--- a/PLCControler.py	Wed Sep 19 13:32:24 2007 +0200
+++ b/PLCControler.py	Wed Sep 19 15:20:59 2007 +0200
@@ -1455,7 +1455,7 @@
             for type, varlist in pou.getVars():
                 for var in varlist.getVariable():
                     if var.getName() == varname:
-                        return var.getType()
+                        return var.getType().getValue()
         return ""
     
     def SetConnectionWires(self, connection, connector):

--- a/PLCOpenEditor.py	Wed Sep 19 13:32:24 2007 +0200
+++ b/PLCOpenEditor.py	Wed Sep 19 15:20:59 2007 +0200
@@ -2645,8 +2645,13 @@
         def VariableTypeFunction(event):
             row = self.VariablesGrid.GetGridCursorRow()
             self.Table.SetValueByName(row, "Type", base_type)
-            self.SaveValues()
             self.Table.ResetView(self.VariablesGrid)
+            self.SaveValues(False)
+            self.Viewer.RefreshView()
+            self.Viewer.VerifyVariableTypeCompatibility()
+            self.Controler.BufferProject()
+            self.ParentWindow.RefreshTitle()
+            self.ParentWindow.RefreshEditMenu()
             event.Skip()
         return VariableTypeFunction
     

--- a/TextViewer.py	Wed Sep 19 13:32:24 2007 +0200
+++ b/TextViewer.py	Wed Sep 19 15:20:59 2007 +0200
@@ -239,7 +239,10 @@
         self.RefreshJumpList()
         self.EmptyUndoBuffer()
         self.DisableEvents = False
-        
+    
+    def VerifyVariableTypeCompatibility(self):
+        pass
+    
     def OnStyleNeeded(self, event):
         self.TextChanged = True
         line = self.LineFromPosition(self.GetEndStyled())

--- a/Viewer.py	Wed Sep 19 13:32:24 2007 +0200
+++ b/Viewer.py	Wed Sep 19 15:20:59 2007 +0200
@@ -272,6 +272,15 @@
         self.Comments = {}
         self.SelectedElement = None
     
+    # Verify wires type compatibility
+    def VerifyVariableTypeCompatibility(self):
+        to_delete = []
+        for wire in self.Wires:
+            if not wire.IsConnectedCompatible():
+                to_delete.append(wire)
+        for wire in to_delete:
+            wire.Delete()
+    
     # Remove all elements
     def CleanView(self):
         for block in self.Blocks.keys():
@@ -324,10 +333,6 @@
         self.RefreshScrollBars()
         self.Refresh(False)
     
-    def Scroll(self, x, y):
-        print "Scroll to (%d, %d)"%(x, y)
-        wx.ScrolledWindow.Scroll(self, x, y)
-    
     def RefreshScrollBars(self):
         xstart, ystart = self.GetViewStart()
         window_size = self.GetClientSize()

--- a/graphics/GraphicCommons.py	Wed Sep 19 13:32:24 2007 +0200
+++ b/graphics/GraphicCommons.py	Wed Sep 19 15:20:59 2007 +0200
@@ -24,7 +24,7 @@
 
 import wx
 from math import *
-
+from plcopen.structures import IsOfType
 
 #-------------------------------------------------------------------------------
 #                               Common constants
@@ -707,6 +707,10 @@
     def GetType(self):
         return self.Type
     
+    # Returns if connector type is compatible with type given
+    def IsCompatible(self, type):
+        return IsOfType(type, self.Type) or IsOfType(self.Type, type)
+    
     # Changes the connector name
     def SetType(self, type):
         self.Type = type
@@ -968,10 +972,29 @@
     def GetStartConnected(self):
         return self.StartConnected
     
+    # Returns connector to which start point is connected
+    def GetStartConnectedType(self):
+        if self.StartConnected:
+            return self.StartConnected.GetType()
+        return None
+    
     # Returns connector to which end point is connected
     def GetEndConnected(self):
         return self.EndConnected
     
+    # Returns connector to which end point is connected
+    def GetEndConnectedType(self):
+        if self.EndConnected:
+            return self.EndConnected.GetType()
+        return None
+    
+    def IsConnectedCompatible(self):
+        if self.StartConnected:
+            return self.StartConnected.IsCompatible(self.GetEndConnectedType())
+        elif self.EndConnected:
+            return True
+        return False
+    
     # Unconnect the start and end points
     def Clean(self):
         if self.StartConnected:
@@ -1609,13 +1632,13 @@
             new_pos = wx.Point(self.Points[handle].x + movex, self.Points[handle].y + movey)
             connector = self.Parent.FindBlockConnector(new_pos)
             if connector:
-                if handle == 0 and self.EndConnected != connector:
+                if handle == 0 and self.EndConnected != connector and connector.IsCompatible(self.GetEndConnectedType()):
                     connector.Connect((self, handle))
                     self.SetStartPointDirection(connector.GetDirection())
                     self.ConnectStartPoint(connector.GetPosition(), connector)
                     self.oldPos = connector.GetPosition()
                     self.Dragging = False
-                elif handle != 0 and self.StartConnected != connector:
+                elif handle != 0 and self.StartConnected != connector and connector.IsCompatible(self.GetStartConnectedType()):
                     connector.Connect((self, handle))
                     self.SetEndPointDirection(connector.GetDirection())
                     self.ConnectEndPoint(connector.GetPosition(), connector)

--- a/plcopen/structures.py	Wed Sep 19 13:32:24 2007 +0200
+++ b/plcopen/structures.py	Wed Sep 19 15:20:59 2007 +0200
@@ -262,7 +262,9 @@
 """
 
 def IsOfType(test, reference):
-    while test != None:
+    if reference is None:
+        return True
+    while test is not None:
         if test == reference:
             return True
         test = TypeHierarchy[test]
@@ -272,7 +274,7 @@
 returns list of all types that correspont to the ANY* meta type
 """
 def GetSubTypes(reference):
-    return [ typename for typename, parenttype in TypeHierarchy_list if typename[:3] != "ANY" and IsOfType(typename, reference)]
+    return [typename for typename, parenttype in TypeHierarchy_list if typename[:3] != "ANY" and IsOfType(typename, reference)]
 
 
 #-------------------------------------------------------------------------------