drilldownchart.cpp Example File

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  #include "drilldownchart.h"
  #include "drilldownslice.h"

  QT_CHARTS_USE_NAMESPACE

  DrilldownChart::DrilldownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
      : QChart(QChart::ChartTypeCartesian, parent, wFlags),
        m_currentSeries(0)
  {

  }

  DrilldownChart::~DrilldownChart()
  {

  }

  void DrilldownChart::changeSeries(QAbstractSeries *series)
  {
      // NOTE: if the series is owned by the chart it will be deleted
      // here the "window" owns the series...
      if (m_currentSeries)
          removeSeries(m_currentSeries);
      m_currentSeries = series;
      addSeries(series);
      setTitle(series->name());
  }

  void DrilldownChart::handleSliceClicked(QPieSlice *slice)
  {
      DrilldownSlice *drilldownSlice = static_cast<DrilldownSlice *>(slice);
      changeSeries(drilldownSlice->drilldownSeries());
  }

  #include "moc_drilldownchart.cpp"