question: private Rectangle2D drawFill ( Graphics2D g2 , Rectangle2D area ) { Rectangle2D filledArea = ( Rectangle2D ) area . clone ( ) ; filledArea = trimMargin ( filledArea ) ; filledArea = trimBorder ( filledArea ) ; area = trimPadding ( area ) ; g2 . setPaint ( this . fillPaint ) ; g2 . fill ( filledArea ) ; drawBorder ( g2 , filledArea ) ; return filledArea ; }
target:  Draws a colored background. Returns the area wich has been filled.