QwtSeriesData and boundingRect()

I was trying to use the QwtSeriesData (Qwt6.0.2) and found some confusion with boundingRect().
I have a data like below

Code:

---

class MyData : public QwtSeriesData<QPointF>
{
public:
    virtual size_t size() const
    {
        return 200;
    }
    virtual QPointF sample( size_t i ) const
    {
        QPointF point(i*10,i%2 ? 300 : 500);
        return point;
    }
    virtual QRectF boundingRect() const
    {
       QRectF r =  qwtBoundingRect(*this); //<--this produce left image
       //QRectF r(0,0,2000,1000); <-- this produced right image
       return r;
    }
};

---

Attachment 7255Attachment 7256

It seems like the boundingRect is giving some scale factor to the real data. Is this a bug? by the way I set the QwtPlot to be autoscaling.

baray98

I doubt, that the left image is from the code you have posted.

Uwe

aha i found my woes...I have set QwtCurve::setYAxis(QwtPlot::yRight)...but it was not enabled.

Thanks uwe for your time