Method drawPolyline

qCC/extern/QCustomPlot/qcustomplot.cpp:35225–35268

}

void QCPPolarGraph::drawPolyline(QCPPainter *painter, const QVector<QPointF> &lineData) const
{
  // if drawing solid line and not in PDF, use much faster line drawing instead of polyline:
  if (mParentPlot->plottingHints().testFlag(QCP::phFastPolylines) &&
      painter->pen().style() == Qt::SolidLine &&
      !painter->modes().testFlag(QCPPainter::pmVectorized) &&
      !painter->modes().testFlag(QCPPainter::pmNoCaching))
  {
    int i = 0;
    bool lastIsNan = false;
    const int lineDataSize = lineData.size();
    while (i < lineDataSize && (qIsNaN(lineData.at(i).y()) || qIsNaN(lineData.at(i).x()))) // make sure first point is not NaN
      ++i;
    ++i; // because drawing works in 1 point retrospect
    while (i < lineDataSize)
    {
      if (!qIsNaN(lineData.at(i).y()) && !qIsNaN(lineData.at(i).x())) // NaNs create a gap in the line
      {
        if (!lastIsNan)
          painter->drawLine(lineData.at(i-1), lineData.at(i));
        else
          lastIsNan = false;
      } else
        lastIsNan = true;
      ++i;
    }
  } else
  {
    int segmentStart = 0;
    int i = 0;
    const int lineDataSize = lineData.size();
    while (i < lineDataSize)
    {
      if (qIsNaN(lineData.at(i).y()) || qIsNaN(lineData.at(i).x()) || qIsInf(lineData.at(i).y())) // NaNs create a gap in the line. Also filter Infs which make drawPolyline block
      {
        painter->drawPolyline(lineData.constData()+segmentStart, i-segmentStart); // i, because we don't want to include the current NaN point
        segmentStart = i+1;
      }
      ++i;
    }
    // draw last segment:
    painter->drawPolyline(lineData.constData()+segmentStart, lineDataSize-segmentStart);
  }
}

void QCPPolarGraph::getVisibleDataBounds(QCPGraphDataContainer::const_iterator &begin, QCPGraphDataContainer::const_iterator &end, const QCPDataRange &rangeRestriction) const
{