| // 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 COMPONENTS_EXO_SEAT_OBSERVER_H_ |
| #define COMPONENTS_EXO_SEAT_OBSERVER_H_ |
| |
| namespace exo { |
| |
| class Surface; |
| |
| // Observers can listen to various events on the Seats. |
| class SeatObserver { |
| public: |
| // Called when a new surface receives keyboard focus and before |
| // OnSurfaceFocused. |
| virtual void OnSurfaceFocusing(Surface* gaining_focus) = 0; |
| |
| // Called when a new surface receives keyboard focus. |
| virtual void OnSurfaceFocused(Surface* gained_focus) = 0; |
| |
| protected: |
| virtual ~SeatObserver() {} |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_SEAT_OBSERVER_H_ |