/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include /* memset */ #include "gdk/gdkkeysyms.h" #include "gtkaccelmap.h" #include "gtkbindings.h" #include "gtklabel.h" #include "gtkmain.h" #include "gtkmenu.h" #include "gtkmenuitem.h" #include "gtksignal.h" #include "gtkwindow.h" #include "gtkhbox.h" #include "gtkvscrollbar.h" #include "gtksettings.h" #include "gtkintl.h" #define MENU_ITEM_CLASS(w) GTK_MENU_ITEM_GET_CLASS (w) #define MENU_NEEDS_RESIZE(m) GTK_MENU_SHELL (m)->menu_flag #define SUBMENU_NAV_REGION_PADDING 2 #define SUBMENU_NAV_HYSTERESIS_TIMEOUT 333 #define MENU_SCROLL_STEP 10 #define MENU_SCROLL_ARROW_HEIGHT 16 #define MENU_SCROLL_FAST_ZONE 4 #define MENU_SCROLL_TIMEOUT1 150 #define MENU_SCROLL_TIMEOUT2 50 typedef struct _GtkMenuAttachData GtkMenuAttachData; struct _GtkMenuAttachData { GtkWidget *attach_widget; GtkMenuDetachFunc detacher; }; enum { PROP_0, PROP_TEAROFF_TITLE }; static void gtk_menu_class_init (GtkMenuClass *klass); static void gtk_menu_init (GtkMenu *menu); static void gtk_menu_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_menu_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_menu_destroy (GtkObject *object); static void gtk_menu_finalize (GObject *object); static void gtk_menu_realize (GtkWidget *widget); static void gtk_menu_unrealize (GtkWidget *widget); static void gtk_menu_size_request (GtkWidget *widget, GtkRequisition *requisition); static void gtk_menu_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static void gtk_menu_paint (GtkWidget *widget, GdkEventExpose *expose); static void gtk_menu_show (GtkWidget *widget); static gboolean gtk_menu_expose (GtkWidget *widget, GdkEventExpose *event); static gboolean gtk_menu_key_press (GtkWidget *widget, GdkEventKey *event); static gboolean gtk_menu_motion_notify (GtkWidget *widget, GdkEventMotion *event); static gboolean gtk_menu_enter_notify (GtkWidget *widget, GdkEventCrossing *event); static gboolean gtk_menu_leave_notify (GtkWidget *widget, GdkEventCrossing *event); static void gtk_menu_scroll_to (GtkMenu *menu, gint offset); static void gtk_menu_stop_scrolling (GtkMenu *menu); static gboolean gtk_menu_scroll_timeout (gpointer data); static void gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell, GtkWidget *menu_item); static void gtk_menu_select_item (GtkMenuShell *menu_shell, GtkWidget *menu_item); static void gtk_menu_real_insert (GtkMenuShell *menu_shell, GtkWidget *child, gint position); static void gtk_menu_scrollbar_changed (GtkAdjustment *adjustment, GtkMenu *menu); static void gtk_menu_handle_scrolling (GtkMenu *menu, gboolean enter); static void gtk_menu_set_tearoff_hints (GtkMenu *menu, gint width); static void gtk_menu_stop_navigating_submenu (GtkMenu *menu); static gboolean gtk_menu_stop_navigating_submenu_cb (gpointer user_data); static gboolean gtk_menu_navigating_submenu (GtkMenu *menu, gint event_x, gint event_y); static void gtk_menu_set_submenu_navigation_region (GtkMenu *menu, GtkMenuItem *menu_item, GdkEventCrossing *event); static void gtk_menu_deactivate (GtkMenuShell *menu_shell); static void gtk_menu_show_all (GtkWidget *widget); static void gtk_menu_hide_all (GtkWidget *widget); static void gtk_menu_position (GtkMenu *menu); static void gtk_menu_reparent (GtkMenu *menu, GtkWidget *new_parent, gboolean unrealize); static void gtk_menu_remove (GtkContainer *menu, GtkWidget *widget); static void gtk_menu_update_title (GtkMenu *menu); static void menu_grab_transfer_window_destroy (GtkMenu *menu); static GdkWindow *menu_grab_transfer_window_get (GtkMenu *menu); static void _gtk_menu_refresh_accel_paths (GtkMenu *menu, gboolean group_changed); static GtkMenuShellClass *parent_class = NULL; static const gchar *attach_data_key = "gtk-menu-attach-data"; GtkType gtk_menu_get_type (void) { static GtkType menu_type = 0; if (!menu_type) { static const GtkTypeInfo menu_info = { "GtkMenu", sizeof (GtkMenu), sizeof (GtkMenuClass), (GtkClassInitFunc) gtk_menu_class_init, (GtkObjectInitFunc) gtk_menu_init, /* reserved_1 */ NULL, /* reserved_2 */ NULL, (GtkClassInitFunc) NULL, }; menu_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_info); } return menu_type; } static void gtk_menu_class_init (GtkMenuClass *class) { GObjectClass *gobject_class = G_OBJECT_CLASS (class); GtkObjectClass *object_class = GTK_OBJECT_CLASS (class); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class); GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class); GtkMenuShellClass *menu_shell_class = GTK_MENU_SHELL_CLASS (class); GtkBindingSet *binding_set; parent_class = g_type_class_peek_parent (class); gobject_class->finalize = gtk_menu_finalize; gobject_class->set_property = gtk_menu_set_property; gobject_class->get_property = gtk_menu_get_property; g_object_class_install_property (gobject_class, PROP_TEAROFF_TITLE, g_param_spec_string ("tearoff-title", _("Tearoff Title"), _("A title that may be displayed by the window manager when this menu is torn-off."), "", G_PARAM_READABLE | G_PARAM_WRITABLE)); object_class->destroy = gtk_menu_destroy; widget_class->realize = gtk_menu_realize; widget_class->unrealize = gtk_menu_unrealize; widget_class->size_request = gtk_menu_size_request; widget_class->size_allocate = gtk_menu_size_allocate; widget_class->show = gtk_menu_show; widget_class->expose_event = gtk_menu_expose; widget_class->key_press_event = gtk_menu_key_press; widget_class->motion_notify_event = gtk_menu_motion_notify; widget_class->show_all = gtk_menu_show_all; widget_class->hide_all = gtk_menu_hide_all; widget_class->enter_notify_event = gtk_menu_enter_notify; widget_class->leave_notify_event = gtk_menu_leave_notify; container_class->remove = gtk_menu_remove; menu_shell_class->submenu_placement = GTK_LEFT_RIGHT; menu_shell_class->deactivate = gtk_menu_deactivate; menu_shell_class->select_item = gtk_menu_select_item; menu_shell_class->insert = gtk_menu_real_insert; binding_set = gtk_binding_set_by_class (class); gtk_binding_entry_add_signal (binding_set, GDK_Up, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_PREV); gtk_binding_entry_add_signal (binding_set, GDK_KP_Up, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_PREV); gtk_binding_entry_add_signal (binding_set, GDK_Down, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_NEXT); gtk_binding_entry_add_signal (binding_set, GDK_KP_Down, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_NEXT); gtk_binding_entry_add_signal (binding_set, GDK_Left, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_PARENT); gtk_binding_entry_add_signal (binding_set, GDK_KP_Left, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_PARENT); gtk_binding_entry_add_signal (binding_set, GDK_Right, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_CHILD); gtk_binding_entry_add_signal (binding_set, GDK_KP_Right, 0, "move_current", 1, GTK_TYPE_MENU_DIRECTION_TYPE, GTK_MENU_DIR_CHILD); gtk_settings_install_property (g_param_spec_boolean ("gtk-can-change-accels", _("Can change accelerators"), _("Whether menu accelerators can be changed by pressing a key over the menu item."), FALSE, G_PARAM_READWRITE)); } static void gtk_menu_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkMenu *menu; menu = GTK_MENU (object); switch (prop_id) { case PROP_TEAROFF_TITLE: gtk_menu_set_title (menu, g_value_get_string (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_menu_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkMenu *menu; menu = GTK_MENU (object); switch (prop_id) { case PROP_TEAROFF_TITLE: g_value_set_string (value, gtk_menu_get_title (menu)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean gtk_menu_window_event (GtkWidget *window, GdkEvent *event, GtkWidget *menu) { gboolean handled = FALSE; gtk_widget_ref (window); gtk_widget_ref (menu); switch (event->type) { case GDK_KEY_PRESS: case GDK_KEY_RELEASE: handled = gtk_widget_event (menu, event); break; default: break; } gtk_widget_unref (window); gtk_widget_unref (menu); return handled; } static void gtk_menu_init (GtkMenu *menu) { menu->parent_menu_item = NULL; menu->old_active_menu_item = NULL; menu->accel_group = NULL; menu->position_func = NULL; menu->position_func_data = NULL; menu->toggle_size = 0; menu->toplevel = g_object_connect (gtk_widget_new (GTK_TYPE_WINDOW, "type", GTK_WINDOW_POPUP, "child", menu, NULL), "signal::event", gtk_menu_window_event, menu, "signal::destroy", gtk_widget_destroyed, &menu->toplevel, NULL); gtk_window_set_policy (GTK_WINDOW (menu->toplevel), FALSE, FALSE, TRUE); gtk_window_set_mnemonic_modifier (GTK_WINDOW (menu->toplevel), 0); /* Refloat the menu, so that reference counting for the menu isn't * affected by it being a child of the toplevel */ GTK_WIDGET_SET_FLAGS (menu, GTK_FLOATING); menu->needs_destruction_ref_count = TRUE; menu->view_window = NULL; menu->bin_window = NULL; menu->scroll_offset = 0; menu->scroll_step = 0; menu->timeout_id = 0; menu->scroll_fast = FALSE; menu->tearoff_window = NULL; menu->tearoff_hbox = NULL; menu->torn_off = FALSE; menu->tearoff_active = FALSE; menu->tearoff_adjustment = NULL; menu->tearoff_scrollbar = NULL; menu->upper_arrow_visible = FALSE; menu->lower_arrow_visible = FALSE; menu->upper_arrow_prelight = FALSE; menu->lower_arrow_prelight = FALSE; MENU_NEEDS_RESIZE (menu) = TRUE; } static void gtk_menu_destroy (GtkObject *object) { GtkMenu *menu; GtkMenuAttachData *data; g_return_if_fail (GTK_IS_MENU (object)); menu = GTK_MENU (object); gtk_menu_stop_scrolling (menu); data = gtk_object_get_data (object, attach_data_key); if (data) gtk_menu_detach (menu); gtk_menu_stop_navigating_submenu (menu); if (menu->old_active_menu_item) { gtk_widget_unref (menu->old_active_menu_item); menu->old_active_menu_item = NULL; } /* Add back the reference count for being a child */ if (menu->needs_destruction_ref_count) { menu->needs_destruction_ref_count = FALSE; gtk_object_ref (object); } if (menu->accel_group) { g_object_unref (menu->accel_group); menu->accel_group = NULL; } if (menu->toplevel) gtk_widget_destroy (menu->toplevel); if (menu->tearoff_window) gtk_widget_destroy (menu->tearoff_window); GTK_OBJECT_CLASS (parent_class)->destroy (object); } static void gtk_menu_finalize (GObject *object) { GtkMenu *menu = GTK_MENU (object); g_free (menu->accel_path); G_OBJECT_CLASS (parent_class)->finalize (object); } void gtk_menu_attach_to_widget (GtkMenu *menu, GtkWidget *attach_widget, GtkMenuDetachFunc detacher) { GtkMenuAttachData *data; g_return_if_fail (GTK_IS_MENU (menu)); g_return_if_fail (GTK_IS_WIDGET (attach_widget)); g_return_if_fail (detacher != NULL); /* keep this function in sync with gtk_widget_set_parent() */ data = gtk_object_get_data (GTK_OBJECT (menu), attach_data_key); if (data) { g_warning ("gtk_menu_attach_to_widget(): menu already attached to %s", gtk_type_name (GTK_OBJECT_TYPE (data->attach_widget))); return; } gtk_object_ref (GTK_OBJECT (menu)); gtk_object_sink (GTK_OBJECT (menu)); data = g_new (GtkMenuAttachData, 1); data->attach_widget = attach_widget; data->detacher = detacher; gtk_object_set_data (GTK_OBJECT (menu), attach_data_key, data); if (GTK_WIDGET_STATE (menu) != GTK_STATE_NORMAL) gtk_widget_set_state (GTK_WIDGET (menu), GTK_STATE_NORMAL); /* we don't need to set the style here, since * we are a toplevel widget. */ /* Fallback title for menu comes from attach widget */ gtk_menu_update_title (menu); } GtkWidget* gtk_menu_get_attach_widget (GtkMenu *menu) { GtkMenuAttachData *data; g_return_val_if_fail (GTK_IS_MENU (menu), NULL); data = gtk_object_get_data (GTK_OBJECT (menu), attach_data_key); if (data) return data->attach_widget; return NULL; } void gtk_menu_detach (GtkMenu *menu) { GtkMenuAttachData *data; g_return_if_fail (GTK_IS_MENU (menu)); /* keep this function in sync with gtk_widget_unparent() */ data = gtk_object_get_data (GTK_OBJECT (menu), attach_data_key); if (!data) { g_warning ("gtk_menu_detach(): menu is not attached"); return; } gtk_object_remove_data (GTK_OBJECT (menu), attach_data_key); data->detacher (data->attach_widget, menu); if (GTK_WIDGET_REALIZED (menu)) gtk_widget_unrealize (GTK_WIDGET (menu)); g_free (data); /* Fallback title for menu comes from attach widget */ gtk_menu_update_title (menu); gtk_widget_unref (GTK_WIDGET (menu)); } static void gtk_menu_remove (GtkContainer *container, GtkWidget *widget) { GtkMenu *menu; g_return_if_fail (GTK_IS_MENU (container)); g_return_if_fail (GTK_IS_MENU_ITEM (widget)); menu = GTK_MENU (container); /* Clear out old_active_menu_item if it matches the item we are removing */ if (menu->old_active_menu_item == widget) { gtk_widget_unref (menu->old_active_menu_item); menu->old_active_menu_item = NULL; } GTK_CONTAINER_CLASS (parent_class)->remove (container, widget); } GtkWidget* gtk_menu_new (void) { return GTK_WIDGET (gtk_type_new (gtk_menu_get_type ())); } static void gtk_menu_real_insert (GtkMenuShell *menu_shell, GtkWidget *child, gint position) { if (GTK_WIDGET_REALIZED (menu_shell)) gtk_widget_set_parent_window (child, GTK_MENU (menu_shell)->bin_window); GTK_MENU_SHELL_CLASS (parent_class)->insert (menu_shell, child, position); } static void gtk_menu_tearoff_bg_copy (GtkMenu *menu) { GtkWidget *widget; gint width, height; widget = GTK_WIDGET (menu); if (menu->torn_off) { GdkPixmap *pixmap; GdkGC *gc; GdkGCValues gc_values; menu->tearoff_active = FALSE; menu->saved_scroll_offset = menu->scroll_offset; gc_values.subwindow_mode = GDK_INCLUDE_INFERIORS; gc = gdk_gc_new_with_values (widget->window, &gc_values, GDK_GC_SUBWINDOW); gdk_window_get_size (menu->tearoff_window->window, &width, &height); pixmap = gdk_pixmap_new (menu->tearoff_window->window, width, height, -1); gdk_draw_pixmap (pixmap, gc, menu->tearoff_window->window, 0, 0, 0, 0, -1, -1); gdk_gc_unref (gc); gtk_widget_set_usize (menu->tearoff_window, width, height); gdk_window_set_back_pixmap (menu->tearoff_window->window, pixmap, FALSE); gdk_pixmap_unref (pixmap); } } static gboolean popup_grab_on_window (GdkWindow *window, guint32 activate_time) { if ((gdk_pointer_grab (window, TRUE, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_POINTER_MOTION_MASK, NULL, NULL, activate_time) == 0)) { if (gdk_keyboard_grab (window, TRUE, activate_time) == 0) return TRUE; else { gdk_display_pointer_ungrab (gdk_drawable_get_display (window), activate_time); return FALSE; } } return FALSE; } void gtk_menu_popup (GtkMenu *menu, GtkWidget *parent_menu_shell, GtkWidget *parent_menu_item, GtkMenuPositionFunc func, gpointer data, guint button, guint32 activate_time) { GtkWidget *widget; GtkWidget *xgrab_shell; GtkWidget *parent; GdkEvent *current_event; GtkMenuShell *menu_shell; GtkMenuAttachData *attach_data; g_return_if_fail (GTK_IS_MENU (menu)); widget = GTK_WIDGET (menu); menu_shell = GTK_MENU_SHELL (menu); menu_shell->parent_menu_shell = parent_menu_shell; if (!g_object_get_data (G_OBJECT (menu), "gtk-menu-explicit-screen")) { /* The screen was not set explicitly, if the menu is * attached to a widget, try to get screen from its * toplevel window else go with the default */ attach_data = gtk_object_get_data (GTK_OBJECT (menu), attach_data_key); if (attach_data) { if (!GTK_WIDGET_REALIZED (menu)) gtk_window_set_screen (GTK_WINDOW (menu->toplevel), gtk_widget_get_screen (attach_data->attach_widget)); } } /* Find the last viewable ancestor, and make an X grab on it */ parent = GTK_WIDGET (menu); xgrab_shell = NULL; while (parent) { gboolean viewable = TRUE; GtkWidget *tmp = parent; while (tmp) { if (!GTK_WIDGET_MAPPED (tmp)) { viewable = FALSE; break; } tmp = tmp->parent; } if (viewable) xgrab_shell = parent; parent = GTK_MENU_SHELL (parent)->parent_menu_shell; } /* We want to receive events generated when we map the menu; unfortunately, * since there is probably already an implicit grab in place from the * button that the user used to pop up the menu, we won't receive then -- * in particular, the EnterNotify when the menu pops up under the pointer. * * If we are grabbing on a parent menu shell, no problem; just grab on * that menu shell first before popping up the window with owner_events = TRUE. * * When grabbing on the menu itself, things get more convuluted - we * we do an explicit grab on a specially created window with * owner_events = TRUE, which we override further down with a grab * on the menu. (We can't grab on the menu until it is mapped; we * probably could just leave the grab on the other window, with a * little reorganization of the code in gtkmenu*). */ if (xgrab_shell && xgrab_shell != widget) { if (popup_grab_on_window (xgrab_shell->window, activate_time)) GTK_MENU_SHELL (xgrab_shell)->have_xgrab = TRUE; } else { GdkWindow *transfer_window; xgrab_shell = widget; transfer_window = menu_grab_transfer_window_get (menu); if (popup_grab_on_window (transfer_window, activate_time)) GTK_MENU_SHELL (xgrab_shell)->have_xgrab = TRUE; } if (!GTK_MENU_SHELL (xgrab_shell)->have_xgrab) { /* We failed to make our pointer/keyboard grab. Rather than leaving the user * with a stuck up window, we just abort here. Presumably the user will * try again. */ menu_shell->parent_menu_shell = NULL; return; } menu_shell->active = TRUE; menu_shell->button = button; /* If we are popping up the menu from something other than, a button * press then, as a heuristic, we ignore enter events for the menu * until we get a MOTION_NOTIFY. */ current_event = gtk_get_current_event (); if (current_event) { if ((current_event->type != GDK_BUTTON_PRESS) && (current_event->type != GDK_ENTER_NOTIFY)) menu_shell->ignore_enter = TRUE; gdk_event_free (current_event); } if (menu->torn_off) { gtk_menu_tearoff_bg_copy (menu); gtk_menu_reparent (menu, menu->toplevel, FALSE); } menu->parent_menu_item = parent_menu_item; menu->position_func = func; menu->position_func_data = data; menu_shell->activate_time = activate_time; /* We need to show the menu here rather in the init function because * code expects to be able to tell if the menu is onscreen by * looking at the GTK_WIDGET_VISIBLE (menu) */ gtk_widget_show (GTK_WIDGET (menu)); /* Position the menu, possibly changing the size request */ gtk_menu_position (menu); /* Compute the size of the toplevel and realize it so we * can scroll correctly. */ { GtkRequisition tmp_request; GtkAllocation tmp_allocation = { 0, }; gtk_widget_size_request (menu->toplevel, &tmp_request); tmp_allocation.width = tmp_request.width; tmp_allocation.height = tmp_request.height; gtk_widget_size_allocate (menu->toplevel, &tmp_allocation); gtk_widget_realize (GTK_WIDGET (menu)); } gtk_menu_scroll_to (menu, menu->scroll_offset); /* Once everything is set up correctly, map the toplevel window on the screen. */ gtk_widget_show (menu->toplevel); if (xgrab_shell == widget) popup_grab_on_window (widget->window, activate_time); /* Should always succeed */ gtk_grab_add (GTK_WIDGET (menu)); } void gtk_menu_popdown (GtkMenu *menu) { GtkMenuShell *menu_shell; g_return_if_fail (GTK_IS_MENU (menu)); menu_shell = GTK_MENU_SHELL (menu); menu_shell->parent_menu_shell = NULL; menu_shell->active = FALSE; menu_shell->ignore_enter = FALSE; gtk_menu_stop_scrolling (menu); gtk_menu_stop_navigating_submenu (menu); if (menu_shell->active_menu_item) { if (menu->old_active_menu_item) gtk_widget_unref (menu->old_active_menu_item); menu->old_active_menu_item = menu_shell->active_menu_item; gtk_widget_ref (menu->old_active_menu_item); } gtk_menu_shell_deselect (menu_shell); /* The X Grab, if present, will automatically be removed when we hide * the window */ gtk_widget_hide (menu->toplevel); if (menu->torn_off) { gint width, height; gdk_window_get_size (menu->tearoff_window->window, &width, &height); gtk_widget_set_usize (menu->tearoff_window, -1, height); if (GTK_BIN (menu->toplevel)->child) { gtk_menu_reparent (menu, menu->tearoff_hbox, TRUE); } else { /* We popped up the menu from the tearoff, so we need to * release the grab - we aren't actually hiding the menu. */ if (menu_shell->have_xgrab) { GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET (menu)); gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME); gdk_display_keyboard_ungrab (display, GDK_CURRENT_TIME); } } /* gtk_menu_popdown is called each time a menu item is selected from * a torn off menu. Only scroll back to the saved position if the * non-tearoff menu was popped down. */ if (!menu->tearoff_active) gtk_menu_scroll_to (menu, menu->saved_scroll_offset); menu->tearoff_active = TRUE; } else gtk_widget_hide (GTK_WIDGET (menu)); menu_shell->have_xgrab = FALSE; gtk_grab_remove (GTK_WIDGET (menu)); menu_grab_transfer_window_destroy (menu); } GtkWidget* gtk_menu_get_active (GtkMenu *menu) { GtkWidget *child; GList *children; g_return_val_if_fail (GTK_IS_MENU (menu), NULL); if (!menu->old_active_menu_item) { child = NULL; children = GTK_MENU_SHELL (menu)->children; while (children) { child = children->data; children = children->next; if (GTK_BIN (child)->child) break; child = NULL; } menu->old_active_menu_item = child; if (menu->old_active_menu_item) gtk_widget_ref (menu->old_active_menu_item); } return menu->old_active_menu_item; } void gtk_menu_set_active (GtkMenu *menu, guint index) { GtkWidget *child; GList *tmp_list; g_return_if_fail (GTK_IS_MENU (menu)); tmp_list = g_list_nth (GTK_MENU_SHELL (menu)->children, index); if (tmp_list) { child = tmp_list->data; if (GTK_BIN (child)->child) { if (menu->old_active_menu_item) gtk_widget_unref (menu->old_active_menu_item); menu->old_active_menu_item = child; gtk_widget_ref (menu->old_active_menu_item); } } } void gtk_menu_set_accel_group (GtkMenu *menu, GtkAccelGroup *accel_group) { g_return_if_fail (GTK_IS_MENU (menu)); if (menu->accel_group != accel_group) { if (menu->accel_group) gtk_accel_group_unref (menu->accel_group); menu->accel_group = accel_group; if (menu->accel_group) gtk_accel_group_ref (menu->accel_group); _gtk_menu_refresh_accel_paths (menu, TRUE); } } GtkAccelGroup* gtk_menu_get_accel_group (GtkMenu *menu) { g_return_val_if_fail (GTK_IS_MENU (menu), NULL); return menu->accel_group; } /** * gtk_menu_set_accel_path * @menu: a valid #GtkMenu * @accel_path: a valid accelerator path * * Sets an accelerator path for this menu from which accelerator paths * for its immediate children, its menu items, can be constructed. * The main purpose of this function is to spare the programmer the * inconvenience of having to call gtk_menu_item_set_accel_path() on * each menu item that should support runtime user changable accelerators. * Instead, by just calling gtk_menu_set_accel_path() on their parent, * each menu item of this menu, that contains a label describing its purpose, * automatically gets an accel path assigned. For example, a menu containing * menu items "New" and "Exit", will, after * gtk_menu_set_accel_path (menu, "<Gnumeric-Sheet>/File"); * has been called, assign its items the accel paths: * "<Gnumeric-Sheet>/File/New" and "<Gnumeric-Sheet>/File/Exit". * Assigning accel paths to menu items then enables the user to change * their accelerators at runtime. More details about accelerator paths * and their default setups can be found at gtk_accel_map_add_entry(). */ void gtk_menu_set_accel_path (GtkMenu *menu, const gchar *accel_path) { g_return_if_fail (GTK_IS_MENU (menu)); if (accel_path) g_return_if_fail (accel_path[0] == '<' && strchr (accel_path, '/')); /* simplistic check */ g_free (menu->accel_path); menu->accel_path = g_strdup (accel_path); if (menu->accel_path) _gtk_menu_refresh_accel_paths (menu, FALSE); } typedef struct { GtkMenu *menu; gboolean group_changed; } AccelPropagation; static void refresh_accel_paths_foreach (GtkWidget *widget, gpointer data) { AccelPropagation *prop = data; if (GTK_IS_MENU_ITEM (widget)) /* should always be true */ _gtk_menu_item_refresh_accel_path (GTK_MENU_ITEM (widget), prop->menu->accel_path, prop->menu->accel_group, prop->group_changed); } static void _gtk_menu_refresh_accel_paths (GtkMenu *menu, gboolean group_changed) { g_return_if_fail (GTK_IS_MENU (menu)); if (menu->accel_path && menu->accel_group) { AccelPropagation prop; prop.menu = menu; prop.group_changed = group_changed; gtk_container_foreach (GTK_CONTAINER (menu), refresh_accel_paths_foreach, &prop); } } void gtk_menu_reposition (GtkMenu *menu) { g_return_if_fail (GTK_IS_MENU (menu)); if (GTK_WIDGET_DRAWABLE (menu) && !menu->torn_off) gtk_menu_position (menu); } static void gtk_menu_scrollbar_changed (GtkAdjustment *adjustment, GtkMenu *menu) { g_return_if_fail (GTK_IS_MENU (menu)); if (adjustment->value != menu->scroll_offset) gtk_menu_scroll_to (menu, adjustment->value); } static void gtk_menu_set_tearoff_hints (GtkMenu *menu, gint width) { GdkGeometry geometry_hints; if (!menu->tearoff_window) return; if (GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar)) { gtk_widget_size_request (menu->tearoff_scrollbar, NULL); width += menu->tearoff_scrollbar->requisition.width; } geometry_hints.min_width = width; geometry_hints.max_width = width; geometry_hints.min_height = 0; geometry_hints.max_height = GTK_WIDGET (menu)->requisition.height; gtk_window_set_geometry_hints (GTK_WINDOW (menu->tearoff_window), NULL, &geometry_hints, GDK_HINT_MAX_SIZE|GDK_HINT_MIN_SIZE); } static void gtk_menu_update_title (GtkMenu *menu) { if (menu->tearoff_window) { const gchar *title; GtkWidget *attach_widget; title = gtk_menu_get_title (menu); if (!title) { attach_widget = gtk_menu_get_attach_widget (menu); if (GTK_IS_MENU_ITEM (attach_widget)) { GtkWidget *child = GTK_BIN (attach_widget)->child; if (GTK_IS_LABEL (child)) title = gtk_label_get_text (GTK_LABEL (child)); } } if (title) gtk_window_set_title (GTK_WINDOW (menu->tearoff_window), title); } } void gtk_menu_set_tearoff_state (GtkMenu *menu, gboolean torn_off) { gint width, height; g_return_if_fail (GTK_IS_MENU (menu)); if (menu->torn_off != torn_off) { menu->torn_off = torn_off; menu->tearoff_active = torn_off; if (menu->torn_off) { if (GTK_WIDGET_VISIBLE (menu)) gtk_menu_popdown (menu); if (!menu->tearoff_window) { menu->tearoff_window = gtk_widget_new (GTK_TYPE_WINDOW, "type", GTK_WINDOW_TOPLEVEL, "screen", gtk_widget_get_screen (menu->toplevel), "app_paintable", TRUE, NULL); gtk_window_set_type_hint (GTK_WINDOW (menu->tearoff_window), GDK_WINDOW_TYPE_HINT_MENU); gtk_window_set_mnemonic_modifier (GTK_WINDOW (menu->tearoff_window), 0); g_signal_connect (menu->tearoff_window, "destroy", G_CALLBACK (gtk_widget_destroyed), &menu->tearoff_window); g_signal_connect (menu->tearoff_window, "event", G_CALLBACK (gtk_menu_window_event), menu); gtk_menu_update_title (menu); gtk_widget_realize (menu->tearoff_window); gdk_window_set_decorations (menu->tearoff_window->window, GDK_DECOR_ALL | GDK_DECOR_RESIZEH | GDK_DECOR_MINIMIZE | GDK_DECOR_MAXIMIZE); gtk_window_set_resizable (GTK_WINDOW (menu->tearoff_window), FALSE); menu->tearoff_hbox = gtk_hbox_new (FALSE, FALSE); gtk_container_add (GTK_CONTAINER (menu->tearoff_window), menu->tearoff_hbox); gdk_window_get_size (GTK_WIDGET (menu)->window, &width, &height); menu->tearoff_adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0, 0, GTK_WIDGET (menu)->requisition.height, MENU_SCROLL_STEP, height/2, height)); g_object_connect (GTK_OBJECT (menu->tearoff_adjustment), "signal::value_changed", gtk_menu_scrollbar_changed, menu, NULL); menu->tearoff_scrollbar = gtk_vscrollbar_new (menu->tearoff_adjustment); gtk_box_pack_end (GTK_BOX (menu->tearoff_hbox), menu->tearoff_scrollbar, FALSE, FALSE, 0); if (menu->tearoff_adjustment->upper > height) gtk_widget_show (menu->tearoff_scrollbar); gtk_widget_show (menu->tearoff_hbox); } gtk_menu_reparent (menu, menu->tearoff_hbox, FALSE); gdk_window_get_size (GTK_WIDGET (menu)->window, &width, NULL); /* Update menu->requisition */ gtk_widget_size_request (GTK_WIDGET (menu), NULL); gtk_menu_set_tearoff_hints (menu, width); gtk_widget_realize (menu->tearoff_window); gtk_menu_position (menu); gtk_widget_show (GTK_WIDGET (menu)); gtk_widget_show (menu->tearoff_window); gtk_menu_scroll_to (menu, 0); } else { gtk_widget_hide (menu->tearoff_window); gtk_menu_reparent (menu, menu->toplevel, FALSE); } } } /** * gtk_menu_get_tearoff_state: * @menu: a #GtkMenu * * Returns whether the menu is torn off. See * gtk_menu_set_tearoff_state (). * * Return value: %TRUE if the menu is currently torn off. **/ gboolean gtk_menu_get_tearoff_state (GtkMenu *menu) { g_return_val_if_fail (GTK_IS_MENU (menu), FALSE); return menu->torn_off; } /** * gtk_menu_set_title: * @menu: a #GtkMenu * @title: a string containing the title for the menu. * * Sets the title string for the menu. The title is displayed when the menu * is shown as a tearoff menu. **/ void gtk_menu_set_title (GtkMenu *menu, const gchar *title) { g_return_if_fail (GTK_IS_MENU (menu)); if (title) g_object_set_data_full (G_OBJECT (menu), "gtk-menu-title", g_strdup (title), (GtkDestroyNotify) g_free); else g_object_set_data (G_OBJECT (menu), "gtk-menu-title", NULL); gtk_menu_update_title (menu); g_object_notify (G_OBJECT (menu), "tearoff_title"); } /** * gtk_menu_get_title: * @menu: a #GtkMenu * * Returns the title of the menu. See gtk_menu_set_title(). * * Return value: the title of the menu, or %NULL if the menu has no * title set on it. **/ G_CONST_RETURN gchar * gtk_menu_get_title (GtkMenu *menu) { g_return_val_if_fail (GTK_IS_MENU (menu), NULL); return gtk_object_get_data (GTK_OBJECT (menu), "gtk-menu-title"); } void gtk_menu_reorder_child (GtkMenu *menu, GtkWidget *child, gint position) { GtkMenuShell *menu_shell; g_return_if_fail (GTK_IS_MENU (menu)); g_return_if_fail (GTK_IS_MENU_ITEM (child)); menu_shell = GTK_MENU_SHELL (menu); if (g_list_find (menu_shell->children, child)) { menu_shell->children = g_list_remove (menu_shell->children, child); menu_shell->children = g_list_insert (menu_shell->children, child, position); if (GTK_WIDGET_VISIBLE (menu_shell)) gtk_widget_queue_resize (GTK_WIDGET (menu_shell)); } } static void gtk_menu_realize (GtkWidget *widget) { GdkWindowAttr attributes; gint attributes_mask; gint border_width; GtkMenu *menu; GtkWidget *child; GList *children; g_return_if_fail (GTK_IS_MENU (widget)); menu = GTK_MENU (widget); GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); attributes.window_type = GDK_WINDOW_CHILD; attributes.x = widget->allocation.x; attributes.y = widget->allocation.y; attributes.width = widget->allocation.width; attributes.height = widget->allocation.height; attributes.wclass = GDK_INPUT_OUTPUT; attributes.visual = gtk_widget_get_visual (widget); attributes.colormap = gtk_widget_get_colormap (widget); attributes.event_mask = gtk_widget_get_events (widget); attributes.event_mask |= (GDK_EXPOSURE_MASK | GDK_KEY_PRESS_MASK | GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK ); attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask); gdk_window_set_user_data (widget->window, widget); border_width = GTK_CONTAINER (widget)->border_width; attributes.x = border_width + widget->style->xthickness; attributes.y = border_width + widget->style->ythickness; attributes.width = MAX (1, widget->allocation.width - attributes.x * 2); attributes.height = MAX (1, widget->allocation.height - attributes.y * 2); if (menu->upper_arrow_visible) { attributes.y += MENU_SCROLL_ARROW_HEIGHT; attributes.height -= MENU_SCROLL_ARROW_HEIGHT; } if (menu->lower_arrow_visible) attributes.height -= MENU_SCROLL_ARROW_HEIGHT; menu->view_window = gdk_window_new (widget->window, &attributes, attributes_mask); gdk_window_set_user_data (menu->view_window, menu); attributes.x = 0; attributes.y = 0; attributes.height = MAX (1, widget->requisition.height - (border_width + widget->style->ythickness) * 2); menu->bin_window = gdk_window_new (menu->view_window, &attributes, attributes_mask); gdk_window_set_user_data (menu->bin_window, menu); children = GTK_MENU_SHELL (menu)->children; while (children) { child = children->data; children = children->next; gtk_widget_set_parent_window (child, menu->bin_window); } widget->style = gtk_style_attach (widget->style, widget->window); gtk_style_set_background (widget->style, menu->bin_window, GTK_STATE_NORMAL); gtk_style_set_background (widget->style, menu->view_window, GTK_STATE_NORMAL); gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL); if (GTK_MENU_SHELL (widget)->active_menu_item) gtk_menu_scroll_item_visible (GTK_MENU_SHELL (widget), GTK_MENU_SHELL (widget)->active_menu_item); gdk_window_show (menu->bin_window); gdk_window_show (menu->view_window); } /* See notes in gtk_menu_popup() for information about the "grab transfer window" */ static GdkWindow * menu_grab_transfer_window_get (GtkMenu *menu) { GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window"); if (!window) { GdkWindowAttr attributes; gint attributes_mask; attributes.x = -100; attributes.y = -100; attributes.width = 10; attributes.height = 10; attributes.window_type = GDK_WINDOW_TEMP; attributes.wclass = GDK_INPUT_ONLY; attributes.override_redirect = TRUE; attributes.event_mask = 0; attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR; window = gdk_window_new (gtk_widget_get_root_window (GTK_WIDGET (menu)), &attributes, attributes_mask); gdk_window_set_user_data (window, menu); gdk_window_show (window); g_object_set_data (G_OBJECT (menu), "gtk-menu-transfer-window", window); } return window; } static void menu_grab_transfer_window_destroy (GtkMenu *menu) { GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window"); if (window) { gdk_window_set_user_data (window, NULL); gdk_window_destroy (window); g_object_set_data (G_OBJECT (menu), "gtk-menu-transfer-window", NULL); } } static void gtk_menu_unrealize (GtkWidget *widget) { GtkMenu *menu; g_return_if_fail (GTK_IS_MENU (widget)); menu = GTK_MENU (widget); menu_grab_transfer_window_destroy (menu); gdk_window_set_user_data (menu->view_window, NULL); gdk_window_destroy (menu->view_window); menu->view_window = NULL; gdk_window_set_user_data (menu->bin_window, NULL); gdk_window_destroy (menu->bin_window); menu->bin_window = NULL; (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget); } static void gtk_menu_size_request (GtkWidget *widget, GtkRequisition *requisition) { GtkMenu *menu; GtkMenuShell *menu_shell; GtkWidget *child; GList *children; guint max_toggle_size; guint max_accel_width; GtkRequisition child_requisition; g_return_if_fail (GTK_IS_MENU (widget)); g_return_if_fail (requisition != NULL); menu = GTK_MENU (widget); menu_shell = GTK_MENU_SHELL (widget); requisition->width = 0; requisition->height = 0; max_toggle_size = 0; max_accel_width = 0; children = menu_shell->children; while (children) { child = children->data; children = children->next; if (GTK_WIDGET_VISIBLE (child)) { gint toggle_size; /* It's important to size_request the child * before doing the toggle size request, in * case the toggle size request depends on the size * request of a child of the child (e.g. for ImageMenuItem) */ GTK_MENU_ITEM (child)->show_submenu_indicator = TRUE; gtk_widget_size_request (child, &child_requisition); requisition->width = MAX (requisition->width, child_requisition.width); requisition->height += child_requisition.height; gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child), &toggle_size); max_toggle_size = MAX (max_toggle_size, toggle_size); max_accel_width = MAX (max_accel_width, GTK_MENU_ITEM (child)->accelerator_width); } } requisition->width += max_toggle_size + max_accel_width; requisition->width += (GTK_CONTAINER (menu)->border_width + widget->style->xthickness) * 2; requisition->height += (GTK_CONTAINER (menu)->border_width + widget->style->ythickness) * 2; menu->toggle_size = max_toggle_size; /* If the requested width was different than the allocated width, we need to change * the geometry hints for the tear off window so that the window can actually be resized. * Don't resize the tearoff if it is not active, because it won't redraw (it is only a background pixmap). */ if ((requisition->width != GTK_WIDGET (menu)->allocation.width) && menu->tearoff_active) gtk_menu_set_tearoff_hints (menu, requisition->width); } static void gtk_menu_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkMenu *menu; GtkMenuShell *menu_shell; GtkWidget *child; GtkAllocation child_allocation; GList *children; gint x, y; gint width, height; g_return_if_fail (GTK_IS_MENU (widget)); g_return_if_fail (allocation != NULL); menu = GTK_MENU (widget); menu_shell = GTK_MENU_SHELL (widget); widget->allocation = *allocation; x = GTK_CONTAINER (menu)->border_width + widget->style->xthickness; y = GTK_CONTAINER (menu)->border_width + widget->style->ythickness; width = MAX (1, allocation->width - x * 2); height = MAX (1, allocation->height - y * 2); if (menu->upper_arrow_visible && !menu->tearoff_active) { y += MENU_SCROLL_ARROW_HEIGHT; height -= MENU_SCROLL_ARROW_HEIGHT; } if (menu->lower_arrow_visible && !menu->tearoff_active) height -= MENU_SCROLL_ARROW_HEIGHT; if (GTK_WIDGET_REALIZED (widget)) { gdk_window_move_resize (widget->window, allocation->x, allocation->y, allocation->width, allocation->height); gdk_window_move_resize (menu->view_window, x, y, width, height); } if (menu_shell->children) { child_allocation.x = 0; child_allocation.y = 0; child_allocation.width = width; children = menu_shell->children; while (children) { child = children->data; children = children->next; if (GTK_WIDGET_VISIBLE (child)) { GtkRequisition child_requisition; gtk_widget_get_child_requisition (child, &child_requisition); child_allocation.height = child_requisition.height; gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child), menu->toggle_size); gtk_widget_size_allocate (child, &child_allocation); gtk_widget_queue_draw (child); child_allocation.y += child_allocation.height; } } /* Resize the item window */ if (GTK_WIDGET_REALIZED (widget)) { gdk_window_resize (menu->bin_window, child_allocation.width, child_allocation.y); } if (menu->tearoff_active) { if (allocation->height >= widget->requisition.height) { if (GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar)) { gtk_widget_hide (menu->tearoff_scrollbar); gtk_menu_set_tearoff_hints (menu, allocation->width); gtk_widget_set_usize (menu->tearoff_window, -1, allocation->height); gtk_menu_scroll_to (menu, 0); } } else { menu->tearoff_adjustment->upper = widget->requisition.height; menu->tearoff_adjustment->page_size = allocation->height; if (menu->tearoff_adjustment->value + menu->tearoff_adjustment->page_size > menu->tearoff_adjustment->upper) { gint value; value = menu->tearoff_adjustment->upper - menu->tearoff_adjustment->page_size; if (value < 0) value = 0; gtk_menu_scroll_to (menu, value); } gtk_adjustment_changed (menu->tearoff_adjustment); if (!GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar)) { gtk_widget_show (menu->tearoff_scrollbar); gtk_menu_set_tearoff_hints (menu, allocation->width); gtk_widget_set_usize (menu->tearoff_window, -1, allocation->height); } } } } } static void gtk_menu_paint (GtkWidget *widget, GdkEventExpose *event) { GtkMenu *menu; gint width, height; gint border_x, border_y; g_return_if_fail (GTK_IS_MENU (widget)); menu = GTK_MENU (widget); border_x = GTK_CONTAINER (widget)->border_width + widget->style->xthickness; border_y = GTK_CONTAINER (widget)->border_width + widget->style->ythickness; gdk_window_get_size (widget->window, &width, &height); if (event->window == widget->window) { gtk_paint_box (widget->style, widget->window, GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, widget, "menu", 0, 0, -1, -1); if (menu->upper_arrow_visible && !menu->tearoff_active) { gtk_paint_box (widget->style, widget->window, menu->upper_arrow_prelight ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, widget, "menu", border_x, border_y, width - 2*border_x, MENU_SCROLL_ARROW_HEIGHT); gtk_paint_arrow (widget->style, widget->window, menu->upper_arrow_prelight ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, widget, "menu", GTK_ARROW_UP, TRUE, width / 2 - MENU_SCROLL_ARROW_HEIGHT / 2 + 1, 2 * border_y + 1, MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2, MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2); } if (menu->lower_arrow_visible && !menu->tearoff_active) { gtk_paint_box (widget->style, widget->window, menu->lower_arrow_prelight ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, widget, "menu", border_x, height - border_y - MENU_SCROLL_ARROW_HEIGHT + 1, width - 2*border_x, MENU_SCROLL_ARROW_HEIGHT); gtk_paint_arrow (widget->style, widget->window, menu->lower_arrow_prelight ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, widget, "menu", GTK_ARROW_DOWN, TRUE, width / 2 - MENU_SCROLL_ARROW_HEIGHT / 2 + 1, height - MENU_SCROLL_ARROW_HEIGHT + 1, MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2, MENU_SCROLL_ARROW_HEIGHT - 2 * border_y - 2); } } else if (event->window == menu->view_window) { gint menu_height; gint top_pos; if (menu->scroll_offset < 0) gtk_paint_box (widget->style, menu->view_window, GTK_STATE_ACTIVE, GTK_SHADOW_IN, NULL, widget, "menu", 0, 0, -1, -menu->scroll_offset); menu_height = widget->requisition.height - 2*border_y; top_pos = height - 2*border_y - (menu->upper_arrow_visible ? MENU_SCROLL_ARROW_HEIGHT : 0); if (menu_height - menu->scroll_offset < top_pos) gtk_paint_box (widget->style, menu->view_window, GTK_STATE_ACTIVE, GTK_SHADOW_IN, NULL, widget, "menu", 0, menu_height - menu->scroll_offset, -1, top_pos - (menu_height - menu->scroll_offset)); } } static gboolean gtk_menu_expose (GtkWidget *widget, GdkEventExpose *event) { g_return_val_if_fail (GTK_IS_MENU (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); if (GTK_WIDGET_DRAWABLE (widget)) { gtk_menu_paint (widget, event); (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event); } return FALSE; } static void gtk_menu_show (GtkWidget *widget) { GtkMenu *menu = GTK_MENU (widget); _gtk_menu_refresh_accel_paths (menu, FALSE); GTK_WIDGET_CLASS (parent_class)->show (widget); } static gboolean gtk_menu_key_press (GtkWidget *widget, GdkEventKey *event) { GtkMenuShell *menu_shell; GtkMenu *menu; gboolean delete = FALSE; gboolean can_change_accels; gchar *accel = NULL; guint accel_key, accel_mods; GdkModifierType consumed_modifiers; GdkDisplay *display; g_return_val_if_fail (GTK_IS_MENU (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); menu_shell = GTK_MENU_SHELL (widget); menu = GTK_MENU (widget); gtk_menu_stop_navigating_submenu (menu); if (GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event)) return TRUE; display = gtk_widget_get_display (widget); g_object_get (G_OBJECT (gtk_widget_get_settings (widget)), "gtk-menu-bar-accel", &accel, "gtk-can-change-accels", &can_change_accels, NULL); if (accel) { guint keyval = 0; GdkModifierType mods = 0; gboolean handled = FALSE; gtk_accelerator_parse (accel, &keyval, &mods); if (keyval == 0) g_warning ("Failed to parse menu bar accelerator '%s'\n", accel); /* FIXME this is wrong, needs to be in the global accel resolution * thing, to properly consider i18n etc., but that probably requires * AccelGroup changes etc. */ if (event->keyval == keyval && (mods & event->state) == mods) { gtk_signal_emit_by_name (GTK_OBJECT (menu), "cancel"); } g_free (accel); if (handled) return TRUE; } switch (event->keyval) { case GDK_Delete: case GDK_KP_Delete: case GDK_BackSpace: delete = TRUE; break; default: break; } /* Figure out what modifiers went into determining the key symbol */ gdk_keymap_translate_keyboard_state (gdk_keymap_get_for_display (display), event->hardware_keycode, event->state, event->group, NULL, NULL, NULL, &consumed_modifiers); accel_key = gdk_keyval_to_lower (event->keyval); accel_mods = event->state & gtk_accelerator_get_default_mod_mask () & ~consumed_modifiers; /* If lowercasing affects the keysym, then we need to include SHIFT in the modifiers, * We re-upper case when we match against the keyval, but display and save in caseless form. */ if (accel_key != event->keyval) accel_mods |= GDK_SHIFT_MASK; /* Modify the accelerators */ if (can_change_accels && menu_shell->active_menu_item && GTK_BIN (menu_shell->active_menu_item)->child && /* no seperators */ GTK_MENU_ITEM (menu_shell->active_menu_item)->submenu == NULL && /* no submenus */ (delete || gtk_accelerator_valid (event->keyval, event->state))) { GtkWidget *menu_item = menu_shell->active_menu_item; gboolean locked, replace_accels = TRUE; const gchar *path; path = _gtk_widget_get_accel_path (menu_item, &locked); if (!path || locked) { /* can't change accelerators on menu_items without paths * (basically, those items are accelerator-locked). */ /* g_print("item has no path or is locked, menu prefix: %s\n", menu->accel_path); */ gdk_display_beep (display); } else { gboolean changed; /* For the keys that act to delete the current setting, we delete * the current setting if there is one, otherwise, we set the * key as the accelerator. */ if (delete) { GtkAccelKey key; if (gtk_accel_map_lookup_entry (path, &key) && (key.accel_key || key.accel_mods)) { accel_key = 0; accel_mods = 0; } } changed = gtk_accel_map_change_entry (path, accel_key, accel_mods, replace_accels); if (!changed) { /* we failed, probably because this key is in use and * locked already */ /* g_print("failed to change\n"); */ gdk_display_beep (display); } } } return TRUE; } static gboolean gtk_menu_motion_notify (GtkWidget *widget, GdkEventMotion *event) { GtkWidget *menu_item; GtkMenu *menu; GtkMenuShell *menu_shell; gboolean need_enter; if (GTK_IS_MENU (widget)) gtk_menu_handle_scrolling (GTK_MENU (widget), TRUE); /* We received the event for one of two reasons: * * a) We are the active menu, and did gtk_grab_add() * b) The widget is a child of ours, and the event was propagated * * Since for computation of navigation regions, we want the menu which * is the parent of the menu item, for a), we need to find that menu, * which may be different from 'widget'. */ menu_item = gtk_get_event_widget ((GdkEvent*) event); if (!menu_item || !GTK_IS_MENU_ITEM (menu_item) || !_gtk_menu_item_is_selectable (menu_item) || !GTK_IS_MENU (menu_item->parent)) return FALSE; menu_shell = GTK_MENU_SHELL (menu_item->parent); menu = GTK_MENU (menu_shell); need_enter = (menu->navigation_region != NULL || menu_shell->ignore_enter); /* Check to see if we are within an active submenu's navigation region */ if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root)) return TRUE; if (need_enter) { /* The menu is now sensitive to enter events on its items, but * was previously sensitive. So we fake an enter event. */ gint width, height; menu_shell->ignore_enter = FALSE; gdk_window_get_size (event->window, &width, &height); if (event->x >= 0 && event->x < width && event->y >= 0 && event->y < height) { GdkEvent send_event; memset (&send_event, 0, sizeof (send_event)); send_event.crossing.type = GDK_ENTER_NOTIFY; send_event.crossing.window = event->window; send_event.crossing.time = event->time; send_event.crossing.send_event = TRUE; send_event.crossing.x_root = event->x_root; send_event.crossing.y_root = event->y_root; send_event.crossing.x = event->x; send_event.crossing.y = event->y; /* We send the event to 'widget', the currently active menu, * instead of 'menu', the menu that the pointer is in. This * will ensure that the event will be ignored unless the * menuitem is a child of the active menu or some parent * menu of the active menu. */ return gtk_widget_event (widget, &send_event); } } return FALSE; } static gboolean gtk_menu_scroll_timeout (gpointer data) { GtkMenu *menu; GtkWidget *widget; gint offset; gint view_width, view_height; GDK_THREADS_ENTER (); menu = GTK_MENU (data); widget = GTK_WIDGET (menu); offset = menu->scroll_offset + menu->scroll_step; /* If we scroll upward and the non-visible top part * is smaller than the scroll arrow it would be * pretty stupid to show the arrow and taking more * screen space than just scrolling to the top. */ if ((menu->scroll_step < 0) && (offset < MENU_SCROLL_ARROW_HEIGHT)) offset = 0; /* Don't scroll over the top if we weren't before: */ if ((menu->scroll_offset >= 0) && (offset < 0)) offset = 0; gdk_window_get_size (widget->window, &view_width, &view_height); /* Don't scroll past the bottom if we weren't before: */ if (menu->scroll_offset > 0) view_height -= MENU_SCROLL_ARROW_HEIGHT; if ((menu->scroll_offset + view_height <= widget->requisition.height) && (offset + view_height > widget->requisition.height)) offset = widget->requisition.height - view_height; gtk_menu_scroll_to (menu, offset); GDK_THREADS_LEAVE (); return TRUE; } static void gtk_menu_handle_scrolling (GtkMenu *menu, gboolean enter) { GtkMenuShell *menu_shell; gint width, height; gint x, y; gint border; GdkRectangle rect; gboolean in_arrow; gboolean scroll_fast = FALSE; menu_shell = GTK_MENU_SHELL (menu); gdk_window_get_pointer (GTK_WIDGET (menu)->window, &x, &y, NULL); gdk_window_get_size (GTK_WIDGET (menu)->window, &width, &height); border = GTK_CONTAINER (menu)->border_width + GTK_WIDGET (menu)->style->ythickness; if (menu->upper_arrow_visible && !menu->tearoff_active) { rect.x = 0; rect.y = 0; rect.width = width; rect.height = MENU_SCROLL_ARROW_HEIGHT + border; in_arrow = FALSE; if ((x >= rect.x) && (x < rect.x + rect.width) && (y >= rect.y) && (y < rect.y + rect.height)) { in_arrow = TRUE; scroll_fast = (y < rect.y + MENU_SCROLL_FAST_ZONE); } if (enter && in_arrow && (!menu->upper_arrow_prelight || menu->scroll_fast != scroll_fast)) { menu->upper_arrow_prelight = TRUE; menu->scroll_fast = scroll_fast; gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE); /* Deselect the active item so that any submenus are poped down */ gtk_menu_shell_deselect (menu_shell); gtk_menu_stop_scrolling (menu); menu->scroll_step = -MENU_SCROLL_STEP; menu->timeout_id = g_timeout_add ((scroll_fast) ? MENU_SCROLL_TIMEOUT2 : MENU_SCROLL_TIMEOUT1, gtk_menu_scroll_timeout, menu); } else if (!enter && !in_arrow && menu->upper_arrow_prelight) { menu->upper_arrow_prelight = FALSE; gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE); gtk_menu_stop_scrolling (menu); } } if (menu->lower_arrow_visible && !menu->tearoff_active) { rect.x = 0; rect.y = height - border - MENU_SCROLL_ARROW_HEIGHT; rect.width = width; rect.height = MENU_SCROLL_ARROW_HEIGHT + border; in_arrow = FALSE; if ((x >= rect.x) && (x < rect.x + rect.width) && (y >= rect.y) && (y < rect.y + rect.height)) { in_arrow = TRUE; scroll_fast = (y > rect.y + rect.height - MENU_SCROLL_FAST_ZONE); } if (enter && in_arrow && (!menu->lower_arrow_prelight || menu->scroll_fast != scroll_fast)) { menu->lower_arrow_prelight = TRUE; menu->scroll_fast = scroll_fast; gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE); /* Deselect the active item so that any submenus are poped down */ gtk_menu_shell_deselect (menu_shell); gtk_menu_stop_scrolling (menu); menu->scroll_step = MENU_SCROLL_STEP; menu->timeout_id = g_timeout_add ((scroll_fast) ? MENU_SCROLL_TIMEOUT2 : MENU_SCROLL_TIMEOUT1, gtk_menu_scroll_timeout, menu); } else if (!enter && !in_arrow && menu->lower_arrow_prelight) { menu->lower_arrow_prelight = FALSE; gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE); gtk_menu_stop_scrolling (menu); } } } static gboolean gtk_menu_enter_notify (GtkWidget *widget, GdkEventCrossing *event) { GtkWidget *menu_item; if (widget && GTK_IS_MENU (widget)) gtk_menu_handle_scrolling (GTK_MENU (widget), TRUE); /* If this is a faked enter (see gtk_menu_motion_notify), 'widget' * will not correspond to the event widget's parent. Check to see * if we are in the parent's navigation region. */ menu_item = gtk_get_event_widget ((GdkEvent*) event); if (menu_item && GTK_IS_MENU_ITEM (menu_item) && GTK_IS_MENU (menu_item->parent) && gtk_menu_navigating_submenu (GTK_MENU (menu_item->parent), event->x_root, event->y_root)) return TRUE; return GTK_WIDGET_CLASS (parent_class)->enter_notify_event (widget, event); } static gboolean gtk_menu_leave_notify (GtkWidget *widget, GdkEventCrossing *event) { GtkMenuShell *menu_shell; GtkMenu *menu; GtkMenuItem *menu_item; GtkWidget *event_widget; menu = GTK_MENU (widget); menu_shell = GTK_MENU_SHELL (widget); if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root)) return TRUE; gtk_menu_handle_scrolling (menu, FALSE); event_widget = gtk_get_event_widget ((GdkEvent*) event); if (!event_widget || !GTK_IS_MENU_ITEM (event_widget)) return TRUE; menu_item = GTK_MENU_ITEM (event_widget); /* Here we check to see if we're leaving an active menu item with a submenu, * in which case we enter submenu navigation mode. */ if (menu_shell->active_menu_item != NULL && menu_item->submenu != NULL && menu_item->submenu_placement == GTK_LEFT_RIGHT) { if (GTK_MENU_SHELL (menu_item->submenu)->active) { gtk_menu_set_submenu_navigation_region (menu, menu_item, event); return TRUE; } } return GTK_WIDGET_CLASS (parent_class)->leave_notify_event (widget, event); } static void gtk_menu_stop_navigating_submenu (GtkMenu *menu) { if (menu->navigation_region) { gdk_region_destroy (menu->navigation_region); menu->navigation_region = NULL; } if (menu->navigation_timeout) { gtk_timeout_remove (menu->navigation_timeout); menu->navigation_timeout = 0; } } /* When the timeout is elapsed, the navigation region is destroyed * and the menuitem under the pointer (if any) is selected. */ static gboolean gtk_menu_stop_navigating_submenu_cb (gpointer user_data) { GtkMenu *menu = user_data; GdkWindow *child_window; GDK_THREADS_ENTER (); gtk_menu_stop_navigating_submenu (menu); if (GTK_WIDGET_REALIZED (menu)) { child_window = gdk_window_get_pointer (menu->bin_window, NULL, NULL, NULL); if (child_window) { GdkEventCrossing send_event; memset (&send_event, 0, sizeof (send_event)); send_event.window = child_window; send_event.type = GDK_ENTER_NOTIFY; send_event.time = GDK_CURRENT_TIME; /* Bogus */ send_event.send_event = TRUE; GTK_WIDGET_CLASS (parent_class)->enter_notify_event (GTK_WIDGET (menu), &send_event); } } GDK_THREADS_LEAVE (); return FALSE; } static gboolean gtk_menu_navigating_submenu (GtkMenu *menu, gint event_x, gint event_y) { if (menu->navigation_region) { if (gdk_region_point_in (menu->navigation_region, event_x, event_y)) return TRUE; else { gtk_menu_stop_navigating_submenu (menu); return FALSE; } } return FALSE; } static void gtk_menu_set_submenu_navigation_region (GtkMenu *menu, GtkMenuItem *menu_item, GdkEventCrossing *event) { gint submenu_left = 0; gint submenu_right = 0; gint submenu_top = 0; gint submenu_bottom = 0; gint width = 0; gint height = 0; GdkPoint point[3]; GtkWidget *event_widget; g_return_if_fail (menu_item->submenu != NULL); g_return_if_fail (event != NULL); event_widget = gtk_get_event_widget ((GdkEvent*) event); gdk_window_get_origin (menu_item->submenu->window, &submenu_left, &submenu_top); gdk_window_get_size (menu_item->submenu->window, &width, &height); submenu_right = submenu_left + width; submenu_bottom = submenu_top + height; gdk_window_get_size (event_widget->window, &width, &height); if (event->x >= 0 && event->x < width) { /* Set navigation region */ /* We fudge/give a little padding in case the user * ``misses the vertex'' of the triangle/is off by a pixel or two. */ if (menu_item->submenu_direction == GTK_DIRECTION_RIGHT) point[0].x = event->x_root - SUBMENU_NAV_REGION_PADDING; else point[0].x = event->x_root + SUBMENU_NAV_REGION_PADDING; /* Exiting the top or bottom? */ if (event->y < 0) { /* top */ point[0].y = event->y_root + 1; point[1].y = submenu_top; if (point[0].y <= point[1].y) return; } else { /* bottom */ point[0].y = event->y_root; point[1].y = submenu_bottom; if (point[0].y >= point[1].y) return; } /* Submenu is to the left or right? */ if (menu_item->submenu_direction == GTK_DIRECTION_RIGHT) point[1].x = submenu_left; /* right */ else point[1].x = submenu_right; /* left */ point[2].x = point[1].x; point[2].y = point[0].y; gtk_menu_stop_navigating_submenu (menu); menu->navigation_region = gdk_region_polygon (point, 3, GDK_WINDING_RULE); menu->navigation_timeout = gtk_timeout_add (SUBMENU_NAV_HYSTERESIS_TIMEOUT, gtk_menu_stop_navigating_submenu_cb, menu); } } static void gtk_menu_deactivate (GtkMenuShell *menu_shell) { GtkWidget *parent; g_return_if_fail (GTK_IS_MENU (menu_shell)); parent = menu_shell->parent_menu_shell; menu_shell->activate_time = 0; gtk_menu_popdown (GTK_MENU (menu_shell)); if (parent) gtk_menu_shell_deactivate (GTK_MENU_SHELL (parent)); } static void gtk_menu_position (GtkMenu *menu) { GtkWidget *widget; GtkRequisition requisition; gint x, y; gint scroll_offset; gint menu_height; gboolean push_in; GdkScreen *screen; GdkRectangle *monitor; gint monitor_num; g_return_if_fail (GTK_IS_MENU (menu)); widget = GTK_WIDGET (menu); gdk_window_get_pointer (gtk_widget_get_root_window (widget), &x, &y, NULL); screen = gtk_widget_get_screen (widget); monitor_num = gdk_screen_get_monitor_at_point (screen, x, y); monitor = gdk_screen_get_monitor_geometry (screen, monitor_num); /* We need the requisition to figure out the right place to * popup the menu. In fact, we always need to ask here, since * if a size_request was queued while we weren't popped up, * the requisition won't have been recomputed yet. */ gtk_widget_size_request (widget, &requisition); push_in = FALSE; if (menu->position_func) (* menu->position_func) (menu, &x, &y, &push_in, menu->position_func_data); else { x = CLAMP (x - 2, monitor->x, MAX (monitor->x, monitor->x + monitor->width - requisition.width)); y = CLAMP (y - 2, monitor->y, MAX (monitor->y, monitor->y + monitor->height - requisition.height)); } scroll_offset = 0; if (push_in) { menu_height = GTK_WIDGET (menu)->requisition.height; if (y + menu_height > monitor->y + monitor->height) { scroll_offset -= y + menu_height - (monitor->y + monitor->height); y = (monitor->y + monitor->height) - menu_height; } if (y < monitor->y) { scroll_offset -= y; y = monitor->y; } } /* FIXME: should this be done in the various position_funcs ? */ x = CLAMP (x, monitor->x, MAX (monitor->x, monitor->x + monitor->width - requisition.width)); if (y + requisition.height > monitor->y + monitor->height) requisition.height = (monitor->y + monitor->height) - y; if (y < monitor->y) { scroll_offset -= y; requisition.height -= -y; y = monitor->y; } if (scroll_offset > 0) scroll_offset += MENU_SCROLL_ARROW_HEIGHT; gtk_window_move (GTK_WINDOW (GTK_MENU_SHELL (menu)->active ? menu->toplevel : menu->tearoff_window), x, y); gtk_widget_set_usize (GTK_MENU_SHELL (menu)->active ? menu->toplevel : menu->tearoff_hbox, -1, requisition.height); menu->scroll_offset = scroll_offset; } static void gtk_menu_stop_scrolling (GtkMenu *menu) { if (menu->timeout_id) { g_source_remove (menu->timeout_id); menu->timeout_id = 0; } } static void gtk_menu_scroll_to (GtkMenu *menu, gint offset) { GtkWidget *widget; gint x, y; gint view_width, view_height; gint border_width; gboolean last_visible; gint menu_height; widget = GTK_WIDGET (menu); if (menu->tearoff_active && menu->tearoff_adjustment && (menu->tearoff_adjustment->value != offset)) { menu->tearoff_adjustment->value = offset; gtk_adjustment_value_changed (menu->tearoff_adjustment); } /* Scroll the menu: */ gdk_window_move (menu->bin_window, 0, -offset); /* Move/resize the viewport according to arrows: */ gdk_window_get_size (widget->window, &view_width, &view_height); border_width = GTK_CONTAINER (menu)->border_width; view_width -= (border_width + widget->style->xthickness) * 2; view_height -= (border_width + widget->style->ythickness) * 2; menu_height = widget->requisition.height - (border_width + widget->style->ythickness) * 2; x = border_width + widget->style->xthickness; y = border_width + widget->style->ythickness; if (!menu->tearoff_active) { last_visible = menu->upper_arrow_visible; menu->upper_arrow_visible = (offset > 0); if (menu->upper_arrow_visible) view_height -= MENU_SCROLL_ARROW_HEIGHT; if ( (last_visible != menu->upper_arrow_visible) && !menu->upper_arrow_visible) { menu->upper_arrow_prelight = FALSE; /* If we hid the upper arrow, possibly remove timeout */ if (menu->scroll_step < 0) gtk_menu_stop_scrolling (menu); } last_visible = menu->lower_arrow_visible; menu->lower_arrow_visible = (view_height + offset < menu_height); if (menu->lower_arrow_visible) view_height -= MENU_SCROLL_ARROW_HEIGHT; if ( (last_visible != menu->lower_arrow_visible) && !menu->lower_arrow_visible) { menu->lower_arrow_prelight = FALSE; /* If we hid the lower arrow, possibly remove timeout */ if (menu->scroll_step > 0) gtk_menu_stop_scrolling (menu); } if (menu->upper_arrow_visible) y += MENU_SCROLL_ARROW_HEIGHT; } gdk_window_move_resize (menu->view_window, x, y, view_width, view_height); menu->scroll_offset = offset; } static void gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell, GtkWidget *menu_item) { GtkMenu *menu; GtkWidget *child; GList *children; GtkRequisition child_requisition; gint child_offset, child_height; gint width, height; gint y; gint arrow_height; gboolean last_child = 0; menu = GTK_MENU (menu_shell); /* We need to check if the selected item fully visible. * If not we need to scroll the menu so that it becomes fully * visible. */ child = NULL; child_offset = 0; child_height = 0; children = menu_shell->children; while (children) { child = children->data; children = children->next; if (GTK_WIDGET_VISIBLE (child)) { gtk_widget_size_request (child, &child_requisition); child_offset += child_height; child_height = child_requisition.height; } if (child == menu_item) { last_child = (children == NULL); break; } } if (child == menu_item) { y = menu->scroll_offset; gdk_window_get_size (GTK_WIDGET (menu)->window, &width, &height); height -= 2*GTK_CONTAINER (menu)->border_width + 2*GTK_WIDGET (menu)->style->ythickness; if (child_offset + child_height <= y) { /* Ignore the enter event we might get if the pointer is on the menu */ menu_shell->ignore_enter = TRUE; gtk_menu_scroll_to (menu, child_offset); } else { arrow_height = 0; if (menu->upper_arrow_visible && !menu->tearoff_active) arrow_height += MENU_SCROLL_ARROW_HEIGHT; if (menu->lower_arrow_visible && !menu->tearoff_active) arrow_height += MENU_SCROLL_ARROW_HEIGHT; if (child_offset >= y + height - arrow_height) { arrow_height = 0; if (!last_child && !menu->tearoff_active) arrow_height += MENU_SCROLL_ARROW_HEIGHT; y = child_offset + child_height - height + arrow_height; if ((y > 0) && !menu->tearoff_active) { /* Need upper arrow */ arrow_height += MENU_SCROLL_ARROW_HEIGHT; y = child_offset + child_height - height + arrow_height; } /* Ignore the enter event we might get if the pointer is on the menu */ menu_shell->ignore_enter = TRUE; gtk_menu_scroll_to (menu, y); } } } } static void gtk_menu_select_item (GtkMenuShell *menu_shell, GtkWidget *menu_item) { GtkMenu *menu = GTK_MENU (menu_shell); if (GTK_WIDGET_REALIZED (GTK_WIDGET (menu))) gtk_menu_scroll_item_visible (menu_shell, menu_item); GTK_MENU_SHELL_CLASS (parent_class)->select_item (menu_shell, menu_item); } /* Reparent the menu, taking care of the refcounting * * If unrealize is true we force a unrealize while reparenting the parent. * This can help eliminate flicker in some cases. * * What happens is that when the menu is unrealized and then re-realized, * the allocations are as follows: * * parent - 1x1 at (0,0) * child1 - 100x20 at (0,0) * child2 - 100x20 at (0,20) * child3 - 100x20 at (0,40) * * That is, the parent is small but the children are full sized. Then, * when the queued_resize gets processed, the parent gets resized to * full size. * * But in order to eliminate flicker when scrolling, gdkgeometry-x11.c * contains the following logic: * * - if a move or resize operation on a window would change the clip * region on the children, then before the window is resized * the background for children is temporarily set to None, the * move/resize done, and the background for the children restored. * * So, at the point where the parent is resized to final size, the * background for the children is temporarily None, and thus they * are not cleared to the background color and the previous background * (the image of the menu) is left in place. */ static void gtk_menu_reparent (GtkMenu *menu, GtkWidget *new_parent, gboolean unrealize) { GtkObject *object = GTK_OBJECT (menu); GtkWidget *widget = GTK_WIDGET (menu); gboolean was_floating = GTK_OBJECT_FLOATING (object); gtk_object_ref (object); gtk_object_sink (object); if (unrealize) { gtk_object_ref (object); gtk_container_remove (GTK_CONTAINER (widget->parent), widget); gtk_container_add (GTK_CONTAINER (new_parent), widget); gtk_object_unref (object); } else gtk_widget_reparent (GTK_WIDGET (menu), new_parent); if (was_floating) GTK_OBJECT_SET_FLAGS (object, GTK_FLOATING); else gtk_object_unref (object); } static void gtk_menu_show_all (GtkWidget *widget) { g_return_if_fail (GTK_IS_MENU (widget)); /* Show children, but not self. */ gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_show_all, NULL); } static void gtk_menu_hide_all (GtkWidget *widget) { g_return_if_fail (GTK_IS_MENU (widget)); /* Hide children, but not self. */ gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_hide_all, NULL); } /** * gtk_menu_set_screen: * @menu: a #GtkMenu. * @screen: a #GtkScreen. * * Sets the #GtkScreen on which the GtkMenu will be displayed. * This function can only be called before @menu is realized. **/ void gtk_menu_set_screen (GtkMenu *menu, GdkScreen *screen) { g_return_if_fail (GTK_IS_MENU (menu)); gtk_window_set_screen (GTK_WINDOW (menu->toplevel), screen); g_object_set_data (G_OBJECT (menu), "gtk-menu-explicit-screen", screen); }