how to use QwtplotCurve::fillcurve Fill area above baseline and below the curve

[ConfaMiky]

Hi all,
I try to fill the curve below and over the baseline with different color. I try to use the code that I found here and for clipping different regions it's ok.
But I'm not been able to fill it with different color could someone help me. I try with setBrush(...) but nothing happen.
Thanks miky.

void Curve::fillCurve(QPainter *painter,
                      const QwtScaleMap &xMap, const QwtScaleMap &yMap,
                      const QRectF & canvasRect, QPolygonF & polygon) const
{
    painter->save();
    QBrush *brush1 = new QBrush (Qt::green, Qt::SolidPattern);
    painter->setBrush(*brush1);
    painter->setClipRect(0,yMap.transform(baseline()),1000,1000,
                         Qt::ReplaceClip);
//    QwtPlotCurve::fillCurve(painter, xMap, yMap, canvasRect, polygon);
 
    painter->setClipRect(0,0,1000,yMap.transform(baseline()),
                         Qt::ReplaceClip);
    QwtPlotCurve::fillCurve(painter, xMap, yMap, canvasRect, polygon);
    painter->restore();
 
}

void Curve::fillCurve(QPainter *painter,
                      const QwtScaleMap &xMap, const QwtScaleMap &yMap,
                      const QRectF & canvasRect, QPolygonF & polygon) const
{
    painter->save();
    QBrush *brush1 = new QBrush (Qt::green, Qt::SolidPattern);
    painter->setBrush(*brush1);
    painter->setClipRect(0,yMap.transform(baseline()),1000,1000,
                         Qt::ReplaceClip);
//    QwtPlotCurve::fillCurve(painter, xMap, yMap, canvasRect, polygon);

    painter->setClipRect(0,0,1000,yMap.transform(baseline()),
                         Qt::ReplaceClip);
    QwtPlotCurve::fillCurve(painter, xMap, yMap, canvasRect, polygon);
    painter->restore();

}

To copy to clipboard, switch view to plain text mode