i added wary important param to EventTouch now you can get information on all active touches. It's very useful for multitouch support, you don't need need store all touches inside you control you just can take it from second param.
it is like UIEvent in iPhone sdk 
– allTouches
https://developer.apple.com/library/ios/documentation/uikit/reference/UIEvent_Class/Reference/Reference.html
if you don't change it to EventTouch you need additional dinamic_cast it to EventTouch