Dialogs.py
changeset 27 dae55dd9ee14
child 28 fc23e1f415d8
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Dialogs.py	Mon Jul 09 11:10:14 2007 +0200
@@ -0,0 +1,1526 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor
+#based on the plcopen standard. 
+#
+#Copyright (C): Edouard TISSERANT and Laurent BESSARD
+#
+#See COPYING file for copyrights details.
+#
+#This library is free software; you can redistribute it and/or
+#modify it under the terms of the GNU General Public
+#License as published by the Free Software Foundation; either
+#version 2.1 of the License, or (at your option) any later version.
+#
+#This library is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+#Lesser General Public License for more details.
+#
+#You should have received a copy of the GNU General Public
+#License along with this library; if not, write to the Free Software
+#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+from wxPython.wx import *
+from wxPython.grid import *
+import wx
+
+from graphics.FBD_Objects import *
+from graphics.LD_Objects import *
+from graphics.SFC_Objects import *
+
+#-------------------------------------------------------------------------------
+#                          Create New Block Dialog
+#-------------------------------------------------------------------------------
+
+[wxID_BLOCKPROPERTIESDIALOG, wxID_BLOCKPROPERTIESDIALOGMAINPANEL, 
+ wxID_BLOCKPROPERTIESDIALOGNAME, wxID_BLOCKPROPERTIESDIALOGTYPETREE, 
+ wxID_BLOCKPROPERTIESDIALOGTYPEDESC, wxID_BLOCKPROPERTIESDIALOGINPUTS, 
+ wxID_BLOCKPROPERTIESDIALOGPREVIEW, wxID_BLOCKPROPERTIESDIALOGSTATICTEXT1, 
+ wxID_BLOCKPROPERTIESDIALOGSTATICTEXT2, wxID_BLOCKPROPERTIESDIALOGSTATICTEXT3, 
+ wxID_BLOCKPROPERTIESDIALOGSTATICTEXT4, 
+] = [wx.NewId() for _init_ctrls in range(11)]
+
+[CATEGORY, BLOCK] = range(2)
+
+class BlockPropertiesDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_BLOCKPROPERTIESDIALOG,
+              name='BlockPropertiesDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(600, 360), style=wx.DEFAULT_DIALOG_STYLE,
+              title='Block Properties')
+        self.SetClientSize(wx.Size(600, 360))
+
+        self.MainPanel = wx.Panel(id=wxID_BLOCKPROPERTIESDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(600, 320), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.staticbox1 = wx.StaticBox(id=wxID_BLOCKPROPERTIESDIALOGSTATICTEXT1,
+              label='Type:', name='staticBox1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(245, 280), style=0)
+
+        self.staticText2 = wx.StaticText(id=wxID_BLOCKPROPERTIESDIALOGSTATICTEXT2,
+              label='Name:', name='staticText2', parent=self.MainPanel,
+              pos=wx.Point(274, 24), size=wx.Size(70, 17), style=0)
+
+        self.staticText3 = wx.StaticText(id=wxID_BLOCKPROPERTIESDIALOGSTATICTEXT2,
+              label='Inputs:', name='staticText4', parent=self.MainPanel,
+              pos=wx.Point(424, 24), size=wx.Size(70, 17), style=0)
+
+        self.staticText4 = wx.StaticText(id=wxID_BLOCKPROPERTIESDIALOGSTATICTEXT4,
+              label='Preview:', name='staticText4', parent=self.MainPanel,
+              pos=wx.Point(274, 80), size=wx.Size(100, 17), style=0)
+
+        self.TypeTree = wx.TreeCtrl(id=wxID_BLOCKPROPERTIESDIALOGTYPETREE,
+              name='TypeTree', parent=self.MainPanel, pos=wx.Point(34, 44),
+              size=wx.Size(225, 180), style=wx.TR_HAS_BUTTONS|wx.TR_HIDE_ROOT|wx.TR_SINGLE|wx.SUNKEN_BORDER)
+        EVT_TREE_SEL_CHANGED(self, wxID_BLOCKPROPERTIESDIALOGTYPETREE, self.OnTypeTreeItemSelected)
+
+        self.TypeDesc = wx.TextCtrl(id=wxID_BLOCKPROPERTIESDIALOGTYPEDESC,
+              name='TypeDesc', parent=self.MainPanel, pos=wx.Point(34, 230),
+              size=wx.Size(225, 65), style=wx.TE_READONLY|wx.TE_MULTILINE)
+
+        self.Name = wx.TextCtrl(id=wxID_BLOCKPROPERTIESDIALOGNAME, value='',
+              name='Name', parent=self.MainPanel, pos=wx.Point(274, 48),
+              size=wx.Size(145, 24), style=0)
+        EVT_TEXT(self, wxID_BLOCKPROPERTIESDIALOGNAME, self.OnNameChanged)
+
+        self.Inputs = wx.SpinCtrl(id=wxID_BLOCKPROPERTIESDIALOGINPUTS,
+              name='Inputs', parent=self.MainPanel, pos=wx.Point(424, 48),
+              size=wx.Size(145, 24), style=wxSP_ARROW_KEYS, min=2, max=20)
+        EVT_SPINCTRL(self, wxID_BLOCKPROPERTIESDIALOGINPUTS, self.OnInputsChanged)
+
+        self.Preview = wx.Panel(id=wxID_BLOCKPROPERTIESDIALOGPREVIEW,
+              name='Preview', parent=self.MainPanel, pos=wx.Point(274, 104),
+              size=wx.Size(300, 200), style=wx.TAB_TRAVERSAL|wx.SIMPLE_BORDER)
+        self.Preview.SetBackgroundColour(wxColour(255,255,255))
+
+        self._init_sizers()
+
+    def __init__(self, parent):
+        self._init_ctrls(parent)
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+        self.Name.SetValue("")
+        self.Name.Enable(False)
+        self.Inputs.Enable(False)
+        self.Block = None
+        self.MinBlockSize = None
+        
+        EVT_PAINT(self, self.OnPaint)
+        EVT_BUTTON(self, self.ButtonSizer.GetAffirmativeButton().GetId(), self.OnOK)
+    
+    def FindTreeItem(self, root, name):
+        if root.IsOk():
+            if self.TypeTree.GetItemText(root) == name:
+                return root
+            else:
+                item, root_cookie = self.TypeTree.GetFirstChild(root)
+                while item.IsOk():
+                    result = self.FindTreeItem(item, name)
+                    if result:
+                        return result
+                    item, root_cookie = self.TypeTree.GetNextChild(root, root_cookie)
+        return None
+    
+    def OnOK(self, event):
+        error = []
+        selected = self.TypeTree.GetSelection()
+        if not selected.IsOk() or self.TypeTree.GetItemParent(selected) == self.TypeTree.GetRootItem() or selected == self.TypeTree.GetRootItem():
+            message = wxMessageDialog(self, "Form isn't complete. Valid block type must be selected!", "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        elif self.Name.IsEnabled() and self.Name.GetValue() == "":
+            message = wxMessageDialog(self, "Form isn't complete. Name must be filled!", "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        else:
+            self.EndModal(wxID_OK)
+
+    def SetBlockList(self, blocktypes):
+        root = self.TypeTree.AddRoot("")
+        self.TypeTree.SetPyData(root, CATEGORY)
+        for category in blocktypes:
+            category_item = self.TypeTree.AppendItem(root, category["name"])
+            self.TypeTree.SetPyData(category_item, CATEGORY)
+            for blocktype in category["list"]:
+                blocktype_item = self.TypeTree.AppendItem(category_item, blocktype["name"])
+                self.TypeTree.SetPyData(blocktype_item, BLOCK)
+
+    def SetMinBlockSize(self, size):
+        self.MinBlockSize = size
+
+    def SetValues(self, values):
+        for name, value in values.items():
+            if name == "type":
+                item = self.FindTreeItem(self.TypeTree.GetRootItem(), value)
+                if item:
+                    self.TypeTree.SelectItem(item)
+            elif name == "name":
+                self.Name.SetValue(value)
+            elif name == "extension":
+                self.Inputs.SetValue(value)
+        self.RefreshPreview()
+
+    def GetValues(self):
+        values = {}
+        values["type"] = self.TypeTree.GetItemText(self.TypeTree.GetSelection())
+        if self.Name.GetValue() != "":
+            values["name"] = self.Name.GetValue()
+        values["width"], values["height"] = self.Block.GetSize()
+        values["extension"] = self.Inputs.GetValue()
+        return values
+
+    def OnTypeTreeItemSelected(self, event):
+        self.Name.SetValue("")
+        selected = event.GetItem()
+        if self.TypeTree.GetPyData(selected) != CATEGORY:
+            blocktype = GetBlockType(self.TypeTree.GetItemText(selected))
+            if blocktype:
+                self.Inputs.SetValue(len(blocktype["inputs"]))
+                self.Inputs.Enable(blocktype["extensible"])
+                self.Name.Enable(blocktype["type"] != "function")
+                self.TypeDesc.SetValue(blocktype["comment"])
+                wxCallAfter(self.RefreshPreview)
+            else:
+                self.Name.Enable(False)
+                self.Inputs.Enable(False)
+                self.Inputs.SetValue(2)
+                self.TypeDesc.SetValue("")
+                wxCallAfter(self.ErasePreview)
+        else:
+            self.Name.Enable(False)
+            self.Inputs.Enable(False)
+            self.Inputs.SetValue(2)
+            self.TypeDesc.SetValue("")
+            wxCallAfter(self.ErasePreview)
+        event.Skip()
+
+    def OnNameChanged(self, event):
+        if self.Name.IsEnabled():
+            self.RefreshPreview()
+        event.Skip()
+    
+    def OnInputsChanged(self, event):
+        if self.Inputs.IsEnabled():
+            self.RefreshPreview()
+        event.Skip()
+    
+    def ErasePreview(self):
+        dc = wxClientDC(self.Preview)
+        dc.Clear()
+        self.Block = None
+        
+    def RefreshPreview(self):
+        dc = wxClientDC(self.Preview)
+        dc.Clear()
+        item = self.TypeTree.GetSelection()
+        if self.TypeTree.GetPyData(item) == CATEGORY:
+            self.Block = None
+        else:
+            blocktype = self.TypeTree.GetItemText(item)
+            if blocktype:
+                self.Block = FBD_Block(self.Preview, blocktype, self.Name.GetValue(), extension = self.Inputs.GetValue())
+                width, height = self.MinBlockSize
+                min_width, min_height = self.Block.GetMinSize()
+                width, height = max(min_width, width), max(min_height, height)
+                self.Block.SetSize(width, height)
+                clientsize = self.Preview.GetClientSize()
+                x = (clientsize.width - width) / 2
+                y = (clientsize.height - height) / 2
+                self.Block.SetPosition(x, y)
+                self.Block.Draw(dc)
+            else:
+                self.Block = None
+
+    def OnPaint(self, event):
+        if self.Block:
+            self.RefreshPreview()
+
+
+#-------------------------------------------------------------------------------
+#                          Create New Variable Dialog
+#-------------------------------------------------------------------------------
+
+[wxID_VARIABLEPROPERTIESDIALOG, wxID_VARIABLEPROPERTIESDIALOGMAINPANEL, 
+ wxID_VARIABLEPROPERTIESDIALOGNAME, wxID_VARIABLEPROPERTIESDIALOGCLASS, 
+ wxID_VARIABLEPROPERTIESDIALOGPREVIEW, wxID_VARIABLEPROPERTIESDIALOGSTATICTEXT1,
+ wxID_VARIABLEPROPERTIESDIALOGSTATICTEXT2, wxID_VARIABLEPROPERTIESDIALOGSTATICTEXT3, 
+] = [wx.NewId() for _init_ctrls in range(8)]
+
+class VariablePropertiesDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_VARIABLEPROPERTIESDIALOG,
+              name='VariablePropertiesDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(400, 320), style=wx.DEFAULT_DIALOG_STYLE,
+              title='Variable Properties')
+        self.SetClientSize(wx.Size(400, 320))
+
+        self.MainPanel = wx.Panel(id=wxID_VARIABLEPROPERTIESDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(400, 280), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.staticText1 = wx.StaticText(id=wxID_VARIABLEPROPERTIESDIALOGSTATICTEXT1,
+              label='Class:', name='staticText1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(70, 17), style=0)
+
+        self.staticText2 = wx.StaticText(id=wxID_VARIABLEPROPERTIESDIALOGSTATICTEXT2,
+              label='Name:', name='staticText2', parent=self.MainPanel,
+              pos=wx.Point(204, 24), size=wx.Size(70, 17), style=0)
+
+        self.staticText3 = wx.StaticText(id=wxID_VARIABLEPROPERTIESDIALOGSTATICTEXT3,
+              label='Preview:', name='staticText3', parent=self.MainPanel,
+              pos=wx.Point(24, 78), size=wx.Size(100, 17), style=0)
+
+        self.Class = wx.Choice(id=wxID_VARIABLEPROPERTIESDIALOGCLASS,
+              name='Class', parent=self.MainPanel, pos=wx.Point(24, 48),
+              size=wx.Size(145, 24), style=0)
+        EVT_CHOICE(self, wxID_VARIABLEPROPERTIESDIALOGCLASS, self.OnClassChanged)
+        
+        self.Name = wx.Choice(id=wxID_VARIABLEPROPERTIESDIALOGNAME,
+              name='Name', parent=self.MainPanel, pos=wx.Point(204, 48),
+              size=wx.Size(145, 24), style=0)
+        EVT_CHOICE(self, wxID_VARIABLEPROPERTIESDIALOGNAME, self.OnNameChanged)
+
+        self.Preview = wx.Panel(id=wxID_VARIABLEPROPERTIESDIALOGPREVIEW,
+              name='Preview', parent=self.MainPanel, pos=wx.Point(24, 104),
+              size=wx.Size(350, 150), style=wx.TAB_TRAVERSAL|wx.SIMPLE_BORDER)
+        self.Preview.SetBackgroundColour(wxColour(255,255,255))
+
+        self._init_sizers()
+
+    def __init__(self, parent):
+        self._init_ctrls(parent)
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+        self.Variable = None
+        self.VarList = []
+        self.MinVariableSize = None
+        self.RefreshNameList()
+        
+        for choice in ["Input", "Output", "InOut"]:
+            self.Class.Append(choice)
+        self.Class.SetStringSelection("Input")
+        
+        EVT_PAINT(self, self.OnPaint)
+
+    def RefreshNameList(self):
+        selected = self.Name.GetStringSelection()
+        self.Name.Clear()
+        for name, var_type, value_type in self.VarList:
+            if var_type in ["Local","Temp"]:
+                self.Name.Append(name)
+            elif var_type == "Input" and self.Class.GetStringSelection() == "Input":
+                self.Name.Append(name)
+            elif var_type == "Output" and self.Class.GetStringSelection() == "Output":
+                self.Name.Append(name)
+            elif var_type == "InOut" and self.Class.GetStringSelection() == "InOut":
+                self.Name.Append(name)
+        if self.Name.FindString(selected) != wxNOT_FOUND:
+            self.Name.SetStringSelection(selected)
+        self.Name.Enable(self.Name.GetCount() > 0)
+            
+    def SetMinVariableSize(self, size):
+        self.MinVariableSize = size
+
+    def SetVariables(self, vars):
+        self.VarList = vars
+        self.RefreshNameList()
+
+    def SetValues(self, values):
+        for name, value in values.items():
+            if name == "type":
+                if value == INPUT:
+                    self.Class.SetStringSelection("Input")
+                if value == OUTPUT:
+                    self.Class.SetStringSelection("Output")
+                if value == INOUT:
+                    self.Class.SetStringSelection("InOut")
+            elif name == "name":
+                self.Name.SetStringSelection(value)
+        self.RefreshPreview()
+        
+    def GetValues(self):
+        values = {}
+        classtype = self.Class.GetStringSelection()
+        if classtype == "Input":
+            values["type"] = INPUT
+        elif classtype == "Output":
+            values["type"] = OUTPUT
+        elif classtype == "InOut":
+            values["type"] = INOUT
+        values["name"] = self.Name.GetStringSelection()
+        values["value_type"] = ""
+        for var_name, var_type, value_type in self.VarList:
+            if var_name == values["name"]:
+                values["value_type"] = value_type
+        values["width"], values["height"] = self.Variable.GetSize()
+        return values
+
+    def OnClassChanged(self, event):
+        self.RefreshNameList()
+        self.RefreshPreview()
+        event.Skip()
+
+    def OnNameChanged(self, event):
+        self.RefreshPreview()
+        event.Skip()
+        
+    def RefreshPreview(self):
+        dc = wxClientDC(self.Preview)
+        dc.Clear()
+        name = self.Name.GetStringSelection()
+        type = ""
+        for var_name, var_type, value_type in self.VarList:
+            if var_name == name:
+                type = value_type
+        classtype = self.Class.GetStringSelection()
+        if classtype == "Input":
+            self.Variable = FBD_Variable(self.Preview, INPUT, name, type)
+        elif classtype == "Output":
+            self.Variable = FBD_Variable(self.Preview, OUTPUT, name, type)
+        elif classtype == "InOut":
+            self.Variable = FBD_Variable(self.Preview, INOUT, name, type)
+        width, height = self.MinVariableSize
+        min_width, min_height = self.Variable.GetMinSize()
+        width, height = max(min_width, width), max(min_height, height)
+        self.Variable.SetSize(width, height)
+        clientsize = self.Preview.GetClientSize()
+        x = (clientsize.width - width) / 2
+        y = (clientsize.height - height) / 2
+        self.Variable.SetPosition(x, y)
+        self.Variable.Draw(dc)
+
+    def OnPaint(self, event):
+        self.RefreshPreview()
+
+#-------------------------------------------------------------------------------
+#                          Create New Connection Dialog
+#-------------------------------------------------------------------------------
+
+[wxID_CONNECTIONPROPERTIESDIALOG, wxID_CONNECTIONPROPERTIESDIALOGMAINPANEL, 
+ wxID_CONNECTIONPROPERTIESDIALOGNAME, wxID_CONNECTIONPROPERTIESDIALOGRADIOBUTTON1, 
+ wxID_CONNECTIONPROPERTIESDIALOGRADIOBUTTON2, wxID_CONNECTIONPROPERTIESDIALOGPREVIEW,
+ wxID_CONNECTIONPROPERTIESDIALOGSTATICTEXT1, wxID_CONNECTIONPROPERTIESDIALOGSTATICTEXT2, 
+ wxID_CONNECTIONPROPERTIESDIALOGSTATICTEXT3, 
+] = [wx.NewId() for _init_ctrls in range(9)]
+
+class ConnectionPropertiesDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_CONNECTIONPROPERTIESDIALOG,
+              name='ConnectionPropertiesDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(350, 220), style=wx.DEFAULT_DIALOG_STYLE,
+              title='Connection Properties')
+        self.SetClientSize(wx.Size(350, 220))
+
+        self.MainPanel = wx.Panel(id=wxID_CONNECTIONPROPERTIESDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(340, 360), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.staticText1 = wx.StaticText(id=wxID_CONNECTIONPROPERTIESDIALOGSTATICTEXT1,
+              label='Type:', name='staticText1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(70, 17), style=0)
+
+        self.staticText2 = wx.StaticText(id=wxID_CONNECTIONPROPERTIESDIALOGSTATICTEXT2,
+              label='Name:', name='staticText2', parent=self.MainPanel,
+              pos=wx.Point(24, 104), size=wx.Size(70, 17), style=0)
+
+        self.staticText3 = wx.StaticText(id=wxID_CONNECTIONPROPERTIESDIALOGSTATICTEXT3,
+              label='Preview:', name='staticText3', parent=self.MainPanel,
+              pos=wx.Point(174, 24), size=wx.Size(100, 17), style=0)
+
+        self.radioButton1 = wx.RadioButton(id=wxID_CONNECTIONPROPERTIESDIALOGRADIOBUTTON1,
+              label='Connector', name='radioButton1', parent=self.MainPanel,
+              pos=wx.Point(24, 48), size=wx.Size(114, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_CONNECTIONPROPERTIESDIALOGRADIOBUTTON1, self.OnTypeChanged)
+        self.radioButton1.SetValue(True)
+
+        self.radioButton2 = wx.RadioButton(id=wxID_CONNECTIONPROPERTIESDIALOGRADIOBUTTON2,
+              label='Continuation', name='radioButton2', parent=self.MainPanel, 
+              pos=wx.Point(24, 72), size=wx.Size(128, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_CONNECTIONPROPERTIESDIALOGRADIOBUTTON2, self.OnTypeChanged)
+        self.radioButton2.SetValue(False)
+        
+        self.Name = wx.TextCtrl(id=wxID_CONNECTIONPROPERTIESDIALOGNAME,
+              name='Name', parent=self.MainPanel, pos=wx.Point(24, 130),
+              size=wx.Size(145, 24), style=0)
+        EVT_TEXT(self, wxID_CONNECTIONPROPERTIESDIALOGNAME, self.OnNameChanged)
+
+        self.Preview = wx.Panel(id=wxID_CONNECTIONPROPERTIESDIALOGPREVIEW,
+              name='Preview', parent=self.MainPanel, pos=wx.Point(174, 48),
+              size=wx.Size(150, 100), style=wx.TAB_TRAVERSAL|wx.SIMPLE_BORDER)
+        self.Preview.SetBackgroundColour(wxColour(255,255,255))
+
+        self._init_sizers()
+
+    def __init__(self, parent):
+        self._init_ctrls(parent)
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+        self.Connection = None
+        self.MinConnectionSize = None
+        
+        EVT_PAINT(self, self.OnPaint)
+            
+    def SetMinConnectionSize(self, size):
+        self.MinConnectionSize = size
+        
+    def GetValues(self):
+        values = {}
+        if self.radioButton1.GetValue():
+            values["type"] = CONNECTOR
+        else:
+            values["type"] = CONTINUATION
+        values["name"] = self.Name.GetValue()
+        values["width"], values["height"] = self.Connection.GetSize()
+        return values
+
+    def OnTypeChanged(self, event):
+        self.RefreshPreview()
+        event.Skip()
+
+    def OnNameChanged(self, event):
+        self.RefreshPreview()
+        event.Skip()
+        
+    def RefreshPreview(self):
+        dc = wxClientDC(self.Preview)
+        dc.Clear()
+        if self.radioButton1.GetValue():
+            self.Connection = FBD_Connector(self.Preview, CONNECTOR, self.Name.GetValue())
+        else:
+            self.Connection = FBD_Connector(self.Preview, CONTINUATION, self.Name.GetValue())
+        width, height = self.MinConnectionSize
+        min_width, min_height = self.Connection.GetMinSize()
+        width, height = max(min_width, width), max(min_height, height)
+        self.Connection.SetSize(width, height)
+        clientsize = self.Preview.GetClientSize()
+        x = (clientsize.width - width) / 2
+        y = (clientsize.height - height) / 2
+        self.Connection.SetPosition(x, y)
+        self.Connection.Draw(dc)
+
+    def OnPaint(self, event):
+        self.RefreshPreview()
+
+
+#-------------------------------------------------------------------------------
+#                        Edit Ladder Element Properties Dialog
+#-------------------------------------------------------------------------------
+
+
+[wxID_LDELEMENTDIALOG, wxID_LDELEMENTDIALOGMAINPANEL, 
+ wxID_LDELEMENTDIALOGNAME, wxID_LDELEMENTDIALOGRADIOBUTTON1, 
+ wxID_LDELEMENTDIALOGRADIOBUTTON2, wxID_LDELEMENTDIALOGRADIOBUTTON3,
+ wxID_LDELEMENTDIALOGRADIOBUTTON4, wxID_LDELEMENTDIALOGPREVIEW,
+ wxID_LDELEMENTDIALOGSTATICTEXT1, wxID_LDELEMENTDIALOGSTATICTEXT2, 
+ wxID_LDELEMENTDIALOGSTATICTEXT3, 
+] = [wx.NewId() for _init_ctrls in range(11)]
+
+class LDElementDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt, title, labels):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_LDELEMENTDIALOG,
+              name='VariablePropertiesDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(350, 260), style=wx.DEFAULT_DIALOG_STYLE,
+              title=title)
+        self.SetClientSize(wx.Size(350, 260))
+
+        self.MainPanel = wx.Panel(id=wxID_LDELEMENTDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(340, 200), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.staticText1 = wx.StaticText(id=wxID_LDELEMENTDIALOGSTATICTEXT1,
+              label='Modifier:', name='staticText1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(70, 17), style=0)
+
+        self.staticText2 = wx.StaticText(id=wxID_LDELEMENTDIALOGSTATICTEXT2,
+              label='Name:', name='staticText2', parent=self.MainPanel,
+              pos=wx.Point(24, 150), size=wx.Size(70, 17), style=0)
+
+        self.staticText3 = wx.StaticText(id=wxID_LDELEMENTDIALOGSTATICTEXT3,
+              label='Preview:', name='staticText3', parent=self.MainPanel,
+              pos=wx.Point(174, 24), size=wx.Size(100, 17), style=0)
+
+        self.radioButton1 = wx.RadioButton(id=wxID_LDELEMENTDIALOGRADIOBUTTON1,
+              label=labels[0], name='radioButton1', parent=self.MainPanel,
+              pos=wx.Point(24, 48), size=wx.Size(114, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_LDELEMENTDIALOGRADIOBUTTON1, self.OnTypeChanged)
+        self.radioButton1.SetValue(True)
+
+        self.radioButton2 = wx.RadioButton(id=wxID_LDELEMENTDIALOGRADIOBUTTON2,
+              label=labels[1], name='radioButton2', parent=self.MainPanel, 
+              pos=wx.Point(24, 72), size=wx.Size(128, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_LDELEMENTDIALOGRADIOBUTTON2, self.OnTypeChanged)
+
+        self.radioButton3 = wx.RadioButton(id=wxID_LDELEMENTDIALOGRADIOBUTTON3,
+              label=labels[2], name='radioButton3', parent=self.MainPanel,
+              pos=wx.Point(24, 96), size=wx.Size(114, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_LDELEMENTDIALOGRADIOBUTTON3, self.OnTypeChanged)
+
+        self.radioButton4 = wx.RadioButton(id=wxID_LDELEMENTDIALOGRADIOBUTTON4,
+              label=labels[3], name='radioButton4', parent=self.MainPanel, 
+              pos=wx.Point(24, 120), size=wx.Size(128, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_LDELEMENTDIALOGRADIOBUTTON4, self.OnTypeChanged)
+
+        self.Name = wx.Choice(id=wxID_LDELEMENTDIALOGNAME,
+              name='Name', parent=self.MainPanel, pos=wx.Point(24, 174),
+              size=wx.Size(145, 24), style=0)
+        EVT_CHOICE(self, wxID_LDELEMENTDIALOGNAME, self.OnNameChanged)
+
+        self.Preview = wx.Panel(id=wxID_LDELEMENTDIALOGPREVIEW,
+              name='Preview', parent=self.MainPanel, pos=wx.Point(174, 48),
+              size=wx.Size(150, 150), style=wx.TAB_TRAVERSAL|wx.SIMPLE_BORDER)
+        self.Preview.SetBackgroundColour(wxColour(255,255,255))
+
+        self._init_sizers()
+
+    def __init__(self, parent, type):
+        self.Type = type
+        if type == "contact":
+            self._init_ctrls(parent, "Edit Contact Values", ['Normal','Negate','Rising Edge','Falling Edge'])
+            self.Element = LD_Contact(self.Preview, CONTACT_NORMAL, "")
+        elif type == "coil":
+            self._init_ctrls(parent, "Edit Coil Values", ['Normal','Negate','Set','Reset'])
+            self.Element = LD_Coil(self.Preview, COIL_NORMAL, "")
+        self.Element.SetPosition((150 - LD_ELEMENT_SIZE[0]) / 2, (150 - LD_ELEMENT_SIZE[1]) / 2)
+
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+
+        EVT_PAINT(self, self.OnPaint)
+
+    def SetElementSize(self, width, height):
+        min_width, min_height = self.Element.GetMinSize()
+        width, height = max(min_width, width), max(min_height, height)
+        self.Element.SetSize(width, height)
+        self.Element.SetPosition((150 - width) / 2, (150 - height) / 2)
+
+    def SetVariables(self, vars):
+        self.Name.Clear()
+        for name in vars:
+            self.Name.Append(name)
+        self.Name.Enable(self.Name.GetCount() > 0)
+
+    def SetValues(self, values):
+        for name, value in values.items():
+            if name == "name":
+                self.Element.SetName(value)
+                self.Name.SetStringSelection(value)
+            elif name == "type":
+                self.Element.SetType(value)
+                if self.Type == "contact":
+                    if value == CONTACT_NORMAL:
+                        self.radioButton1.SetValue(True)
+                    elif value == CONTACT_REVERSE:
+                        self.radioButton2.SetValue(True)
+                    elif value == CONTACT_RISING:
+                        self.radioButton3.SetValue(True)
+                    elif value == CONTACT_FALLING:
+                        self.radioButton4.SetValue(True)
+                elif self.Type == "coil":
+                    if value == COIL_NORMAL:
+                        self.radioButton1.SetValue(True)
+                    elif value == COIL_REVERSE:
+                        self.radioButton2.SetValue(True)
+                    elif value == COIL_SET:
+                        self.radioButton3.SetValue(True)
+                    elif value == COIL_RESET:
+                        self.radioButton4.SetValue(True)
+
+    def GetValues(self):
+        values = {}
+        values["name"] = self.Element.GetName()
+        values["type"] = self.Element.GetType()
+        values["width"], values["height"] = self.Element.GetSize()
+        return values
+
+    def OnTypeChanged(self, event):
+        if self.Type == "contact":
+            if self.radioButton1.GetValue():
+                self.Element.SetType(CONTACT_NORMAL)
+            elif self.radioButton2.GetValue():
+                self.Element.SetType(CONTACT_REVERSE)
+            elif self.radioButton3.GetValue():
+                self.Element.SetType(CONTACT_RISING)
+            elif self.radioButton4.GetValue():
+                self.Element.SetType(CONTACT_FALLING)
+        elif self.Type == "coil":
+            if self.radioButton1.GetValue():
+                self.Element.SetType(COIL_NORMAL)
+            elif self.radioButton2.GetValue():
+                self.Element.SetType(COIL_REVERSE)
+            elif self.radioButton3.GetValue():
+                self.Element.SetType(COIL_SET)
+            elif self.radioButton4.GetValue():
+                self.Element.SetType(COIL_RESET)
+        self.RefreshPreview()
+        event.Skip()
+
+    def OnNameChanged(self, event):
+        self.Element.SetName(self.Name.GetStringSelection())
+        self.RefreshPreview()
+        event.Skip()
+
+    def RefreshPreview(self):
+        dc = wxClientDC(self.Preview)
+        dc.Clear()
+        self.Element.Draw(dc)
+
+    def OnPaint(self, event):
+        self.RefreshPreview()
+        event.Skip()
+
+
+#-------------------------------------------------------------------------------
+#                      Edit Ladder Power Rail Properties Dialog
+#-------------------------------------------------------------------------------
+
+
+[wxID_LDPOWERRAILDIALOG, wxID_LDPOWERRAILDIALOGMAINPANEL, 
+ wxID_LDPOWERRAILDIALOGTYPE, wxID_LDPOWERRAILDIALOGRADIOBUTTON1, 
+ wxID_LDPOWERRAILDIALOGRADIOBUTTON2, wxID_LDPOWERRAILDIALOGPREVIEW,
+ wxID_LDPOWERRAILDIALOGSTATICTEXT1, wxID_LDPOWERRAILDIALOGSTATICTEXT2, 
+ wxID_LDPOWERRAILDIALOGSTATICTEXT3, wxID_LDPOWERRAILDIALOGPINNUMBER,
+] = [wx.NewId() for _init_ctrls in range(10)]
+
+class LDPowerRailDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_LDPOWERRAILDIALOG,
+              name='PowerRailDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(350, 260), style=wx.DEFAULT_DIALOG_STYLE,
+              title='Power Rail Properties')
+        self.SetClientSize(wx.Size(350, 260))
+
+        self.MainPanel = wx.Panel(id=wxID_LDPOWERRAILDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(340, 200), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.staticText1 = wx.StaticText(id=wxID_LDPOWERRAILDIALOGSTATICTEXT1,
+              label='Type:', name='staticText1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(70, 17), style=0)
+
+        self.staticText2 = wx.StaticText(id=wxID_LDPOWERRAILDIALOGSTATICTEXT2,
+              label='Pin number:', name='staticText2', parent=self.MainPanel,
+              pos=wx.Point(24, 100), size=wx.Size(70, 17), style=0)
+
+        self.staticText3 = wx.StaticText(id=wxID_LDPOWERRAILDIALOGSTATICTEXT3,
+              label='Preview:', name='staticText3', parent=self.MainPanel,
+              pos=wx.Point(174, 24), size=wx.Size(100, 17), style=0)
+
+        self.radioButton1 = wx.RadioButton(id=wxID_LDPOWERRAILDIALOGRADIOBUTTON1,
+              label='Left PowerRail', name='radioButton1', parent=self.MainPanel,
+              pos=wx.Point(24, 48), size=wx.Size(114, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_LDPOWERRAILDIALOGRADIOBUTTON1, self.OnTypeChanged)
+        self.radioButton1.SetValue(True)
+
+        self.radioButton2 = wx.RadioButton(id=wxID_LDPOWERRAILDIALOGRADIOBUTTON2,
+              label='Right PowerRail', name='radioButton2', parent=self.MainPanel, 
+              pos=wx.Point(24, 72), size=wx.Size(128, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_LDPOWERRAILDIALOGRADIOBUTTON2, self.OnTypeChanged)
+
+        self.PinNumber = wx.SpinCtrl(id=wxID_LDPOWERRAILDIALOGPINNUMBER,
+              name='PinNumber', parent=self.MainPanel, pos=wx.Point(24, 124),
+              size=wx.Size(145, 24), style=wxSP_ARROW_KEYS, min=1, max=20)
+        EVT_SPINCTRL(self, wxID_LDPOWERRAILDIALOGPINNUMBER, self.OnPinNumberChanged)
+
+        self.Preview = wx.Panel(id=wxID_LDPOWERRAILDIALOGPREVIEW,
+              name='Preview', parent=self.MainPanel, pos=wx.Point(174, 48),
+              size=wx.Size(150, 150), style=wx.TAB_TRAVERSAL|wx.SIMPLE_BORDER)
+        self.Preview.SetBackgroundColour(wxColour(255,255,255))
+
+        self._init_sizers()
+
+    def __init__(self, parent, type = LEFTRAIL, number = 1):
+        self._init_ctrls(parent)
+        self.Type = type
+        if type == LEFTRAIL:
+            self.radioButton1.SetValue(True)
+        elif type == RIGHTRAIL:
+            self.radioButton2.SetValue(True)
+        self.PinNumber.SetValue(number)
+        
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+
+        self.PowerRailMinSize = (0, 0)
+        self.PowerRail = None
+
+        EVT_PAINT(self, self.OnPaint)
+
+    def SetMinSize(self, size):
+        self.PowerRailMinSize = size
+        self.RefreshPreview()
+
+    def GetValues(self):
+        values = {}
+        values["type"] = self.Type
+        values["number"] = self.PinNumber.GetValue()
+        values["width"], values["height"] = self.PowerRail.GetSize()
+        return values
+
+    def OnTypeChanged(self, event):
+        if self.radioButton1.GetValue():
+            self.Type = LEFTRAIL
+        elif self.radioButton2.GetValue():
+            self.Type = RIGHTRAIL
+        self.RefreshPreview()
+        event.Skip()
+
+    def OnPinNumberChanged(self, event):
+        self.RefreshPreview()
+        event.Skip()
+
+    def RefreshPreview(self):
+        dc = wxClientDC(self.Preview)
+        dc.Clear()
+        self.PowerRail = LD_PowerRail(self.Preview, self.Type, connectors = [True for i in xrange(self.PinNumber.GetValue())])
+        min_width, min_height = self.PowerRail.GetMinSize()
+        width, height = max(min_width, self.PowerRailMinSize[0]), max(min_height, self.PowerRailMinSize[1])
+        self.PowerRail.SetSize(width, height)
+        self.PowerRail.RefreshConnectors()
+        self.PowerRail.SetPosition((150 - width) / 2, (150 - height) / 2)
+        self.PowerRail.Draw(dc)
+
+    def OnPaint(self, event):
+        self.RefreshPreview()
+        event.Skip()
+
+
+#-------------------------------------------------------------------------------
+#                          Edit Transition Content Dialog
+#-------------------------------------------------------------------------------
+
+[wxID_TRANSITIONCONTENTDIALOG, wxID_TRANSITIONCONTENTDIALOGMAINPANEL, 
+ wxID_TRANSITIONCONTENTDIALOGREFERENCE, wxID_TRANSITIONCONTENTDIALOGINLINE, 
+ wxID_TRANSITIONCONTENTDIALOGRADIOBUTTON1, wxID_TRANSITIONCONTENTDIALOGRADIOBUTTON2, 
+] = [wx.NewId() for _init_ctrls in range(6)]
+
+class TransitionContentDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_TRANSITIONCONTENTDIALOG,
+              name='ProjectDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(300, 200), style=wx.DEFAULT_DIALOG_STYLE,
+              title='Edit transition')
+        self.SetClientSize(wx.Size(300, 200))
+
+        self.MainPanel = wx.Panel(id=wxID_TRANSITIONCONTENTDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(300, 200), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.radioButton1 = wx.RadioButton(id=wxID_TRANSITIONCONTENTDIALOGRADIOBUTTON1,
+              label='Reference', name='radioButton1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(114, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_TRANSITIONCONTENTDIALOGRADIOBUTTON1, self.OnTypeChanged)
+        self.radioButton1.SetValue(True)
+
+        self.Reference = wx.Choice(id=wxID_TRANSITIONCONTENTDIALOGREFERENCE,
+              name='Reference', parent=self.MainPanel, pos=wx.Point(48, 48), 
+              size=wx.Size(200, 24), style=0)
+
+        self.radioButton2 = wx.RadioButton(id=wxID_TRANSITIONCONTENTDIALOGRADIOBUTTON2,
+              label='Inline', name='radioButton2', parent=self.MainPanel,
+              pos=wx.Point(24, 72), size=wx.Size(114, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_TRANSITIONCONTENTDIALOGRADIOBUTTON2, self.OnTypeChanged)
+        self.radioButton2.SetValue(False)
+
+        self.Inline = wx.TextCtrl(id=wxID_TRANSITIONCONTENTDIALOGINLINE,
+              name='Inline', parent=self.MainPanel, pos=wx.Point(48, 96),
+              size=wx.Size(200, 24), style=0)
+
+        self._init_sizers()
+
+    def __init__(self, parent):
+        self._init_ctrls(parent)
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+        
+        EVT_BUTTON(self, self.ButtonSizer.GetAffirmativeButton().GetId(), self.OnOK)
+    
+    def OnOK(self, event):
+        error = []
+        if self.radioButton1.GetValue() and self.Reference.GetStringSelection() == "":
+            error.append("Reference")
+        if self.radioButton2.GetValue() and self.Inline.GetValue() == "":
+            error.append("Inline")
+        if len(error) > 0:
+            text = ""
+            for i, item in enumerate(error):
+                if i == 0:
+                    text += item
+                elif i == len(error) - 1:
+                    text += " and %s"%item
+                else:
+                    text += ", %s"%item 
+            message = wxMessageDialog(self, "Form isn't complete. %s must be filled!"%text, "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        else:
+            self.EndModal(wxID_OK)
+
+    def OnTypeChanged(self, event):
+        if self.radioButton1.GetValue():
+            self.Reference.Enable(True)
+            self.Inline.Enable(False)
+        else:
+            self.Reference.Enable(False)
+            self.Inline.Enable(True)
+        event.Skip()
+
+    def SetTransitions(self, transitions):
+        for transition in transitions:
+            self.Reference.Append(transition)
+
+    def SetValues(self, values):
+        if values["type"] == "reference":
+            self.radioButton1.SetValue(True)
+            self.radioButton2.SetValue(False)
+            self.Reference.Enable(True)
+            self.Inline.Enable(False)
+            self.Reference.SetStringSelection(values["value"])
+        elif values["type"] == "inline":
+            self.radioButton1.SetValue(False)
+            self.radioButton2.SetValue(True)
+            self.Reference.Enable(False)
+            self.Inline.Enable(True)
+            self.Inline.SetValue(values["value"])
+                
+    def GetValues(self):
+        values = {}
+        if self.radioButton1.GetValue():
+            values["type"] = "reference"
+            values["value"] = self.Reference.GetStringSelection()
+        else:
+            values["type"] = "inline"
+            values["value"] = self.Inline.GetValue()
+        return values
+
+#-------------------------------------------------------------------------------
+#                         Create New Divergence Dialog
+#-------------------------------------------------------------------------------
+
+[wxID_DIVERGENCECREATEDIALOG, wxID_DIVERGENCECREATEDIALOGMAINPANEL, 
+ wxID_DIVERGENCECREATEDIALOGRADIOBUTTON1, wxID_DIVERGENCECREATEDIALOGRADIOBUTTON2,
+ wxID_DIVERGENCECREATEDIALOGRADIOBUTTON3, wxID_DIVERGENCECREATEDIALOGRADIOBUTTON4, 
+ wxID_DIVERGENCECREATEDIALOGSEQUENCES, wxID_DIVERGENCECREATEDIALOGPREVIEW, 
+ wxID_DIVERGENCECREATEDIALOGSTATICTEXT1, wxID_DIVERGENCECREATEDIALOGSTATICTEXT2, 
+ wxID_DIVERGENCECREATEDIALOGSTATICTEXT3,  
+] = [wx.NewId() for _init_ctrls in range(11)]
+
+class DivergenceCreateDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_DIVERGENCECREATEDIALOG,
+              name='DivergencePropertiesDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(500, 300), style=wx.DEFAULT_DIALOG_STYLE,
+              title='Create a new divergence or convergence')
+        self.SetClientSize(wx.Size(500, 260))
+
+        self.MainPanel = wx.Panel(id=wxID_DIVERGENCECREATEDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(600, 220), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.staticText1 = wx.StaticText(id=wxID_DIVERGENCECREATEDIALOGSTATICTEXT1,
+              label='Type:', name='staticText1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(200, 17), style=0)
+
+        self.radioButton1 = wx.RadioButton(id=wxID_DIVERGENCECREATEDIALOGRADIOBUTTON1,
+              label='Selection Divergence', name='radioButton1', parent=self.MainPanel,
+              pos=wx.Point(24, 48), size=wx.Size(200, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_DIVERGENCECREATEDIALOGRADIOBUTTON1, self.OnTypeChanged)
+        self.radioButton1.SetValue(True)
+
+        self.radioButton2 = wx.RadioButton(id=wxID_DIVERGENCECREATEDIALOGRADIOBUTTON2,
+              label='Selection Convergence', name='radioButton2', parent=self.MainPanel, 
+              pos=wx.Point(24, 72), size=wx.Size(200, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_DIVERGENCECREATEDIALOGRADIOBUTTON2, self.OnTypeChanged)
+        self.radioButton2.SetValue(False)
+
+        self.radioButton3 = wx.RadioButton(id=wxID_DIVERGENCECREATEDIALOGRADIOBUTTON3,
+              label='Simultaneous Divergence', name='radioButton3', parent=self.MainPanel,
+              pos=wx.Point(24, 96), size=wx.Size(200, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_DIVERGENCECREATEDIALOGRADIOBUTTON3, self.OnTypeChanged)
+        self.radioButton3.SetValue(False)
+
+        self.radioButton4 = wx.RadioButton(id=wxID_DIVERGENCECREATEDIALOGRADIOBUTTON4,
+              label='Simultaneous Convergence', name='radioButton4', parent=self.MainPanel, 
+              pos=wx.Point(24, 120), size=wx.Size(200, 24), style=0)
+        EVT_RADIOBUTTON(self, wxID_DIVERGENCECREATEDIALOGRADIOBUTTON4, self.OnTypeChanged)
+        self.radioButton4.SetValue(False)
+
+        self.staticText2 = wx.StaticText(id=wxID_DIVERGENCECREATEDIALOGSTATICTEXT2,
+              label='Number of sequences:', name='staticText2', parent=self.MainPanel,
+              pos=wx.Point(24, 150), size=wx.Size(200, 17), style=0)
+
+        self.Sequences = wx.SpinCtrl(id=wxID_DIVERGENCECREATEDIALOGSEQUENCES,
+              name='Sequences', parent=self.MainPanel, pos=wx.Point(24, 174),
+              size=wx.Size(200, 24), style=0, min=2, max=20)
+        EVT_SPINCTRL(self, wxID_DIVERGENCECREATEDIALOGSEQUENCES, self.OnSequencesChanged)
+
+        self.staticText3 = wx.StaticText(id=wxID_DIVERGENCECREATEDIALOGSTATICTEXT3,
+              label='Preview:', name='staticText3', parent=self.MainPanel,
+              pos=wx.Point(250, 24), size=wx.Size(100, 17), style=0)
+
+        self.Preview = wx.Panel(id=wxID_DIVERGENCECREATEDIALOGPREVIEW,
+              name='Preview', parent=self.MainPanel, pos=wx.Point(250, 48),
+              size=wx.Size(225, 150), style=wx.TAB_TRAVERSAL|wx.SIMPLE_BORDER)
+        self.Preview.SetBackgroundColour(wxColour(255,255,255))
+
+        self._init_sizers()
+
+    def __init__(self, parent):
+        self._init_ctrls(parent)
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+        
+        self.Divergence = None
+        self.MinSize = (0, 0)
+        
+        EVT_PAINT(self, self.OnPaint)
+
+    def GetValues(self):
+        values = {}
+        if self.radioButton1.GetValue():
+            values["type"] = SELECTION_DIVERGENCE
+        elif self.radioButton2.GetValue():
+            values["type"] = SELECTION_CONVERGENCE
+        elif self.radioButton3.GetValue():
+            values["type"] = SIMULTANEOUS_DIVERGENCE
+        else:
+            values["type"] = SIMULTANEOUS_CONVERGENCE
+        values["number"] = self.Sequences.GetValue()
+        return values
+
+    def SetMinSize(self, size):
+        self.MinSize = size
+
+    def OnTypeChanged(self, event):
+        self.RefreshPreview()
+        event.Skip()
+
+    def OnSequencesChanged(self, event):
+        self.RefreshPreview()
+        event.Skip()
+        
+    def RefreshPreview(self):
+        dc = wxClientDC(self.Preview)
+        dc.Clear()
+        if self.radioButton1.GetValue():
+            self.Divergence = SFC_Divergence(self.Preview, SELECTION_DIVERGENCE, self.Sequences.GetValue())
+        elif self.radioButton2.GetValue():
+            self.Divergence = SFC_Divergence(self.Preview, SELECTION_CONVERGENCE, self.Sequences.GetValue())
+        elif self.radioButton3.GetValue():
+            self.Divergence = SFC_Divergence(self.Preview, SIMULTANEOUS_DIVERGENCE, self.Sequences.GetValue())
+        else:
+            self.Divergence = SFC_Divergence(self.Preview, SIMULTANEOUS_CONVERGENCE, self.Sequences.GetValue())
+        width, height = self.Divergence.GetSize()
+        min_width, min_height = max(width, self.MinSize[0]), max(height, self.MinSize[1])
+        self.Divergence.SetSize(min_width, min_height)
+        clientsize = self.Preview.GetClientSize()
+        x = (clientsize.width - min_width) / 2
+        y = (clientsize.height - min_height) / 2
+        self.Divergence.SetPosition(x, y)
+        self.Divergence.Draw(dc)
+
+    def OnPaint(self, event):
+        self.RefreshPreview()
+
+
+#-------------------------------------------------------------------------------
+#                            Action Block Dialog
+#-------------------------------------------------------------------------------
+
+class ActionTable(wxPyGridTableBase):
+    
+    """
+    A custom wxGrid Table using user supplied data
+    """
+    def __init__(self, parent, data, colnames):
+        # The base class must be initialized *first*
+        wxPyGridTableBase.__init__(self)
+        self.data = data
+        self.colnames = colnames
+        self.Parent = parent
+        # XXX
+        # we need to store the row length and collength to
+        # see if the table has changed size
+        self._rows = self.GetNumberRows()
+        self._cols = self.GetNumberCols()
+    
+    def GetNumberCols(self):
+        return len(self.colnames)
+        
+    def GetNumberRows(self):
+        return len(self.data)
+
+    def GetColLabelValue(self, col):
+        if col < len(self.colnames):
+            return self.colnames[col]
+
+    def GetRowLabelValues(self, row):
+        return row
+
+    def GetValue(self, row, col):
+        if row < self.GetNumberRows():
+            name = str(self.data[row].get(self.GetColLabelValue(col), ""))
+            return name
+    
+    def GetValueByName(self, row, colname):
+        return self.data[row].get(colname)
+
+    def SetValue(self, row, col, value):
+        if col < len(self.colnames):
+            self.data[row][self.GetColLabelValue(col)] = value
+        
+    def ResetView(self, grid):
+        """
+        (wxGrid) -> Reset the grid view.   Call this to
+        update the grid if rows and columns have been added or deleted
+        """
+        grid.BeginBatch()
+        for current, new, delmsg, addmsg in [
+            (self._rows, self.GetNumberRows(), wxGRIDTABLE_NOTIFY_ROWS_DELETED, wxGRIDTABLE_NOTIFY_ROWS_APPENDED),
+            (self._cols, self.GetNumberCols(), wxGRIDTABLE_NOTIFY_COLS_DELETED, wxGRIDTABLE_NOTIFY_COLS_APPENDED),
+        ]:
+            if new < current:
+                msg = wxGridTableMessage(self,delmsg,new,current-new)
+                grid.ProcessTableMessage(msg)
+            elif new > current:
+                msg = wxGridTableMessage(self,addmsg,new-current)
+                grid.ProcessTableMessage(msg)
+                self.UpdateValues(grid)
+        grid.EndBatch()
+
+        self._rows = self.GetNumberRows()
+        self._cols = self.GetNumberCols()
+        # update the column rendering scheme
+        self._updateColAttrs(grid)
+
+        # update the scrollbars and the displayed part of the grid
+        grid.AdjustScrollbars()
+        grid.ForceRefresh()
+
+    def UpdateValues(self, grid):
+        """Update all displayed values"""
+        # This sends an event to the grid table to update all of the values
+        msg = wxGridTableMessage(self, wxGRIDTABLE_REQUEST_VIEW_GET_VALUES)
+        grid.ProcessTableMessage(msg)
+
+    def _updateColAttrs(self, grid):
+        """
+        wxGrid -> update the column attributes to add the
+        appropriate renderer given the column name.
+
+        Otherwise default to the default renderer.
+        """
+        
+        for col in range(self.GetNumberCols()):
+            attr = wxGridCellAttr()
+            attr.SetAlignment(self.Parent.ColAlignements[col], wxALIGN_CENTRE)
+            grid.SetColAttr(col, attr)
+            grid.SetColSize(col, self.Parent.ColSizes[col])
+        
+        typelist = None
+        accesslist = None
+        for row in range(self.GetNumberRows()):
+            for col in range(self.GetNumberCols()):
+                editor = None
+                renderer = None
+                readonly = False
+                colname = self.GetColLabelValue(col)
+                if colname == "Qualifier":
+                    editor = wxGridCellChoiceEditor()
+                    editor.SetParameters(self.Parent.QualifierList)
+                if colname == "Duration":
+                    editor = wxGridCellTextEditor()
+                    renderer = wxGridCellStringRenderer()
+                    if self.Parent.DurationList[self.data[row]["Qualifier"]]:
+                        readonly = False
+                    else:
+                        readonly = True
+                        self.data[row]["Duration"] = ""
+                elif colname == "Type":
+                    editor = wxGridCellChoiceEditor()
+                    editor.SetParameters(self.Parent.TypeList)
+                elif colname == "Value":
+                    type = self.data[row]["Type"]
+                    if type == "Action":
+                        editor = wxGridCellChoiceEditor()
+                        editor.SetParameters(self.Parent.ActionList)
+                    elif type == "Variable":
+                        editor = wxGridCellChoiceEditor()
+                        editor.SetParameters(self.Parent.VariableList)
+                    elif type == "Inline":
+                        editor = wxGridCellTextEditor()
+                        renderer = wxGridCellStringRenderer()
+                elif colname == "Indicator":
+                    editor = wxGridCellChoiceEditor()
+                    editor.SetParameters(self.Parent.VariableList)
+                    
+                grid.SetCellEditor(row, col, editor)
+                grid.SetCellRenderer(row, col, renderer)
+                grid.SetReadOnly(row, col, readonly)
+                
+                grid.SetCellBackgroundColour(row, col, wxWHITE)
+    
+    def SetData(self, data):
+        self.data = data
+    
+    def GetData(self):
+        return self.data
+    
+    def GetCurrentIndex(self):
+        return self.CurrentIndex
+    
+    def SetCurrentIndex(self, index):
+        self.CurrentIndex = index
+    
+    def AppendRow(self, row_content):
+        self.data.append(row_content)
+
+    def RemoveRow(self, row_index):
+        self.data.pop(row_index)
+        
+    def MoveRow(self, row_index, move, grid):
+        new_index = max(0, min(row_index + move, len(self.data) - 1))
+        if new_index != row_index:
+            self.data.insert(new_index, self.data.pop(row_index))
+            grid.SetGridCursor(new_index, grid.GetGridCursorCol())
+
+    def Empty(self):
+        self.data = []
+        self.editors = []
+
+[wxID_ACTIONBLOCKDIALOG, wxID_ACTIONBLOCKDIALOGMAINPANEL, 
+ wxID_ACTIONBLOCKDIALOGVARIABLESGRID, wxID_ACTIONBLOCKDIALOGSTATICTEXT1, 
+ wxID_ACTIONBLOCKDIALOGADDBUTTON,wxID_ACTIONBLOCKDIALOGDELETEBUTTON, 
+ wxID_ACTIONBLOCKDIALOGUPBUTTON, wxID_ACTIONBLOCKDIALOGDOWNBUTTON, 
+] = [wx.NewId() for _init_ctrls in range(8)]
+
+class ActionBlockDialog(wx.Dialog):
+    def _init_coll_flexGridSizer1_Items(self, parent):
+        # generated method, don't edit
+
+        parent.AddWindow(self.MainPanel, 0, border=0, flag=0)
+
+    def _init_sizers(self):
+        # generated method, don't edit
+        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)
+
+        self._init_coll_flexGridSizer1_Items(self.flexGridSizer1)
+
+        self.SetSizer(self.flexGridSizer1)
+
+    def _init_ctrls(self, prnt):
+        # generated method, don't edit
+        wx.Dialog.__init__(self, id=wxID_ACTIONBLOCKDIALOG,
+              name='ActionBlockDialog', parent=prnt, pos=wx.Point(376, 223),
+              size=wx.Size(500, 300), style=wx.DEFAULT_DIALOG_STYLE,
+              title='Edit action block properties')
+        self.SetClientSize(wx.Size(500, 300))
+
+        self.MainPanel = wx.Panel(id=wxID_ACTIONBLOCKDIALOGMAINPANEL,
+              name='MainPanel', parent=self, pos=wx.Point(0, 0),
+              size=wx.Size(500, 300), style=wx.TAB_TRAVERSAL)
+        self.MainPanel.SetAutoLayout(True)
+
+        self.staticText1 = wx.StaticText(id=wxID_ACTIONBLOCKDIALOGSTATICTEXT1,
+              label='Actions:', name='staticText1', parent=self.MainPanel,
+              pos=wx.Point(24, 24), size=wx.Size(95, 17), style=0)
+
+        self.ActionsGrid = wx.grid.Grid(id=wxID_ACTIONBLOCKDIALOGVARIABLESGRID,
+              name='ActionsGrid', parent=self.MainPanel, pos=wx.Point(24, 44), 
+              size=wx.Size(450, 150), style=wxVSCROLL)
+        self.ActionsGrid.SetFont(wx.Font(12, 77, wx.NORMAL, wx.NORMAL, False,
+              'Sans'))
+        self.ActionsGrid.SetLabelFont(wx.Font(10, 77, wx.NORMAL, wx.NORMAL,
+              False, 'Sans'))
+        self.ActionsGrid.DisableDragGridSize()
+        self.ActionsGrid.EnableScrolling(False, True)
+        EVT_GRID_CELL_CHANGE(self.ActionsGrid, self.OnActionsGridCellChange)
+
+        self.AddButton = wx.Button(id=wxID_ACTIONBLOCKDIALOGADDBUTTON, label='Add',
+              name='AddButton', parent=self.MainPanel, pos=wx.Point(245, 204),
+              size=wx.Size(72, 32), style=0)
+        EVT_BUTTON(self, wxID_ACTIONBLOCKDIALOGADDBUTTON, self.OnAddButton)
+
+        self.DeleteButton = wx.Button(id=wxID_ACTIONBLOCKDIALOGDELETEBUTTON, label='Delete',
+              name='DeleteButton', parent=self.MainPanel, pos=wx.Point(325, 204),
+              size=wx.Size(72, 32), style=0)
+        EVT_BUTTON(self, wxID_ACTIONBLOCKDIALOGDELETEBUTTON, self.OnDeleteButton)
+
+        self.UpButton = wx.Button(id=wxID_ACTIONBLOCKDIALOGUPBUTTON, label='^',
+              name='UpButton', parent=self.MainPanel, pos=wx.Point(405, 204),
+              size=wx.Size(32, 32), style=0)
+        EVT_BUTTON(self, wxID_ACTIONBLOCKDIALOGUPBUTTON, self.OnUpButton)
+
+        self.DownButton = wx.Button(id=wxID_ACTIONBLOCKDIALOGDOWNBUTTON, label='v',
+              name='DownButton', parent=self.MainPanel, pos=wx.Point(445, 204),
+              size=wx.Size(32, 32), style=0)
+        EVT_BUTTON(self, wxID_ACTIONBLOCKDIALOGDOWNBUTTON, self.OnDownButton)
+
+        self._init_sizers()
+
+    def __init__(self, parent):
+        self._init_ctrls(parent)
+        self.ButtonSizer = self.CreateButtonSizer(wxOK|wxCANCEL|wxCENTRE)
+        self.flexGridSizer1.Add(self.ButtonSizer, 1, wxALIGN_RIGHT)
+        
+        self.DefaultValue = {"Qualifier" : "N", "Duration" : "", "Type" : "Action", "Value" : "", "Indicator" : ""}
+        self.Table = ActionTable(self, [], ["Qualifier","Duration","Type","Value","Indicator"])
+        self.TypeList = "Action,Variable,Inline"
+        self.ColSizes = [60, 90, 80, 110, 80]
+        self.ColAlignements = [wxALIGN_LEFT, wxALIGN_LEFT, wxALIGN_LEFT, wxALIGN_LEFT, wxALIGN_LEFT]
+        
+        self.ActionsGrid.SetTable(self.Table)
+        self.ActionsGrid.SetRowLabelSize(0)
+        
+        self.Table.ResetView(self.ActionsGrid)
+
+    def OnAddButton(self, event):
+        self.Table.AppendRow(self.DefaultValue.copy())
+        self.Table.ResetView(self.ActionsGrid)
+        event.Skip()
+
+    def OnDeleteButton(self, event):
+        row = self.ActionsGrid.GetGridCursorRow()
+        self.Table.RemoveRow(row)
+        self.Table.ResetView(self.ActionsGrid)
+        event.Skip()
+
+    def OnUpButton(self, event):
+        row = self.ActionsGrid.GetGridCursorRow()
+        self.Table.MoveRow(row, -1, self.ActionsGrid)
+        self.Table.ResetView(self.ActionsGrid)
+        event.Skip()
+
+    def OnDownButton(self, event):
+        row = self.ActionsGrid.GetGridCursorRow()
+        self.Table.MoveRow(row, 1, self.ActionsGrid)
+        self.Table.ResetView(self.ActionsGrid)
+        event.Skip()
+
+    def OnActionsGridCellChange(self, event):
+        self.Table.ResetView(self.ActionsGrid)
+        event.Skip()
+
+    def SetQualifierList(self, list):
+        self.QualifierList = ""
+        sep = ""
+        for qualifier in list.keys():
+            self.QualifierList += "%s%s"%(sep, qualifier)
+            sep = ","
+        self.DurationList = list
+
+    def SetVariableList(self, list):
+        self.VariableList = ""
+        sep = ""
+        for variable in list:
+            self.VariableList += "%s%s"%(sep, variable["Name"])
+            sep = ","
+
+    def SetActionList(self, list):
+        self.ActionList = ""
+        sep = ""
+        for action in list:
+            self.ActionList += "%s%s"%(sep, action)
+            sep = ","
+
+    def SetValues(self, actions):
+        for action in actions:
+            row = {"Qualifier" : action["qualifier"], "Value" : action["value"]}
+            if action["type"] == "reference":
+                if action["value"] in self.ActionList:
+                    row["Type"] = "Action"
+                elif action["value"] in self.VariableList:
+                    row["Type"] = "Variable"
+                else:
+                    row["Type"] = "Inline"
+            else:
+                row["Type"] = "Inline"
+            if "duration" in action:
+                row["Duration"] = action["duration"]
+            else:
+                row["Duration"] = ""
+            if "indicator" in action:
+                row["Indicator"] = action["indicator"]
+            else:
+                row["Indicator"] = ""
+            self.Table.AppendRow(row)
+        self.Table.ResetView(self.ActionsGrid)
+    
+    def GetValues(self):
+        values = []
+        for data in self.Table.GetData():
+            print data
+            action = {"qualifier" : data["Qualifier"], "value" : data["Value"]}
+            if data["Type"] in ["Action", "Variable"]:
+                action["type"] = "reference"
+            else:
+                action["type"] = "inline"
+            if data["Duration"] != "":
+                action["duration"] = data["Duration"]
+            if data["Indicator"] != "":
+                action["indicator"] = data["Indicator"]
+            values.append(action)
+        return values
+
+
+#-------------------------------------------------------------------------------
+#                          Edit Step Name Dialog
+#-------------------------------------------------------------------------------
+
+class StepNameDialog(wxTextEntryDialog):
+
+    def __init__(self, parent, message, caption = "Please enter text", defaultValue = "", 
+                       style = wxOK|wxCANCEL|wxCENTRE, pos = wxDefaultPosition):
+        wx.TextEntryDialog.__init__(self, parent, message, caption, defaultValue, style, pos)
+        
+        self.PouNames = []
+        self.Variables = []
+        self.StepNames = []
+        
+        EVT_BUTTON(self, self.GetSizer().GetItem(3).GetSizer().GetAffirmativeButton().GetId(), self.OnOK)
+        
+    def OnOK(self, event):
+        step_name = self.GetSizer().GetItem(1).GetWindow().GetValue()
+        if step_name == "":
+            message = wxMessageDialog(self, "You must type a name!", "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        elif not TestIdentifier(step_name):
+            message = wxMessageDialog(self, "\"%s\" is not a valid identifier!"%step_name, "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        elif step_name.upper() in IEC_KEYWORDS:
+            message = wxMessageDialog(self, "\"%s\" is a keyword. It can't be used!"%step_name, "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        elif step_name.upper() in self.PouNames:
+            message = wxMessageDialog(self, "A pou with \"%s\" as name exists!"%step_name, "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        elif step_name.upper() in self.Variables:
+            message = wxMessageDialog(self, "A variable with \"%s\" as name exists!"%step_name, "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        elif step_name.upper() in self.StepNames:
+            message = wxMessageDialog(self, "\"%s\" step already exists!"%step_name, "Error", wxOK|wxICON_ERROR)
+            message.ShowModal()
+            message.Destroy()
+        else:
+            self.EndModal(wxID_OK)
+
+    def SetPouNames(self, pou_names):
+        self.PouNames = [pou_name.upper() for pou_name in pou_names]
+
+    def SetVariables(self, variables):
+        self.Variables = [var["Name"].upper() for var in variables]
+
+    def SetStepNames(self, step_names):
+        self.StepNames = [step_name.upper() for step_name in step_names]
+