Actionscript 3 :: Resizing A Sprite Without Resizing Its BitmapFill (or Its Contents For That Matter)?

I am not simply trying to contain things and have the container resize without the contents resizing. I would just use a simple MovieClip for that.. My main focus is on the use of BitmapFill. I'm trying to make a repeating background image for a container; thus far I'm able to draw my BitmapFill sprite to the size I want. (Which is the stage's height) but when the stage is resized, I want to re-size my container but have my containers BitmapFill crop or add more as the window is resized bigger or smaller. Allow me to illustrate what I mean:

I've got a simple rectangle sprite that fills with a bitmap from the library and a simple resize handler function that detects when the window has been resized.what I would like to do is have my rectangle resize to the height of the stage.stageHeight maintaining its bitmap fill, but not resizing the bitmap fill or any children within the sprite.

From what I've read, this is a little tricky because the sprite resizes in relation to what it contains.. or.. something like that.. I really don't know any more.. I saw one example where a person extended the sprite class but I don't know why or how..

in my library there is an image called 'pattern' and my code looks like this:

stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.addEventListener(Event.RESIZE, resizeHandler, false, 0, true);

[code]....