[pygobject] Allow setting values through GtkTreeModelFilter

[Martin Pitt <martinpitt src gnome org>]

commit c90ef9dfac7dd51ec82c99c3605915996bea0f73
Author: Simonas Kazlauskas <simonas kazlauskas me>
Date:   Tue Dec 4 15:45:00 2012 +0200

    Allow setting values through GtkTreeModelFilter
    
    Previously, trying to set a value through filter throwed an exception that the
    model has no set_value() method. You had to first retrieve the deepest child
    model and set value to it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=689624

 gi/overrides/Gtk.py         |    5 +++++
 tests/test_overrides_gtk.py |   11 +++++++++++
 2 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/gi/overrides/Gtk.py b/gi/overrides/Gtk.py
index 337bed6..15c0ae6 100644
--- a/gi/overrides/Gtk.py
+++ b/gi/overrides/Gtk.py
@@ -1544,6 +1544,11 @@ class TreeModelFilter(Gtk.TreeModelFilter):
     def set_visible_func(self, func, data=None):
         super(TreeModelFilter, self).set_visible_func(func, data)
 
+    def set_value(self, iter, column, value):
+        # Delegate to child model
+        iter = self.convert_iter_to_child_iter(iter)
+        self.get_model().set_value(iter, column, value)
+
 TreeModelFilter = override(TreeModelFilter)
 __all__.append('TreeModelFilter')
 
diff --git a/tests/test_overrides_gtk.py b/tests/test_overrides_gtk.py
index 3aced38..d429d4d 100644
--- a/tests/test_overrides_gtk.py
+++ b/tests/test_overrides_gtk.py
@@ -1344,6 +1344,17 @@ class TestTreeModel(unittest.TestCase):
         model.row_inserted('3', Gtk.TreeIter())
         self.assertEqual(tree_paths[-1], '3')
 
+    def test_tree_model_filter(self):
+        model = Gtk.ListStore(int, str, float)
+        model.append([1, "one", -0.1])
+        model.append([2, "two", -0.2])
+
+        filtered = Gtk.TreeModelFilter(child_model=model)
+
+        self.assertEqual(filtered[0][1], 'one')
+        filtered[0][1] = 'ONE'
+        self.assertEqual(filtered[0][1], 'ONE')
+
 
 @unittest.skipUnless(Gtk, 'Gtk not available')
 class TestTreeView(unittest.TestCase):