Method drawLegendData

pj_plotting/widget/src/PlotLegend.cpp:67–108

}

void PlotLegend::drawLegendData(
    QPainter* painter, const QwtPlotItem* plot_item, const QwtLegendData& data, const QRectF& rect) const {
  const int item_margin = margin();
  const QRectF item_rect = rect.toRect().adjusted(item_margin, item_margin, -item_margin, -item_margin);
  painter->setClipRect(item_rect, Qt::IntersectClip);

  int title_offset = 0;
  constexpr qreal kDotDiameter = 8.0;
  constexpr qreal kDotGap = 4.0;
  if (const auto* curve = dynamic_cast<const QwtPlotCurve*>(plot_item); curve != nullptr) {
    QColor dot_color = curve->pen().color();
    if (!plot_item->isVisible()) {
      dot_color.setAlphaF(0.45);
    }
    const QRectF dot_rect(item_rect.left(), item_rect.center().y() - (kDotDiameter / 2.0), kDotDiameter, kDotDiameter);
    painter->save();
    painter->setRenderHint(QPainter::Antialiasing, true);
    painter->setPen(Qt::NoPen);
    painter->setBrush(dot_color);
    painter->drawEllipse(dot_rect);
    painter->restore();
    title_offset += static_cast<int>(kDotDiameter + kDotGap);
  } else if (const QwtGraphic graphic = data.icon(); !graphic.isEmpty()) {
    QRectF icon_rect(item_rect.topLeft(), graphic.defaultSize());
    icon_rect.moveCenter(QPoint(icon_rect.center().x(), rect.center().y()));
    if (plot_item->isVisible()) {
      graphic.render(painter, icon_rect, Qt::KeepAspectRatio);
    }
    title_offset += static_cast<int>(icon_rect.width()) + spacing();
  }

  const QwtText text = data.title();
  if (text.isEmpty()) {
    return;
  }

  QPen pen = textPen();
  pen.setColor(plot_item->isVisible() ? parent_plot_->canvas()->palette().windowText().color() : QColor(122, 122, 122));
  painter->setPen(pen);
  painter->setFont(font());
  text.draw(painter, item_rect.adjusted(title_offset, 0, 0, 0));
}

void PlotLegend::drawBackground(QPainter* painter, const QRectF& rect) const {
  painter->save();