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
  18 // AlwaysOnTopController puts window into proper containers based on its
  19 // 'AlwaysOnTop' property. That is, putting a window into the worskpace
  20 // container if its "AlwaysOnTop" property is false. Otherwise, put it in
  21 // |always_on_top_container_|.
  22 class AlwaysOnTopController : public aura::WindowObserver {
  23  public:
  24   AlwaysOnTopController();
  25   ~AlwaysOnTopController() override;
  26
  27   // Sets the container for always on top windows.
  28   void SetAlwaysOnTopContainer(aura::Window* always_on_top_container);
  29
  30   // Gets container for given |window| based on its "AlwaysOnTop" property.
  31   aura::Window* GetContainer(aura::Window* window) const;
  32
  33  private:
  34   // Overridden from aura::WindowObserver:
  35   void OnWindowAdded(aura::Window* child) override;
  36   void OnWillRemoveWindow(aura::Window* child) override;
  37   void OnWindowPropertyChanged(aura::Window* window,
  38                                const void* key,
  39                                intptr_t old) override;
  40   void OnWindowDestroyed(aura::Window* window) override;
  41
  42   aura::Window* always_on_top_container_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(AlwaysOnTopController);
  45 };
  46
  47 }  // namepsace ash
  48
  49 #endif  // ASH_WM_ALWAYS_ON_TOP_CONTROLLER_H_