1// Copyright 2013 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 CHROME_BROWSER_CHROMEOS_UI_FOCUS_RING_LAYER_H_
6#define CHROME_BROWSER_CHROMEOS_UI_FOCUS_RING_LAYER_H_
7
8#include "base/basictypes.h"
9#include "base/memory/scoped_ptr.h"
10#include "ui/compositor/layer_delegate.h"
11#include "ui/gfx/rect.h"
12
13namespace aura {
14class Window;
15}
16
17namespace ui {
18class Layer;
19}
20
21namespace views {
22class View;
23}
24
25namespace chromeos {
26
27// FocusRingLayer draws a focus ring for a given view.
28class FocusRingLayer : public ui::LayerDelegate {
29 public:
30  FocusRingLayer();
31  virtual ~FocusRingLayer();
32
33  // Create the layer and update its bounds and position in the hierarchy.
34  void Update();
35
36  // Updates the focus ring layer for the view or clears it if |view| is NULL.
37  void SetForView(views::View* view);
38
39 private:
40  // ui::LayerDelegate overrides:
41  virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE;
42  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
43  virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE;
44
45  // The window containing focus.
46  aura::Window* window_;
47
48  // The current root window containing the focused object.
49  aura::Window* root_window_;
50
51  // The bounding rectangle of the focused object, in |window_| coordinates.
52  gfx::Rect focus_ring_;
53
54  // The current layer.
55  scoped_ptr<ui::Layer> layer_;
56
57  DISALLOW_COPY_AND_ASSIGN(FocusRingLayer);
58};
59
60}  // namespace chromeos
61
62#endif  // CHROME_BROWSER_CHROMEOS_UI_FOCUS_RING_LAYER_H_
63