I'm usign qwt 6.0.1 with qt 4.7.1.

I modified realtime demo: in the costructor of RandomPlot I added this line:
QwtPlotMagnifier * Magnifier = new QwtPlotMagnifier(canvas());
All works ok with zoomer and magnifier, but when I use mouse wheel to magnify the plot, it doesn't show the scrollbars autoamtically, instead the qwtplotzoomer does.

How do I enable scroll bar appearence with magnifier too?