How to set the selected radio-button in a XMLUI radiogroup?

Question

In some examples on the web (http://ajarproductions.com/blog/2011/03/03/creating-flash-extensions-pt-4-ui/) there is "fake" demonstration that claims that this works:

<!-- ... somewhere inside the XMLUI dialog file ... -->
<radiogroup id="myFileExtension">
  <radio value=".json" label=".json" selected="true" />
  <radio value=".txt" label=".txt" />
  <radio value=".xml" label=".xml" />
</radiogroup>

But... selected="true" doesn't do jack!

The radiogroup always selects the first item regardless of which has the selected attribute.

Is there any XMLUI experts out there that knows another parameter that is actually supported to assign the default Radio button?

I am basically trying to open a dynamic XMLUI dialog and the JSFL script must be able to set the default selection based on the last settings used (which I store in a JSON document elsewhere).

Answer 1

The easiest way out be to create an init() method onCreationComplete.. then simply set the radio button to selected via actionscript instead of explicity within the mxml code.

<mx:RadioButtonGroup id="group"/>
        <mx:RadioButton groupName="group" id="button1" value="false"
                        label="first button"/>
        <mx:RadioButton groupName="group" id="button2" value="true"
                        label="second button"/>


public function onInit() {
     button2.selected = true;
}