diff -r 7cadc624cc74 -r 996515c4b394 TextViewer.py
--- a/TextViewer.py	Wed Sep 05 12:38:41 2012 +0200
+++ b/TextViewer.py	Wed Sep 05 12:39:50 2012 +0200
@@ -29,7 +29,7 @@
 import re
 
 from graphics.GraphicCommons import ERROR_HIGHLIGHT, SEARCH_RESULT_HIGHLIGHT, REFRESH_HIGHLIGHT_PERIOD
-from plcopen.structures import ST_BLOCK_START_KEYWORDS, ST_BLOCK_END_KEYWORDS, IEC_BLOCK_START_KEYWORDS, IEC_BLOCK_END_KEYWORDS
+from plcopen.structures import ST_BLOCK_START_KEYWORDS, ST_BLOCK_END_KEYWORDS, IEC_BLOCK_START_KEYWORDS, IEC_BLOCK_END_KEYWORDS, LOCATIONDATATYPES
 from controls import EditorPanel
 
 #-------------------------------------------------------------------------------
@@ -324,11 +324,31 @@
                     elif var_name.upper() in [name.upper() for name in self.Controler.GetEditedElementVariables(self.TagName, self.Debug)]:
                         message = _("\"%s\" element for this pou already exists!")%var_name
                     else:
+                        location = values[0]
+                        if not location.startswith("%"):
+                            dialog = wx.SingleChoiceDialog(self.ParentWindow, 
+                                  _("Select a variable class:"), _("Variable class"), 
+                                  ["Input", "Output", "Memory"], 
+                                  wx.DEFAULT_DIALOG_STYLE|wx.OK|wx.CANCEL)
+                            if dialog.ShowModal() == wx.ID_OK:
+                                selected = dialog.GetSelection()
+                            else:
+                                selected = None
+                            dialog.Destroy()
+                            if selected is None:
+                                event.SetDragText("")
+                                return
+                            if selected == 0:
+                                location = "%I" + location
+                            elif selected == 1:
+                                location = "%Q" + location
+                            else:
+                                location = "%M" + location
                         if values[2] is not None:
                             var_type = values[2]
                         else:
-                            var_type = LOCATIONDATATYPES.get(values[0][2], ["BOOL"])[0]
-                        self.Controler.AddEditedElementPouVar(self.TagName, var_type, var_name, values[0], values[4])
+                            var_type = LOCATIONDATATYPES.get(location[2], ["BOOL"])[0]
+                        self.Controler.AddEditedElementPouVar(self.TagName, var_type, var_name, location, values[4])
                         self.RefreshVariablePanel()
                         self.RefreshVariableTree()
                         event.SetDragText(var_name)