diff -r e6b58eafef1a -r cc5377a296ea Dialogs.py
--- a/Dialogs.py	Sat Sep 06 16:30:57 2008 +0200
+++ b/Dialogs.py	Sun Sep 07 15:25:40 2008 +0200
@@ -522,8 +522,9 @@
         
         self._init_sizers()
 
-    def __init__(self, parent, controler):
+    def __init__(self, parent, controler, transition = ""):
         self._init_ctrls(parent, controler)
+        self.Transition = transition
         self.Variable = None
         self.VarList = []
         self.MinVariableSize = None
@@ -546,9 +547,11 @@
             elif var_type == "Input" and self.Class.GetStringSelection() == "Input":
                 self.VariableName.Append(name)
             elif var_type == "Output" and self.Class.GetStringSelection() == "Output":
-                self.VariableName.Append(name)
+                if transition != "" or name == transition:
+                    self.VariableName.Append(name)
             elif var_type == "InOut" and self.Class.GetStringSelection() == "InOut":
-                self.VariableName.Append(name)
+                if transition != "" or name == transition:
+                    self.VariableName.Append(name)
         if self.VariableName.FindString(selected) != wx.NOT_FOUND:
             self.VariableName.SetStringSelection(selected)
         else: