drilldownchart.h Example File

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  #ifndef DRILLDOWNCHART_H
  #define DRILLDOWNCHART_H

  #include <QtCharts/QChart>

  QT_CHARTS_BEGIN_NAMESPACE
  class QAbstractSeries;
  class QPieSlice;
  QT_CHARTS_END_NAMESPACE

  QT_CHARTS_USE_NAMESPACE

  class DrilldownChart : public QChart
  {
      Q_OBJECT
  public:
      explicit DrilldownChart(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);
      ~DrilldownChart();
      void changeSeries(QAbstractSeries *series);

  public Q_SLOTS:
      void handleSliceClicked(QPieSlice *slice);

  private:
      QAbstractSeries *m_currentSeries;
  };

  #endif // DRILLDOWNCHART_H