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#ifndef QSEQUENTIALANIMATIONGROUPJOB_P_H
#define QSEQUENTIALANIMATIONGROUPJOB_P_H

#include <private/qanimationgroupjob_p.h>

QT_BEGIN_NAMESPACE

class QPauseAnimationJob;
class Q_QML_PRIVATE_EXPORT QSequentialAnimationGroupJob : public QAnimationGroupJob
{
    Q_DISABLE_COPY(QSequentialAnimationGroupJob)
public:
    QSequentialAnimationGroupJob();
    ~QSequentialAnimationGroupJob();

    int duration() const;

    QAbstractAnimationJob *currentAnimation() const { return m_currentAnimation; }

protected:
    void updateCurrentTime(int);
    void updateState(QAbstractAnimationJob::State newState, QAbstractAnimationJob::State oldState);
    void updateDirection(QAbstractAnimationJob::Direction direction);
    void uncontrolledAnimationFinished(QAbstractAnimationJob *animation);

private:
    struct AnimationIndex
    {
        AnimationIndex() : afterCurrent(false), timeOffset(0), animation(0) {}
        // AnimationIndex points to the animation at timeOffset, skipping 0 duration animations.
        // Note that the index semantic is slightly different depending on the direction.
        bool afterCurrent;  //whether animation is before or after m_currentAnimation   //TODO: make enum Before/After/Same
        int timeOffset; // time offset when the animation at index starts.
        QAbstractAnimationJob *animation; //points to the animation at timeOffset
    };

    int animationActualTotalDuration(QAbstractAnimationJob *anim) const;
    AnimationIndex indexForCurrentTime() const;

    void setCurrentAnimation(QAbstractAnimationJob *anim, bool intermediate = false);
    void activateCurrentAnimation(bool intermediate = false);

    void animationInserted(QAbstractAnimationJob *anim);
    void animationRemoved(QAbstractAnimationJob *anim,QAbstractAnimationJob*,QAbstractAnimationJob*);

    bool atEnd() const;

    void restart();

    // handle time changes
    void rewindForwards(const AnimationIndex &newAnimationIndex);
    void advanceForwards(const AnimationIndex &newAnimationIndex);

    //state
    QAbstractAnimationJob *m_currentAnimation;
    int m_previousLoop;
};

QT_END_NAMESPACE

#endif //QSEQUENTIALANIMATIONGROUPJOB_P_H