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.
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.