ash/wm/toplevel_layout_manager.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_TOPLEVEL_LAYOUT_MANAGER_H_
   6 #define ASH_WM_TOPLEVEL_LAYOUT_MANAGER_H_
   7 #pragma once
   8
   9 #include "ash/ash_export.h"
  10 #include "ash/wm/base_layout_manager.h"
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13
  14 namespace ash {
  15 namespace internal {
  16
  17 class ShelfLayoutManager;
  18
  19 // ToplevelLayoutManager is the LayoutManager installed on a container that
  20 // hosts what the shell considers to be top-level windows.
  21 //
  22 // ToplevelLayoutManager is used if the WorkspaceManager is not enabled and
  23 // compact window mode is not enabled. It is intended to implement the simplest
  24 // possible window management code. If you have a more complex window mode
  25 // please implement a new LayoutManager for it.
  26 class ASH_EXPORT ToplevelLayoutManager : public BaseLayoutManager {
  27  public:
  28   ToplevelLayoutManager();
  29   virtual ~ToplevelLayoutManager();
  30
  31   void set_shelf(ShelfLayoutManager* shelf) { shelf_ = shelf; }
  32
  33   // LayoutManager overrides:
  34   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
  35   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
  36   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
  37                                               bool visibile) OVERRIDE;
  38   virtual void SetChildBounds(aura::Window* child,
  39                               const gfx::Rect& requested_bounds) OVERRIDE;
  40
  41   // WindowObserver overrides:
  42   virtual void OnWindowPropertyChanged(aura::Window* window,
  43                                        const void* key,
  44                                        intptr_t old) OVERRIDE;
  45
  46  private:
  47   // Updates the visibility of the shelf based on if there are any full screen
  48   // windows.
  49   void UpdateShelfVisibility();
  50
  51   // Owned by the Shell container window LauncherContainer. May be NULL if
  52   // we're not using a shelf.
  53   ShelfLayoutManager* shelf_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(ToplevelLayoutManager);
  56 };
  57
  58 }  // namespace ash
  59 }  // namespace internal
  60
  61 #endif  // ASH_WM_TOPLEVEL_LAYOUT_MANAGER_H_