50
56 typedef struct _GtkMenuAttachData GtkMenuAttachData;
58 struct _GtkMenuAttachData
60 GtkWidget *attach_widget;
61 GtkMenuDetachFunc detacher;
69 static void gtk_menu_class_init (GtkMenuClass *klass);
70 static void gtk_menu_init (GtkMenu *menu);
71 static void gtk_menu_set_property (GObject *object,
75 static void gtk_menu_get_property (GObject *object,
79 static void gtk_menu_destroy (GtkObject *object);
80 static void gtk_menu_finalize (GObject *object);
81 static void gtk_menu_realize (GtkWidget *widget);
82 static void gtk_menu_unrealize (GtkWidget *widget);
83 static void gtk_menu_size_request (GtkWidget *widget,
84 GtkRequisition *requisition);
85 static void gtk_menu_size_allocate (GtkWidget *widget,
86 GtkAllocation *allocation);
87 static void gtk_menu_paint (GtkWidget *widget,
88 GdkEventExpose *expose);
89 static void gtk_menu_show (GtkWidget *widget);
90 static gboolean gtk_menu_expose (GtkWidget *widget,
91 GdkEventExpose *event);
92 static gboolean gtk_menu_key_press (GtkWidget *widget,
94 static gboolean gtk_menu_motion_notify (GtkWidget *widget,
95 GdkEventMotion *event);
96 static gboolean gtk_menu_enter_notify (GtkWidget *widget,
97 GdkEventCrossing *event);
98 static gboolean gtk_menu_leave_notify (GtkWidget *widget,
99 GdkEventCrossing *event);
100 static void gtk_menu_scroll_to (GtkMenu *menu,
102 static void gtk_menu_stop_scrolling (GtkMenu *menu);
103 static gboolean gtk_menu_scroll_timeout (gpointer data);
104 static void gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell,
105 GtkWidget *menu_item);
106 static void gtk_menu_select_item (GtkMenuShell *menu_shell,
107 GtkWidget *menu_item);
108 static void gtk_menu_real_insert (GtkMenuShell *menu_shell,
111 static void gtk_menu_scrollbar_changed (GtkAdjustment *adjustment,
113 static void gtk_menu_handle_scrolling (GtkMenu *menu,
115 static void gtk_menu_set_tearoff_hints (GtkMenu *menu,
118 static void gtk_menu_stop_navigating_submenu (GtkMenu *menu);
119 static gboolean gtk_menu_stop_navigating_submenu_cb (gpointer user_data);
120 static gboolean gtk_menu_navigating_submenu (GtkMenu *menu,
123 static void gtk_menu_set_submenu_navigation_region (GtkMenu *menu,
124 GtkMenuItem *menu_item,
125 GdkEventCrossing *event);
127 static void gtk_menu_deactivate (GtkMenuShell *menu_shell);
128 static void gtk_menu_show_all (GtkWidget *widget);
129 static void gtk_menu_hide_all (GtkWidget *widget);
130 static void gtk_menu_position (GtkMenu *menu);
131 static void gtk_menu_reparent (GtkMenu *menu,
132 GtkWidget *new_parent,
134 static void gtk_menu_remove (GtkContainer *menu,
137 static void gtk_menu_update_title (GtkMenu *menu);
139 static void menu_grab_transfer_window_destroy (GtkMenu *menu);
140 static GdkWindow *menu_grab_transfer_window_get (GtkMenu *menu);
142 static void _gtk_menu_refresh_accel_paths (GtkMenu *menu,
143 gboolean group_changed);
145 static GtkMenuShellClass *parent_class = NULL;
146 static const gchar *attach_data_key = "gtk-menu-attach-data";
149 gtk_menu_get_type (void)
151 static GtkType menu_type = 0;
155 static const GtkTypeInfo menu_info =
159 sizeof (GtkMenuClass),
160 (GtkClassInitFunc) gtk_menu_class_init,
161 (GtkObjectInitFunc) gtk_menu_init,
162 /* reserved_1 */ NULL,
163 /* reserved_2 */ NULL,
164 (GtkClassInitFunc) NULL,
167 menu_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_info);
174 gtk_menu_class_init (GtkMenuClass *class)
176 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
177 GtkObjectClass *object_class = GTK_OBJECT_CLASS (class);
178 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
179 GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
180 GtkMenuShellClass *menu_shell_class = GTK_MENU_SHELL_CLASS (class);
181 GtkBindingSet *binding_set;
183 parent_class = g_type_class_peek_parent (class);
185 gobject_class->finalize = gtk_menu_finalize;
186 gobject_class->set_property = gtk_menu_set_property;
187 gobject_class->get_property = gtk_menu_get_property;
189 g_object_class_install_property (gobject_class,
191 g_param_spec_string ("tearoff-title",
193 _("A title that may be displayed by the window manager when this menu is torn-off."),
195 G_PARAM_READABLE | G_PARAM_WRITABLE));
196 object_class->destroy = gtk_menu_destroy;
198 widget_class->realize = gtk_menu_realize;
199 widget_class->unrealize = gtk_menu_unrealize;
200 widget_class->size_request = gtk_menu_size_request;
201 widget_class->size_allocate = gtk_menu_size_allocate;
202 widget_class->show = gtk_menu_show;
203 widget_class->expose_event = gtk_menu_expose;
204 widget_class->key_press_event = gtk_menu_key_press;
205 widget_class->motion_notify_event = gtk_menu_motion_notify;
206 widget_class->show_all = gtk_menu_show_all;
207 widget_class->hide_all = gtk_menu_hide_all;
208 widget_class->enter_notify_event = gtk_menu_enter_notify;
209 widget_class->leave_notify_event = gtk_menu_leave_notify;
211 container_class->remove = gtk_menu_remove;
213 menu_shell_class->submenu_placement = GTK_LEFT_RIGHT;
214 menu_shell_class->deactivate = gtk_menu_deactivate;
215 menu_shell_class->select_item = gtk_menu_select_item;
216 menu_shell_class->insert = gtk_menu_real_insert;
218 binding_set = gtk_binding_set_by_class (class);
219 gtk_binding_entry_add_signal (binding_set,
222 GTK_TYPE_MENU_DIRECTION_TYPE,
224 gtk_binding_entry_add_signal (binding_set,
227 GTK_TYPE_MENU_DIRECTION_TYPE,
229 gtk_binding_entry_add_signal (binding_set,
232 GTK_TYPE_MENU_DIRECTION_TYPE,
234 gtk_binding_entry_add_signal (binding_set,
237 GTK_TYPE_MENU_DIRECTION_TYPE,
239 gtk_binding_entry_add_signal (binding_set,
242 GTK_TYPE_MENU_DIRECTION_TYPE,
243 GTK_MENU_DIR_PARENT);
244 gtk_binding_entry_add_signal (binding_set,
247 GTK_TYPE_MENU_DIRECTION_TYPE,
248 GTK_MENU_DIR_PARENT);
249 gtk_binding_entry_add_signal (binding_set,
252 GTK_TYPE_MENU_DIRECTION_TYPE,
254 gtk_binding_entry_add_signal (binding_set,
257 GTK_TYPE_MENU_DIRECTION_TYPE,
260 gtk_settings_install_property (g_param_spec_boolean ("gtk-can-change-accels",
261 _("Can change accelerators"),
262 _("Whether menu accelerators can be changed by pressing a key over the menu item."),
269 gtk_menu_set_property (GObject *object,
276 menu = GTK_MENU (object);
280 case PROP_TEAROFF_TITLE:
281 gtk_menu_set_title (menu, g_value_get_string (value));
284 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
290 gtk_menu_get_property (GObject *object,
297 menu = GTK_MENU (object);
301 case PROP_TEAROFF_TITLE:
302 g_value_set_string (value, gtk_menu_get_title (menu));
305 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
311 gtk_menu_window_event (GtkWidget *window,
315 gboolean handled = FALSE;
317 gtk_widget_ref (window);
318 gtk_widget_ref (menu);
323 case GDK_KEY_RELEASE:
324 handled = gtk_widget_event (menu, event);
330 gtk_widget_unref (window);
331 gtk_widget_unref (menu);
337 gtk_menu_init (GtkMenu *menu)
339 menu->parent_menu_item = NULL;
340 menu->old_active_menu_item = NULL;
341 menu->accel_group = NULL;
342 menu->position_func = NULL;
343 menu->position_func_data = NULL;
344 menu->toggle_size = 0;
346 menu->toplevel = g_object_connect (gtk_widget_new (GTK_TYPE_WINDOW,
347 "type", GTK_WINDOW_POPUP,
350 "signal::event", gtk_menu_window_event, menu,
351 "signal::destroy", gtk_widget_destroyed, &menu->toplevel,
353 gtk_window_set_policy (GTK_WINDOW (menu->toplevel),
355 gtk_window_set_mnemonic_modifier (GTK_WINDOW (menu->toplevel), 0);
357 /* Refloat the menu, so that reference counting for the menu isn't
358 * affected by it being a child of the toplevel
360 GTK_WIDGET_SET_FLAGS (menu, GTK_FLOATING);
361 menu->needs_destruction_ref_count = TRUE;
363 menu->view_window = NULL;
364 menu->bin_window = NULL;
366 menu->scroll_offset = 0;
367 menu->scroll_step = 0;
368 menu->timeout_id = 0;
369 menu->scroll_fast = FALSE;
371 menu->tearoff_window = NULL;
372 menu->tearoff_hbox = NULL;
373 menu->torn_off = FALSE;
374 menu->tearoff_active = FALSE;
375 menu->tearoff_adjustment = NULL;
376 menu->tearoff_scrollbar = NULL;
378 menu->upper_arrow_visible = FALSE;
379 menu->lower_arrow_visible = FALSE;
380 menu->upper_arrow_prelight = FALSE;
381 menu->lower_arrow_prelight = FALSE;
383 MENU_NEEDS_RESIZE (menu) = TRUE;
387 gtk_menu_destroy (GtkObject *object)
390 GtkMenuAttachData *data;
392 g_return_if_fail (GTK_IS_MENU (object));
394 menu = GTK_MENU (object);
396 gtk_menu_stop_scrolling (menu);
398 data = gtk_object_get_data (object, attach_data_key);
400 gtk_menu_detach (menu);
402 gtk_menu_stop_navigating_submenu (menu);
404 if (menu->old_active_menu_item)
406 gtk_widget_unref (menu->old_active_menu_item);
407 menu->old_active_menu_item = NULL;
410 /* Add back the reference count for being a child */
411 if (menu->needs_destruction_ref_count)
413 menu->needs_destruction_ref_count = FALSE;
414 gtk_object_ref (object);
417 if (menu->accel_group)
419 g_object_unref (menu->accel_group);
420 menu->accel_group = NULL;
424 gtk_widget_destroy (menu->toplevel);
425 if (menu->tearoff_window)
426 gtk_widget_destroy (menu->tearoff_window);
428 GTK_OBJECT_CLASS (parent_class)->destroy (object);
432 gtk_menu_finalize (GObject *object)
434 GtkMenu *menu = GTK_MENU (object);
436 g_free (menu->accel_path);
438 G_OBJECT_CLASS (parent_class)->finalize (object);
442 gtk_menu_attach_to_widget (GtkMenu *menu,
443 GtkWidget *attach_widget,
444 GtkMenuDetachFunc detacher)
446 GtkMenuAttachData *data;
448 g_return_if_fail (GTK_IS_MENU (menu));
449 g_return_if_fail (GTK_IS_WIDGET (attach_widget));
450 g_return_if_fail (detacher != NULL);
452 /* keep this function in sync with gtk_widget_set_parent()
455 data = gtk_object_get_data (GTK_OBJECT (menu), attach_data_key);
458 g_warning ("gtk_menu_attach_to_widget(): menu already attached to %s",
459 gtk_type_name (GTK_OBJECT_TYPE (data->attach_widget)));
463 gtk_object_ref (GTK_OBJECT (menu));
464 gtk_object_sink (GTK_OBJECT (menu));
466 data = g_new (GtkMenuAttachData, 1);
467 data->attach_widget = attach_widget;
468 data->detacher = detacher;
469 gtk_object_set_data (GTK_OBJECT (menu), attach_data_key, data);
471 if (GTK_WIDGET_STATE (menu) != GTK_STATE_NORMAL)
472 gtk_widget_set_state (GTK_WIDGET (menu), GTK_STATE_NORMAL);
474 /* we don't need to set the style here, since
475 * we are a toplevel widget.
478 /* Fallback title for menu comes from attach widget */
479 gtk_menu_update_title (menu);
483 gtk_menu_get_attach_widget (GtkMenu *menu)
485 GtkMenuAttachData *data;
487 g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
489 data = gtk_object_get_data (GTK_OBJECT (menu), attach_data_key);
491 return data->attach_widget;
496 gtk_menu_detach (GtkMenu *menu)
498 GtkMenuAttachData *data;
500 g_return_if_fail (GTK_IS_MENU (menu));
502 /* keep this function in sync with gtk_widget_unparent()
504 data = gtk_object_get_data (GTK_OBJECT (menu), attach_data_key);
507 g_warning ("gtk_menu_detach(): menu is not attached");
510 gtk_object_remove_data (GTK_OBJECT (menu), attach_data_key);
512 data->detacher (data->attach_widget, menu);
514 if (GTK_WIDGET_REALIZED (menu))
515 gtk_widget_unrealize (GTK_WIDGET (menu));
519 /* Fallback title for menu comes from attach widget */
520 gtk_menu_update_title (menu);
522 gtk_widget_unref (GTK_WIDGET (menu));
526 gtk_menu_remove (GtkContainer *container,
530 g_return_if_fail (GTK_IS_MENU (container));
531 g_return_if_fail (GTK_IS_MENU_ITEM (widget));
533 menu = GTK_MENU (container);
535 /* Clear out old_active_menu_item if it matches the item we are removing
537 if (menu->old_active_menu_item == widget)
539 gtk_widget_unref (menu->old_active_menu_item);
540 menu->old_active_menu_item = NULL;
543 GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
550 return GTK_WIDGET (gtk_type_new (gtk_menu_get_type ()));
554 gtk_menu_real_insert (GtkMenuShell *menu_shell,
558 if (GTK_WIDGET_REALIZED (menu_shell))
559 gtk_widget_set_parent_window (child, GTK_MENU (menu_shell)->bin_window);
561 GTK_MENU_SHELL_CLASS (parent_class)->insert (menu_shell, child, position);
565 gtk_menu_tearoff_bg_copy (GtkMenu *menu)
570 widget = GTK_WIDGET (menu);
576 GdkGCValues gc_values;
578 menu->tearoff_active = FALSE;
579 menu->saved_scroll_offset = menu->scroll_offset;
581 gc_values.subwindow_mode = GDK_INCLUDE_INFERIORS;
582 gc = gdk_gc_new_with_values (widget->window,
583 &gc_values, GDK_GC_SUBWINDOW);
585 gdk_window_get_size (menu->tearoff_window->window, &width, &height);
587 pixmap = gdk_pixmap_new (menu->tearoff_window->window,
592 gdk_draw_pixmap (pixmap, gc,
593 menu->tearoff_window->window,
597 gtk_widget_set_usize (menu->tearoff_window,
601 gdk_window_set_back_pixmap (menu->tearoff_window->window, pixmap, FALSE);
602 gdk_pixmap_unref (pixmap);
607 popup_grab_on_window (GdkWindow *window,
608 guint32 activate_time)
610 if ((gdk_pointer_grab (window, TRUE,
611 GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
612 GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
613 GDK_POINTER_MOTION_MASK,
614 NULL, NULL, activate_time) == 0))
616 if (gdk_keyboard_grab (window, TRUE,
621 gdk_pointer_ungrab (activate_time);
630 gtk_menu_popup (GtkMenu *menu,
631 GtkWidget *parent_menu_shell,
632 GtkWidget *parent_menu_item,
633 GtkMenuPositionFunc func,
636 guint32 activate_time)
639 GtkWidget *xgrab_shell;
641 GdkEvent *current_event;
642 GtkMenuShell *menu_shell;
644 g_return_if_fail (GTK_IS_MENU (menu));
646 widget = GTK_WIDGET (menu);
647 menu_shell = GTK_MENU_SHELL (menu);
649 menu_shell->parent_menu_shell = parent_menu_shell;
651 /* Find the last viewable ancestor, and make an X grab on it
653 parent = GTK_WIDGET (menu);
657 gboolean viewable = TRUE;
658 GtkWidget *tmp = parent;
662 if (!GTK_WIDGET_MAPPED (tmp))
671 xgrab_shell = parent;
673 parent = GTK_MENU_SHELL (parent)->parent_menu_shell;
676 /* We want to receive events generated when we map the menu; unfortunately,
677 * since there is probably already an implicit grab in place from the
678 * button that the user used to pop up the menu, we won't receive then --
679 * in particular, the EnterNotify when the menu pops up under the pointer.
681 * If we are grabbing on a parent menu shell, no problem; just grab on
682 * that menu shell first before popping up the window with owner_events = TRUE.
684 * When grabbing on the menu itself, things get more convuluted - we
685 * we do an explicit grab on a specially created window with
686 * owner_events = TRUE, which we override further down with a grab
687 * on the menu. (We can't grab on the menu until it is mapped; we
688 * probably could just leave the grab on the other window, with a
689 * little reorganization of the code in gtkmenu*).
691 if (xgrab_shell && xgrab_shell != widget)
693 if (popup_grab_on_window (xgrab_shell->window, activate_time))
694 GTK_MENU_SHELL (xgrab_shell)->have_xgrab = TRUE;
698 GdkWindow *transfer_window;
700 xgrab_shell = widget;
701 transfer_window = menu_grab_transfer_window_get (menu);
702 if (popup_grab_on_window (transfer_window, activate_time))
703 GTK_MENU_SHELL (xgrab_shell)->have_xgrab = TRUE;
706 if (!GTK_MENU_SHELL (xgrab_shell)->have_xgrab)
708 /* We failed to make our pointer/keyboard grab. Rather than leaving the user
709 * with a stuck up window, we just abort here. Presumably the user will
712 menu_shell->parent_menu_shell = NULL;
716 menu_shell->active = TRUE;
717 menu_shell->button = button;
719 /* If we are popping up the menu from something other than, a button
720 * press then, as a heuristic, we ignore enter events for the menu
721 * until we get a MOTION_NOTIFY.
724 current_event = gtk_get_current_event ();
727 if ((current_event->type != GDK_BUTTON_PRESS) &&
728 (current_event->type != GDK_ENTER_NOTIFY))
729 menu_shell->ignore_enter = TRUE;
731 gdk_event_free (current_event);
736 gtk_menu_tearoff_bg_copy (menu);
738 gtk_menu_reparent (menu, menu->toplevel, FALSE);
741 menu->parent_menu_item = parent_menu_item;
742 menu->position_func = func;
743 menu->position_func_data = data;
744 menu_shell->activate_time = activate_time;
746 gtk_menu_position (menu);
748 /* We need to show the menu _here_ because code expects to be
749 * able to tell if the menu is onscreen by looking at the
750 * GTK_WIDGET_VISIBLE (menu)
752 gtk_widget_show (GTK_WIDGET (menu));
753 gtk_widget_show (menu->toplevel);
755 gtk_menu_scroll_to (menu, menu->scroll_offset);
757 if (xgrab_shell == widget)
758 popup_grab_on_window (widget->window, activate_time); /* Should always succeed */
760 gtk_grab_add (GTK_WIDGET (menu));
764 gtk_menu_popdown (GtkMenu *menu)
766 GtkMenuShell *menu_shell;
768 g_return_if_fail (GTK_IS_MENU (menu));
770 menu_shell = GTK_MENU_SHELL (menu);
772 menu_shell->parent_menu_shell = NULL;
773 menu_shell->active = FALSE;
774 menu_shell->ignore_enter = FALSE;
776 gtk_menu_stop_scrolling (menu);
778 gtk_menu_stop_navigating_submenu (menu);
780 if (menu_shell->active_menu_item)
782 if (menu->old_active_menu_item)
783 gtk_widget_unref (menu->old_active_menu_item);
784 menu->old_active_menu_item = menu_shell->active_menu_item;
785 gtk_widget_ref (menu->old_active_menu_item);
788 gtk_menu_shell_deselect (menu_shell);
790 /* The X Grab, if present, will automatically be removed when we hide
792 gtk_widget_hide (menu->toplevel);
797 gdk_window_get_size (menu->tearoff_window->window, &width, &height);
798 gtk_widget_set_usize (menu->tearoff_window,
802 if (GTK_BIN (menu->toplevel)->child)
804 gtk_menu_reparent (menu, menu->tearoff_hbox, TRUE);
808 /* We popped up the menu from the tearoff, so we need to
809 * release the grab - we aren't actually hiding the menu.
811 if (menu_shell->have_xgrab)
813 gdk_pointer_ungrab (GDK_CURRENT_TIME);
814 gdk_keyboard_ungrab (GDK_CURRENT_TIME);
818 /* gtk_menu_popdown is called each time a menu item is selected from
819 * a torn off menu. Only scroll back to the saved position if the
820 * non-tearoff menu was popped down.
822 if (!menu->tearoff_active)
823 gtk_menu_scroll_to (menu, menu->saved_scroll_offset);
824 menu->tearoff_active = TRUE;
827 gtk_widget_hide (GTK_WIDGET (menu));
829 menu_shell->have_xgrab = FALSE;
830 gtk_grab_remove (GTK_WIDGET (menu));
832 menu_grab_transfer_window_destroy (menu);
836 gtk_menu_get_active (GtkMenu *menu)
841 g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
843 if (!menu->old_active_menu_item)
846 children = GTK_MENU_SHELL (menu)->children;
850 child = children->data;
851 children = children->next;
853 if (GTK_BIN (child)->child)
858 menu->old_active_menu_item = child;
859 if (menu->old_active_menu_item)
860 gtk_widget_ref (menu->old_active_menu_item);
863 return menu->old_active_menu_item;
867 gtk_menu_set_active (GtkMenu *menu,
873 g_return_if_fail (GTK_IS_MENU (menu));
875 tmp_list = g_list_nth (GTK_MENU_SHELL (menu)->children, index);
878 child = tmp_list->data;
879 if (GTK_BIN (child)->child)
881 if (menu->old_active_menu_item)
882 gtk_widget_unref (menu->old_active_menu_item);
883 menu->old_active_menu_item = child;
884 gtk_widget_ref (menu->old_active_menu_item);
890 gtk_menu_set_accel_group (GtkMenu *menu,
891 GtkAccelGroup *accel_group)
893 g_return_if_fail (GTK_IS_MENU (menu));
895 if (menu->accel_group != accel_group)
897 if (menu->accel_group)
898 gtk_accel_group_unref (menu->accel_group);
899 menu->accel_group = accel_group;
900 if (menu->accel_group)
901 gtk_accel_group_ref (menu->accel_group);
902 _gtk_menu_refresh_accel_paths (menu, TRUE);
907 gtk_menu_get_accel_group (GtkMenu *menu)
909 g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
911 return menu->accel_group;
915 * gtk_menu_set_accel_path
916 * @menu: a valid #GtkMenu
917 * @accel_path: a valid accelerator path
919 * Sets an accelerator path for this menu from which accelerator paths
920 * for its immediate children, its menu items, can be constructed.
921 * The main purpose of this function is to spare the programmer the
922 * inconvenience of having to call gtk_menu_item_set_accel_path() on
923 * each menu item that should support runtime user changable accelerators.
924 * Instead, by just calling gtk_menu_set_accel_path() on their parent,
925 * each menu item of this menu, that contains a label describing its purpose,
926 * automatically gets an accel path assigned. For example, a menu containing
927 * menu items "New" and "Exit", will, after
928 * <literal>gtk_menu_set_accel_path (menu, "<Gnumeric-Sheet>/File");</literal>
929 * has been called, assign its items the accel paths:
930 * <literal>"<Gnumeric-Sheet>/File/New"</literal> and <literal>"<Gnumeric-Sheet>/File/Exit"</literal>.
931 * Assigning accel paths to menu items then enables the user to change
932 * their accelerators at runtime. More details about accelerator paths
933 * and their default setups can be found at gtk_accel_map_add_entry().
936 gtk_menu_set_accel_path (GtkMenu *menu,
937 const gchar *accel_path)
939 g_return_if_fail (GTK_IS_MENU (menu));
941 g_return_if_fail (accel_path[0] == '<' && strchr (accel_path, '/')); /* simplistic check */
943 g_free (menu->accel_path);
944 menu->accel_path = g_strdup (accel_path);
945 if (menu->accel_path)
946 _gtk_menu_refresh_accel_paths (menu, FALSE);
951 gboolean group_changed;
955 refresh_accel_paths_foreach (GtkWidget *widget,
958 AccelPropagation *prop = data;
960 if (GTK_IS_MENU_ITEM (widget)) /* should always be true */
961 _gtk_menu_item_refresh_accel_path (GTK_MENU_ITEM (widget),
962 prop->menu->accel_path,
963 prop->menu->accel_group,
964 prop->group_changed);
968 _gtk_menu_refresh_accel_paths (GtkMenu *menu,
969 gboolean group_changed)
971 g_return_if_fail (GTK_IS_MENU (menu));
973 if (menu->accel_path && menu->accel_group)
975 AccelPropagation prop;
978 prop.group_changed = group_changed;
979 gtk_container_foreach (GTK_CONTAINER (menu),
980 refresh_accel_paths_foreach,
986 gtk_menu_reposition (GtkMenu *menu)
988 g_return_if_fail (GTK_IS_MENU (menu));
990 if (GTK_WIDGET_DRAWABLE (menu) && !menu->torn_off)
991 gtk_menu_position (menu);
995 gtk_menu_scrollbar_changed (GtkAdjustment *adjustment,
998 g_return_if_fail (GTK_IS_MENU (menu));
1000 if (adjustment->value != menu->scroll_offset)
1001 gtk_menu_scroll_to (menu, adjustment->value);
1005 gtk_menu_set_tearoff_hints (GtkMenu *menu,
1008 GdkGeometry geometry_hints;
1010 if (!menu->tearoff_window)
1013 if (GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar))
1015 gtk_widget_size_request (menu->tearoff_scrollbar, NULL);
1016 width += menu->tearoff_scrollbar->requisition.width;
1019 geometry_hints.min_width = width;
1020 geometry_hints.max_width = width;
1022 geometry_hints.min_height = 0;
1023 geometry_hints.max_height = GTK_WIDGET (menu)->requisition.height;
1024 gtk_window_set_geometry_hints (GTK_WINDOW (menu->tearoff_window),
1027 GDK_HINT_MAX_SIZE|GDK_HINT_MIN_SIZE);
1031 gtk_menu_update_title (GtkMenu *menu)
1033 if (menu->tearoff_window)
1036 GtkWidget *attach_widget;
1038 title = gtk_menu_get_title (menu);
1041 attach_widget = gtk_menu_get_attach_widget (menu);
1042 if (GTK_IS_MENU_ITEM (attach_widget))
1044 GtkWidget *child = GTK_BIN (attach_widget)->child;
1045 if (GTK_IS_LABEL (child))
1046 title = gtk_label_get_text (GTK_LABEL (child));
1051 gtk_window_set_title (GTK_WINDOW (menu->tearoff_window), title);
1056 gtk_menu_set_tearoff_state (GtkMenu *menu,
1061 g_return_if_fail (GTK_IS_MENU (menu));
1063 if (menu->torn_off != torn_off)
1065 menu->torn_off = torn_off;
1066 menu->tearoff_active = torn_off;
1070 if (GTK_WIDGET_VISIBLE (menu))
1071 gtk_menu_popdown (menu);
1073 if (!menu->tearoff_window)
1075 menu->tearoff_window = g_object_connect (gtk_widget_new (GTK_TYPE_WINDOW,
1076 "type", GTK_WINDOW_TOPLEVEL,
1078 "signal::destroy", gtk_widget_destroyed, &menu->tearoff_window,
1080 gtk_window_set_type_hint (GTK_WINDOW (menu->tearoff_window),
1081 GDK_WINDOW_TYPE_HINT_MENU);
1082 gtk_window_set_mnemonic_modifier (GTK_WINDOW (menu->tearoff_window), 0);
1083 gtk_widget_set_app_paintable (menu->tearoff_window, TRUE);
1084 gtk_signal_connect (GTK_OBJECT (menu->tearoff_window),
1086 GTK_SIGNAL_FUNC (gtk_menu_window_event),
1089 gtk_menu_update_title (menu);
1091 gtk_widget_realize (menu->tearoff_window);
1093 gdk_window_set_decorations (menu->tearoff_window->window,
1096 GDK_DECOR_MINIMIZE |
1097 GDK_DECOR_MAXIMIZE);
1098 gtk_window_set_resizable (GTK_WINDOW (menu->tearoff_window), FALSE);
1100 menu->tearoff_hbox = gtk_hbox_new (FALSE, FALSE);
1101 gtk_container_add (GTK_CONTAINER (menu->tearoff_window), menu->tearoff_hbox);
1103 gdk_window_get_size (GTK_WIDGET (menu)->window, &width, &height);
1104 menu->tearoff_adjustment =
1105 GTK_ADJUSTMENT (gtk_adjustment_new (0,
1107 GTK_WIDGET (menu)->requisition.height,
1111 g_object_connect (GTK_OBJECT (menu->tearoff_adjustment),
1112 "signal::value_changed", gtk_menu_scrollbar_changed, menu,
1114 menu->tearoff_scrollbar = gtk_vscrollbar_new (menu->tearoff_adjustment);
1116 gtk_box_pack_end (GTK_BOX (menu->tearoff_hbox),
1117 menu->tearoff_scrollbar,
1120 if (menu->tearoff_adjustment->upper > height)
1121 gtk_widget_show (menu->tearoff_scrollbar);
1123 gtk_widget_show (menu->tearoff_hbox);
1126 gtk_menu_reparent (menu, menu->tearoff_hbox, FALSE);
1128 gdk_window_get_size (GTK_WIDGET (menu)->window, &width, NULL);
1130 /* Update menu->requisition
1132 gtk_widget_size_request (GTK_WIDGET (menu), NULL);
1134 gtk_menu_set_tearoff_hints (menu, width);
1136 gtk_widget_realize (menu->tearoff_window);
1137 gtk_menu_position (menu);
1139 gtk_widget_show (GTK_WIDGET (menu));
1140 gtk_widget_show (menu->tearoff_window);
1142 gtk_menu_scroll_to (menu, 0);
1147 gtk_widget_hide (menu->tearoff_window);
1148 gtk_menu_reparent (menu, menu->toplevel, FALSE);
1154 * gtk_menu_get_tearoff_state:
1157 * Returns whether the menu is torn off. See
1158 * gtk_menu_set_tearoff_state ().
1160 * Return value: %TRUE if the menu is currently torn off.
1163 gtk_menu_get_tearoff_state (GtkMenu *menu)
1165 g_return_val_if_fail (GTK_IS_MENU (menu), FALSE);
1167 return menu->torn_off;
1171 * gtk_menu_set_title:
1173 * @title: a string containing the title for the menu.
1175 * Sets the title string for the menu. The title is displayed when the menu
1176 * is shown as a tearoff menu.
1179 gtk_menu_set_title (GtkMenu *menu,
1182 g_return_if_fail (GTK_IS_MENU (menu));
1185 g_object_set_data_full (G_OBJECT (menu), "gtk-menu-title",
1186 g_strdup (title), (GtkDestroyNotify) g_free);
1188 g_object_set_data (G_OBJECT (menu), "gtk-menu-title", NULL);
1190 gtk_menu_update_title (menu);
1191 g_object_notify (G_OBJECT (menu), "tearoff_title");
1195 * gtk_menu_get_title:
1198 * Returns the title of the menu. See gtk_menu_set_title().
1200 * Return value: the title of the menu, or %NULL if the menu has no
1203 G_CONST_RETURN gchar *
1204 gtk_menu_get_title (GtkMenu *menu)
1206 g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
1208 return gtk_object_get_data (GTK_OBJECT (menu), "gtk-menu-title");
1212 gtk_menu_reorder_child (GtkMenu *menu,
1216 GtkMenuShell *menu_shell;
1217 g_return_if_fail (GTK_IS_MENU (menu));
1218 g_return_if_fail (GTK_IS_MENU_ITEM (child));
1219 menu_shell = GTK_MENU_SHELL (menu);
1220 if (g_list_find (menu_shell->children, child))
1222 menu_shell->children = g_list_remove (menu_shell->children, child);
1223 menu_shell->children = g_list_insert (menu_shell->children, child, position);
1224 if (GTK_WIDGET_VISIBLE (menu_shell))
1225 gtk_widget_queue_resize (GTK_WIDGET (menu_shell));
1230 gtk_menu_realize (GtkWidget *widget)
1232 GdkWindowAttr attributes;
1233 gint attributes_mask;
1239 g_return_if_fail (GTK_IS_MENU (widget));
1241 menu = GTK_MENU (widget);
1243 GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1245 attributes.window_type = GDK_WINDOW_CHILD;
1246 attributes.x = widget->allocation.x;
1247 attributes.y = widget->allocation.y;
1248 attributes.width = widget->allocation.width;
1249 attributes.height = widget->allocation.height;
1250 attributes.wclass = GDK_INPUT_OUTPUT;
1251 attributes.visual = gtk_widget_get_visual (widget);
1252 attributes.colormap = gtk_widget_get_colormap (widget);
1254 attributes.event_mask = gtk_widget_get_events (widget);
1255 attributes.event_mask |= (GDK_EXPOSURE_MASK | GDK_KEY_PRESS_MASK |
1256 GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK );
1258 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
1259 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
1260 gdk_window_set_user_data (widget->window, widget);
1262 border_width = GTK_CONTAINER (widget)->border_width;
1264 attributes.x = border_width + widget->style->xthickness;
1265 attributes.y = border_width + widget->style->ythickness;
1266 attributes.width = MAX (1, widget->allocation.width - attributes.x * 2);
1267 attributes.height = MAX (1, widget->allocation.height - attributes.y * 2);
1269 if (menu->upper_arrow_visible)
1271 attributes.y += MENU_SCROLL_ARROW_HEIGHT;
1272 attributes.height -= MENU_SCROLL_ARROW_HEIGHT;
1274 if (menu->lower_arrow_visible)
1275 attributes.height -= MENU_SCROLL_ARROW_HEIGHT;
1277 menu->view_window = gdk_window_new (widget->window, &attributes, attributes_mask);
1278 gdk_window_set_user_data (menu->view_window, menu);
1282 attributes.height = MAX (1, widget->requisition.height - (border_width + widget->style->ythickness) * 2);
1284 menu->bin_window = gdk_window_new (menu->view_window, &attributes, attributes_mask);
1285 gdk_window_set_user_data (menu->bin_window, menu);
1287 children = GTK_MENU_SHELL (menu)->children;
1290 child = children->data;
1291 children = children->next;
1293 gtk_widget_set_parent_window (child, menu->bin_window);
1296 widget->style = gtk_style_attach (widget->style, widget->window);
1297 gtk_style_set_background (widget->style, menu->bin_window, GTK_STATE_NORMAL);
1298 gtk_style_set_background (widget->style, menu->view_window, GTK_STATE_NORMAL);
1299 gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
1301 gtk_menu_scroll_item_visible (GTK_MENU_SHELL (widget),
1302 GTK_MENU_SHELL (widget)->active_menu_item);
1304 gdk_window_show (menu->bin_window);
1305 gdk_window_show (menu->view_window);
1308 /* See notes in gtk_menu_popup() for information about the "grab transfer window"
1311 menu_grab_transfer_window_get (GtkMenu *menu)
1313 GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window");
1316 GdkWindowAttr attributes;
1317 gint attributes_mask;
1319 attributes.x = -100;
1320 attributes.y = -100;
1321 attributes.width = 10;
1322 attributes.height = 10;
1323 attributes.window_type = GDK_WINDOW_TEMP;
1324 attributes.wclass = GDK_INPUT_ONLY;
1325 attributes.override_redirect = TRUE;
1326 attributes.event_mask = 0;
1328 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
1330 window = gdk_window_new (NULL, &attributes, attributes_mask);
1331 gdk_window_set_user_data (window, menu);
1333 gdk_window_show (window);
1335 g_object_set_data (G_OBJECT (menu), "gtk-menu-transfer-window", window);
1342 menu_grab_transfer_window_destroy (GtkMenu *menu)
1344 GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window");
1347 gdk_window_set_user_data (window, NULL);
1348 gdk_window_destroy (window);
1349 g_object_set_data (G_OBJECT (menu), "gtk-menu-transfer-window", NULL);
1354 gtk_menu_unrealize (GtkWidget *widget)
1358 g_return_if_fail (GTK_IS_MENU (widget));
1360 menu = GTK_MENU (widget);
1362 menu_grab_transfer_window_destroy (menu);
1364 gdk_window_set_user_data (menu->view_window, NULL);
1365 gdk_window_destroy (menu->view_window);
1366 menu->view_window = NULL;
1368 gdk_window_set_user_data (menu->bin_window, NULL);
1369 gdk_window_destroy (menu->bin_window);
1370 menu->bin_window = NULL;
1372 (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
1376 gtk_menu_size_request (GtkWidget *widget,
1377 GtkRequisition *requisition)
1380 GtkMenuShell *menu_shell;
1383 guint max_toggle_size;
1384 guint max_accel_width;
1385 GtkRequisition child_requisition;
1387 g_return_if_fail (GTK_IS_MENU (widget));
1388 g_return_if_fail (requisition != NULL);
1390 menu = GTK_MENU (widget);
1391 menu_shell = GTK_MENU_SHELL (widget);
1393 requisition->width = 0;
1394 requisition->height = 0;
1396 max_toggle_size = 0;
1397 max_accel_width = 0;
1399 children = menu_shell->children;
1402 child = children->data;
1403 children = children->next;
1405 if (GTK_WIDGET_VISIBLE (child))
1409 /* It's important to size_request the child
1410 * before doing the toggle size request, in
1411 * case the toggle size request depends on the size
1412 * request of a child of the child (e.g. for ImageMenuItem)
1415 GTK_MENU_ITEM (child)->show_submenu_indicator = TRUE;
1416 gtk_widget_size_request (child, &child_requisition);
1418 requisition->width = MAX (requisition->width, child_requisition.width);
1419 requisition->height += child_requisition.height;
1421 gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child), &toggle_size);
1422 max_toggle_size = MAX (max_toggle_size, toggle_size);
1423 max_accel_width = MAX (max_accel_width, GTK_MENU_ITEM (child)->accelerator_width);
1427 requisition->width += max_toggle_size + max_accel_width;
1428 requisition->width += (GTK_CONTAINER (menu)->border_width +
1429 widget->style->xthickness) * 2;
1430 requisition->height += (GTK_CONTAINER (menu)->border_width +
1431 widget->style->ythickness) * 2;
1433 menu->toggle_size = max_toggle_size;
1435 /* If the requested width was different than the allocated width, we need to change
1436 * the geometry hints for the tear off window so that the window can actually be resized.
1437 * Don't resize the tearoff if it is not active, because it won't redraw (it is only a background pixmap).
1439 if ((requisition->width != GTK_WIDGET (menu)->allocation.width) && menu->tearoff_active)
1440 gtk_menu_set_tearoff_hints (menu, requisition->width);
1444 gtk_menu_size_allocate (GtkWidget *widget,
1445 GtkAllocation *allocation)
1448 GtkMenuShell *menu_shell;
1450 GtkAllocation child_allocation;
1455 g_return_if_fail (GTK_IS_MENU (widget));
1456 g_return_if_fail (allocation != NULL);
1458 menu = GTK_MENU (widget);
1459 menu_shell = GTK_MENU_SHELL (widget);
1461 widget->allocation = *allocation;
1463 x = GTK_CONTAINER (menu)->border_width + widget->style->xthickness;
1464 y = GTK_CONTAINER (menu)->border_width + widget->style->ythickness;
1466 width = MAX (1, allocation->width - x * 2);
1467 height = MAX (1, allocation->height - y * 2);
1469 if (menu->upper_arrow_visible && !menu->tearoff_active)
1471 y += MENU_SCROLL_ARROW_HEIGHT;
1472 height -= MENU_SCROLL_ARROW_HEIGHT;
1475 if (menu->lower_arrow_visible && !menu->tearoff_active)
1476 height -= MENU_SCROLL_ARROW_HEIGHT;
1478 if (GTK_WIDGET_REALIZED (widget))
1480 gdk_window_move_resize (widget->window,
1481 allocation->x, allocation->y,
1482 allocation->width, allocation->height);
1484 gdk_window_move_resize (menu->view_window,
1491 if (menu_shell->children)
1493 child_allocation.x = 0;
1494 child_allocation.y = 0;
1495 child_allocation.width = width;
1497 children = menu_shell->children;
1500 child = children->data;
1501 children = children->next;
1503 if (GTK_WIDGET_VISIBLE (child))
1505 GtkRequisition child_requisition;
1506 gtk_widget_get_child_requisition (child, &child_requisition);
1508 child_allocation.height = child_requisition.height;
1510 gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
1512 gtk_widget_size_allocate (child, &child_allocation);
1513 gtk_widget_queue_draw (child);
1515 child_allocation.y += child_allocation.height;
1519 /* Resize the item window */
1520 if (GTK_WIDGET_REALIZED (widget))
1522 gdk_window_resize (menu->bin_window,
1523 child_allocation.width,
1524 child_allocation.y);
1528 if (menu->tearoff_active)
1530 if (allocation->height >= widget->requisition.height)
1532 if (GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar))
1534 gtk_widget_hide (menu->tearoff_scrollbar);
1535 gtk_menu_set_tearoff_hints (menu, allocation->width);
1536 gtk_widget_set_usize (menu->tearoff_window, -1, allocation->height);
1538 gtk_menu_scroll_to (menu, 0);
1543 menu->tearoff_adjustment->upper = widget->requisition.height;
1544 menu->tearoff_adjustment->page_size = allocation->height;
1546 if (menu->tearoff_adjustment->value + menu->tearoff_adjustment->page_size >
1547 menu->tearoff_adjustment->upper)
1550 value = menu->tearoff_adjustment->upper - menu->tearoff_adjustment->page_size;
1553 gtk_menu_scroll_to (menu, value);
1556 gtk_adjustment_changed (menu->tearoff_adjustment);
1558 if (!GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar))
1560 gtk_widget_show (menu->tearoff_scrollbar);
1561 gtk_menu_set_tearoff_hints (menu, allocation->width);
1562 gtk_widget_set_usize (menu->tearoff_window, -1, allocation->height);
1570 gtk_menu_paint (GtkWidget *widget,
1571 GdkEventExpose *event)
1575 gint border_x, border_y;
1577 g_return_if_fail (GTK_IS_MENU (widget));
1579 menu = GTK_MENU (widget);
1581 border_x = GTK_CONTAINER (widget)->border_width + widget->style->xthickness;
1582 border_y = GTK_CONTAINER (widget)->border_width + widget->style->ythickness;
1583 gdk_window_get_size (widget->window, &width, &height);
1585 if (event->window == widget->window)
1587 gtk_paint_box (widget->style,
1591 NULL, widget, "menu",
1593 if (menu->upper_arrow_visible && !menu->tearoff_active)
1595 gtk_paint_box (widget->style,
1597 menu->upper_arrow_prelight ?
1598 GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
1600 NULL, widget, "menu",
1604 MENU_SCROLL_ARROW_HEIGHT);
1606 gtk_paint_arrow (widget->style,
1608 menu->upper_arrow_prelight ?
1609 GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
1611 NULL, widget, "menu",
1614 width / 2 - MENU_SCROLL_ARROW_HEIGHT / 2 + 1,
1616 MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2,
1617 MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2);
1620 if (menu->lower_arrow_visible && !menu->tearoff_active)
1622 gtk_paint_box (widget->style,
1624 menu->lower_arrow_prelight ?
1625 GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
1627 NULL, widget, "menu",
1629 height - border_y - MENU_SCROLL_ARROW_HEIGHT + 1,
1631 MENU_SCROLL_ARROW_HEIGHT);
1633 gtk_paint_arrow (widget->style,
1635 menu->lower_arrow_prelight ?
1636 GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
1638 NULL, widget, "menu",
1641 width / 2 - MENU_SCROLL_ARROW_HEIGHT / 2 + 1,
1642 height - MENU_SCROLL_ARROW_HEIGHT + 1,
1643 MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2,
1644 MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2);
1647 else if (event->window == menu->view_window)
1652 if (menu->scroll_offset < 0)
1653 gtk_paint_box (widget->style,
1657 NULL, widget, "menu",
1660 -menu->scroll_offset);
1662 menu_height = widget->requisition.height - 2*border_y;
1663 top_pos = height - 2*border_y - (menu->upper_arrow_visible ? MENU_SCROLL_ARROW_HEIGHT : 0);
1665 if (menu_height - menu->scroll_offset < top_pos)
1666 gtk_paint_box (widget->style,
1670 NULL, widget, "menu",
1672 menu_height - menu->scroll_offset,
1674 top_pos - (menu_height - menu->scroll_offset));
1679 gtk_menu_expose (GtkWidget *widget,
1680 GdkEventExpose *event)
1682 g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
1683 g_return_val_if_fail (event != NULL, FALSE);
1685 if (GTK_WIDGET_DRAWABLE (widget))
1687 gtk_menu_paint (widget, event);
1689 (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
1696 gtk_menu_show (GtkWidget *widget)
1698 GtkMenu *menu = GTK_MENU (widget);
1700 _gtk_menu_refresh_accel_paths (menu, FALSE);
1702 GTK_WIDGET_CLASS (parent_class)->show (widget);
1706 gtk_menu_key_press (GtkWidget *widget,
1709 GtkMenuShell *menu_shell;
1711 gboolean delete = FALSE;
1712 gboolean can_change_accels;
1713 gchar *accel = NULL;
1714 guint accel_key, accel_mods;
1716 g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
1717 g_return_val_if_fail (event != NULL, FALSE);
1719 menu_shell = GTK_MENU_SHELL (widget);
1720 menu = GTK_MENU (widget);
1722 gtk_menu_stop_navigating_submenu (menu);
1724 if (GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
1727 g_object_get (G_OBJECT (gtk_settings_get_default ()),
1728 "gtk-menu-bar-accel",
1735 GdkModifierType mods = 0;
1736 gboolean handled = FALSE;
1738 gtk_accelerator_parse (accel, &keyval, &mods);
1741 g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
1743 /* FIXME this is wrong, needs to be in the global accel resolution
1744 * thing, to properly consider i18n etc., but that probably requires
1745 * AccelGroup changes etc.
1747 if (event->keyval == keyval &&
1748 (mods & event->state) == mods)
1750 gtk_signal_emit_by_name (GTK_OBJECT (menu), "cancel");
1759 switch (event->keyval)
1770 g_object_get (G_OBJECT (gtk_settings_get_default ()),
1771 "gtk-can-change-accels",
1775 accel_key = event->keyval;
1776 accel_mods = event->state & gtk_accelerator_get_default_mod_mask ();
1778 /* Modify the accelerators */
1779 if (can_change_accels &&
1780 menu_shell->active_menu_item &&
1781 GTK_BIN (menu_shell->active_menu_item)->child && /* no seperators */
1782 GTK_MENU_ITEM (menu_shell->active_menu_item)->submenu == NULL && /* no submenus */
1783 (delete || gtk_accelerator_valid (event->keyval, event->state)))
1785 GtkWidget *menu_item = menu_shell->active_menu_item;
1786 gboolean replace_accels = TRUE;
1789 path = GTK_MENU_ITEM (menu_item)->accel_path;
1791 path = _gtk_widget_get_accel_path (menu_item);
1794 /* can't change accelerators on menu_items without paths
1795 * (basically, those items are accelerator-locked).
1797 /* g_print("item has no path, menu prefix: %s\n", menu->accel_path); */
1804 /* For the keys that act to delete the current setting, we delete
1805 * the current setting if there is one, otherwise, we set the
1806 * key as the accelerator.
1812 if (gtk_accel_map_lookup_entry (path, &key) &&
1813 (key.accel_key || key.accel_mods))
1819 changed = gtk_accel_map_change_entry (path, accel_key, accel_mods, replace_accels);
1823 /* we failed, probably because this key is in use and
1826 /* g_print("failed to change\n"); */
1836 gtk_menu_motion_notify (GtkWidget *widget,
1837 GdkEventMotion *event)
1839 GtkWidget *menu_item;
1841 GtkMenuShell *menu_shell;
1843 gboolean need_enter;
1846 if (GTK_IS_MENU (widget))
1847 gtk_menu_handle_scrolling (GTK_MENU (widget), TRUE);
1849 /* We received the event for one of two reasons:
1851 * a) We are the active menu, and did gtk_grab_add()
1852 * b) The widget is a child of ours, and the event was propagated
1854 * Since for computation of navigation regions, we want the menu which
1855 * is the parent of the menu item, for a), we need to find that menu,
1856 * which may be different from 'widget'.
1858 menu_item = gtk_get_event_widget ((GdkEvent*) event);
1859 if (!menu_item || !GTK_IS_MENU_ITEM (menu_item) ||
1860 !_gtk_menu_item_is_selectable (menu_item) ||
1861 !GTK_IS_MENU (menu_item->parent))
1864 menu_shell = GTK_MENU_SHELL (menu_item->parent);
1865 menu = GTK_MENU (menu_shell);
1867 need_enter = (menu->navigation_region != NULL || menu_shell->ignore_enter);
1869 /* Check to see if we are within an active submenu's navigation region
1871 if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root))
1876 /* The menu is now sensitive to enter events on its items, but
1877 * was previously sensitive. So we fake an enter event.
1881 menu_shell->ignore_enter = FALSE;
1883 gdk_window_get_size (event->window, &width, &height);
1884 if (event->x >= 0 && event->x < width &&
1885 event->y >= 0 && event->y < height)
1887 GdkEvent send_event;
1889 memset (&send_event, 0, sizeof (send_event));
1890 send_event.crossing.type = GDK_ENTER_NOTIFY;
1891 send_event.crossing.window = event->window;
1892 send_event.crossing.time = event->time;
1893 send_event.crossing.send_event = TRUE;
1894 send_event.crossing.x_root = event->x_root;
1895 send_event.crossing.y_root = event->y_root;
1896 send_event.crossing.x = event->x;
1897 send_event.crossing.y = event->y;
1899 /* We send the event to 'widget', the currently active menu,
1900 * instead of 'menu', the menu that the pointer is in. This
1901 * will ensure that the event will be ignored unless the
1902 * menuitem is a child of the active menu or some parent
1903 * menu of the active menu.
1905 return gtk_widget_event (widget, &send_event);
1913 gtk_menu_scroll_timeout (gpointer data)
1918 gint view_width, view_height;
1920 GDK_THREADS_ENTER ();
1922 menu = GTK_MENU (data);
1923 widget = GTK_WIDGET (menu);
1925 offset = menu->scroll_offset + menu->scroll_step;
1927 /* If we scroll upward and the non-visible top part
1928 * is smaller than the scroll arrow it would be
1929 * pretty stupid to show the arrow and taking more
1930 * screen space than just scrolling to the top.
1932 if ((menu->scroll_step < 0) && (offset < MENU_SCROLL_ARROW_HEIGHT))
1935 /* Don't scroll over the top if we weren't before: */
1936 if ((menu->scroll_offset >= 0) && (offset < 0))
1939 gdk_window_get_size (widget->window, &view_width, &view_height);
1941 /* Don't scroll past the bottom if we weren't before: */
1942 if (menu->scroll_offset > 0)
1943 view_height -= MENU_SCROLL_ARROW_HEIGHT;
1945 if ((menu->scroll_offset + view_height <= widget->requisition.height) &&
1946 (offset + view_height > widget->requisition.height))
1947 offset = widget->requisition.height - view_height;
1949 gtk_menu_scroll_to (menu, offset);
1951 GDK_THREADS_LEAVE ();
1957 gtk_menu_handle_scrolling (GtkMenu *menu, gboolean enter)
1959 GtkMenuShell *menu_shell;
1965 gboolean scroll_fast = FALSE;
1967 menu_shell = GTK_MENU_SHELL (menu);
1969 gdk_window_get_pointer (GTK_WIDGET (menu)->window, &x, &y, NULL);
1970 gdk_window_get_size (GTK_WIDGET (menu)->window, &width, &height);
1972 border = GTK_CONTAINER (menu)->border_width + GTK_WIDGET (menu)->style->ythickness;
1974 if (menu->upper_arrow_visible && !menu->tearoff_active)
1979 rect.height = MENU_SCROLL_ARROW_HEIGHT + border;
1982 if ((x >= rect.x) && (x < rect.x + rect.width) &&
1983 (y >= rect.y) && (y < rect.y + rect.height))
1986 scroll_fast = (y < rect.y + MENU_SCROLL_FAST_ZONE);
1989 if (enter && in_arrow &&
1990 (!menu->upper_arrow_prelight || menu->scroll_fast != scroll_fast))
1992 menu->upper_arrow_prelight = TRUE;
1993 menu->scroll_fast = scroll_fast;
1994 gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
1996 /* Deselect the active item so that any submenus are poped down */
1997 gtk_menu_shell_deselect (menu_shell);
1999 gtk_menu_stop_scrolling (menu);
2000 menu->scroll_step = -MENU_SCROLL_STEP;
2001 menu->timeout_id = g_timeout_add ((scroll_fast) ? MENU_SCROLL_TIMEOUT2 : MENU_SCROLL_TIMEOUT1,
2002 gtk_menu_scroll_timeout,
2005 else if (!enter && !in_arrow && menu->upper_arrow_prelight)
2007 menu->upper_arrow_prelight = FALSE;
2008 gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
2010 gtk_menu_stop_scrolling (menu);
2014 if (menu->lower_arrow_visible && !menu->tearoff_active)
2017 rect.y = height - border - MENU_SCROLL_ARROW_HEIGHT;
2019 rect.height = MENU_SCROLL_ARROW_HEIGHT + border;
2022 if ((x >= rect.x) && (x < rect.x + rect.width) &&
2023 (y >= rect.y) && (y < rect.y + rect.height))
2026 scroll_fast = (y > rect.y + rect.height - MENU_SCROLL_FAST_ZONE);
2029 if (enter && in_arrow &&
2030 (!menu->lower_arrow_prelight || menu->scroll_fast != scroll_fast))
2032 menu->lower_arrow_prelight = TRUE;
2033 menu->scroll_fast = scroll_fast;
2034 gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
2036 /* Deselect the active item so that any submenus are poped down */
2037 gtk_menu_shell_deselect (menu_shell);
2039 gtk_menu_stop_scrolling (menu);
2040 menu->scroll_step = MENU_SCROLL_STEP;
2041 menu->timeout_id = g_timeout_add ((scroll_fast) ? MENU_SCROLL_TIMEOUT2 : MENU_SCROLL_TIMEOUT1,
2042 gtk_menu_scroll_timeout,
2045 else if (!enter && !in_arrow && menu->lower_arrow_prelight)
2047 menu->lower_arrow_prelight = FALSE;
2048 gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
2050 gtk_menu_stop_scrolling (menu);
2056 gtk_menu_enter_notify (GtkWidget *widget,
2057 GdkEventCrossing *event)
2059 GtkWidget *menu_item;
2061 if (widget && GTK_IS_MENU (widget))
2062 gtk_menu_handle_scrolling (GTK_MENU (widget), TRUE);
2064 /* If this is a faked enter (see gtk_menu_motion_notify), 'widget'
2065 * will not correspond to the event widget's parent. Check to see
2066 * if we are in the parent's navigation region.
2068 menu_item = gtk_get_event_widget ((GdkEvent*) event);
2069 if (menu_item && GTK_IS_MENU_ITEM (menu_item) && GTK_IS_MENU (menu_item->parent) &&
2070 gtk_menu_navigating_submenu (GTK_MENU (menu_item->parent), event->x_root, event->y_root))
2073 return GTK_WIDGET_CLASS (parent_class)->enter_notify_event (widget, event);
2077 gtk_menu_leave_notify (GtkWidget *widget,
2078 GdkEventCrossing *event)
2080 GtkMenuShell *menu_shell;
2082 GtkMenuItem *menu_item;
2083 GtkWidget *event_widget;
2085 menu = GTK_MENU (widget);
2086 menu_shell = GTK_MENU_SHELL (widget);
2088 if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root))
2091 gtk_menu_handle_scrolling (menu, FALSE);
2093 event_widget = gtk_get_event_widget ((GdkEvent*) event);
2095 if (!event_widget || !GTK_IS_MENU_ITEM (event_widget))
2098 menu_item = GTK_MENU_ITEM (event_widget);
2100 /* Here we check to see if we're leaving an active menu item with a submenu,
2101 * in which case we enter submenu navigation mode.
2103 if (menu_shell->active_menu_item != NULL
2104 && menu_item->submenu != NULL
2105 && menu_item->submenu_placement == GTK_LEFT_RIGHT)
2107 if (menu_item->submenu->window != NULL)
2109 gtk_menu_set_submenu_navigation_region (menu, menu_item, event);
2114 return GTK_WIDGET_CLASS (parent_class)->leave_notify_event (widget, event);
2118 gtk_menu_stop_navigating_submenu (GtkMenu *menu)
2120 if (menu->navigation_region)
2122 gdk_region_destroy (menu->navigation_region);
2123 menu->navigation_region = NULL;
2126 if (menu->navigation_timeout)
2128 gtk_timeout_remove (menu->navigation_timeout);
2129 menu->navigation_timeout = 0;
2133 /* When the timeout is elapsed, the navigation region is destroyed
2134 * and the menuitem under the pointer (if any) is selected.
2137 gtk_menu_stop_navigating_submenu_cb (gpointer user_data)
2139 GtkMenu *menu = user_data;
2140 GdkWindow *child_window;
2142 GDK_THREADS_ENTER ();
2144 gtk_menu_stop_navigating_submenu (menu);
2146 if (GTK_WIDGET_REALIZED (menu))
2148 child_window = gdk_window_get_pointer (menu->bin_window, NULL, NULL, NULL);
2152 GdkEventCrossing send_event;
2154 memset (&send_event, 0, sizeof (send_event));
2155 send_event.window = child_window;
2156 send_event.type = GDK_ENTER_NOTIFY;
2157 send_event.time = GDK_CURRENT_TIME; /* Bogus */
2158 send_event.send_event = TRUE;
2160 GTK_WIDGET_CLASS (parent_class)->enter_notify_event (GTK_WIDGET (menu), &send_event);
2164 GDK_THREADS_LEAVE ();
2170 gtk_menu_navigating_submenu (GtkMenu *menu,
2174 if (menu->navigation_region)
2176 if (gdk_region_point_in (menu->navigation_region, event_x, event_y))
2180 gtk_menu_stop_navigating_submenu (menu);
2188 gtk_menu_set_submenu_navigation_region (GtkMenu *menu,
2189 GtkMenuItem *menu_item,
2190 GdkEventCrossing *event)
2192 gint submenu_left = 0;
2193 gint submenu_right = 0;
2194 gint submenu_top = 0;
2195 gint submenu_bottom = 0;
2199 GtkWidget *event_widget;
2201 g_return_if_fail (menu_item->submenu != NULL);
2202 g_return_if_fail (event != NULL);
2204 event_widget = gtk_get_event_widget ((GdkEvent*) event);
2206 gdk_window_get_origin (menu_item->submenu->window, &submenu_left, &submenu_top);
2207 gdk_window_get_size (menu_item->submenu->window, &width, &height);
2208 submenu_right = submenu_left + width;
2209 submenu_bottom = submenu_top + height;
2211 gdk_window_get_size (event_widget->window, &width, &height);
2213 if (event->x >= 0 && event->x < width)
2215 /* Set navigation region */
2216 /* We fudge/give a little padding in case the user
2217 * ``misses the vertex'' of the triangle/is off by a pixel or two.
2219 if (menu_item->submenu_direction == GTK_DIRECTION_RIGHT)
2220 point[0].x = event->x_root - SUBMENU_NAV_REGION_PADDING;
2222 point[0].x = event->x_root + SUBMENU_NAV_REGION_PADDING;
2224 /* Exiting the top or bottom? */
2227 point[0].y = event->y_root + SUBMENU_NAV_REGION_PADDING;
2228 point[1].y = submenu_top;
2230 if (point[0].y <= point[1].y)
2235 point[0].y = event->y_root - SUBMENU_NAV_REGION_PADDING;
2236 point[1].y = submenu_bottom;
2238 if (point[0].y >= point[1].y)
2242 /* Submenu is to the left or right? */
2243 if (menu_item->submenu_direction == GTK_DIRECTION_RIGHT)
2244 point[1].x = submenu_left; /* right */
2246 point[1].x = submenu_right; /* left */
2248 point[2].x = point[1].x;
2249 point[2].y = point[0].y;
2251 gtk_menu_stop_navigating_submenu (menu);
2253 menu->navigation_region = gdk_region_polygon (point, 3, GDK_WINDING_RULE);
2255 menu->navigation_timeout = gtk_timeout_add (SUBMENU_NAV_HYSTERESIS_TIMEOUT,
2256 gtk_menu_stop_navigating_submenu_cb, menu);
2261 gtk_menu_deactivate (GtkMenuShell *menu_shell)
2265 g_return_if_fail (GTK_IS_MENU (menu_shell));
2267 parent = menu_shell->parent_menu_shell;
2269 menu_shell->activate_time = 0;
2270 gtk_menu_popdown (GTK_MENU (menu_shell));
2273 gtk_menu_shell_deactivate (GTK_MENU_SHELL (parent));
2277 gtk_menu_position (GtkMenu *menu)
2280 GtkRequisition requisition;
2288 g_return_if_fail (GTK_IS_MENU (menu));
2290 widget = GTK_WIDGET (menu);
2292 screen_width = gdk_screen_width ();
2293 screen_height = gdk_screen_height ();
2295 gdk_window_get_pointer (NULL, &x, &y, NULL);
2297 /* We need the requisition to figure out the right place to
2298 * popup the menu. In fact, we always need to ask here, since
2299 * if a size_request was queued while we weren't popped up,
2300 * the requisition won't have been recomputed yet.
2302 gtk_widget_size_request (widget, &requisition);
2306 if (menu->position_func)
2307 (* menu->position_func) (menu, &x, &y, &push_in, menu->position_func_data);
2310 x = CLAMP (x - 2, 0, MAX (0, screen_width - requisition.width));
2311 y = CLAMP (y - 2, 0, MAX (0, screen_height - requisition.height));
2318 menu_height = GTK_WIDGET (menu)->requisition.height;
2320 if (y + menu_height > screen_height)
2322 scroll_offset -= y + menu_height - screen_height;
2323 y = screen_height - menu_height;
2333 if (y + requisition.height > screen_height)
2334 requisition.height = screen_height - y;
2339 requisition.height -= -y;
2343 if (scroll_offset > 0)
2344 scroll_offset += MENU_SCROLL_ARROW_HEIGHT;
2346 gtk_window_move (GTK_WINDOW (GTK_MENU_SHELL (menu)->active ? menu->toplevel : menu->tearoff_window),
2348 gtk_widget_set_usize (GTK_MENU_SHELL (menu)->active ?
2349 menu->toplevel : menu->tearoff_hbox,
2350 -1, requisition.height);
2351 menu->scroll_offset = scroll_offset;
2355 gtk_menu_stop_scrolling (GtkMenu *menu)
2357 if (menu->timeout_id)
2359 g_source_remove (menu->timeout_id);
2360 menu->timeout_id = 0;
2366 gtk_menu_scroll_to (GtkMenu *menu,
2371 gint view_width, view_height;
2373 gboolean last_visible;
2376 widget = GTK_WIDGET (menu);
2378 if (menu->tearoff_active &&
2379 menu->tearoff_adjustment &&
2380 (menu->tearoff_adjustment->value != offset))
2382 menu->tearoff_adjustment->value = offset;
2383 gtk_adjustment_value_changed (menu->tearoff_adjustment);
2386 /* Scroll the menu: */
2387 gdk_window_move (menu->bin_window, 0, -offset);
2389 /* Move/resize the viewport according to arrows: */
2390 gdk_window_get_size (widget->window, &view_width, &view_height);
2392 border_width = GTK_CONTAINER (menu)->border_width;
2393 view_width -= (border_width + widget->style->xthickness) * 2;
2394 view_height -= (border_width + widget->style->ythickness) * 2;
2395 menu_height = widget->requisition.height - (border_width + widget->style->ythickness) * 2;
2397 x = border_width + widget->style->xthickness;
2398 y = border_width + widget->style->ythickness;
2400 if (!menu->tearoff_active)
2402 last_visible = menu->upper_arrow_visible;
2403 menu->upper_arrow_visible = (offset > 0);
2405 if (menu->upper_arrow_visible)
2406 view_height -= MENU_SCROLL_ARROW_HEIGHT;
2408 if ( (last_visible != menu->upper_arrow_visible) &&
2409 !menu->upper_arrow_visible)
2411 menu->upper_arrow_prelight = FALSE;
2413 /* If we hid the upper arrow, possibly remove timeout */
2414 if (menu->scroll_step < 0)
2415 gtk_menu_stop_scrolling (menu);
2418 last_visible = menu->lower_arrow_visible;
2419 menu->lower_arrow_visible = (view_height + offset < menu_height);
2421 if (menu->lower_arrow_visible)
2422 view_height -= MENU_SCROLL_ARROW_HEIGHT;
2424 if ( (last_visible != menu->lower_arrow_visible) &&
2425 !menu->lower_arrow_visible)
2427 menu->lower_arrow_prelight = FALSE;
2429 /* If we hid the lower arrow, possibly remove timeout */
2430 if (menu->scroll_step > 0)
2431 gtk_menu_stop_scrolling (menu);
2434 if (menu->upper_arrow_visible)
2435 y += MENU_SCROLL_ARROW_HEIGHT;
2438 gdk_window_move_resize (menu->view_window,
2444 menu->scroll_offset = offset;
2448 gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell,
2449 GtkWidget *menu_item)
2454 GtkRequisition child_requisition;
2455 gint child_offset, child_height;
2459 gboolean last_child = 0;
2461 menu = GTK_MENU (menu_shell);
2463 /* We need to check if the selected item fully visible.
2464 * If not we need to scroll the menu so that it becomes fully
2471 children = menu_shell->children;
2474 child = children->data;
2475 children = children->next;
2477 if (GTK_WIDGET_VISIBLE (child))
2479 gtk_widget_size_request (child, &child_requisition);
2480 child_offset += child_height;
2481 child_height = child_requisition.height;
2484 if (child == menu_item)
2486 last_child = (children == NULL);
2491 if (child == menu_item)
2493 y = menu->scroll_offset;
2494 gdk_window_get_size (GTK_WIDGET (menu)->window, &width, &height);
2496 height -= 2*GTK_CONTAINER (menu)->border_width + 2*GTK_WIDGET (menu)->style->ythickness;
2498 if (child_offset + child_height <= y)
2500 /* Ignore the enter event we might get if the pointer is on the menu
2502 menu_shell->ignore_enter = TRUE;
2503 gtk_menu_scroll_to (menu, child_offset);
2508 if (menu->upper_arrow_visible && !menu->tearoff_active)
2509 arrow_height += MENU_SCROLL_ARROW_HEIGHT;
2510 if (menu->lower_arrow_visible && !menu->tearoff_active)
2511 arrow_height += MENU_SCROLL_ARROW_HEIGHT;
2513 if (child_offset >= y + height - arrow_height)
2516 if (!last_child && !menu->tearoff_active)
2517 arrow_height += MENU_SCROLL_ARROW_HEIGHT;
2519 y = child_offset + child_height - height + arrow_height;
2520 if ((y > 0) && !menu->tearoff_active)
2522 /* Need upper arrow */
2523 arrow_height += MENU_SCROLL_ARROW_HEIGHT;
2524 y = child_offset + child_height - height + arrow_height;
2526 /* Ignore the enter event we might get if the pointer is on the menu
2528 menu_shell->ignore_enter = TRUE;
2529 gtk_menu_scroll_to (menu, y);
2537 gtk_menu_select_item (GtkMenuShell *menu_shell,
2538 GtkWidget *menu_item)
2540 GtkMenu *menu = GTK_MENU (menu_shell);
2542 if (GTK_WIDGET_REALIZED (GTK_WIDGET (menu)))
2543 gtk_menu_scroll_item_visible (menu_shell, menu_item);
2545 GTK_MENU_SHELL_CLASS (parent_class)->select_item (menu_shell, menu_item);
2549 /* Reparent the menu, taking care of the refcounting
2551 * If unrealize is true we force a unrealize while reparenting the parent.
2552 * This can help eliminate flicker in some cases.
2554 * What happens is that when the menu is unrealized and then re-realized,
2555 * the allocations are as follows:
2557 * parent - 1x1 at (0,0)
2558 * child1 - 100x20 at (0,0)
2559 * child2 - 100x20 at (0,20)
2560 * child3 - 100x20 at (0,40)
2562 * That is, the parent is small but the children are full sized. Then,
2563 * when the queued_resize gets processed, the parent gets resized to
2566 * But in order to eliminate flicker when scrolling, gdkgeometry-x11.c
2567 * contains the following logic:
2569 * - if a move or resize operation on a window would change the clip
2570 * region on the children, then before the window is resized
2571 * the background for children is temporarily set to None, the
2572 * move/resize done, and the background for the children restored.
2574 * So, at the point where the parent is resized to final size, the
2575 * background for the children is temporarily None, and thus they
2576 * are not cleared to the background color and the previous background
2577 * (the image of the menu) is left in place.
2580 gtk_menu_reparent (GtkMenu *menu,
2581 GtkWidget *new_parent,
2584 GtkObject *object = GTK_OBJECT (menu);
2585 GtkWidget *widget = GTK_WIDGET (menu);
2586 gboolean was_floating = GTK_OBJECT_FLOATING (object);
2588 gtk_object_ref (object);
2589 gtk_object_sink (object);
2593 gtk_object_ref (object);
2594 gtk_container_remove (GTK_CONTAINER (widget->parent), widget);
2595 gtk_container_add (GTK_CONTAINER (new_parent), widget);
2596 gtk_object_unref (object);
2599 gtk_widget_reparent (GTK_WIDGET (menu), new_parent);
2602 GTK_OBJECT_SET_FLAGS (object, GTK_FLOATING);
2604 gtk_object_unref (object);
2608 gtk_menu_show_all (GtkWidget *widget)
2610 g_return_if_fail (GTK_IS_MENU (widget));
2612 /* Show children, but not self. */
2613 gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_show_all, NULL);
2618 gtk_menu_hide_all (GtkWidget *widget)
2620 g_return_if_fail (GTK_IS_MENU (widget));
2622 /* Hide children, but not self. */
2623 gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_hide_all, NULL);