How to move coordinate position of Flash Download Progress Bar?

I am extending the Flash DownloadProgressBar component for use as开发者_如何学运维 a preloader with Flex. Is it possible to override the x and y coordinate position of the progress bar? (the default is to center the bar)

For anyone interested, have to override functions barFrameRect, barRect, borderRect and labelRect. Was confusing because couldn't figure out how to override the progress bar positioning for SparkDownloadProgressBar.