look at velocity first to see if closing or opening
make sure menu are measured correctly
sometimes if the animation with from=to, the listener is not called :s
useful isInteracting method
method to call setMeasuredDimension
cleanup
why the MIN_FLING_VELOCITY_FACTOR factor?
if click on the contentView while opened then close
better handle of findDownView with WrapperView. Dont allow swipe menu if "on" header
prevent division by 0
needs to be called with real values