150 lines
5.4 KiB
C++
150 lines
5.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "browser/ui/gtk/gtk_custom_menu.h"
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#include "browser/ui/gtk/gtk_custom_menu_item.h"
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G_DEFINE_TYPE(GtkCustomMenu, gtk_custom_menu, GTK_TYPE_MENU)
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// Stolen directly from gtkmenushell.c. I'd love to call the library version
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// instead, but it's static and isn't exported. :(
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static gint gtk_menu_shell_is_item(GtkMenuShell* menu_shell,
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GtkWidget* child) {
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GtkWidget *parent;
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g_return_val_if_fail(GTK_IS_MENU_SHELL(menu_shell), FALSE);
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g_return_val_if_fail(child != NULL, FALSE);
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parent = gtk_widget_get_parent(child);
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while (GTK_IS_MENU_SHELL(parent)) {
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if (parent == reinterpret_cast<GtkWidget*>(menu_shell))
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return TRUE;
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parent = GTK_MENU_SHELL(parent)->parent_menu_shell;
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}
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return FALSE;
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}
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// Stolen directly from gtkmenushell.c. I'd love to call the library version
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// instead, but it's static and isn't exported. :(
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static GtkWidget* gtk_menu_shell_get_item(GtkMenuShell* menu_shell,
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GdkEvent* event) {
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GtkWidget* menu_item = gtk_get_event_widget(event);
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while (menu_item && !GTK_IS_MENU_ITEM(menu_item))
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menu_item = gtk_widget_get_parent(menu_item);
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if (menu_item && gtk_menu_shell_is_item(menu_shell, menu_item))
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return menu_item;
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else
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return NULL;
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}
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// When processing a button event, abort processing if the cursor isn't in a
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// clickable region.
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static gboolean gtk_custom_menu_button_press(GtkWidget* widget,
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GdkEventButton* event) {
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GtkWidget* menu_item = gtk_menu_shell_get_item(
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GTK_MENU_SHELL(widget), reinterpret_cast<GdkEvent*>(event));
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if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
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if (!gtk_custom_menu_item_is_in_clickable_region(
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GTK_CUSTOM_MENU_ITEM(menu_item))) {
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return TRUE;
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}
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}
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return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
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button_press_event(widget, event);
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}
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// When processing a button event, abort processing if the cursor isn't in a
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// clickable region. If it's in a button that doesn't dismiss the menu, fire
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// that event and abort having the normal GtkMenu code run.
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static gboolean gtk_custom_menu_button_release(GtkWidget* widget,
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GdkEventButton* event) {
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GtkWidget* menu_item = gtk_menu_shell_get_item(
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GTK_MENU_SHELL(widget), reinterpret_cast<GdkEvent*>(event));
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if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
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if (!gtk_custom_menu_item_is_in_clickable_region(
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GTK_CUSTOM_MENU_ITEM(menu_item))) {
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// Stop processing this event. This isn't a clickable region.
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return TRUE;
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}
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if (gtk_custom_menu_item_try_no_dismiss_command(
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GTK_CUSTOM_MENU_ITEM(menu_item))) {
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return TRUE;
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}
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}
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return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
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button_release_event(widget, event);
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}
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// Manually forward button press events to the menu item (and then do what we'd
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// do normally).
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static gboolean gtk_custom_menu_motion_notify(GtkWidget* widget,
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GdkEventMotion* event) {
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GtkWidget* menu_item = gtk_menu_shell_get_item(
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GTK_MENU_SHELL(widget), (GdkEvent*)event);
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if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
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gtk_custom_menu_item_receive_motion_event(GTK_CUSTOM_MENU_ITEM(menu_item),
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event->x, event->y);
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}
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return GTK_WIDGET_CLASS(gtk_custom_menu_parent_class)->
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motion_notify_event(widget, event);
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}
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static void gtk_custom_menu_move_current(GtkMenuShell* menu_shell,
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GtkMenuDirectionType direction) {
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// If the currently selected item is custom, we give it first chance to catch
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// up/down events.
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// TODO(erg): We are breaking a GSEAL by directly accessing this. We'll need
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// to fix this by the time gtk3 comes out.
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GtkWidget* menu_item = GTK_MENU_SHELL(menu_shell)->active_menu_item;
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if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
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switch (direction) {
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case GTK_MENU_DIR_PREV:
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case GTK_MENU_DIR_NEXT:
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if (gtk_custom_menu_item_handle_move(GTK_CUSTOM_MENU_ITEM(menu_item),
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direction))
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return;
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break;
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default:
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break;
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}
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}
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GTK_MENU_SHELL_CLASS(gtk_custom_menu_parent_class)->
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move_current(menu_shell, direction);
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// In the case of hitting PREV and transitioning to a custom menu, we want to
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// make sure we're selecting the final item in the list, not the first one.
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menu_item = GTK_MENU_SHELL(menu_shell)->active_menu_item;
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if (GTK_IS_CUSTOM_MENU_ITEM(menu_item)) {
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gtk_custom_menu_item_select_item_by_direction(
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GTK_CUSTOM_MENU_ITEM(menu_item), direction);
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}
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}
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static void gtk_custom_menu_init(GtkCustomMenu* menu) {
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}
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static void gtk_custom_menu_class_init(GtkCustomMenuClass* klass) {
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GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass);
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GtkMenuShellClass* menu_shell_class = GTK_MENU_SHELL_CLASS(klass);
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widget_class->button_press_event = gtk_custom_menu_button_press;
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widget_class->button_release_event = gtk_custom_menu_button_release;
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widget_class->motion_notify_event = gtk_custom_menu_motion_notify;
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menu_shell_class->move_current = gtk_custom_menu_move_current;
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}
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GtkWidget* gtk_custom_menu_new() {
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return GTK_WIDGET(g_object_new(GTK_TYPE_CUSTOM_MENU, NULL));
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}
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