ComboBoxText and constructor/new issues

[Mathieu Bridon <bochecha fedoraproject org>]

Hi,

I have been trying to use a Gtk.ComboBoxText and something seems weird
to me: if I create the combobox with Gtk.ComboBoxText.new(), everything
works as expected, but if I create it with Gtk.ComboBoxText(), the class
seems to be in a state where lots of things will not work afterwards.

Take this short example:

-- BEGIN EXAMPLE ------------------------------------------
from gi.repository import Gtk

def quit(w):
    Gtk.main_quit()

w = Gtk.Window()
w.connect("destroy", quit)

b = Gtk.Box()
w.add(b)

combo1 = Gtk.ComboBoxText.new()
combo2 = Gtk.ComboBoxText()

for i in range(10):
    combo1.append("id-%s"%i, "text-%s"%i)
    combo2.append("id-%s"%i, "text-%s"%i)

combo1.set_active_id("id-3")    # Works as expected
combo2.set_active_id("id-3")    # FAIL: Doesn't set anything as active

print("####")
print(combo1.get_active_id())   # Prints 'id-3'
print(combo1.get_active_text()) # Prints 'text-3'
print(combo2.get_active_id())   # FAIL: Prints 'None'
print(combo2.get_active_text()) # FAIL: Prints 'None'

combo1.set_active(3)            # Works as expected
combo2.set_active(3)            # This works as expected, yay!

print("####")
print(combo1.get_active_id())   # Prints 'id-3'
print(combo1.get_active_text()) # Prints 'text-3'
print(combo2.get_active_id())   # FAIL: Still prints 'None'
print(combo2.get_active_text()) # FAIL: Still prints 'None'

b.pack_start(combo1, True, True, 0)
b.pack_start(combo2, True, True, 0)
w.show_all()
-- END EXAMPLE --------------------------------------------

First of all, I derived that from looking at the C example in gtk3-demo,
so I am not even sure of the way I'm using the comboboxes. If I am
wrong, I would appreciate some pointers on how to do it properly.

Now to the first question: is this difference of behavior expected?
Should I never use the constructor but always use .new()?

Second, when defining the Gtk.ComboBoxText in a .ui file with
Gtk.Builder, then the widget seems to be created with Gtk.ComboBoxText()
rather than Gtk.ComboBoxText.new(), and everything fails consequently
(I'm not sure of that, but the observed behavior is consistent with what
happens in the previous example).

Again, is that expected? Is there something I missed that could make the
combobox work with Gtk.Builder?

Should I report a bug?

I didn't find anything about this in the documentation or the wiki
pages, but I might have overlooked something.

This is on Fedora 15 with python3-gobject-2.28.4 and
gobject-introspection-0.10.8.

Thanks in advance,


-- 
Mathieu