--- a/frontends/src/quick_frontend/quick_widgets.py	Sat Feb 07 14:47:23 2015 +0100
+++ b/frontends/src/quick_frontend/quick_widgets.py	Mon Feb 09 09:19:30 2015 +0100
@@ -100,18 +100,20 @@
         @param class_(class): class of the widget to create
         @param target: target depending of the widget, usually a JID instance
         @param args(list): optional args to create a new instance of class_
-        @param kwargs(list): optional kwargs to create anew instance of class_
+        @param kwargs(dict): optional kwargs to create a new instance of class_
             if 'profile' key is present, it will be popped and put in 'profiles'
             if there is neither 'profile' nor 'profiles', None will be used for 'profiles'
             if 'on_new_widget' is present it can have the following values:
                 C.WIDGET_NEW [default]: self.host.newWidget will be called on widget creation
-                [callable]: this method will be called instead of self.host.newWidget
+                [callable]: this method will be called instead of self.host.newWidget,
+                    and can return another widget to modify the result of the present method
                 None: do nothing
             if 'on_existing_widget' is present it can have the following values:
                 C.WIDGET_KEEP  [default]: return the existing widget
                 C.WIDGET_RAISE: raise WidgetAlreadyExistsError
                 C.WIDGET_RECREATE: create a new widget *WITH A NEW HASH*
-                [callable]: this method will be called with existing widget as argument
+                [callable]: this method will be called with existing widget as argument,
+                    and can return another widget to modify the result of the present method
             if 'force_hash' is present, the hash given in value will be used instead of the one returned by class_.getWidgetHash
             other keys will be used to instanciate class_ if the case happen (e.g. if type_ is present and class_ is a QuickChat subclass,
                 it will be used to create a new QuickChat instance).
@@ -169,7 +171,9 @@
             if on_new_widget == C.WIDGET_NEW:
                 self.host.newWidget(widget)
             elif callable(on_new_widget):
-                on_new_widget(widget)
+                result = on_new_widget(widget)
+                if isinstance(result, QuickWidget):
+                    widget = result
             else:
                 assert on_new_widget is None
         else:
@@ -204,7 +208,9 @@
                         log.debug(u"Widget already exists, a new one has been recreated with hash {}".format(new_kwargs['force_hash']))
                         break
             elif callable(on_existing_widget):
-                on_existing_widget(widget)
+                result = on_existing_widget(widget)
+                if isinstance(result, QuickWidget):
+                    widget = result
             else:
                 raise exceptions.InternalError("Unexpected on_existing_widget value ({})".format(on_existing_widget))