title: Kivy Event on carousel when slide change
body: <p>I don't have any idea to find a solution of my problem.</p>
  
  <p>I have make an application with Carousel Widget. In this Carousel I have 4 slides. 
  welcomeSlide -> DVDSlide -> DVDPretSlide --> CategorySlide
  I have make a class for each slides.</p>
  
  <p>I use a ListAdpter to display the data extracted from an Sqlite3 Database.</p>
  
  <p>My pblem is about the refresh of the list, when I modify a DVD (add name to pret) in the DVDSlide, when I slide to the DVDPret, the DVD do not appears because the List is not refresh.</p>
  
  <p>Like the doccumentation for the carousel I don't find the event when slide change. It will be the best if an event exist to get the current slide index.</p>
  
  <p>Have you got any Idea ?</p>
  
  <p>Thanks,</p>