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// 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();
// Reset the overscan insets to default value. If the display has
// overscan, the default value is the display's default overscan
// value. Otherwise, the default value is the old |initial_insets_|.
void Reset();
// Updates the insets and redraw the visual feedback.
void UpdateInsets(const gfx::Insets& insets);
const gfx::Insets& insets() const { return insets_; }
private:
// ui::LayerDelegate overrides:
virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE;
virtual void OnDelegatedFrameDamage(
const gfx::Rect& damage_rect_in_dip) OVERRIDE;
virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE;
// The target display.
const gfx::Display display_;
// The current insets.
gfx::Insets insets_;
// The insets initially given. Stored so we can undo the insets later.
gfx::Insets initial_insets_;
// Whether the current insets are committed to the system or not.
bool committed_;
// The visualization layer for the current calibration region.
scoped_ptr<ui::Layer> calibration_layer_;
DISALLOW_COPY_AND_ASSIGN(OverscanCalibrator);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_
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