Method setStyle

pj_plotting/widget/src/PlotWidgetBase.cpp:545–583

}

void PlotWidgetBase::setStyle(QwtPlotCurve* curve, CurveStyle style) {
  const double width = style == kDots ? dotWidthValue(lineWidth()) : lineWidthValue(lineWidth());
  curve->setPen(curve->pen().color(), width);

  // Qwt's QwtPlotCurve::LinesAndDots style on its own does not draw visible
  // dots at the pen widths we use (1.4-4.2 px); attach an explicit symbol so
  // each sample is rendered as a small filled circle. Cleared for plain Lines.
  switch (style) {
    case kLines:
      curve->setStyle(QwtPlotCurve::Lines);
      curve->setSymbol(nullptr);
      break;
    case kLinesAndDots: {
      curve->setStyle(QwtPlotCurve::Lines);
      const QColor color = curve->pen().color();
      const int dot_size = static_cast<int>(std::round(dotWidthValue(lineWidth())));
      curve->setSymbol(new QwtSymbol(QwtSymbol::Ellipse, color, QPen(color), QSize(dot_size, dot_size)));
      break;
    }
    case kDots:
      curve->setStyle(QwtPlotCurve::Dots);
      curve->setSymbol(nullptr);
      break;
    case kSticks:
      curve->setStyle(QwtPlotCurve::Sticks);
      curve->setSymbol(nullptr);
      break;
    case kSteps:
      curve->setStyle(QwtPlotCurve::Steps);
      curve->setCurveAttribute(QwtPlotCurve::Inverted, false);
      curve->setSymbol(nullptr);
      break;
    case kStepsInverted:
      curve->setStyle(QwtPlotCurve::Steps);
      curve->setCurveAttribute(QwtPlotCurve::Inverted, true);
      curve->setSymbol(nullptr);
      break;
  }
}

QColor PlotWidgetBase::nextColor() {
  return colorFromIndex(next_color_index_++);