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 CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_
6#define CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_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/display.h"
12#include "ui/gfx/insets.h"
13#include "ui/gfx/rect.h"
14
15namespace ui {
16class Layer;
17}
18
19namespace chromeos {
20
21// This is used to show the visible feedback to the user's operations for
22// calibrating display overscan settings.
23class OverscanCalibrator : public ui::LayerDelegate {
24 public:
25  OverscanCalibrator(const gfx::Display& target_display,
26                     const gfx::Insets& initial_insets);
27  virtual ~OverscanCalibrator();
28
29  // Commits the current insets data to the system.
30  void Commit();
31
32  // Reset the overscan insets to default value.  If the display has
33  // overscan, the default value is the display's default overscan
34  // value. Otherwise, the default value is the old |initial_insets_|.
35  void Reset();
36
37  // Updates the insets and redraw the visual feedback.
38  void UpdateInsets(const gfx::Insets& insets);
39
40  const gfx::Insets& insets() const { return insets_; }
41
42 private:
43  // ui::LayerDelegate overrides:
44  virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE;
45  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
46  virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE;
47
48  // The target display.
49  const gfx::Display display_;
50
51  // The current insets.
52  gfx::Insets insets_;
53
54  // The insets initially given. Stored so we can undo the insets later.
55  gfx::Insets initial_insets_;
56
57  // Whether the current insets are committed to the system or not.
58  bool committed_;
59
60  // The visualization layer for the current calibration region.
61  scoped_ptr<ui::Layer> calibration_layer_;
62
63  DISALLOW_COPY_AND_ASSIGN(OverscanCalibrator);
64};
65
66}  // namespace chromeos
67
68#endif  // CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_
69