How to call constructor in MXML?

Question

Hi
If I have created a custom component in ActionScript that has non-empty constructor, how do I create this component in MXML?

Answer 1

Alternately, if you can provide a default value for all constructor arguments, you *can* declare the component in MXML. E.g.,
     public class MyPanel extends VBox
         public function DummyComp (title:String='untitled')
You can then use
    <mycomps:DummyComp/>
You'll probably also want to expose a property for title so you can set it after it's constructed. Unfortunately, this makes it pretty much impossible to create immutable properties. If you implement IMXMLComponent (or whatever that interface is called), you'll get a callback for the initialize() method once the component's id and parent container, but this can happen before all properties are initialized (!), which makes it a lot less useful.