title: PyGTK: Parent window wait until child window is showed
body: <p>I'm learning PyGTK and I have a parent window and a child window. Inside of a parent window's method, i create the child window and then I refresh a treeview... something like that:</p>
  
  <pre><code>def add_user(self, widget, data = None):
      save_user.SaveUser(self.window)
      self.load_tree_view()
  </code></pre>
  
  <p>But, when it's running, the child window appears and the load_tree_view() method is executed. I want that parent window wait until the child window is opened/showed. After that, load_tree_view runs ...</p>
  
  <p>How can I do that?
  Thank you.</p>