diff -r f4b434672204 -r 4cbbc58b91b4 graphics/ToolTipProducer.py
--- a/graphics/ToolTipProducer.py	Mon May 27 13:09:54 2013 +0200
+++ b/graphics/ToolTipProducer.py	Mon May 27 13:10:32 2013 +0200
@@ -74,7 +74,8 @@
     
     def GetToolTipValue(self):
         """
-        Generic method that have to be overridden by derived classes 
+        Return tool tip text
+        Have to be overridden by inherited classes 
         @return: Tool tip text (None if not overridden) 
         """
         return None