ui/wm/core/shadow_controller.h

   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_WM_CORE_SHADOW_CONTROLLER_H_
   6 #define UI_WM_CORE_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/wm/public/activation_change_observer.h"
  14 #include "ui/wm/wm_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 wm {
  27
  28 class Shadow;
  29
  30 // ShadowController observes changes to windows and creates and updates drop
  31 // shadows as needed. ShadowController itself is light weight and per
  32 // ActivationClient. ShadowController delegates to its implementation class,
  33 // which observes all window creation.
  34 class WM_EXPORT ShadowController :
  35     public aura::client::ActivationChangeObserver {
  36  public:
  37   class WM_EXPORT TestApi {
  38    public:
  39     explicit TestApi(ShadowController* controller) : controller_(controller) {}
  40     ~TestApi() {}
  41
  42     Shadow* GetShadowForWindow(aura::Window* window);
  43
  44    private:
  45     ShadowController* controller_;  // not owned
  46
  47     DISALLOW_COPY_AND_ASSIGN(TestApi);
  48   };
  49
  50   explicit ShadowController(aura::client::ActivationClient* activation_client);
  51   ~ShadowController() override;
  52
  53   // aura::client::ActivationChangeObserver overrides:
  54   void OnWindowActivated(
  55       aura::client::ActivationChangeObserver::ActivationReason reason,
  56       aura::Window* gained_active,
  57       aura::Window* lost_active) override;
  58
  59  private:
  60   class Impl;
  61
  62   aura::client::ActivationClient* activation_client_;
  63
  64   scoped_refptr<Impl> impl_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(ShadowController);
  67 };
  68
  69 }  // namespace wm
  70
  71 #endif  // UI_WM_CORE_SHADOW_CONTROLLER_H_