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             qsplineseries.h
        
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      #ifndef QSPLINESERIES_H

      #define QSPLINESERIES_H

      #include "qchartglobal.h"

      #include <QtGlobal>

      #include "qlineseries.h"

      #include <QList>

      #include <QPointF>

      QTCOMMERCIALCHART_BEGIN_NAMESPACE

      class QTCOMMERCIALCHART_EXPORT QSplineSeries : public QLineSeries

      {

          Q_OBJECT

      public:

          QSplineSeries(QObject *parent = 0);

          QSeriesType type() const {return QSeries::SeriesTypeSpline;}

      //    int count() const { return m_x.size(); }

          QPointF controlPoint(int index) const {return m_controlPoints[index];}

          bool setModel(QAbstractItemModel* model);

          void setModelMapping(int modelX, int modelY, Qt::Orientation orientation = Qt::Vertical);

          // TODO: allow the user to set custom control points

      //    void setCustomControlPoints(QList<QPointsF> controlPoints);

      //    bool calculateControlPointsAutomatically();

      //    void setCalculateControlPointsAutomatically();

      private:

          void calculateControlPoints();

          QList<qreal> getFirstControlPoints(QList<qreal> rhs);

      private slots:

          void updateControlPoints();

      private:

          QList<QPointF> m_controlPoints;

      };

      QTCOMMERCIALCHART_END_NAMESPACE

      #endif // QSPLINESERIES_H

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				#ifndef QSPLINESERIES_H
				#define QSPLINESERIES_H

				#include "qchartglobal.h"
				#include <QtGlobal>
				#include "qlineseries.h"
				#include <QList>
				#include <QPointF>

				QTCOMMERCIALCHART_BEGIN_NAMESPACE

				class QTCOMMERCIALCHART_EXPORT QSplineSeries : public QLineSeries
				{
				Q_OBJECT
				public:

				QSplineSeries(QObject *parent = 0);
				QSeriesType type() const {return QSeries::SeriesTypeSpline;}

				// int count() const { return m_x.size(); }
				QPointF controlPoint(int index) const {return m_controlPoints[index];}
				bool setModel(QAbstractItemModel* model);

				void setModelMapping(int modelX, int modelY, Qt::Orientation orientation = Qt::Vertical);

				// TODO: allow the user to set custom control points
				// void setCustomControlPoints(QList<QPointsF> controlPoints);
				// bool calculateControlPointsAutomatically();
				// void setCalculateControlPointsAutomatically();


				private:
				void calculateControlPoints();
				QList<qreal> getFirstControlPoints(QList<qreal> rhs);

				private slots:
				void updateControlPoints();

				private:
				QList<QPointF> m_controlPoints;

				};

				QTCOMMERCIALCHART_END_NAMESPACE

				#endif // QSPLINESERIES_H