datasource.h Example File

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  #ifndef DATASOURCE_H
  #define DATASOURCE_H

  #include <QtCore/QObject>
  #include <QtCharts/QXYSeries>
  #include <QtWidgets/QLabel>
  #include <QtCore/QElapsedTimer>
  #include <QtCore/QTimer>

  QT_CHARTS_USE_NAMESPACE

  class DataSource : public QObject
  {
      Q_OBJECT
  public:
      explicit DataSource(QObject *parent = 0);

      void startUpdates(const QList<QXYSeries *> &seriesList, QLabel *fpsLabel);

  public slots:
      void generateData(int seriesCount, int rowCount, int colCount);
      void update(QAbstractSeries *series, int seriesIndex);
      void handleSceneChanged();
      void updateAllSeries();

  private:
      QVector<QVector<QVector<QPointF> > > m_data;
      int m_index;
      QList<QXYSeries *> m_seriesList;
      QLabel *m_fpsLabel;
      QElapsedTimer m_fpsTimer;
      QTimer m_dataUpdater;
  };

  #endif // DATASOURCE_H