Qt 5.7 | Qt Charts | StackedBarChart Drilldown Example | drilldownchart.cpp Example File

Qt 5.7.1 Reference Documentation

# drilldownchart.cpp Example File

stackedbarchartdrilldown/drilldownchart.cpp

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      #include "drilldownchart.h"
      #include <QtCharts/QBarCategoryAxis>

      QT_CHARTS_USE_NAMESPACE

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

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

          m_currentSeries = series;

          // Reset axis
          QBarCategoryAxis *axis = new QBarCategoryAxis();
          axis->append(m_currentSeries->categories());

          addSeries(series);

          createDefaultAxes();
          setAxisX(axis, series);
          axisY()->setTitleText("Crops");

          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"