GtkWidget::queue_draw_area
void
      queue_draw_area
     (int
      x
     , int
      y
     , int
      width
     , int
      height
     ); 
    
     This has exactly the same functionality as
     queue_draw() , with the exception
     that the area to be redrawn can be defined in the parameters. The upper
     left corner of the rectangle to be redrawn is given by x
     and y. width is the width of the
     rectangle to be redrawn and height is the height of the
     rectangle to be redrawn.
    
    
     See also: queue_draw()