title: How do I make FileChooser update it's path or selection [Kivy]?
body: <p>I'm very new to Kivy and through a lot of trial and error have gotten a pretty decent working app.</p>
  
  <p>What I can't for the life of me figure out is how to get the FileChooser to update its path based on what I've selected (directory or otherwise). </p>
  
  <p><code>.selection</code> always returns and empty list and <code>.path</code> always returns the starting directory even after I have moved around. I'm missing some event somewhere and have spent a lot of time trying to figure this out and was hoping someone here could help.</p>
  
  <p>I thought <code>.selection</code> and <code>.path</code> would update as I navigated but they seem stuck on their first/default values. I made the <code>testbutton</code> just to see if I could get path or selection to print out/update.</p>
  
  <p>This all gets triggered once they hit another button</p>
  
  <pre><code>def testbutton(self,test,iconview,*args):
      print(test,iconview.path)
  
  filepop=Popup(title='SaveFile')
  FileChooserLayout=BoxLayout(orientation='vertical')
  ButtonArea=BoxLayout(orientation='horizontal',spacing=50,size_hint=(.5,.5),pos_hint={'center_x': 0.5, 'center_y': 0.5})    
  listview=FileChooserListView(path='somepath',dirselect=True)
  test=listview.path
  testbutton=Button(text='test',on_press=partial(self.testbutton, test,iconview))
  ButtonArea.add_widget(testbutton)
  FileChooserLayout.add_widget(ButtonArea)
  filepop.add_widget(FileChooserLayout)
  </code></pre>
  
  <p>Thanks for any help! </p>