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