Actually my definition of a mixin is very strict compared to a decorator; it
uses design by contract, composition and declares type:
Class ClassA implements IClassB, IClassC
{
private var classB:ClassB;
private var classC:ClassC;
private function classBMethod():Boolean{...};
private function classCMethod():Number{...};
}
-erik
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of T. Michael
Keesey
Sent: Tuesday, January 30, 2007 12:09 AM
To: Flashcoders mailing list
Subject: Re: [Flashcoders] Flair Pattern bad mixins good (?)
On 1/29/07, David Ham <[EMAIL PROTECTED]> wrote:
>
> startObjectDrag triggered by obj_mc.onPress
> checkForSnap triggered by setInterval or onEnterFrame type of event,
> in this case onObjectDrag
> stopObjectDrag triggered by obj_mc.onRelease
This looks more like the Broadcaster pattern or the Event Dispatcher
(a.k.a. Observer) pattern than Decorator.
(Also, it might be better to tie checkForSnap to mouseMove.)
Personally, I'm not a big fan of mix-ins because, well, they're kind
of sloppy. They involve tinkering with stuff that should be off-limits
(and is in AS3, I think). Using mix-ins, you could accidentally use a
non-function as a function. That can't happen if you stick to
strictly-typed programming.
--
T. Michael Keesey
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