Method lineWidthFromPixels

pj_plotting/widget/src/PlotWidget.cpp:1311–1328

}

LineWidth PlotWidget::lineWidthFromPixels(double pixels) {
  // Older layouts stored the line width per-curve as a raw pen width, which could be
  // either the rendered lineWidthValue() or the raw toolbar value (lineWidthValue is
  // `scale` times the raw value). Pick the LineWidth closest across both scales,
  // deriving every candidate from lineWidthValue() so the width ladder lives in one place.
  const double scale = lineWidthValue(LineWidth::kPoints10);  // raw == lineWidthValue / scale
  int best = 0;
  double best_dist = std::numeric_limits<double>::max();
  for (int i = static_cast<int>(LineWidth::kPoints10); i <= static_cast<int>(LineWidth::kPoints30); ++i) {
    const double scaled = lineWidthValue(static_cast<LineWidth>(i));
    const double dist = std::min(std::abs(pixels - scaled), std::abs(pixels - scaled / scale));
    if (dist < best_dist) {
      best_dist = dist;
      best = i;
    }
  }
  return static_cast<LineWidth>(best);
}

QString PlotWidget::curveStyleToString(CurveStyle style) {
  switch (style) {