Method LineRenderable

src/core/renderables/renderable_implementation.cpp:150–276

// ### LineRenderable ###

LineRenderable::LineRenderable(const LineSymbol* symbol, const VirtualPath& virtual_path, bool closed)
 : Renderable(symbol->getColor())
 , line_width(0.001 * symbol->getLineWidth())
{
	Q_ASSERT(virtual_path.size() >= 2);
	
	qreal half_line_width = (color_priority < 0) ? 0 : line_width/2;
	
	switch (symbol->getCapStyle())
	{
		case LineSymbol::FlatCap:		cap_style = Qt::FlatCap;	break;
		case LineSymbol::RoundCap:		cap_style = Qt::RoundCap;	break;
		case LineSymbol::SquareCap:		cap_style = Qt::SquareCap;	break;
		case LineSymbol::PointedCap:	cap_style = Qt::FlatCap;	break;
	}
	switch (symbol->getJoinStyle())
	{
		case LineSymbol::BevelJoin:		join_style = Qt::BevelJoin;	break;
		case LineSymbol::MiterJoin:		join_style = Qt::MiterJoin;	break;
		case LineSymbol::RoundJoin:		join_style = Qt::RoundJoin;	break;
	}
	
	auto& flags  = virtual_path.coords.flags;
	auto& coords = virtual_path.coords;
	
	bool has_curve = false;
	bool hole = false;
	QPainterPath first_subpath;
	
	auto i = virtual_path.first_index;
	bool gap = flags[i].isGapPoint();  // Line may start with a gap
	path.moveTo(coords[i]);
	extent = QRectF(coords[i].x(), coords[i].y(), 0.0001, 0.0001);
	extentIncludeCap(i, half_line_width, false, symbol, virtual_path);
	
	for (++i; i <= virtual_path.last_index; ++i)
	{
		if (gap)
		{
			if (flags[i].isHolePoint())
			{
				gap = false;
				hole = true;
			}
			else if (flags[i].isGapPoint())
			{
				gap = false;
				if (first_subpath.isEmpty() && closed)
				{
					first_subpath = path;
					path = QPainterPath();
				}
				path.moveTo(coords[i]);
				extentIncludeCap(i, half_line_width, false, symbol, virtual_path);
			}
			continue;
		}