| // 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 "base/macros.h" |
| #include "ui/views/controls/button/image_button.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 views::ImageButton { |
| public: |
| BackButton(); |
| ~BackButton() override; |
| |
| // Get the center point of the back button used to draw its background and ink |
| // drops. |
| gfx::Point GetCenterPoint() const; |
| |
| protected: |
| // views::ImageButton: |
| void OnGestureEvent(ui::GestureEvent* event) override; |
| bool OnMousePressed(const ui::MouseEvent& event) override; |
| void OnMouseReleased(const ui::MouseEvent& event) override; |
| std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override; |
| std::unique_ptr<views::InkDrop> CreateInkDrop() override; |
| std::unique_ptr<views::InkDropMask> CreateInkDropMask() const override; |
| void PaintButtonContents(gfx::Canvas* canvas) 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_ |