| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_EVENTS_WIN_KEYBOARD_HOOK_OBSERVER_H_ |
| #define UI_EVENTS_WIN_KEYBOARD_HOOK_OBSERVER_H_ |
| |
| #include "base/component_export.h" |
| |
| namespace ui { |
| |
| // Used in conjunction with the KeyboardHookMonitor class to receive |
| // notifications when a low-level keyboard hook is registered or unregistered. |
| class COMPONENT_EXPORT(KEYBOARD_HOOK) KeyboardHookObserver |
| : public base::CheckedObserver { |
| public: |
| // Called when a low-level keyboard hook is registered. |
| virtual void OnHookRegistered() {} |
| |
| // Called when a low-level keyboard hook is unregistered. |
| virtual void OnHookUnregistered() {} |
| |
| protected: |
| ~KeyboardHookObserver() override = default; |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_EVENTS_WIN_KEYBOARD_HOOK_OBSERVER_H_ |