1.72.1 Instance variables

handler <- event: event_id

event<-id of the events this handler is sensitive to. When an event arrives, it is tested using event->is_a, given the value of this variable.

handler <-> message: code*

Code executed when the handler fires. Arguments:

@receiver	event<-master (normally event<-receiver).
@arg1	The event.

handler <-> region: [region]

Region of graphical the event must be in. See class region for details. Used infrequently.