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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 ASH_SCREEN_ROTATION_H_
#define ASH_SCREEN_ROTATION_H_
#include "ash/ash_export.h"
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "ui/compositor/layer_animation_element.h"
#include "ui/gfx/point.h"
namespace ui {
class InterpolatedTransform;
class Layer;
}
namespace aura {
class RootWindow;
}
namespace ash {
// A screen rotation represents a single transition from one screen 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 ScreenRotation : public ui::LayerAnimationElement {
public:
// |degrees| are clockwise. |layer| is the target of the animation. Does not
// take ownership of |layer|.
ScreenRotation(int degrees, ui::Layer* layer);
virtual ~ScreenRotation();
private:
// Generates the intermediate transformation matrices used during the
// animation.
void InitTransform(ui::Layer* layer);
// Implementation of ui::LayerAnimationDelegate
virtual void OnStart(ui::LayerAnimationDelegate* delegate) OVERRIDE;
virtual bool OnProgress(double t,
ui::LayerAnimationDelegate* delegate) OVERRIDE;
virtual void OnGetTarget(TargetValue* target) const OVERRIDE;
virtual void OnAbort(ui::LayerAnimationDelegate* delegate) OVERRIDE;
static const ui::LayerAnimationElement::AnimatableProperties&
GetProperties();
scoped_ptr<ui::InterpolatedTransform> interpolated_transform_;
// The number of degrees to rotate.
int degrees_;
// The target origin.
gfx::Point new_origin_;
DISALLOW_COPY_AND_ASSIGN(ScreenRotation);
};
} // namespace ash
#endif // ASH_SCREEN_ROTATION_H_
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