| // 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_TABLET_MODE_TABLET_MODE_OBSERVER_H_ |
| #define ASH_TABLET_MODE_TABLET_MODE_OBSERVER_H_ |
| |
| #include "ash/ash_export.h" |
| |
| namespace ash { |
| |
| // Used to observe tablet mode changes inside ash. Exported for tests. |
| // NOTE: Code in chrome should use TabletModeClientObserver. |
| class ASH_EXPORT TabletModeObserver { |
| public: |
| // Called when the tablet mode has started. Windows might still be animating |
| // though. |
| virtual void OnTabletModeStarted() {} |
| |
| // Called when the tablet mode is about to end. |
| virtual void OnTabletModeEnding() {} |
| |
| // Called when the tablet mode has ended. Windows may still be animating but |
| // have been restored. |
| virtual void OnTabletModeEnded() {} |
| |
| // Called when tablet mode blocks or unblocks events. This usually matches, |
| // exiting or entering tablet mode, except when an external mouse is |
| // connected. |
| virtual void OnTabletModeEventsBlockingChanged() {} |
| |
| protected: |
| virtual ~TabletModeObserver() {} |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_TABLET_MODE_TABLET_MODE_OBSERVER_H_ |