Environment:      Siren
Superclass:         Association
Category:         Music-Support

An EventAssociation is an Association with some special semantics for Siren. It can be created with the '=>' message to a Number, meaning start-time assicoated with event.

accessing

, anArgument
   Add the argument as a property of the receiver.

event
   Answer the receiver's event (value).

start
   Answer the receiver's start (key).

start: aTime
   Set the receiver's start (key).

stop
   Answer the stop time of the event association.

time
   Answer the receiver's start (key).

printing

printOn: aStream
   Append to the argument, aStream, the two elements of the
   EventAssociation separated by a double-right arrow (=>).

comparing

< anAssociation
   Handle events, associations, and time/order sorting.

= anAssociation
   If the argument's not an association, compare it to the receiver's value, otherwise answer whether the receiver's key and value are both equal to the argument's.

MetaClass:         EventAssociation class