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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_ROTATOR_WINDOW_ROTATION_H_
#define ASH_ROTATOR_WINDOW_ROTATION_H_
#include <memory>
#include "ash/ash_export.h"
#include "ui/compositor/layer_animation_element.h"
#include "ui/gfx/geometry/point.h"
namespace ui {
class InterpolatedTransform;
class Layer;
}
namespace ash {
// A window rotation represents a single transition from one window orientation
// to another. The intended usage is that a new instance of the class is
// created for every transition. It is possible to update the target orientation
// in the middle of a transition.
class ASH_EXPORT WindowRotation : public ui::LayerAnimationElement {
public:
// |degrees| are clockwise. |layer| is the target of the animation. Does not
// take ownership of |layer|.
WindowRotation(int degrees, ui::Layer* layer);
WindowRotation(const WindowRotation&) = delete;
WindowRotation& operator=(const WindowRotation&) = delete;
~WindowRotation() override;
private:
// Generates the intermediate transformation matrices used during the
// animation.
void InitTransform(ui::Layer* layer);
// Implementation of ui::LayerAnimationDelegate
void OnStart(ui::LayerAnimationDelegate* delegate) override;
bool OnProgress(double t, ui::LayerAnimationDelegate* delegate) override;
void OnGetTarget(TargetValue* target) const override;
void OnAbort(ui::LayerAnimationDelegate* delegate) override;
std::unique_ptr<ui::InterpolatedTransform> interpolated_transform_;
// The number of degrees to rotate.
int degrees_;
// The target origin.
gfx::Point new_origin_;
};
} // namespace ash
#endif // ASH_ROTATOR_WINDOW_ROTATION_H_
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