Comments on: Overriding getter/setter methods in AS 2.0

By: Rob Grzywinski

Rob Grzywinski — Thu, 03 May 2007 12:42:55 +0000

To override a getter / setter:

override public function set data(value:Object):void {
…
super.data = value;
}

override public function get data():Object {
…
return super.data;
}

By: brian

brian — Thu, 18 May 2006 11:50:01 +0000

ash’s method will work, but unfortunately it will affect EVERY instance of the same class on the stage, not just the one that is being set.

any other good ideas?

By: Josh

Josh — Fri, 14 Apr 2006 22:32:34 +0000

It’s been my experience that you can’t call a super getter/setter. You can override it but you can’t call the parent version with super. Ash’s method probably works though. It’s good to know.

By: felix

felix — Fri, 14 Apr 2006 17:08:19 +0000

thanks for your comments…makes sense now…

By: Ash

Ash — Fri, 14 Apr 2006 16:48:56 +0000

This is the aforementioned hackery..

It accesses the prototypes directly rather than using super.

public function get enabled():Boolean {
return this.__proto__.__proto__.enabled;
}

public function set enabled(mode:Boolean):Void {
trace(mode);
this.__proto__.__proto__.enabled = mode;
this.gotoAndStop(mode ? “up” : “disabled”);
}

By: JesterXL

JesterXL — Fri, 14 Apr 2006 16:24:25 +0000

enabled is basically marked as “final”; it gets confused because the getter/setter name is the same as the base property.

The solution is to use a watcher instead. It’s heavier, but it works. Look at how it’s done via mx.core.UIComponent (Flash MX 2004 or 8).

By: Ash

Ash — Fri, 14 Apr 2006 16:15:41 +0000

I think its because enabled is treated as a property, and you can’t set properties of a superclass (its a prototype, not an instance).

I don’t know if its possible without some sneaky hackery.

By: flashape

flashape — Fri, 14 Apr 2006 16:06:50 +0000

wierd…i tried out and couldnt get it working. tried it with _visible to, same thing.