Zoomer with scrollbar for multiple YLeft and YRight axes

Hi,

I use qwt multiple axis branch and I implemented ScrollBar when zooming (from realtime example).
This works nice with one YAxis.

I saw propositions to use each zoomer for each YAxis but I don't think that this is a good idea beacause of ScrollBars and secondly beacause of I need fast reploting after zooming. I suppose that if I use multiple zoomers then the plot does multiple replots.

I'm looking for a way to modify QwtPlotZoomer code to allow this zoomer to zoom along each visible axis.
Maybe somebody could give me some hints?

By the way, I can't make make it work with two YLeft axis and two zommers.
Here I have two curves: one attached to QwtAxisId(QwtPlot::yLeft, 0) and another QwtAxisId(QwtPlot::yLeft, 1)

Code:

---

QwtPlotZoomer* zoomer0 = new QwtPlotZoomer( QwtAxis::xBottom,  QwtAxisId(QwtAxis::yLeft, 0).id, d_plot->canvas() );
    zoomer0->setMousePattern( QwtEventPattern::MouseSelect3,
        Qt::RightButton );
 
    QwtPlotZoomer* zoomer1 = new QwtPlotZoomer( QwtAxis::xBottom, QwtAxisId(QwtAxis::yLeft, 1).id, d_plot->canvas() );
    zoomer1->setMousePattern( QwtEventPattern::MouseSelect3,
        Qt::RightButton );

---

I have not found any way to zoom the very YLeft axis (QwtAxisId(QwtAxis::yLeft, 1)). Only one YAxis is zoomed (QwtAxisId(QwtAxis::yLeft, 0))
See picture
Attachment 13518