Curve color and legend identifier color are not consistent

Hello,

I have a probleme with colors of my curves and the legend identifiers. The color of legend identifier seems to be a composition with the backgroud color of the QwtLegendWidget.
Is it a bad use of QWT or a bug ?
Do you see a workaround ?

Thanks

(Using Qt 4.7 and qwt 6.0.1)

See the used code to create the plot (simplified):

Code:

---

_plot = new QwtPlot();
 
QwtLegend* legend = new QwtLegend;
legend->setFrameStyle(QFrame::Box|QFrame::Sunken);
_plot->insertLegend(legend, QwtPlot::BottomLegend);

---

See the used code to create curves (simplified) :

Code:

---

QwtPlotCurve* curve = new QwtPlotCurve(QString(resultName.c_str()));
QwtPointSeriesData* seriesData = new QwtPointSeriesData(pointsList);
curve->setData(seriesData);
curve->setAxes(QwtPlot::xBottom,getOrdinateId());
 
QPen pen;
pen.setColor(colorToUse);
pen.setWidth(2);
curve->setPen(pen);
curve->attach(plot);

---

If I change the line 459 of qwt_plot_item.cpp file, colors are consistent
Original line:

Code:

---

identifier.fill( Qt::transparent );

---

Modified line:

Code:

---

identifier.fill(); // (default value Qt::white)

---

See attached screenshot (without QWT modification)
Attachment 7612

See attached screenshot (with QWT modification)
Attachment 7613

oops, the two screenshots are inverted...
The first (plot_1.jpeg) is WITH QWT modification => The expected behaviour.
And the second is my problem (WITHOUT QWT modification)

Please post a small and compilable demo I can check on my system.

Uwe

I have the same problem
Attachment 10011