[Interest] QtCharts restricted zoom behaviour

[aj at elane2k.com]

Hi im experimenting with the zoomIn and zoomOut functions in QtCharts.

Is it possible to restrict both zoomIn and zoomOut to a specified 
max/min zoom?

E.g. i dont want to let the user zoom out beyond my values so that the 
smallest and highest value is always left/rightmost in the viewport. 
Same with zooming in - at some point it doesnt make sense to zoom in any 
more.

I tried the axisX/Y()->setMin/Max() functions but these dont seem to 
restrict zoom to this values. Any other Ideas?

Regards,
A. Jäkel