title: How to catch clicks in a Gtk.TreeView?
body: <p>I'm trying to catch a double-click event in a TreeView's empty area to create a new node. Unfortunately standard way doesn't work. I've tried attaching ButtonPressEvent to both TreeView and the ScrolledWindow in which T.V. is hosted. I don't get any callbacks to my function.</p>
  
  <p>How can I solve this?</p>