title: Extjs 4 with extjs 3 calendar?
body: <p>I'm on extjs 4 and I try to find a compatible calendar for extjs 4 
  (I try : <a href="http://ext.ensible.com/products/calendar/" rel="nofollow">http://ext.ensible.com/products/calendar/</a> but it's doesn't work with extjs 4..)
  I searched  and I didn't find anything..</p>
  
  <p>Another solution would be to use extjs 3 calendar in sandbox with my app on extjs 4, but I have no idea how to do it.
  ( My apps likes the layout-browser example have a tree menu on the left, and onclick on one node I want to print my calendar in the center panel .
  My central panel is a vcard, so I just have to change the active item, but I don't know how to set an active item with extjs 3 (my calendar !) )</p>
  
  <p>Ps: it's not for a commercial use, so something "free" if it's possible </p>
  
  <p>Thanks for you help !</p>