on
Responds to scaling events for a gesture in progress. Reported by pointer motion.
Return
Whether or not the detector should consider this event as handled. If an event was not handled, the detector will continue to accumulate movement until an event is handled. This can be useful if an application, for example, only wants to update scaling factors if the change is greater than 0.01.
Parameters
detector
The detector reporting the event - use this to retrieve extended info about event state.