| // 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_CLIENT_VISIBILITY_CLIENT_H_ |
| #define UI_AURA_CLIENT_VISIBILITY_CLIENT_H_ |
| |
| #include "ui/aura/aura_export.h" |
| |
| namespace aura { |
| class Window; |
| namespace client { |
| |
| // An interface implemented by an object that manages the visibility of Windows' |
| // layers as Window visibility changes. |
| class AURA_EXPORT VisibilityClient { |
| public: |
| // Called when |window|'s visibility is changing to |visible|. The implementor |
| // can decide whether or not to pass on the visibility to the underlying |
| // layer. |
| virtual void UpdateLayerVisibility(Window* window, bool visible) = 0; |
| |
| protected: |
| virtual ~VisibilityClient() {} |
| }; |
| |
| // Sets the VisibilityClient on the Window. |
| AURA_EXPORT void SetVisibilityClient(Window* window, VisibilityClient* client); |
| |
| // Gets the VisibilityClient for the window. This will crawl up |window|'s |
| // hierarchy until it finds one. |
| AURA_EXPORT VisibilityClient* GetVisibilityClient(Window* window); |
| |
| } // namespace clients |
| } // namespace aura |
| |
| #endif // UI_AURA_CLIENT_VISIBILITY_CLIENT_H_ |