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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.
#include <memory>
#include "ash/ash_export.h"
#include "base/macros.h"
#include "ui/compositor/layer_delegate.h"
#include "ui/display/display.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/geometry/rect.h"
namespace ui {
class Layer;
namespace ash {
// This is used to show the visible feedback to the user's operations for
// calibrating display overscan settings.
class ASH_EXPORT OverscanCalibrator : public ui::LayerDelegate {
OverscanCalibrator(const display::Display& target_display,
const gfx::Insets& initial_insets);
~OverscanCalibrator() override;
// 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_; }
// ui::LayerDelegate overrides:
void OnPaintLayer(const ui::PaintContext& context) override;
void OnDeviceScaleFactorChanged(float old_device_scale_factor,
float new_device_scale_factor) override;
// The target display.
const display::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.
std::unique_ptr<ui::Layer> calibration_layer_;
} // namespace ash