title: Resizing prob with GXT ViewPort
body: <p>I'm developing a browser-based application with GWT/GXT.
  The html file contains a static header write in html, and a div which is fill with a ViewPort.</p>
  
  <p>The ViewPort is very useful here, because it allows the auto-resizing. However, the ViewPort is always resize with the browser size, and don't consider the html header size.
  So I always have a part of the ViewPort hides :/</p>
  
  <p>Do you know an alternative way ?</p>
  
  <p>Sorry for my poor english :)
  Thank's</p>