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// Copyright (c) 2011 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_MODEL_ADAPTER_H_
#define VIEWS_CONTROLS_MENU_MENU_MODEL_ADAPTER_H_
#pragma once
#include <map>
#include "views/controls/menu/menu_delegate.h"
namespace ui {
class MenuModel;
}
namespace views {
class MenuItemView;
// This class wraps an instance of ui::MenuModel with the
// views::MenuDelegate interface required by views::MenuItemView.
class VIEWS_EXPORT MenuModelAdapter : public MenuDelegate {
public:
// The caller retains ownership of the ui::MenuModel instance and
// must ensure it exists for the lifetime of the adapter.
explicit MenuModelAdapter(ui::MenuModel* menu_model);
virtual ~MenuModelAdapter();
// Populate a MenuItemView menu with the ui::MenuModel items
// (including submenus).
virtual void BuildMenu(MenuItemView* menu);
// Convenience for creating and populating a menu. The caller owns the
// returned MenuItemView.
MenuItemView* CreateMenu();
void set_triggerable_event_flags(int triggerable_event_flags) {
triggerable_event_flags_ = triggerable_event_flags;
}
int triggerable_event_flags() const { return triggerable_event_flags_; }
protected:
// views::MenuDelegate implementation.
virtual void ExecuteCommand(int id) OVERRIDE;
virtual void ExecuteCommand(int id, int mouse_event_flags) OVERRIDE;
virtual bool IsTriggerableEvent(MenuItemView* source,
const MouseEvent& e) OVERRIDE;
virtual bool GetAccelerator(int id,
ui::Accelerator* accelerator) OVERRIDE;
virtual string16 GetLabel(int id) const OVERRIDE;
virtual const gfx::Font& GetLabelFont(int id) const OVERRIDE;
virtual bool IsCommandEnabled(int id) const OVERRIDE;
virtual bool IsItemChecked(int id) const OVERRIDE;
virtual void SelectionChanged(MenuItemView* menu) OVERRIDE;
virtual void WillShowMenu(MenuItemView* menu) OVERRIDE;
virtual void WillHideMenu(MenuItemView* menu) OVERRIDE;
private:
// Implementation of BuildMenu(). index_offset is both input and output;
// on input it contains the offset from index to command id for the model,
// and on output it contains the offset for the next model.
void BuildMenuImpl(MenuItemView* menu, ui::MenuModel* model);
// Container of ui::MenuModel pointers as encountered by preorder
// traversal. The first element is always the top-level model
// passed to the constructor.
ui::MenuModel* menu_model_;
// Mouse event flags which can trigger menu actions.
int triggerable_event_flags_;
// Map MenuItems to MenuModels. Used to implement WillShowMenu().
std::map<MenuItemView*, ui::MenuModel*> menu_map_;
DISALLOW_COPY_AND_ASSIGN(MenuModelAdapter);
};
} // namespace views
#endif // VIEWS_CONTROLS_MENU_MENU_MODEL_ADAPTER_H_
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