Question

Can I disable a Spark Button Bar Button via an index value or do I have to do it through the buttons skin as shown here using the label.

and example of what I would like to do:

public function disableButton(index:uint):void
{
    var button:ButtonBarButton = this.getChildAt(index) as ButtonBarButton;

    button.enabled = false;


}

This does not work as the button object comes back null.

Answer 1

The code you want is:

public function disableButton(index:int):void
{
    // Bounds check
    if (index < 0 || index >= this.dataGroup.numElements) return;

    var btn:ButtonBarButton = this.dataGroup.getElementAt(index) as ButtonBarButton;
    if (btn)
    {
        btn.enabled = false;
    }
}

Here is a complete working example.