drilldownchart.cpp Example File

stackedbarchartdrilldown/drilldownchart.cpp
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 #include "drilldownchart.h"
 #include <QtCharts/QBarCategoryAxis>
 #include <QtCharts/QValueAxis>

 QT_CHARTS_USE_NAMESPACE

 DrilldownChart::DrilldownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
     : QChart(QChart::ChartTypeCartesian, parent, wFlags),
       m_currentSeries(0),
       m_axisX(new QBarCategoryAxis()),
       m_axisY(new QValueAxis())
 {
       addAxis(m_axisY, Qt::AlignLeft);
       addAxis(m_axisX, Qt::AlignBottom);
 }

 void DrilldownChart::changeSeries(DrilldownBarSeries *series)
 {
     if (m_currentSeries)
         removeSeries(m_currentSeries);

     m_currentSeries = series;

     // Reset axis
     m_axisX->setCategories(m_currentSeries->categories());
     addSeries(series);
     series->attachAxis(m_axisX);
     series->attachAxis(m_axisY);
     m_axisY->setRange(0,m_currentSeries->maxValue());
     setTitle(series->name());
 }

 void DrilldownChart::handleClicked(int index, QBarSet *barset)
 {
     Q_UNUSED(barset)
     DrilldownBarSeries *series = static_cast<DrilldownBarSeries *>(sender());
     changeSeries(series->drilldownSeries(index));
 }

 #include "moc_drilldownchart.cpp"