1.72.2 Send methods

handler ->event: event

Request to process an event. This method is normally invoked from graphical->event. It will forward handler<-message iff event->is_a succeeds for the argument event using handler<-event and if no handler<-region is specified or the argument event is inside the handler<-region.

handler ->initialise: event=event_id, message=code*, restrict_to=[region]

Create a handler from the event_id mapped, the code it is mapped on and optionally a region to which its activation is limited. For semantics, see handler->event.