Using swf for source of spark image

Question

Hi, I'm not sure if something changed in flex 4.5.1 but I have a published version of my app from earlier (flex 4.0) that uses a spark image control and I'm able to assign a swf as the source and it displays no problem. I just tried in my newest version and I recieve an error "Error #1034: Type Coercion failed: cannot convert flash.display::MovieClip@e523f91 to flash.display.Bitmap". I'm not trying to access any properties -- just setting '.source = abc.swf'.
Anyone have any idea why I can't assign a swf to an image control anymore?

Answer 1

Yeah, it was harder than I thought it would be.  I got it to display with this subclass of BitmapImage, but I didn’t beat it up so there might be other issues:
package
import flash.display.Sprite;
import flash.display.LoaderInfo;
import spark.core.IGraphicElement;
import spark.core.DisplayObjectSharingMode;
import spark.primitives.BitmapImage;
import mx.events.FlexEvent;
public class MyBitmapImage extends BitmapImage
    private var imageWidth:Number;
    private var imageHeight:Number;
    override protected function measure():void
        super.measure();
        measuredWidth = imageWidth;
        measuredHeight = imageHeight;
    override public function canShareWithPrevious(element:IGraphicElement):Boolean
        return false;
    override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
        super.updateDisplayList(unscaledWidth, unscaledHeight);
    override protected function contentComplete(content:Object):void
        var loaderInfo:LoaderInfo = content as LoaderInfo;
        // For untrusted content we must host the acquired Loader
       // instance directly as our DisplayObject.
       displayObjectSharingMode = DisplayObjectSharingMode.OWNS_UNSHARED_OBJECT;
        invalidateDisplayObjectSharing();
        // Create a content holder to use as our display object.
       var contentHolder:Sprite = new Sprite();
        setDisplayObject(contentHolder);
        contentHolder.addChild(loaderInfo.loader);
        // Retain our source image width and height.
       imageWidth = loaderInfo.width;
        imageHeight = loaderInfo.height ;
        // Update
       if (!explicitHeight || !explicitWidth)
            invalidateSize();
        invalidateDisplayList();
        // Dispatch ready event
       dispatchEvent(new FlexEvent(FlexEvent.READY));