Actionscript 3 :: Setup Binding Between Locale Class And UI Component?

how to properly setup binding between my Locale class and an mxml file.

My main mxml file contains:

<mx:Button id="TMP" label="{Locale.getLocaleString('title'}"/>

I would like to display an empty string in the button's label until the locale file loads. Once the locale file loads I would like to display what is returned by getLocaleString('title').

I think that this is what Binding is intended for however I think that I am approaching it wrong.

I know that I am not allowed to bind on a function. So do I need to allow access (using a get function) to my _dictionary property? What is the standard way to setup Binding for something like this?

This is my current Locale class.

public class Locale {
private static var _dictionary:Dictionary = new Dictionary();
public static function loadResources():void {...}

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