| // 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_COMMON_WM_ACTIVATION_OBSERVER_H_ |
| #define ASH_COMMON_WM_ACTIVATION_OBSERVER_H_ |
| |
| #include "ash/ash_export.h" |
| |
| namespace ash { |
| |
| class WmWindow; |
| |
| // Used to track changes in activation. |
| class ASH_EXPORT WmActivationObserver { |
| public: |
| virtual void OnWindowActivated(WmWindow* gained_active, |
| WmWindow* lost_active) {} |
| |
| // Called when during window activation the currently active window is |
| // selected for activation. This can happen when a window requested for |
| // activation cannot be activated because a system modal window is active. |
| virtual void OnAttemptToReactivateWindow(WmWindow* request_active, |
| WmWindow* actual_active) {} |
| |
| protected: |
| virtual ~WmActivationObserver() {} |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_COMMON_WM_ACTIVATION_OBSERVER_H_ |