[xinf] DOM Events?
Nicolas Cannasse
ncannasse at motion-twin.com
Thu Jun 22 20:10:22 CEST 2006
> * uses Strings as event type identifiers, defined as static variables in the corresponding classes (like MouseEvent.MOUSE_DOWN, but Event.ENTER_FRAME).
bad bad bad :)
> * DOM events use an EventListener object like this:
> interface EventListener {
> function handleEvent( evt:Event ) :Void;
> }
> while AS3 uses functions as first-class objects, like:
> function(evt:Event):void
I prefer the AS3 way, but the problem is that with current haXe version,
two delegates created doesn't have the same address.
> this way, you could do:
> public function onMouseDown( e:MouseEvent ) :Void {
> ...
> }
> ...
> addEventListener( MouseEvent.MOUSE_DOWN, new CastingEventListener<MouseEvent>( onMouseDown ) );
By using a signature of EventListener and no type constraint for the
CastingEventListener, you can use type inference so you don't have to
specify the type parameter.
Here's my take on the subject. I add an EventSite class that permit to
remove the need for a type String, and still is very natural to handle.
Nicolas
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