replot in Qwt Zoomer

Hellow!, i have this code:

QwtPlotZoomer* zoomer = new QwtPlotZoomer( canvas(),true);
zoomer->setRubberBandPen( QColor( Qt::black ) );
zoomer->setTrackerPen( QColor( Qt::black ) );
zoomer->setMousePattern( QwtEventPattern::MouseSelect2,
Qt::RightButton, Qt::ControlModifier );
zoomer->setMousePattern( QwtEventPattern::MouseSelect3,
Qt::RightButton );
this->setAutoReplot(true);
replot();

In first i have this, because i called replot():
Attachment 6863
But if i pressed right mouse button or select some areas and back to start area by right mouse button, i get that:
Attachment 6864
I try use it:
zoomer->setZoomBase(this->rect());

plot->setAutoReplot(true);

connect(zoomer, SIGNAL(zoomed(const QRectF&)), this, SLOT(replot()));

But nothing is working
In advance many thanks for your help!

Try to understand, when your axes get initialized like we can see them in your first screenshot. Than take care, that your zoomer gets initialized with these ranges.

Quote:

---

zoomer->setZoomBase(this->rect());

---

Calling setZoomBase without parameter initializes the zoomer with the current scale ranges ( this->rect() is wrong, because it is something else in widget coordinates ).

Uwe

Thank you for your help!