Question

I have Class1 with a read-only bindable property called age:

public class Class1 {
  private var _age:int;

  [Bindable(event="ageChanged"]
  public function get age():int {
    return this._age;
  }

  public function something():void {
    _age++;
    dispatchEvent(new Event("ageChanged"));
  }
}

I also have Class2 which contains a private instance of Class1. And I want to make property age available from Class1 and still be bindable.

public class Class2 {
  private var c1:Class1 = new Class1();

  [Bindable????]
  public function get age():int {
  }
}

Of course the [Bindable] tag there doesn’t make sense. But how can I achieve the same effect?

I believe I can dispatch some sort of ageChanged event from Class2 up to Class1 and then have an event handler in Class1 dispatch another local ageChanged event to which I bind Class2‘s age property.

But this sounds unnecessarily complicated. Isn’t there a simpler way? 🙂

Thanks!

Answer 1

Personally, I’ve just put my composite class as public and access it from the view if it’s a model (which i think it is). If you don’t want to do that, you can always use BindingUtils:

In the class 2 constructor

var watcher:ChangeWatcher = BindingUtils.bindProperty(this, 'age', c1, 'age');