Hello Uwe,

Thanks a lot. I found a different way of doing. I install an event filter in my axis and I handle the wheel event.
It works fine for a normal zooming in and out, but I didn't find the right calculation to have it around the mouse pointer.
I have the mouse position and everything I need but I didn't figure out yet how to calculate to have the zoom around the pointer.
Can you help me on that? Do you have an example?

Thanks in advance.
Best Regards.