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      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_VIEWS_COREWM_SHADOW_CONTROLLER_H_
      6 #define UI_VIEWS_COREWM_SHADOW_CONTROLLER_H_
      7 
      8 #include <map>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/compiler_specific.h"
     12 #include "base/memory/ref_counted.h"
     13 #include "ui/aura/client/activation_change_observer.h"
     14 #include "ui/views/views_export.h"
     15 
     16 namespace aura {
     17 class Window;
     18 namespace client {
     19 class ActivationClient;
     20 }
     21 }
     22 namespace gfx {
     23 class Rect;
     24 }
     25 
     26 namespace views {
     27 namespace corewm {
     28 
     29 class Shadow;
     30 
     31 // ShadowController observes changes to windows and creates and updates drop
     32 // shadows as needed. ShadowController itself is light weight and per
     33 // ActivationClient. ShadowController delegates to its implementation class,
     34 // which observes all window creation.
     35 class VIEWS_EXPORT ShadowController :
     36     public aura::client::ActivationChangeObserver {
     37  public:
     38   class VIEWS_EXPORT TestApi {
     39    public:
     40     explicit TestApi(ShadowController* controller) : controller_(controller) {}
     41     ~TestApi() {}
     42 
     43     Shadow* GetShadowForWindow(aura::Window* window);
     44 
     45    private:
     46     ShadowController* controller_;  // not owned
     47 
     48     DISALLOW_COPY_AND_ASSIGN(TestApi);
     49   };
     50 
     51   explicit ShadowController(aura::client::ActivationClient* activation_client);
     52   virtual ~ShadowController();
     53 
     54   // aura::client::ActivationChangeObserver overrides:
     55   virtual void OnWindowActivated(aura::Window* gained_active,
     56                                  aura::Window* lost_active) OVERRIDE;
     57 
     58  private:
     59   class Impl;
     60 
     61   aura::client::ActivationClient* activation_client_;
     62 
     63   scoped_refptr<Impl> impl_;
     64 
     65   DISALLOW_COPY_AND_ASSIGN(ShadowController);
     66 };
     67 
     68 }  // namespace corewm
     69 }  // namespace views
     70 
     71 #endif  // UI_VIEWS_COREWM_SHADOW_CONTROLLER_H_
     72