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// Copyright 2017 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 ASH_SHELF_BACK_BUTTON_H_
#define ASH_SHELF_BACK_BUTTON_H_
#include <memory>
#include "ash/ash_export.h"
#include "ash/shelf/shelf_control_button.h"
#include "base/macros.h"
namespace ash {
// The back button shown on the shelf when tablet mode is enabled. Its opacity
// and visiblity are handled by its parent, ShelfView, to ensure the fade
// in/out of the icon matches the movement of ShelfView's items.
class ASH_EXPORT BackButton : public ShelfControlButton {
public:
static const char kViewClassName[];
explicit BackButton(ShelfView* shelf_view);
~BackButton() override;
protected:
// views::Button:
void OnGestureEvent(ui::GestureEvent* event) override;
bool OnMousePressed(const ui::MouseEvent& event) override;
void OnMouseReleased(const ui::MouseEvent& event) override;
void PaintButtonContents(gfx::Canvas* canvas) override;
const char* GetClassName() const override;
private:
// Generate and send a VKEY_BROWSER_BACK key event when the back button
// is pressed.
void GenerateAndSendBackEvent(const ui::EventType& original_event_type);
DISALLOW_COPY_AND_ASSIGN(BackButton);
};
} // namespace ash
#endif // ASH_SHELF_BACK_BUTTON_H_