title: How do I add items to a gtk.ComboBox created through glade at runtime?
body: <p>I'm using Glade 3 to create a GtkBuilder file for a PyGTK app I'm working on. It's for managing bandwidth, so I have a gtk.ComboBox for selecting the network interface to track. </p>
  
  <p>How do I add strings to the ComboBox at runtime? This is what I have so far:</p>
  
  <pre><code>self.tracked_interface = builder.get_object("tracked_interface")
  
  self.iface_list_store = gtk.ListStore(gobject.TYPE_STRING)
  self.iface_list_store.append(["hello, "])
  self.iface_list_store.append(["world."])
  self.tracked_interface.set_model(self.iface_list_store)
  self.tracked_interface.set_active(0)
  </code></pre>
  
  <p>But the ComboBox remains empty. I tried RTFM'ing, but just came away more confused, if anything.</p>
  
  <p>Cheers.</p>