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#ifndef QMLGRAPHICSPATHVIEW_P_H
#define QMLGRAPHICSPATHVIEW_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qdatetime.h"
#include "qmlgraphicspathview_p.h"
#include "qmlgraphicsitem_p.h"
#include "qmlgraphicsvisualitemmodel_p.h"
#include "qml.h"
#include "private/qmlanimation_p_p.h"

QT_BEGIN_NAMESPACE

typedef struct PathViewItem{
    int index;
    QmlGraphicsItem* item;
}PathViewItem;

class QmlGraphicsPathViewPrivate : public QmlGraphicsItemPrivate
{
    Q_DECLARE_PUBLIC(QmlGraphicsPathView)

public:
    QmlGraphicsPathViewPrivate()
      : path(0), currentIndex(0), startPc(0), lastDist(0)
        , lastElapsed(0), stealMouse(false), ownModel(false), activeItem(0)
        , snapPos(0), dragMargin(0), moveOffset(this, &QmlGraphicsPathViewPrivate::setOffset)
        , firstIndex(0), pathItems(-1), pathOffset(0), requestedIndex(-1), model(0)
        , moveReason(Other)
    {
        fixupOffsetEvent = QmlTimeLineEvent::timeLineEvent<QmlGraphicsPathViewPrivate, &QmlGraphicsPathViewPrivate::fixOffset>(&moveOffset, this);
    }

    void init()
    {
        Q_Q(QmlGraphicsPathView);
        _offset = 0;
        q->setAcceptedMouseButtons(Qt::LeftButton);
        q->setFlag(QGraphicsItem::ItemIsFocusScope);
        q->setFiltersChildEvents(true);
        q->connect(&tl, SIGNAL(updated()), q, SLOT(ticked()));
    }

    QmlGraphicsItem *getItem(int modelIndex) {
        Q_Q(QmlGraphicsPathView);
        requestedIndex = modelIndex;
        QmlGraphicsItem *item = model->item(modelIndex);
        if (item)
            item->setParentItem(q);
        requestedIndex = -1;
        return item;
    }
    void releaseItem(QmlGraphicsItem *item) {
        model->release(item);
    }

    bool isValid() const {
        return model && model->count() > 0 && model->isValid() && path;
    }

    int calcCurrentIndex();
    void updateCurrent();
    void fixOffset();
    void setOffset(qreal offset);
    void regenerate();
    void updateItem(QmlGraphicsItem *, qreal);
    void snapToCurrent();
    QPointF pointNear(const QPointF &point, qreal *nearPercent=0) const;

    QmlGraphicsPath *path;
    int currentIndex;
    qreal startPc;
    QPointF startPoint;
    qreal lastDist;
    int lastElapsed;
    qreal _offset;
    bool stealMouse : 1;
    bool ownModel : 1;
    QTime lastPosTime;
    QPointF lastPos;
    QmlGraphicsItem *activeItem;
    qreal snapPos;
    qreal dragMargin;
    QmlTimeLine tl;
    QmlTimeLineValueProxy<QmlGraphicsPathViewPrivate> moveOffset;
    QmlTimeLineEvent fixupOffsetEvent;
    int firstIndex;
    int pathItems;
    int pathOffset;
    int requestedIndex;
    QList<QmlGraphicsItem *> items;
    QmlGraphicsVisualModel *model;
    QVariant modelVariant;
    enum MovementReason { Other, Key, Mouse };
    MovementReason moveReason;
};

QT_END_NAMESPACE

#endif