title: Scrollable lines/rectangles/ellipses in a panel
body: <p>I have a series of rectangles/lines/ellipses via g.FillRectangle etc in a panel which are drawn upon button click (not on form creation).
  I would like to be able to have this 'shape' to scroll vertically and horizontally because the number of rectangles and dimensions of this shape varies depending on some parameters so I can 'explore' the entire 'shape'. </p>
  
  <p>Also I would like to be able to add rectangles/lines/ellipses while I am doing this....I am to different parts of the shape.
  Any ideas on how I can achieve that?</p>