| // Copyright 2016 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_KEY_EVENT_WATCHER_H_ |
| #define ASH_KEY_EVENT_WATCHER_H_ |
| |
| #include <map> |
| |
| #include "ash/ash_export.h" |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "ui/base/accelerators/accelerator.h" |
| |
| namespace ui { |
| class KeyEvent; |
| } |
| |
| namespace ash { |
| |
| // This class watches the key event given in the form of accelerator |
| // and calls the registered callback. |
| class ASH_EXPORT KeyEventWatcher { |
| public: |
| using KeyEventCallback = base::Callback<void(const ui::KeyEvent&)>; |
| |
| KeyEventWatcher(); |
| virtual ~KeyEventWatcher(); |
| |
| // Add a callback that is called when the accelerator |accel| is |
| // matched. The key event will be consumed if a matching accelerator |
| // is found. |
| void AddKeyEventCallback(const ui::Accelerator& accel, |
| const KeyEventCallback& callback); |
| |
| protected: |
| // Finds and calls the registered callback whose accelerator matches |
| // the |event|. Returns false if no accelerator is matched. |
| bool HandleKeyEvent(const ui::KeyEvent& event); |
| |
| private: |
| std::map<ui::Accelerator, KeyEventCallback> callback_map_; |
| |
| DISALLOW_COPY_AND_ASSIGN(KeyEventWatcher); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_KEY_EVENT_WATCHER_H_ |