1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_AURA_CLIENT_VISIBILITY_CLIENT_H_ 6 #define UI_AURA_CLIENT_VISIBILITY_CLIENT_H_ 7 8 #include "ui/aura/aura_export.h" 9 10 namespace aura { 11 class Window; 12 namespace client { 13 14 // An interface implemented by an object that manages the visibility of Windows' 15 // layers as Window visibility changes. 16 class AURA_EXPORT VisibilityClient { 17 public: 18 // Called when |window|'s visibility is changing to |visible|. The implementor 19 // can decide whether or not to pass on the visibility to the underlying 20 // layer. 21 virtual void UpdateLayerVisibility(Window* window, bool visible) = 0; 22 23 protected: 24 virtual ~VisibilityClient() {} 25 }; 26 27 // Sets the VisibilityClient on the Window. 28 AURA_EXPORT void SetVisibilityClient(Window* window, VisibilityClient* client); 29 30 // Gets the VisibilityClient for the window. This will crawl up |window|'s 31 // hierarchy until it finds one. 32 AURA_EXPORT VisibilityClient* GetVisibilityClient(Window* window); 33 34 } // namespace clients 35 } // namespace aura 36 37 #endif // UI_AURA_CLIENT_VISIBILITY_CLIENT_H_ 38
