Weird Tackpad behaviour on Macbooks

Hello All

I'm sorry if the topic has already been answered... I did'nt find anything.

I develop Desktop apps for both Mac and Windows users and I'd like them to handle scrollable content with mouse-wheel or trackpad (for laptops).

So I use the MouseWheel events and use delta as I learned on tuts some time ago.

It's all fine on both platforms with the mouse-wheel.

The trackpad works just fine on Windows but has unexpected behaviour on Macbooks.

The scrolled content shakes and do not freeze on correct position as I pull my fingers off the trackpad...

Does someone can tell me what it is about ? Do I miss something ? How could this be fixed ?

Thanx to all.

Laurent