public void paintButtonBackground(SynthContext context,Graphics g,int x,int y,int w,int h){
  paintBackground(context,g,x,y,w,h,null);
}

public void paintButtonBackground ( SynthContext context , Graphics g , int x , int y , int w , int h ) { paintBackground ( context , g , x , y , w , h , null ) ; }
paints the background of a button .
