ash/wm/status_area_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_STATUS_AREA_LAYOUT_MANAGER_H_
   6 #define ASH_WM_STATUS_AREA_LAYOUT_MANAGER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "ui/aura/layout_manager.h"
  11
  12 namespace ash {
  13 class ShelfWidget;
  14 namespace internal {
  15
  16 // StatusAreaLayoutManager is a layout manager responsible for the status area.
  17 // In any case when status area needs relayout it redirects this call to
  18 // ShelfLayoutManager.
  19 class StatusAreaLayoutManager : public aura::LayoutManager {
  20  public:
  21   explicit StatusAreaLayoutManager(ShelfWidget* shelf);
  22   virtual ~StatusAreaLayoutManager();
  23
  24   // Overridden from aura::LayoutManager:
  25   virtual void OnWindowResized() OVERRIDE;
  26   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
  27   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
  28   virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
  29   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
  30                                               bool visible) OVERRIDE;
  31   virtual void SetChildBounds(aura::Window* child,
  32                               const gfx::Rect& requested_bounds) OVERRIDE;
  33
  34  private:
  35   // Updates layout of the status area. Effectively calls ShelfLayoutManager
  36   // to update layout of the shelf.
  37   void LayoutStatusArea();
  38
  39   // True when inside LayoutStatusArea method.
  40   // Used to prevent calling itself again from SetChildBounds().
  41   bool in_layout_;
  42
  43   ShelfWidget* shelf_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(StatusAreaLayoutManager);
  46 };
  47
  48 }  // namespace internal
  49 }  // namespace ash
  50
  51 #endif  // ASH_WM_STATUS_AREA_LAYOUT_MANAGER_H_