1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 // This class replicates some menubar behaviors that are tricky to get right.
6 // It is used to create a more native feel for the bookmark bar.
8 #ifndef CHROME_BROWSER_UI_GTK_MENU_BAR_HELPER_H_
9 #define CHROME_BROWSER_UI_GTK_MENU_BAR_HELPER_H_
15 #include "base/memory/scoped_ptr.h"
16 #include "ui/base/gtk/gtk_signal.h"
19 class GtkSignalRegistrar;
26 virtual ~Delegate() {}
28 // Called when a the menu for a button ought to be triggered.
29 virtual void PopupForButton(GtkWidget* button) = 0;
30 virtual void PopupForButtonNextTo(GtkWidget* button,
31 GtkMenuDirectionType dir) = 0;
34 // |delegate| cannot be null.
35 explicit MenuBarHelper(Delegate* delegate);
38 // Must be called whenever a button's menu starts showing. It triggers the
39 // MenuBarHelper to start listening for certain events.
40 void MenuStartedShowing(GtkWidget* button, GtkWidget* menu);
42 // Add |button| to the set of buttons we care about.
43 void Add(GtkWidget* button);
45 // Remove |button| from the set of buttons we care about.
46 void Remove(GtkWidget* button);
48 // Clear all buttons from the set.
52 CHROMEGTK_CALLBACK_0(MenuBarHelper, void, OnMenuHiddenOrDestroyed);
53 CHROMEGTK_CALLBACK_1(MenuBarHelper, gboolean, OnMenuMotionNotify,
55 CHROMEGTK_CALLBACK_1(MenuBarHelper, void, OnMenuMoveCurrent,
56 GtkMenuDirectionType);
58 // The buttons for which we pop up menus. We do not own these, or even add
60 std::vector<GtkWidget*> buttons_;
62 // The button that is currently showing a menu, or NULL.
63 GtkWidget* button_showing_menu_;
65 // The highest level menu that is currently showing, or NULL.
66 GtkWidget* showing_menu_;
68 // All the submenus of |showing_menu_|. We connect to motion events on all
70 std::vector<GtkWidget*> submenus_;
72 // Signal handlers that are attached only between the "show" and "hide" events
74 scoped_ptr<ui::GtkSignalRegistrar> signal_handlers_;
79 #endif // CHROME_BROWSER_UI_GTK_MENU_BAR_HELPER_H_