Overscan calibration UI.

chrome/browser/chromeos/display/overscan_calibrator.h

+// Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_
+#define CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/compositor/layer_delegate.h"
+#include "ui/gfx/display.h"
+#include "ui/gfx/insets.h"
+#include "ui/gfx/rect.h"
+
+namespace ui {
+class Layer;
+}
+
+namespace chromeos {
+
+// This is used to show the visible feedback to the user's operations for
+// calibrating display overscan settings.
+class OverscanCalibrator : public ui::LayerDelegate {
+ public:
+  OverscanCalibrator(const gfx::Display& target_display,
+                     const gfx::Insets& initial_insets);
+  virtual ~OverscanCalibrator();
+
+  // Commits the current insets data to the system.
+  void Commit();
+
+  // Updates the insets and redraw the visual feedback.
+  void UpdateInsets(const gfx::Insets& insets);
+
+ private:
+  // ui::LayerDelegate overrides:
+  virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
+  virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE;
+
+  const gfx::Display display_;
+  gfx::Insets insets_;
+  gfx::Rect inner_bounds_;
+  scoped_ptr<ui::Layer> calibration_layer_;
+
+  DISALLOW_COPY_AND_ASSIGN(OverscanCalibrator);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_