ash/snap_to_pixel_layout_manager.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_
#define ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_

#include "ash/ash_export.h"
#include "base/macros.h"
#include "ui/aura/layout_manager.h"

namespace ash {

// A layout manager that places children's layer at the physical pixel
// boundaries.
class ASH_EXPORT SnapToPixelLayoutManager : public aura::LayoutManager {
 public:
  explicit SnapToPixelLayoutManager(aura::Window* container);
  virtual ~SnapToPixelLayoutManager();

 protected:
  // Overridden from aura::LayoutManager:
  virtual void OnWindowResized() override;
  virtual void OnWindowAddedToLayout(aura::Window* child) override;
  virtual void OnWillRemoveWindowFromLayout(aura::Window* child) override;
  virtual void OnWindowRemovedFromLayout(aura::Window* child) override;
  virtual void OnChildWindowVisibilityChanged(aura::Window* child,
                                              bool visibile) override;
  virtual void SetChildBounds(aura::Window* child,
                              const gfx::Rect& requested_bounds) override;

 private:
  DISALLOW_COPY_AND_ASSIGN(SnapToPixelLayoutManager);
};

}  // namespace ash

#endif  // ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_