title: Canvas, scrolling and special use case in Flex
body: <p>I have a canvas of variable width and height with a maximum being <strong>2K*2K</strong></p>
  
  <p>This canvas current height and width vary depending on the user screen size. Usualy smaller than 2K*2K.</p>
  
  <p>If the user moves an element (free moving elements like child UIcontainer) inside the canvas at position greater than the current user available H and W, scrollbars should appears (they do and that's fine).</p>
  
  <p>But how can I limit the scrolling  ?</p>
  
  <p>Is there a way to give a max to the vscrolling and hscrolling ? Should i create my own policy ?</p>
  
  <p>Thanks.</p>