calling invalidateProperties and invalidateDisplayList in UIComponent renderer

Question

Hi All

I am working on a UIcomponent based item renderer and am getting some odd behaviour.

In my set data function I call invalidateProperties and invalidateDisplayList. I then get updateDisplayList being called before commitProperties and updateDisplayList is not then called again.

I was under the belief that commitProperties was always suppsoed to get called first in the lifecycle.

I suppose that I can just call invalidateProperties in the set data then call invalidateDisplayList in the commitProperties call but this doesn't seem quite right.

My code:

    override public function set data( value : Object ) : void
    {
        if( data == value )return;

        super.data = value;

        _assetUpdate = true;


        var factory : DisplayObjectFactory = data as DisplayObjectFactory;
        var name : String = factory ? factory.displayName : "";

        trace( "set data: " + name );

        invalidateProperties();
        invalidateDisplayList();
    }

    override protected function measure():void
    {
        measuredWidth = 300;
        measuredHeight = 200;
    }

    override protected function commitProperties() : void
    {
        super.commitProperties();

        if( _assetUpdate )
        {
            removeAsset();

            var factory : DisplayObjectFactory = data as DisplayObjectFactory;

            _txtClassName.text = factory ? factory.displayName : null;
            toolTip = factory ? factory.swcFileName : null;

            trace( "setting text: " + _txtClassName.text );

            if( factory )
            {
                _asset = factory.newInstance();

                addChild( _asset );

                trace( "setting asset: " + getQualifiedClassName( _asset ) );
            }

            _assetUpdate = false;
        }
    }

    override protected function updateDisplayList( 
        w : Number, 
        h : Number 
    ) : void
    {
        super.updateDisplayList( w, h );

        if( w == 0 || h == 0 )return;

        _txtClassName.width = w - padding*2;
        _txtClassName.height = _txtClassName.measuredHeight;

        _txtClassName.x = padding;
        _txtClassName.y = h - ( _txtClassName.height + padding );

        if( _asset )
        {
            var assetBounds : Rectangle = new Rectangle(
                padding, 
                padding,
                w - padding*2,
                h - ( padding*2 ) - _txtClassName.height
            );

            trace( "ClassRenderer updateDisplayList: " + w + " : " + h + " : " + assetBounds + " : " + _txtClassName.text );

            AssetHelper.positionAsset( _asset, assetBounds );
        }

        graphics.clear();
        graphics.beginFill( 0xFFFFFF, 1 );
        graphics.drawRect( 0, 0, w, h );
    }