base qt: Fixed an incompatibility with PyQt 4.5.1 (lists of non Q values couldn't be sent directly to QVariant anymore).

--HG--
extra : convert_revision : svn%3Ac306627e-7827-47d3-bdf0-9a457c9553a1/trunk%4070

base/qt/preferences.py

@@ -30,9 +30,14 @@ def variant_to_py(v):
     elif t in (QVariant.List, QVariant.StringList):
         value, ok = map(variant_to_py, v.toList()), True
     if not ok:
-        raise TypeError()
+        raise TypeError(u"Can't convert {0} of type {1}".format(repr(v), v.type()))
     return value    
 
+def py_to_variant(v):
+    if isinstance(v, (list, tuple)):
+        return QVariant(map(py_to_variant, v))
+    return QVariant(v)
+
 class Preferences(object):
     # (width, is_visible)
     COLUMNS_DEFAULT_ATTRS = []
@@ -94,7 +99,7 @@ class Preferences(object):
     def save(self):
         settings = QSettings()
         def set_(name, value):
-            settings.setValue(name, QVariant(value))
+            settings.setValue(name, py_to_variant(value))
         
         set_('FilterHardness', self.filter_hardness)
         set_('MixFileKind', self.mix_file_kind)