QwtPlotMagnifier Invert Wheel Zoom

Hi,

I included QwtPlotMagnifier to my plot, but scrolling up on the mouse zooms out and scrolling down on the mouse zooms in. How do I switch these so that scrolling up zooms in?

Thank you,
-James

Didn't try it myself, but I guess the following might invert:

Code:

---

virtual YourMagnifier::rescale(double factor)
{
   if ( factor != 0.0 )
       QwtPlotMagnifier::rescale(1 / factor);
}

---

HTH,
Uwe

Quote:

---

Originally Posted by Uwe

Didn't try it myself, but I guess the following might invert:

Code:

---

virtual YourMagnifier::rescale(double factor)
{
   if ( factor != 0.0 )
       QwtPlotMagnifier::rescale(1 / factor);
}

---

HTH,
Uwe

---

Hi Uwe,

Thanks for your solution, I can get by with this implementation in my program.

Just one problem though, now the zoom in/out with the keys are also inverted. I would also have to override setZoomInKey and setZoomOutKey right?

Anyways this will work fine for my application, thanks