splineanimation_p.h

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt 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 <QtCharts/private/qchartglobal_p.h>

#include <QtCore/QPointF>

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

QT_BEGIN_NAMESPACE

class SplineChartItem;

class Q_CHARTS_EXPORT SplineAnimation : public XYAnimation

public:

    SplineAnimation(SplineChartItem *item, int duration, QEasingCurve &curve);

    ~SplineAnimation();

    void setup(const QList<QPointF> &oldPoints, const QList<QPointF> &newPoints,

               const QList<QPointF> &oldContorlPoints, const QList<QPointF> &newControlPoints,

               int index = -1);

protected:

    QVariant interpolated(const QVariant &start, const QVariant &end, qreal progress) const override;

    void updateCurrentValue(const QVariant &value) override;

    void updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState) override;

private:

    SplineVector m_oldSpline;

    SplineVector m_newSpline;

    SplineChartItem *m_item;

    bool m_valid;

};

QT_END_NAMESPACE

#endif