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#ifndef ANIMATION_H

#define ANIMATION_H

#include <QtGui>

#include <QtCore/qpropertyanimation.h>

class Animation : public QPropertyAnimation {

public:

    enum PathType {

        LinearPath,

        CirclePath,

        NPathTypes

    };

    Animation(QObject *target, const QByteArray &prop)

        : QPropertyAnimation(target, prop)

    {

        setPathType(LinearPath);

    }

    void setPathType(PathType pathType)

    {

        if (pathType >= NPathTypes)

            qWarning("Unknown pathType %d", pathType);

        m_pathType = pathType;

        m_path = QPainterPath();

    }

    void updateCurrentTime(int currentTime)

    {

        if (m_pathType == CirclePath) {

            if (m_path.isEmpty()) {

                QPointF to = endValue().toPointF();

                QPointF from = startValue().toPointF();

                m_path.moveTo(from);

                m_path.addEllipse(QRectF(from, to));

            }

            int dura = duration();

            const qreal progress = ((dura == 0) ? 1 : ((((currentTime - 1) % dura) + 1) / qreal(dura)));

            qreal easedProgress = easingCurve().valueForProgress(progress);

            if (easedProgress > 1.0) {

                easedProgress -= 1.0;

            } else if (easedProgress < 0) {

                easedProgress += 1.0;

            }

            QPointF pt = m_path.pointAtPercent(easedProgress);

            updateCurrentValue(pt);

            emit valueChanged(pt);

        } else {

            QPropertyAnimation::updateCurrentTime(currentTime);

        }

    }

    QPainterPath m_path;

    PathType m_pathType;

};

#endif // ANIMATION_H