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// Copyright 2013 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 CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_
#define CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_
#include "base/memory/scoped_ptr.h"
#include "cc/animation/animation_curve.h"
#include "cc/base/cc_export.h"
namespace cc {
class TimingFunction;
class CC_EXPORT ScrollOffsetAnimationCurve : public AnimationCurve {
public:
static scoped_ptr<ScrollOffsetAnimationCurve> Create(
const gfx::Vector2dF& target_value,
scoped_ptr<TimingFunction> timing_function);
virtual ~ScrollOffsetAnimationCurve();
void SetInitialValue(const gfx::Vector2dF& initial_value);
gfx::Vector2dF GetValue(double t) const;
// AnimationCurve implementation
virtual double Duration() const OVERRIDE;
virtual CurveType Type() const OVERRIDE;
virtual scoped_ptr<AnimationCurve> Clone() const OVERRIDE;
private:
ScrollOffsetAnimationCurve(const gfx::Vector2dF& target_value,
scoped_ptr <TimingFunction> timing_function);
gfx::Vector2dF initial_value_;
gfx::Vector2dF target_value_;
double duration_;
scoped_ptr<TimingFunction> timing_function_;
DISALLOW_COPY_AND_ASSIGN(ScrollOffsetAnimationCurve);
};
} // namespace cc
#endif // CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_
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