Simple multi-touch scroll support

when viewing a VNC share on a touch enabled device, this mod triggers a mouseWheel event to be fired for vertical scrolling.

It is only basic but hopefully someone can help me finish it off?

Only scrolling on the Y axis is currently added
mouseWheel Delta is currently fixed at 10 / -10
Scrolling text currently selects the text

I think this is a valuable functionality to allow touch device users to navigate a shared screen in a more native way, but need help in finishing it off.

Any takers?