[pygobject] Override Container to behave like a sequence

[Paolo Borelli <pborelli src gnome org>]

commit 7a8af9e220ee48aa28f6b025c5dae324b14fe128
Author: Paolo Borelli <pborelli gnome org>
Date:   Sun Nov 28 13:02:30 2010 +0100

    Override Container to behave like a sequence

 gi/overrides/Gtk.py     |    6 ++++++
 tests/test_overrides.py |   11 +++++++++++
 2 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/gi/overrides/Gtk.py b/gi/overrides/Gtk.py
index 376fc39..dd87c78 100644
--- a/gi/overrides/Gtk.py
+++ b/gi/overrides/Gtk.py
@@ -49,6 +49,12 @@ __all__.append('Widget')
 
 class Container(Gtk.Container, Widget):
 
+    def __len__(self):
+        return len(self.get_children())
+
+    def __contains__(self, child):
+        return child in self.get_children()
+
     def get_focus_chain(self):
         success, widgets = super(Container, self).get_focus_chain()
         if success:
diff --git a/tests/test_overrides.py b/tests/test_overrides.py
index 6679623..afd5f3d 100644
--- a/tests/test_overrides.py
+++ b/tests/test_overrides.py
@@ -56,6 +56,17 @@ class TestGdk(unittest.TestCase):
         self.assertEquals(event.y_root, 5)
 
 class TestGtk(unittest.TestCase):
+
+    def test_container(self):
+        box = Gtk.Box()
+        label = Gtk.Label()
+        label2 = Gtk.Label()
+        box.add(label)
+        box.add(label2)
+        self.assertTrue(label in box)
+        self.assertTrue(label2 in box)
+        self.assertEqual(len(box),2)
+
     def test_actiongroup(self):
         self.assertEquals(Gtk.ActionGroup, overrides.Gtk.ActionGroup)
         self.assertRaises(TypeError, Gtk.ActionGroup)