setZoomBase() of QwtPlotZoomer with value of autoReplot scale of QwtPlot

[npatil15]

As we know, if we set setAxisAutoScale(QwtPlot::xBottom, true);, then X-axis plot will be autoscale as per the input curves. so now practically my zoomBase should be the current/updated scale interval of x and y axis, not the QRectF(0,0 1000x1000). So my intention is to do like this below, which is not the correct syntax.

class ZoomPlot: public QwtPlotZoomer
{
private:
    virtual void rescale() override;
    QwtPlot *m_plot;
}
 
ZoomPlot::ZoomPlot(QwtPlot *plot):
    QwtPlotZoomer(plot->canvas())
{
    m_plot = plot;
}
 
 
void ZoomPlot::rescale()
{
   if(zoomRectIndex() == 0)
   {
        setZoomBase(m_plot->axisInterval(QwtPlot::xBottom)) //Its not correct, so looking for correct syntax
   }
 QwtPlotZoomer::rescale();
}

class ZoomPlot: public QwtPlotZoomer
{
private:
    virtual void rescale() override;
    QwtPlot *m_plot;
}

ZoomPlot::ZoomPlot(QwtPlot *plot):
    QwtPlotZoomer(plot->canvas())
{
    m_plot = plot;
}


void ZoomPlot::rescale()
{
   if(zoomRectIndex() == 0)
   {
        setZoomBase(m_plot->axisInterval(QwtPlot::xBottom)) //Its not correct, so looking for correct syntax
   }
 QwtPlotZoomer::rescale();
}

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