[pygtk] how to add to a scrolledwindow?

[Brian Keck]

Hello,

I've written very little pygtk (& no straight gtk), & am stuck trying to
add to a vbox inside a scrolledwindow.

A minimal example is ...

    import gtk
    window = gtk.Window()
    window.connect('destroy', gtk.main_quit)
    scrolled = gtk.ScrolledWindow()
    window.add(scrolled)
    vbox = gtk.VBox()
    scrolled.add_with_viewport(vbox)
    def addbutton(window, event):
      vbox.pack_start(gtk.Button('extra'))
      window.show_all
    b1 = gtk.Button('aaa')
    b1.connect('button_press_event', addbutton)
    vbox.pack_start(b1)
    b2 = gtk.Button('bbb')
    vbox.pack_start(b2)
    window.show_all()
    gtk.main()

I click 'aaa' but no 'extra' appears.

The actual application starts with a list of book authors as button
labels.  Clicking on an author should insert the author's book titles (a
vbox of buttons) between this author & the next.  Also, it's for a Nokia
N900 & really uses hildon.PannableArea etc.

Thanks for any help,
Brian Keck