FBDViewer.py
changeset 27 dae55dd9ee14
parent 26 36d378bd852e
child 28 fc23e1f415d8
--- a/FBDViewer.py	Sat Jul 07 11:35:17 2007 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,905 +0,0 @@
-#!/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 *
-import wx
-
-from plcopen.structures import *
-from graphics.GraphicCommons import *
-from graphics.FBD_Objects import *
-from Viewer import *
-
-class FBD_Viewer(Viewer):
-    
-    def __init__(self, parent, window, controler):
-        Viewer.__init__(self, parent, window, controler)
-
-#-------------------------------------------------------------------------------
-#                          Mouse event functions
-#-------------------------------------------------------------------------------
-
-    def OnViewerLeftDown(self, event):
-        if self.Mode == MODE_SELECTION:
-            pos = event.GetPosition()
-            if event.ControlDown() and self.SelectedElement:
-                element = self.FindElement(pos, True)
-                if element:
-                    if isinstance(self.SelectedElement, Graphic_Group):
-                        self.SelectedElement.SetSelected(False)
-                        self.SelectedElement.SelectElement(element)
-                    elif self.SelectedElement:
-                        group = Graphic_Group(self)
-                        group.SelectElement(self.SelectedElement)
-                        group.SelectElement(element)
-                        self.SelectedElement = group
-                    elements = self.SelectedElement.GetElements()
-                    if len(elements) == 0:
-                        self.SelectedElement = element
-                    elif len(elements) == 1:
-                        self.SelectedElement = elements[0]
-                    self.SelectedElement.SetSelected(True)
-            else:
-                element = self.FindElement(pos)
-                if self.SelectedElement and self.SelectedElement != element:
-                    self.SelectedElement.SetSelected(False)
-                    self.SelectedElement = None
-                    self.Refresh()
-                if element:
-                    self.SelectedElement = element
-                    self.SelectedElement.OnLeftDown(event, self.Scaling)
-                    self.Refresh()
-                else:
-                    self.rubberBand.Reset()
-                    self.rubberBand.OnLeftDown(event, self.Scaling)
-        elif self.Mode in [MODE_BLOCK,MODE_VARIABLE,MODE_CONNECTION,MODE_COMMENT]:
-            self.rubberBand.Reset()
-            self.rubberBand.OnLeftDown(event, self.Scaling)
-        elif self.Mode == MODE_WIRE:
-            pos = GetScaledEventPosition(event, self.Scaling)
-            connector = self.FindBlockConnector(pos)
-            if connector:
-                if (connector.GetDirection() == EAST):
-                    wire = Wire(self, [wxPoint(pos.x, pos.y), EAST], [wxPoint(pos.x, pos.y), WEST])
-                else:
-                    wire = Wire(self, [wxPoint(pos.x, pos.y), WEST], [wxPoint(pos.x, pos.y), EAST])
-                wire.oldPos = pos
-                wire.Handle = (HANDLE_POINT, 0)
-                wire.ProcessDragging(0, 0)
-                wire.Handle = (HANDLE_POINT, 1)
-                self.Wires.append(wire)
-                self.Elements.append(wire)
-                if self.SelectedElement:
-                    self.SelectedElement.SetSelected(False)
-                self.SelectedElement = wire
-            elif self.SelectedElement:
-                self.SelectedElement.SetSelected(False)
-                self.SelectedElement = None
-            self.Refresh()
-        event.Skip()
-
-    def OnViewerLeftUp(self, event):
-        if self.rubberBand.IsShown():
-            if self.Mode == MODE_SELECTION:
-                elements = self.SearchElements(self.rubberBand.GetCurrentExtent())
-                self.rubberBand.OnLeftUp(event, self.Scaling)
-                if len(elements) > 0:
-                    self.SelectedElement = Graphic_Group(self)
-                    self.SelectedElement.SetElements(elements)
-                    self.SelectedElement.SetSelected(True)
-                    self.Refresh()
-            elif self.Mode == MODE_BLOCK:
-                bbox = self.rubberBand.GetCurrentExtent()
-                self.rubberBand.OnLeftUp(event, self.Scaling)
-                wxCallAfter(self.AddNewBlock, bbox)
-            elif self.Mode == MODE_VARIABLE:
-                bbox = self.rubberBand.GetCurrentExtent()
-                self.rubberBand.OnLeftUp(event, self.Scaling)
-                wxCallAfter(self.AddNewVariable, bbox)
-            elif self.Mode == MODE_CONNECTION:
-                bbox = self.rubberBand.GetCurrentExtent()
-                self.rubberBand.OnLeftUp(event, self.Scaling)
-                wxCallAfter(self.AddNewConnection, bbox)
-            elif self.Mode == MODE_COMMENT:
-                bbox = self.rubberBand.GetCurrentExtent()
-                self.rubberBand.OnLeftUp(event, self.Scaling)
-                wxCallAfter(self.AddNewComment, bbox)
-        elif self.Mode == MODE_SELECTION and self.SelectedElement:
-            self.SelectedElement.OnLeftUp(event, self.Scaling)
-            wxCallAfter(self.SetCursor, wxNullCursor)
-            self.ReleaseMouse()
-            self.Refresh()
-        elif self.Mode == MODE_WIRE and self.SelectedElement:
-            pos = GetScaledEventPosition(event, self.Scaling)
-            connector = self.FindBlockConnector(pos, False)
-            if connector and connector != self.SelectedElement.StartConnected:
-                self.SelectedElement.ResetPoints()
-                self.SelectedElement.OnMotion(event, self.Scaling)
-                self.SelectedElement.GeneratePoints()
-                self.SelectedElement.RefreshModel()
-                self.SelectedElement.SetSelected(True)
-            else:
-                self.SelectedElement.Delete()
-                self.SelectedElement = None
-            self.Refresh()
-        if not self.SavedMode:
-            wxCallAfter(self.Parent.ResetCurrentMode)
-        event.Skip()
-    
-    def OnViewerRightUp(self, event):
-        pos = event.GetPosition()
-        element = self.FindElement(pos)
-        if element:
-            if self.SelectedElement and self.SelectedElement != element:
-                self.SelectedElement.SetSelected(False)
-            self.SelectedElement = element
-            self.SelectedElement.SetSelected(True)
-            self.SelectedElement.OnRightUp(event, self.Scaling)
-            wxCallAfter(self.SetCursor, wxNullCursor)
-            self.ReleaseMouse()
-            self.Refresh()
-        event.Skip()
-    
-    def OnViewerLeftDClick(self, event):
-        if self.Mode == MODE_SELECTION and self.SelectedElement:
-            self.SelectedElement.OnLeftDClick(event, self.Scaling)
-            self.Refresh()
-        event.Skip()
-    
-    def OnViewerMotion(self, event):
-        if self.rubberBand.IsShown():
-            self.rubberBand.OnMotion(event, self.Scaling)
-        elif self.Mode == MODE_SELECTION and self.SelectedElement:
-            self.SelectedElement.OnMotion(event, self.Scaling)
-            self.Refresh()
-        elif self.Mode == MODE_WIRE and self.SelectedElement:
-            pos = GetScaledEventPosition(event, self.Scaling)
-            connector = self.FindBlockConnector(pos, False)
-            if not connector or self.SelectedElement.EndConnected == None:
-                self.SelectedElement.ResetPoints()
-                self.SelectedElement.OnMotion(event, self.Scaling)
-                self.SelectedElement.GeneratePoints()
-                self.Refresh()
-        event.Skip()
-
-#-------------------------------------------------------------------------------
-#                          Keyboard event functions
-#-------------------------------------------------------------------------------
-
-    def OnChar(self, event):
-        keycode = event.GetKeyCode()
-        if self.Scaling:
-            scaling = self.Scaling
-        else:
-            scaling = (8, 8)
-        if keycode == WXK_DELETE and self.SelectedElement:
-            self.SelectedElement.Clean()
-            self.SelectedElement.Delete()
-            self.SelectedElement = None
-        elif keycode == WXK_LEFT and self.SelectedElement:
-            self.SelectedElement.Move(-scaling[0], 0)
-        elif keycode == WXK_RIGHT and self.SelectedElement:
-            self.SelectedElement.Move(scaling[0], 0)
-        elif keycode == WXK_UP and self.SelectedElement:
-            self.SelectedElement.Move(0, -scaling[1])
-        elif keycode == WXK_DOWN and self.SelectedElement:
-            self.SelectedElement.Move(0, scaling[1])
-        self.Refresh()
-        event.Skip()
-
-#-------------------------------------------------------------------------------
-#                          Adding element functions
-#-------------------------------------------------------------------------------
-
-    def AddNewBlock(self, bbox):
-        dialog = BlockPropertiesDialog(self.Parent)
-        dialog.SetBlockList(self.Controler.GetBlockTypes())
-        dialog.SetMinBlockSize((bbox.width, bbox.height))
-        if dialog.ShowModal() == wxID_OK:
-            id = self.GetNewId()
-            values = dialog.GetValues()
-            if "name" in values:
-                block = FBD_Block(self, values["type"], values["name"], id, values["extension"])
-            else:
-                block = FBD_Block(self, values["type"], "", id, values["extension"])
-            block.SetPosition(bbox.x, bbox.y)
-            block.SetSize(values["width"], values["height"])
-            self.Blocks.append(block)
-            self.Elements.append(block)
-            self.Controler.AddCurrentElementEditingBlock(id)
-            self.RefreshBlockModel(block)
-            self.Refresh()
-        dialog.Destroy()
-    
-    def AddNewVariable(self, bbox):
-        dialog = VariablePropertiesDialog(self.Parent)
-        dialog.SetMinVariableSize((bbox.width, bbox.height))
-        varlist = []
-        vars = self.Controler.GetCurrentElementEditingInterfaceVars()
-        if vars:
-            for var in vars:
-                varlist.append((var["Name"], var["Class"], var["Type"]))
-        returntype = self.Controler.GetCurrentElementEditingInterfaceReturnType()
-        if returntype:
-            varlist.append((self.Controler.GetCurrentElementEditingName(), "Output", returntype))
-        dialog.SetVariables(varlist)
-        if dialog.ShowModal() == wxID_OK:
-            id = self.GetNewId()
-            values = dialog.GetValues()
-            variable = FBD_Variable(self, values["type"], values["name"], values["value_type"], id)
-            variable.SetPosition(bbox.x, bbox.y)
-            variable.SetSize(values["width"], values["height"])
-            self.Blocks.append(variable)
-            self.Elements.append(variable)
-            self.Controler.AddCurrentElementEditingVariable(id, values["type"])
-            self.RefreshVariableModel(variable)
-            self.Refresh()
-        dialog.Destroy()
-
-    def AddNewConnection(self, bbox):
-        dialog = ConnectionPropertiesDialog(self.Parent)
-        dialog.SetMinConnectionSize((bbox.width, bbox.height))
-        if dialog.ShowModal() == wxID_OK:
-            id = self.GetNewId()
-            values = dialog.GetValues()
-            connection = FBD_Connection(self, values["type"], values["name"], id)
-            connection.SetPosition(bbox.x, bbox.y)
-            connection.SetSize(values["width"], values["height"])
-            self.Blocks.append(connection)
-            self.Elements.append(connection)
-            self.Controler.AddCurrentElementEditingConnection(id, values["type"])
-            self.RefreshConnectionModel(connection)
-            self.Refresh()
-        dialog.Destroy()
-
-    def AddNewComment(self, bbox):
-        dialog = wxTextEntryDialog(self.Parent, "Add a new comment", "Please enter comment text", "", wxOK|wxCANCEL|wxTE_MULTILINE)
-        if dialog.ShowModal() == wxID_OK:
-            value = dialog.GetValue()
-            id = self.GetNewId()
-            comment = Comment(self, value, id)
-            comment.SetPosition(bbox.x, bbox.y)
-            min_width, min_height = comment.GetMinSize()
-            comment.SetSize(max(min_width,bbox.width),max(min_height,bbox.height))
-            self.Elements.append(comment)
-            self.Controler.AddCurrentElementEditingComment(id)
-            self.RefreshCommentModel(comment)
-            self.Refresh()
-        dialog.Destroy()
-            
-#-------------------------------------------------------------------------------
-#                          Delete element functions
-#-------------------------------------------------------------------------------
-
-    def DeleteBlock(self, block):
-        wires = []
-        for output in block.GetConnectors()["outputs"]:
-            wires.extend([wire[0] for wire in output.GetWires()])
-        block.Clean()
-        self.Blocks.remove(block)
-        self.Elements.remove(block)
-        self.Controler.RemoveCurrentElementEditingInstance(block.GetId())
-        for wire in wires:
-            wire.RefreshModel()
-
-    def DeleteVariable(self, variable):
-        wires = []
-        if variable.GetType() == INPUT:
-            connector = variable.GetConnector()
-            wires.extend([wire[0] for wire in connector.GetWires()])
-        variable.Clean()
-        self.Blocks.remove(variable)
-        self.Elements.remove(variable)
-        self.Controler.RemoveCurrentElementEditingInstance(variable.GetId())
-        for wire in wires:
-            wire.RefreshModel()
-
-    def DeleteConnection(self, connection):
-        wires = []
-        if connection.GetType() == CONTINUATION:
-            connector = connection.GetConnector()
-            wires.extend([wire[0] for wire in connector.GetWires()])
-        connection.Clean()
-        self.Blocks.remove(connection)
-        self.Elements.remove(connection)
-        self.Controler.RemoveCurrentElementEditingInstance(connection.GetId())
-        for wire in wires:
-            wire.RefreshModel()
-
-    def DeleteComment(self, comment):
-        self.Elements.remove(comment)
-        self.Controler.RemoveCurrentElementEditingInstance(comment.GetId())
-
-    def DeleteWire(self, wire):
-        connected = wire.GetConnected()
-        wire.Clean()
-        self.Wires.remove(wire)
-        self.Elements.remove(wire)
-        for connector in connected:
-            connector.RefreshParentBlock()
-
-#-------------------------------------------------------------------------------
-#                          Edit element content functions
-#-------------------------------------------------------------------------------
-
-    def EditBlockContent(self, block):
-        dialog = BlockPropertiesDialog(self.Parent)
-        dialog.SetBlockList(self.Controler.GetBlockTypes())
-        dialog.SetMinBlockSize(block.GetSize())
-        values = {"name" : block.GetName(), "type" : block.GetType()}
-        values["extension"] = block.GetExtension()
-        dialog.SetValues(values)
-        if dialog.ShowModal() == wxID_OK:
-            values = dialog.GetValues()
-            if "name" in values:
-                block.SetName(values["name"])
-            block.SetExtension(values["extension"])
-            block.SetSize(values["width"], values["height"])
-            block.SetType(values["type"])
-            self.RefreshBlockModel(block)
-            self.Refresh()
-        dialog.Destroy()
-
-    def EditVariableContent(self, variable):
-        dialog = VariablePropertiesDialog(self.Parent)
-        dialog.SetMinVariableSize(variable.GetSize())
-        varlist = []
-        vars = self.Controler.GetCurrentElementEditingInterfaceVars()
-        if vars:
-            for var in vars:
-                varlist.append((var["Name"], var["Class"], var["Type"]))
-        returntype = self.Controler.GetCurrentElementEditingInterfaceReturnType()
-        if returntype:
-            varlist.append((self.Controler.GetCurrentElementEditingName(), "Output", returntype))
-        dialog.SetVariables(varlist)
-        values = {"name" : variable.GetName(), "type" : variable.GetType()}
-        dialog.SetValues(values)
-        if dialog.ShowModal() == wxID_OK:
-            old_type = variable.GetType()
-            values = dialog.GetValues()
-            variable.SetName(values["name"])
-            variable.SetType(values["type"], values["value_type"])
-            variable.SetSize(values["width"], values["height"])
-            if old_type != values["type"]:
-                id = variable.GetId()
-                self.Controler.RemoveCurrentElementEditingInstance(id)
-                self.Controler.AddCurrentElementEditingVariable(id, values["type"])
-            self.RefreshVariableModel(variable)
-            self.Refresh()
-        dialog.Destroy()
-
-#-------------------------------------------------------------------------------
-#                          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=0, 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","Output","InOut"]:
-                self.Name.Append(name)
-            elif var_type == "Input" and self.Class.GetStringSelection() == "Input":
-                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()
-