1// Copyright 2014 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_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_
6#define ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_
7
8#include "ash/ash_export.h"
9#include "base/macros.h"
10#include "ui/aura/layout_manager.h"
11
12namespace ash {
13
14// A layout manager that places children's layer at the physical pixel
15// boundaries.
16class ASH_EXPORT SnapToPixelLayoutManager : public aura::LayoutManager {
17 public:
18  explicit SnapToPixelLayoutManager(aura::Window* container);
19  virtual ~SnapToPixelLayoutManager();
20
21 protected:
22  // Overridden from aura::LayoutManager:
23  virtual void OnWindowResized() OVERRIDE;
24  virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
25  virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
26  virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
27  virtual void OnChildWindowVisibilityChanged(aura::Window* child,
28                                              bool visibile) OVERRIDE;
29  virtual void SetChildBounds(aura::Window* child,
30                              const gfx::Rect& requested_bounds) OVERRIDE;
31
32 private:
33  DISALLOW_COPY_AND_ASSIGN(SnapToPixelLayoutManager);
34};
35
36}  // namespace ash
37
38#endif  // ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_
39