--- a/plugins/python/PythonEditor.py	Fri Dec 16 22:54:24 2011 +0100
+++ b/plugins/python/PythonEditor.py	Fri Dec 16 22:55:13 2011 +0100
@@ -571,6 +571,9 @@
 #                          Edit Project Menu Functions
 #-------------------------------------------------------------------------------
 
+    def RefreshFileMenu(self):
+        pass
+
     def RefreshEditMenu(self):
         undo, redo = self.Controler.GetBufferState()
         self.EditMenu.Enable(wx.ID_UNDO, undo)

--- a/plugins/python/python.py	Fri Dec 16 22:54:24 2011 +0100
+++ b/plugins/python/python.py	Fri Dec 16 22:55:13 2011 +0100
@@ -2,6 +2,7 @@
 import os
 import modules
 from plugger import PlugTemplate, opjimg
+from PLCControler import UndoBuffer
 from PythonEditor import PythonEditorFrame
 
 from xml.dom import minidom
@@ -10,88 +11,6 @@
 
 PythonClasses = GenerateClassesFromXSD(os.path.join(os.path.dirname(__file__), "python_xsd.xsd")) 
 
-#-------------------------------------------------------------------------------
-#                         Undo Buffer for PythonCode
-#-------------------------------------------------------------------------------
-
-# Length of the buffer
-UNDO_BUFFER_LENGTH = 20
-
-"""
-Class implementing a buffer of changes made on the current editing model
-"""
-class UndoBuffer:
-
-    # Constructor initialising buffer
-    def __init__(self, currentstate, issaved = False):
-        self.Buffer = []
-        self.CurrentIndex = -1
-        self.MinIndex = -1
-        self.MaxIndex = -1
-        # if current state is defined
-        if currentstate:
-            self.CurrentIndex = 0
-            self.MinIndex = 0
-            self.MaxIndex = 0
-        # Initialising buffer with currentstate at the first place
-        for i in xrange(UNDO_BUFFER_LENGTH):
-            if i == 0:
-                self.Buffer.append(currentstate)
-            else:
-                self.Buffer.append(None)
-        # Initialising index of state saved
-        if issaved:
-            self.LastSave = 0
-        else:
-            self.LastSave = -1
-    
-    # Add a new state in buffer
-    def Buffering(self, currentstate):
-        self.CurrentIndex = (self.CurrentIndex + 1) % UNDO_BUFFER_LENGTH
-        self.Buffer[self.CurrentIndex] = currentstate
-        # Actualising buffer limits
-        self.MaxIndex = self.CurrentIndex
-        if self.MinIndex == self.CurrentIndex:
-            # If the removed state was the state saved, there is no state saved in the buffer
-            if self.LastSave == self.MinIndex:
-                self.LastSave = -1
-            self.MinIndex = (self.MinIndex + 1) % UNDO_BUFFER_LENGTH
-        self.MinIndex = max(self.MinIndex, 0)
-    
-    # Return current state of buffer
-    def Current(self):
-        return self.Buffer[self.CurrentIndex]
-    
-    # Change current state to previous in buffer and return new current state
-    def Previous(self):
-        if self.CurrentIndex != self.MinIndex:
-            self.CurrentIndex = (self.CurrentIndex - 1) % UNDO_BUFFER_LENGTH
-            return self.Buffer[self.CurrentIndex]
-        return None
-    
-    # Change current state to next in buffer and return new current state
-    def Next(self):
-        if self.CurrentIndex != self.MaxIndex:
-            self.CurrentIndex = (self.CurrentIndex + 1) % UNDO_BUFFER_LENGTH
-            return self.Buffer[self.CurrentIndex]
-        return None
-    
-    # Return True if current state is the first in buffer
-    def IsFirst(self):
-        return self.CurrentIndex == self.MinIndex
-    
-    # Return True if current state is the last in buffer
-    def IsLast(self):
-        return self.CurrentIndex == self.MaxIndex
-
-    # Note that current state is saved
-    def CurrentSaved(self):
-        self.LastSave = self.CurrentIndex
-        
-    # Return True if current state is saved
-    def IsCurrentSaved(self):
-        return self.LastSave == self.CurrentIndex
-
 class PythonCodeTemplate:
     
     def __init__(self):