If both events contain X/Y information, this function will return %TRUE and return in @angle the relative angle from @event1 to @event2. The rotation direction for positive angles is from the positive X axis towards the positive Y axis.
first #GdkEvent
second #GdkEvent
return location for the relative angle between both events
%TRUE if the angle could be calculated.
3.0
See Implementation
If both events contain X/Y information, this function will return %TRUE and return in @angle the relative angle from @event1 to @event2. The rotation direction for positive angles is from the positive X axis towards the positive Y axis.