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 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_plot_curve.html#a08328abaf2c3b67e479d1e4 85d2d0c4d

Uwe