Qt 5.9 | Qt Charts | Piechart Drilldown Example | drilldownslice.cpp Example File

Qt 5.9.9 Reference Documentation

# drilldownslice.cpp Example File

piechartdrilldown/drilldownslice.cpp

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      ** This file is part of the Qt Charts module of the Qt Toolkit.
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      #include "drilldownslice.h"

      QT_CHARTS_USE_NAMESPACE

      DrilldownSlice::DrilldownSlice(qreal value, QString prefix, QAbstractSeries *drilldownSeries)
          : m_drilldownSeries(drilldownSeries),
            m_prefix(prefix)
      {
          setValue(value);
          updateLabel();
          setLabelFont(QFont("Arial", 8));
          connect(this, &DrilldownSlice::percentageChanged, this, &DrilldownSlice::updateLabel);
          connect(this, &DrilldownSlice::hovered, this, &DrilldownSlice::showHighlight);
      }

      DrilldownSlice::~DrilldownSlice()
      {

      }

      QAbstractSeries *DrilldownSlice::drilldownSeries() const
      {
          return m_drilldownSeries;
      }

      void DrilldownSlice::updateLabel()
      {
          QString label = m_prefix;
          label += " $";
          label += QString::number(this->value());
          label += ", ";
          label += QString::number(this->percentage() * 100, 'f', 1);
          label += "%";
          setLabel(label);
      }

      void DrilldownSlice::showHighlight(bool show)
      {
          setLabelVisible(show);
          setExploded(show);
      }

      #include "moc_drilldownslice.cpp"