| // Copyright (c) 2012 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 UI_AURA_ENV_OBSERVER_H_ |
| #define UI_AURA_ENV_OBSERVER_H_ |
| |
| #include "ui/aura/aura_export.h" |
| |
| namespace aura { |
| |
| class Window; |
| class WindowTreeHost; |
| |
| class AURA_EXPORT EnvObserver { |
| public: |
| // Called when |window| has been initialized. |
| virtual void OnWindowInitialized(Window* window) = 0; |
| |
| // Called when a WindowTreeHost is initialized. |
| virtual void OnHostInitialized(WindowTreeHost* host) {} |
| |
| // Called when a WindowTreeHost is activated. |
| virtual void OnHostActivated(WindowTreeHost* host) {} |
| |
| // Called right before Env is destroyed. |
| virtual void OnWillDestroyEnv() {} |
| |
| protected: |
| virtual ~EnvObserver() {} |
| }; |
| |
| } // namespace aura |
| |
| #endif // UI_AURA_ENV_OBSERVER_H_ |