If both events have X/Y information, the distance between both coordinates (as in a straight line going from @event1 to @event2) will be returned.
first #GdkEvent
second #GdkEvent
return location for the distance
%TRUE if the distance could be calculated.
3.0
See Implementation
If both events have X/Y information, the distance between both coordinates (as in a straight line going from @event1 to @event2) will be returned.