From 265d9858db3ef14ece11e9d56395ea1640f22753 Mon Sep 17 00:00:00 2001
From: Qua-non <akshayaurora@gmail.com>
Date: Sat, 21 Jul 2012 14:17:58 +0530
Subject: [PATCH] UIX:add_widget: raise Exception instead of just a warning on
 multiple parents

---
 kivy/uix/widget.py | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/kivy/uix/widget.py b/kivy/uix/widget.py
index 5042c2100..a3c122ea0 100644
--- a/kivy/uix/widget.py
+++ b/kivy/uix/widget.py
@@ -65,7 +65,6 @@ from kivy.properties import NumericProperty, StringProperty, \
 from kivy.graphics import Canvas
 from kivy.base import EventLoop
 from kivy.lang import Builder
-from kivy.logger import Logger
 
 
 class WidgetException(Exception):
@@ -231,10 +230,8 @@ class Widget(EventDispatcher):
         parent = widget.parent
         # check if widget is already a child of another widget
         if parent:
-            Logger.warning(''.join(('Cannot add Widget ', str(widget),\
-                ' It already has a parent ', str(parent),
-                ' Skipping addition')))
-            return
+            raise WidgetException(''.join(('Cannot add ', str(widget),\
+                ' It already has a parent: ', str(parent))))
         widget.parent = self
         if index == 0 or len(self.children) == 0:
             self.children.insert(0, widget)