In our previous episode, Michael Van Canneyt said: > >> Observable and Observer go hand in hand. We're talking about both. > >> Specifically, I want to add observable to TPersistent. > > > > People having object frameworks based on that class will really thank you > > for slowing their systems. > > Why would it slow down? > > I'm not adding any calls to it. Just a call and a property which - when used > in a > descendent - may instantiate an auxiliary object. By default, nothing is > called, and therefor there is no speed impact.
How do you detect in an observable that the state changed ? Usually this is done by setting a flag at any write operation to the object. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
