/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd
** All rights reserved.
** For any questions to The Qt Company, please use contact form at http://qt.io
**
** This file is part of the Qt Charts module.
**
** Licensees holding valid commercial license for Qt may use this file in
** accordance with the Qt License Agreement provided with the Software
** or, alternatively, in accordance with the terms contained in a written
** agreement between you and The Qt Company.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.io
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****************************************************************************/

//  W A R N I N G
//  -------------
//
// This file is not part of the Qt Enterprise Chart 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.

#ifndef SPLINEANIMATION_P_H
#define SPLINEANIMATION_P_H
#include <private/xyanimation_p.h>
#include <QtCore/QPointF>

typedef  QPair<QVector<QPointF >, QVector<QPointF > >  SplineVector;

QT_CHARTS_BEGIN_NAMESPACE

class SplineChartItem;

class SplineAnimation : public XYAnimation
{
public:
    SplineAnimation(SplineChartItem *item);
    ~SplineAnimation();
    void setup(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints, QVector<QPointF> &oldContorlPoints, QVector<QPointF> &newControlPoints, int index = -1);

protected:
    QVariant interpolated(const QVariant &start, const QVariant &end, qreal progress) const;
    void updateCurrentValue(const QVariant &value);
    void updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState);

private:
    SplineVector m_oldSpline;
    SplineVector m_newSpline;
    SplineChartItem *m_item;
    bool m_valid;
};

QT_CHARTS_END_NAMESPACE

#endif