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// Copyright (c) 2009 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 CONTROLS_MENU_VIEWS_SIMPLE_MENU_MODEL_H_
#define CONTROLS_MENU_VIEWS_SIMPLE_MENU_MODEL_H_
#include <vector>
#include "views/controls/menu/menu_2.h"
namespace views {
// A simple Menu2Model implementation with an imperative API for adding menu
// items. This makes it easy to construct fixed menus. Menus populated by
// dynamic data sources may be better off implementing Menu2Model directly.
// The breadth of Menu2Model is not exposed through this API.
class SimpleMenuModel : public Menu2Model {
public:
class Delegate {
public:
// Methods for determining the state of specific command ids.
virtual bool IsCommandIdChecked(int command_id) const = 0;
virtual bool IsCommandIdEnabled(int command_id) const = 0;
// Gets the accelerator for the specified command id. Returns true if the
// command id has a valid accelerator, false otherwise.
virtual bool GetAcceleratorForCommandId(
int command_id,
views::Accelerator* accelerator) = 0;
// Some command ids have labels that change over time.
virtual bool IsLabelForCommandIdDynamic(int command_id) const {
return false;
}
virtual std::wstring GetLabelForCommandId(int command_id) const {
return std::wstring();
}
// Notifies the delegate that the item with the specified command id was
// visually highlighted within the menu.
virtual void CommandIdHighlighted(int command_id) {}
// Performs the action associated with the specified command id.
virtual void ExecuteCommand(int command_id) = 0;
};
// The Delegate can be NULL, though if it is items can't be checked or
// disabled.
explicit SimpleMenuModel(Delegate* delegate);
virtual ~SimpleMenuModel();
// Methods for adding items to the model.
void AddItem(int command_id, const std::wstring& label);
void AddItemWithStringId(int command_id, int string_id);
void AddSeparator();
void AddCheckItem(int command_id, const std::wstring& label);
void AddCheckItemWithStringId(int command_id, int string_id);
void AddRadioItem(int command_id, const std::wstring& label, int group_id);
void AddRadioItemWithStringId(int command_id, int string_id, int group_id);
void AddSubMenu(const std::wstring& label, Menu2Model* model);
void AddSubMenuWithStringId(int string_id, Menu2Model* model);
// Overridden from Menu2Model:
virtual bool HasIcons() const;
virtual int GetItemCount() const;
virtual ItemType GetTypeAt(int index) const;
virtual int GetCommandIdAt(int index) const;
virtual std::wstring GetLabelAt(int index) const;
virtual bool IsLabelDynamicAt(int index) const;
virtual bool GetAcceleratorAt(int index,
views::Accelerator* accelerator) const;
virtual bool IsItemCheckedAt(int index) const;
virtual int GetGroupIdAt(int index) const;
virtual bool GetIconAt(int index, SkBitmap* icon) const;
virtual bool IsEnabledAt(int index) const;
virtual void HighlightChangedTo(int index);
virtual void ActivatedAt(int index);
virtual Menu2Model* GetSubmenuModelAt(int index) const;
protected:
// Some variants of this model (SystemMenuModel) relies on items to be
// inserted backwards. This is counter-intuitive for the API, so rather than
// forcing customers to insert things backwards, we return the indices
// backwards instead. That's what this method is for. By default, it just
// returns what it's passed.
virtual int FlipIndex(int index) const { return index; }
private:
struct Item {
int command_id;
std::wstring label;
ItemType type;
int group_id;
Menu2Model* submenu;
};
std::vector<Item> items_;
Delegate* delegate_;
DISALLOW_COPY_AND_ASSIGN(SimpleMenuModel);
};
} // namespace views
#endif // CONTROLS_MENU_VIEWS_SIMPLE_MENU_MODEL_H_
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