ash/snap_to_pixel_layout_manager.h

   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
  12 namespace ash {
  13
  14 // A layout manager that places children's layer at the physical pixel
  15 // boundaries.
  16 class ASH_EXPORT SnapToPixelLayoutManager : public aura::LayoutManager {
  17  public:
  18   explicit SnapToPixelLayoutManager(aura::Window* container);
  19   ~SnapToPixelLayoutManager() override;
  20
  21  protected:
  22   // Overridden from aura::LayoutManager:
  23   void OnWindowResized() override;
  24   void OnWindowAddedToLayout(aura::Window* child) override;
  25   void OnWillRemoveWindowFromLayout(aura::Window* child) override;
  26   void OnWindowRemovedFromLayout(aura::Window* child) override;
  27   void OnChildWindowVisibilityChanged(aura::Window* child,
  28                                       bool visibile) override;
  29   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_