How do you self-referenciate a component in MXML when calling ad AS inline function?


Code:
<mx:Script>
function fadeIn(canvas:Canvas)
{
    trace(canvas);
}
</mx:Script>
<mx:Canvas show="fadeIn(this)"></mx:Canvas>
The previous code will throw an error, because "this" is a reference to the root of the MXML document, which is in my case the Application.

Is there any way to quickly pass a self reference? Or do I have to pass an ID and look for the corresponding object from within the function?