QwtPlotCurve color for connecting lines

[orignihn]

I'm trying to draw various styles for a QwtPlotCurve, and the only color I get is black. I can make the symbols whatever color I choose, but the symbol color isn't changing the connecting lines.

... // m_graphics is a QwtPlotCurve*
 
	int curve_style = get_curve_style();
	int symbol_style = get_symbol_style();
	int pen_style = get_pen_style();
	QColor c = get_color();
 
	m_graphics->setStyle(static_cast<QwtPlotCurve::CurveStyle>(curve_style));
	m_graphics->setPaintAttribute(QwtPlotCurve::PaintFiltered);
 
	QwtSymbol symbol;
	QPen p;
	QBrush b;
	b.setStyle(Qt::SolidPattern);
	b.setColor(c);
 
	p.setStyle(static_cast<Qt::PenStyle>(pen_style));
	p.setColor(c);
 
	symbol.setBrush(b);
	symbol.setPen(p);
	symbol.setSize(QSize(5,5));
	symbol.setStyle(static_cast<QwtSymbol::Style>(symbol_style));
 
	m_graphics->setSymbol(symbol);

... // m_graphics is a QwtPlotCurve*

	int curve_style = get_curve_style();
	int symbol_style = get_symbol_style();
	int pen_style = get_pen_style();
	QColor c = get_color();

	m_graphics->setStyle(static_cast<QwtPlotCurve::CurveStyle>(curve_style));
	m_graphics->setPaintAttribute(QwtPlotCurve::PaintFiltered);

	QwtSymbol symbol;
	QPen p;
	QBrush b;
	b.setStyle(Qt::SolidPattern);
	b.setColor(c);

	p.setStyle(static_cast<Qt::PenStyle>(pen_style));
	p.setColor(c);

	symbol.setBrush(b);
	symbol.setPen(p);
	symbol.setSize(QSize(5,5));
	symbol.setStyle(static_cast<QwtSymbol::Style>(symbol_style));

	m_graphics->setSymbol(symbol);

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m_graphics is later used by calling setRawData() and then draw(int, int). I'm using Qwt 5.2.1.

Why doesn't the color "c" get used for the lines connecting the symbols?

Thanks,
Tom

[Uwe]

Use QwtPlotCurve::setPen(), see: http://qwt.sourceforge.net/class_qwt...9d1e485d2d0c4d

Uwe