Source/WebCore/platform/ScrollAnimatorWin.h

/*
 * Copyright (c) 2010, Google Inc. All rights reserved.
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#ifndef ScrollAnimatorWin_h
#define ScrollAnimatorWin_h

#if ENABLE(SMOOTH_SCROLLING)

#include "ScrollAnimator.h"
#include "Timer.h"

namespace WebCore {

class ScrollAnimatorWin : public ScrollAnimator {
public:
    ScrollAnimatorWin(ScrollableArea*);
    virtual ~ScrollAnimatorWin();

    virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier);
    virtual void scrollToOffsetWithoutAnimation(const FloatPoint&);

private:
    struct PerAxisData {
        PerAxisData(ScrollAnimatorWin* parent, float* currentPos);

        float* m_currentPos;
        float m_desiredPos;
        float m_currentVelocity;
        float m_desiredVelocity;
        double m_lastAnimationTime;
        Timer<ScrollAnimatorWin> m_animationTimer;
    };

    static double accelerationTime();
    static const double animationTimerDelay;

    void animationTimerFired(Timer<ScrollAnimatorWin>*);
    void stopAnimationTimerIfNeeded(PerAxisData*);
    void animateScroll(PerAxisData*);

    PerAxisData m_horizontalData;
    PerAxisData m_verticalData;
};

} // namespace WebCore

#endif // ENABLE(SMOOTH_SCROLLING)

#endif // ScrollAnimatorWin_h