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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef VIEWS_CONTROLS_MENU_MENU_2_H_
#define VIEWS_CONTROLS_MENU_MENU_2_H_
#include "app/menus/menu_model.h"
#include "base/scoped_ptr.h"
#include "views/controls/menu/menu_wrapper.h"
namespace gfx {
class Point;
}
namespace views {
class NativeMenuGtk;
class View;
// A menu. Populated from a model, and relies on a delegate to execute commands.
//
// WARNING: do NOT create and use Menu2 on the stack. Menu2 notifies the model
// of selection AFTER a delay. This means that if use a Menu2 on the stack
// ActivatedAt is never invoked.
class Menu2 {
public:
// Creates a new menu populated with the contents of |model|.
// WARNING: this populates the menu on construction by invoking methods on
// the model. As such, it is typically not safe to use this as the model
// from the constructor. EG:
// MyClass : menu_(this) {}
// is likely to have problems.
explicit Menu2(menus::MenuModel* model);
virtual ~Menu2() {}
// How the menu is aligned relative to the point it is shown at.
// The alignment is reversed by menu if text direction is right to left.
enum Alignment {
ALIGN_TOPLEFT,
ALIGN_TOPRIGHT
};
// Runs the menu at the specified point. This method blocks until done.
// RunContextMenuAt is the same, but the alignment is the default for a
// context menu.
void RunMenuAt(const gfx::Point& point, Alignment alignment);
void RunContextMenuAt(const gfx::Point& point);
// Cancels the active menu.
void CancelMenu();
// Called when the model supplying data to this menu has changed, and the menu
// must be rebuilt.
void Rebuild();
// Called when the states of the menu items in the menu should be refreshed
// from the model.
void UpdateStates();
// For submenus.
gfx::NativeMenu GetNativeMenu() const;
// Get the result of the last call to RunMenuAt to determine whether an
// item was selected, the user navigated to a next or previous menu, or
// nothing.
MenuWrapper::MenuAction GetMenuAction() const;
// Add a listener to receive a callback when the menu opens.
void AddMenuListener(MenuListener* listener);
// Remove a menu listener.
void RemoveMenuListener(MenuListener* listener);
// Accessors.
menus::MenuModel* model() const { return model_; }
private:
friend class NativeMenuGtk;
menus::MenuModel* model_;
// The object that actually implements the menu.
scoped_ptr<MenuWrapper> wrapper_;
DISALLOW_COPY_AND_ASSIGN(Menu2);
};
} // namespace views
#endif // VIEWS_CONTROLS_MENU_MENU_2_H_
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