drilldownchart.cpp Example File

piechartdrilldown/drilldownchart.cpp
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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"