Method recalcShapeAndBoundingRect

src/backend/worksheet/plots/cartesian/Histogram.cpp:1461–1491

! recalculates the outer bounds and the shape of the curve. */

  recalculates the outer bounds and the shape of the curve.
  */
void HistogramPrivate::recalcShapeAndBoundingRect() {
	if (suppressRecalc)
		return;

	prepareGeometryChange();
	m_shape = QPainterPath();
	if (line->histogramLineType() != Histogram::NoLine)
		m_shape.addPath(WorksheetElement::shapeFromPath(linePath, line->pen()));

	if (symbol->style() != Symbol::Style::NoSymbols)
		m_shape.addPath(symbolsPath);

	if (value->type() != Value::NoValues)
		m_shape.addPath(valuesPath);

	if (errorBar->yErrorType() != ErrorBar::ErrorType::NoError)
		m_shape.addPath(WorksheetElement::shapeFromPath(errorBarsPath, errorBar->line()->pen()));

	m_shape.addPath(rugPath);
	m_shape.addPolygon(fillPolygon);

	m_boundingRectangle = m_shape.boundingRect();
	m_boundingRectangle = m_boundingRectangle.united(fillPolygon.boundingRect());

	// TODO: when the selection is painted, line intersections are visible.
	// simplified() removes those artifacts but is horrible slow for curves with large number of points.
	// search for an alternative.
	// m_shape = m_shape.simplified();

	updatePixmap();
}

void HistogramPrivate::draw(QPainter* painter) {
	PERFTRACE(name() + QLatin1String(Q_FUNC_INFO));