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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_BUTTON_BUTTON_DROPDOWN_H_
#define VIEWS_CONTROLS_BUTTON_BUTTON_DROPDOWN_H_
#pragma once
#include "base/task.h"
#include "views/controls/button/image_button.h"
namespace ui {
class MenuModel;
} // namespace ui
namespace views {
////////////////////////////////////////////////////////////////////////////////
//
// ButtonDropDown
//
// A button class that when pressed (and held) or pressed (and drag down) will
// display a menu
//
////////////////////////////////////////////////////////////////////////////////
class VIEWS_API ButtonDropDown : public ImageButton {
public:
// The button's class name.
static const char kViewClassName[];
ButtonDropDown(ButtonListener* listener, ui::MenuModel* model);
virtual ~ButtonDropDown();
// Overridden from views::View
virtual bool OnMousePressed(const MouseEvent& event) OVERRIDE;
virtual bool OnMouseDragged(const MouseEvent& event) OVERRIDE;
virtual void OnMouseReleased(const MouseEvent& event) OVERRIDE;
virtual std::string GetClassName() const OVERRIDE;
// Showing the drop down results in a MouseCaptureLost, we need to ignore it.
virtual void OnMouseCaptureLost() OVERRIDE {}
virtual void OnMouseExited(const MouseEvent& event) OVERRIDE;
// Display the right-click menu, as triggered by the keyboard, for instance.
// Using the member function ShowDropDownMenu for the actual display.
virtual void ShowContextMenu(const gfx::Point& p,
bool is_mouse_gesture) OVERRIDE;
virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
protected:
// Overridden from CustomButton. Returns true if the button should become
// pressed when a user holds the mouse down over the button. For this
// implementation, both left and right mouse buttons can trigger a change
// to the PUSHED state.
virtual bool ShouldEnterPushedState(const MouseEvent& event) OVERRIDE;
private:
// Internal function to show the dropdown menu
void ShowDropDownMenu(gfx::NativeView window);
// The model that populates the attached menu.
ui::MenuModel* model_;
// 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 // VIEWS_CONTROLS_BUTTON_BUTTON_DROPDOWN_H_
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