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.
second GdkEvent
return location for the relative angle between both events. out
TRUE if the angle could be calculated. Since 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.