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// Copyright (c) 2006-2008 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 CHROME_VIEWS_BUTTON_DROPDOWN_H__
#define CHROME_VIEWS_BUTTON_DROPDOWN_H__
#include "base/task.h"
#include "chrome/views/button.h"
#include "chrome/views/menu.h"
namespace views {
////////////////////////////////////////////////////////////////////////////////
//
// ButtonDropDown
//
// A button class that when pressed (and held) or pressed (and drag down) will
// display a menu
//
////////////////////////////////////////////////////////////////////////////////
class ButtonDropDown : public Button {
public:
explicit ButtonDropDown(Menu::Delegate* menu_delegate);
virtual ~ButtonDropDown();
// Returns the MSAA default action of the current view. The string returned
// describes the default action that will occur when executing
// IAccessible::DoDefaultAction.
bool GetAccessibleDefaultAction(std::wstring* action);
// Returns the MSAA role of the current view. The role is what assistive
// technologies (ATs) use to determine what behavior to expect from a given
// control.
bool GetAccessibleRole(VARIANT* role);
// Returns the MSAA state of the current view. Sets the input VARIANT
// appropriately, and returns true if a change was performed successfully.
// Overriden from View.
virtual bool GetAccessibleState(VARIANT* state);
private:
// Overridden from Button
virtual bool OnMousePressed(const MouseEvent& e);
virtual void OnMouseReleased(const MouseEvent& e, bool canceled);
virtual bool OnMouseDragged(const MouseEvent& e);
// Overridden from View. Used to display the right-click menu, as triggered
// by the keyboard, for instance. Using the member function ShowDropDownMenu
// for the actual display.
virtual void ShowContextMenu(int x,
int y,
bool is_mouse_gesture);
// Internal function to show the dropdown menu
void ShowDropDownMenu(HWND window);
// Specifies who to delegate populating the menu
Menu::Delegate* menu_delegate_;
// Y position of mouse when left mouse button is pressed
int y_position_on_lbuttondown_;
// A factory for tasks that show the dropdown context menu for the button.
ScopedRunnableMethodFactory<ButtonDropDown> show_menu_factory_;
DISALLOW_COPY_AND_ASSIGN(ButtonDropDown);
};
} // namespace views
#endif // CHROME_VIEWS_BUTTON_DROPDOWN_H__
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