Message dialog on 'focus-out-event'

[Tuomas]

import pygtk, gtk, gobject, ...

class MyEntry(gtk.Entry):
     def __init__(self, is_OK):
         gtk.Entry.__init__(self)
         self.is_OK=is_OK
         self.add_events(gtk.gdk.FOCUS_CHANGE)
         self.focus_out_id=self.connect('focus-out-event',
                                        self.on_focus_out)

     def on_focus_out(self, sender, event):
         if self.is_OK(self.get_text()): return False
         else:
             # don't want another focus-out-event because of show_message
             self.disconnect(self.focus_out_id)
             # self.grab_focus()
             show_message("Wrong value for entry")
             self.focus_out_id=self.connect('focus-out-event',
                                            self.on_focus_out)
             return False

             # Leaving focus in not_OK case results:

             # GtkWarning: GtkEntry - did not receive focus-out-event.
             # If you connect a handler to this signal, it must return
             # FALSE so the entry gets the event as well

             # The required False is given, but may be the messagebox
             # times it out.

             # My second trial was to include self.grab_focus() before
             # show_message, but it gives focus to the toplevel
             # gtk.gdk.Window and I lose access to the entry.

             # Any suggestions?
             # Tuomas Vesterinen