ash/wm/always_on_top_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 ASH_WM_ALWAYS_ON_TOP_CONTROLLER_H_
   6 #define ASH_WM_ALWAYS_ON_TOP_CONTROLLER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "ui/aura/window_observer.h"
  11
  12 namespace aura {
  13 class Window;
  14 }
  15
  16 namespace ash {
  17 namespace internal {
  18
  19 // AlwaysOnTopController puts window into proper containers based on its
  20 // 'AlwaysOnTop' property. That is, putting a window into the worskpace
  21 // container if its "AlwaysOnTop" property is false. Otherwise, put it in
  22 // |always_on_top_container_|.
  23 class AlwaysOnTopController : public aura::WindowObserver {
  24  public:
  25   AlwaysOnTopController();
  26   virtual ~AlwaysOnTopController();
  27
  28   // Sets the container for always on top windows.
  29   void SetAlwaysOnTopContainer(aura::Window* always_on_top_container);
  30
  31   // Gets container for given |window| based on its "AlwaysOnTop" property.
  32   aura::Window* GetContainer(aura::Window* window) const;
  33
  34  private:
  35   // Overridden from aura::WindowObserver:
  36   virtual void OnWindowAdded(aura::Window* child) OVERRIDE;
  37   virtual void OnWillRemoveWindow(aura::Window* child) OVERRIDE;
  38   virtual void OnWindowPropertyChanged(aura::Window* window,
  39                                        const void* key,
  40                                        intptr_t old) OVERRIDE;
  41   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
  42
  43   aura::Window* always_on_top_container_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(AlwaysOnTopController);
  46 };
  47
  48 }  // namepsace internal
  49 }  // namepsace ash
  50
  51 #endif  // ASH_WM_ALWAYS_ON_TOP_CONTROLLER_H_