If you create an option menu using GtkExtra.MenuFactory, the resulting
menu is "squashed", and initially appears with no default setting.
The reason turns out to be simple, and typical of Gtk+. If you
associate a GtkMenu with a GtkOptionMenu before adding items to the
GtkMenu, the GtkOptionMenu behaves as above. If you wait until the
GtkMenu is fully populated, the GtkOptionMenu displays a default
selection and has a reasonable size.
I tried a couple of different mods to GtkExtra.MenuFactory, hoping to
apply the above workaround without breaking any existing behavior.
And failed. (I haven't tried refactoring MenuFactory into a set of
related classes. Maybe tomorrow...)
Instead, here's a hacky workaround: a subclass which re-attaches the
GtkMenu to its GtkOptionMenu every time a new menu item is created.
import GtkExtra
class OptionMenuFactory(GtkExtra.MenuFactory):
def create(self, path, accelerator=None, callback=None, *args):
"""Work around a Gtk+ bug: if you set_menu on a GtkOptionMenu
before the corresponding GtkMenu has been fully populated, the
result is a 'squished', initially blank option menu.
A better workaround might be to refactor GtkExtra.MenuFactory
into a hierarchy of classes."""
result = apply(GtkExtra.MenuFactory.create,
(self, path, accelerator, callback) + args)
self._MenuFactory__ret.remove_menu()
self._MenuFactory__ret.set_menu(self._MenuFactory__w)
return result
--
Mitch Chapman
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