editors/SFCViewer.py
changeset 814 5743cbdff669
child 1347 533741e5075c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/editors/SFCViewer.py	Fri Sep 07 16:45:55 2012 +0200
@@ -0,0 +1,1016 @@
+#!/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) 2007: 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
+#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 types import *
+
+import wx
+
+from Viewer import *
+
+class SFC_Viewer(Viewer):
+    
+    def __init__(self, parent, tagname, window, controler, debug = False, instancepath = ""):
+        Viewer.__init__(self, parent, tagname, window, controler, debug, instancepath)
+        self.CurrentLanguage = "SFC"
+    
+    def ConnectConnectors(self, start, end):
+        startpoint = [start.GetPosition(False), start.GetDirection()]
+        endpoint = [end.GetPosition(False), end.GetDirection()]
+        wire = Wire(self, startpoint, endpoint)
+        self.AddWire(wire)
+        start.Connect((wire, 0), False)
+        end.Connect((wire, -1), False)
+        wire.ConnectStartPoint(None, start)
+        wire.ConnectEndPoint(None, end)
+        return wire
+    
+    def CreateTransition(self, connector, next = None):
+        previous = connector.GetParentBlock()
+        id = self.GetNewId()
+        transition = SFC_Transition(self, "reference", "", 0, id)
+        pos = connector.GetPosition(False)
+        transition.SetPosition(pos.x, pos.y + SFC_WIRE_MIN_SIZE)
+        transition_connectors = transition.GetConnectors()
+        wire = self.ConnectConnectors(transition_connectors["input"], connector)
+        if isinstance(previous, SFC_Divergence):
+            previous.RefreshConnectedPosition(connector)
+        else:
+            previous.RefreshOutputPosition()
+        wire.SetPoints([wx.Point(pos.x, pos.y + GetWireSize(previous)), wx.Point(pos.x, pos.y)])
+        self.AddBlock(transition)
+        self.Controler.AddEditedElementTransition(self.TagName, id)
+        self.RefreshTransitionModel(transition)
+        if next:
+            wire = self.ConnectConnectors(next, transition_connectors["output"])
+            pos = transition_connectors["output"].GetPosition(False)
+            next_block = next.GetParentBlock()
+            next_pos = next.GetPosition(False)
+            transition.RefreshOutputPosition((0, pos.y + SFC_WIRE_MIN_SIZE - next_pos.y))
+            wire.SetPoints([wx.Point(pos.x, pos.y + SFC_WIRE_MIN_SIZE), wx.Point(pos.x, pos.y)])
+            if isinstance(next_block, SFC_Divergence):
+                next_block.RefreshPosition()
+            transition.RefreshOutputModel(True)
+        return transition
+    
+    def RemoveTransition(self, transition):
+        connectors = transition.GetConnectors()
+        input_wires = connectors["input"].GetWires()
+        if len(input_wires) != 1:
+            return
+        input_wire = input_wires[0][0]
+        previous = input_wire.EndConnected
+        input_wire.Clean()
+        self.RemoveWire(input_wire)
+        output_wires = connectors["output"].GetWires()
+        if len(output_wires) != 1:
+            return
+        output_wire = output_wires[0][0]
+        next = output_wire.StartConnected
+        output_wire.Clean()
+        self.RemoveWire(output_wire)
+        transition.Clean()
+        self.RemoveBlock(transition)
+        self.Controler.RemoveEditedElementInstance(self.TagName, transition.GetId())
+        wire = self.ConnectConnectors(next, previous)
+        return wire
+    
+    def CreateStep(self, name, connector, next = None):
+        previous = connector.GetParentBlock()
+        id = self.GetNewId()
+        step = SFC_Step(self, name, False, id)
+        if next:
+            step.AddOutput()
+        min_width, min_height = step.GetMinSize()
+        pos = connector.GetPosition(False)
+        step.SetPosition(pos.x, pos.y + SFC_WIRE_MIN_SIZE)
+        step.SetSize(min_width, min_height)
+        step_connectors = step.GetConnectors()
+        wire = self.ConnectConnectors(step_connectors["input"], connector)
+        if isinstance(previous, SFC_Divergence):
+            previous.RefreshConnectedPosition(connector)
+        else:
+            previous.RefreshOutputPosition()
+        wire.SetPoints([wx.Point(pos.x, pos.y + GetWireSize(previous)), wx.Point(pos.x, pos.y)])
+        self.AddBlock(step)
+        self.Controler.AddEditedElementStep(self.TagName, id)
+        self.RefreshStepModel(step)
+        if next:
+            wire = self.ConnectConnectors(next, step_connectors["output"])
+            pos = step_connectors["output"].GetPosition(False)
+            next_block = next.GetParentBlock()
+            next_pos = next.GetPosition(False)
+            step.RefreshOutputPosition((0, pos.y + SFC_WIRE_MIN_SIZE - next_pos.y))
+            wire.SetPoints([wx.Point(pos.x, pos.y + SFC_WIRE_MIN_SIZE), wx.Point(pos.x, pos.y)])
+            if isinstance(next_block, SFC_Divergence):
+                next_block.RefreshPosition()
+            step.RefreshOutputModel(True)
+        return step
+
+    def RemoveStep(self, step):
+        connectors = step.GetConnectors()
+        if connectors["input"]:
+            input_wires = connectors["input"].GetWires()
+            if len(input_wires) != 1:
+                return
+            input_wire = input_wires[0][0]
+            previous = input_wire.EndConnected
+            input_wire.Clean()
+            self.RemoveWire(input_wire)
+        else:
+            previous = None
+        if connectors["output"]:
+            output_wires = connectors["output"].GetWires()
+            if len(output_wires) != 1:
+                return
+            output_wire = output_wires[0][0]
+            next = output_wire.StartConnected
+            output_wire.Clean()
+            self.RemoveWire(output_wire)
+        else:
+            next = None
+        action = step.GetActionConnected()
+        if action:
+            self.DeleteActionBlock(action.GetParentBlock())
+        step.Clean()
+        self.RemoveBlock(step)
+        self.Controler.RemoveEditedElementInstance(self.TagName, step.GetId())
+        if next and previous:
+            wire = self.ConnectConnectors(next, previous)
+            return wire
+        else:
+            return None
+
+#-------------------------------------------------------------------------------
+#                          Mouse event functions
+#-------------------------------------------------------------------------------
+
+    def OnViewerLeftDown(self, event):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.OnViewerLeftDown(self, event)
+        elif self.Mode == MODE_SELECTION:
+            if event.ShiftDown() and not event.ControlDown() and self.SelectedElement is not None:
+                element = self.FindElement(event, True)
+                if element and not self.IsWire(element):
+                    if isinstance(self.SelectedElement, Graphic_Group):
+                        self.SelectedElement.SelectElement(element)
+                    else:
+                        group = Graphic_Group(self)
+                        self.SelectedElement.SetSelected(False)
+                        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(event)
+                if self.SelectedElement and self.SelectedElement != element:
+                    if self.IsWire(self.SelectedElement):
+                        self.SelectedElement.SetSelectedSegment(None)
+                    else:
+                        self.SelectedElement.SetSelected(False)
+                    self.SelectedElement = None
+                if element:
+                    self.SelectedElement = element
+                    self.SelectedElement.OnLeftDown(event, self.GetLogicalDC(), self.Scaling)
+                    self.SelectedElement.Refresh()
+                else:
+                    self.rubberBand.Reset()
+                    self.rubberBand.OnLeftDown(event, self.GetLogicalDC(), self.Scaling)
+        elif self.Mode == MODE_COMMENT:
+            self.rubberBand.Reset()
+            self.rubberBand.OnLeftDown(event, self.GetLogicalDC(), self.Scaling)
+        event.Skip()
+
+    def OnViewerLeftUp(self, event):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.OnViewerLeftUp(self, event)
+        elif self.rubberBand.IsShown():
+            if self.Mode == MODE_SELECTION:
+                elements = self.SearchElements(self.rubberBand.GetCurrentExtent())
+                self.rubberBand.OnLeftUp(event, self.GetLogicalDC(), self.Scaling)
+                if len(elements) > 0:
+                    self.SelectedElement = Graphic_Group(self)
+                    self.SelectedElement.SetElements(elements)
+                    self.SelectedElement.SetSelected(True)
+            elif self.Mode == MODE_COMMENT:
+                bbox = self.rubberBand.GetCurrentExtent()
+                self.rubberBand.OnLeftUp(event, self.GetLogicalDC(), self.Scaling)
+                wx.CallAfter(self.AddComment, bbox)
+        elif self.Mode == MODE_INITIALSTEP:
+            wx.CallAfter(self.AddInitialStep, GetScaledEventPosition(event, self.GetLogicalDC(), self.Scaling))
+        elif self.Mode == MODE_SELECTION and self.SelectedElement:
+            if self.IsWire(self.SelectedElement):
+                self.SelectedElement.SetSelectedSegment(0)
+            else:
+                self.SelectedElement.OnLeftUp(event, self.GetLogicalDC(), self.Scaling)
+                self.SelectedElement.Refresh()
+            wx.CallAfter(self.SetCurrentCursor, 0)
+        elif self.Mode == MODE_WIRE and self.SelectedElement:
+            self.SelectedElement.ResetPoints()
+            self.SelectedElement.OnMotion(event, self.GetLogicalDC(), self.Scaling)
+            self.SelectedElement.GeneratePoints()
+            self.SelectedElement.RefreshModel()
+            self.SelectedElement.SetSelected(True)
+        event.Skip()
+    
+    def OnViewerRightUp(self, event):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.OnViewerRightUp(self, event)
+        else:
+            element = self.FindElement(event)
+            if element:
+                if self.SelectedElement and self.SelectedElement != element:
+                    self.SelectedElement.SetSelected(False)
+                self.SelectedElement = element
+                if self.IsWire(self.SelectedElement):
+                    self.SelectedElement.SetSelectedSegment(0)
+                else:
+                    self.SelectedElement.SetSelected(True)
+                    self.SelectedElement.OnRightUp(event, self.GetLogicalDC(), self.Scaling)
+                    self.SelectedElement.Refresh()
+                wx.CallAfter(self.SetCurrentCursor, 0)
+        event.Skip()
+    
+    def OnViewerLeftDClick(self, event):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.OnViewerLeftDClick(self, event)
+        elif self.Mode == MODE_SELECTION and self.SelectedElement:
+            self.SelectedElement.OnLeftDClick(event, self.GetLogicalDC(), self.Scaling)
+            self.Refresh(False)
+        event.Skip()
+    
+    def OnViewerMotion(self, event):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.OnViewerMotion(self, event)
+        else:
+            if self.rubberBand.IsShown():
+                self.rubberBand.OnMotion(event, self.GetLogicalDC(), self.Scaling)
+            elif self.Mode == MODE_SELECTION and self.SelectedElement:
+                if not self.IsWire(self.SelectedElement) and not isinstance(self.SelectedElement, Graphic_Group):
+                    self.SelectedElement.OnMotion(event, self.GetLogicalDC(), self.Scaling)
+                    self.SelectedElement.Refresh()
+            elif self.Mode == MODE_WIRE and self.SelectedElement:
+                self.SelectedElement.ResetPoints()
+                self.SelectedElement.OnMotion(event, self.GetLogicalDC(), self.Scaling)
+                self.SelectedElement.GeneratePoints()
+                self.SelectedElement.Refresh()
+            self.UpdateScrollPos(event)
+        event.Skip()
+
+#-------------------------------------------------------------------------------
+#                          Keyboard event functions
+#-------------------------------------------------------------------------------
+
+    def OnChar(self, event):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.OnChar(self, event)
+        else:
+            xpos, ypos = self.GetScrollPos(wx.HORIZONTAL), self.GetScrollPos(wx.VERTICAL)
+            xmax = self.GetScrollRange(wx.HORIZONTAL) - self.GetScrollThumb(wx.HORIZONTAL)
+            ymax = self.GetScrollRange(wx.VERTICAL) - self.GetScrollThumb(wx.VERTICAL)
+            keycode = event.GetKeyCode()
+            if self.Scaling:
+                scaling = self.Scaling
+            else:
+                scaling = (8, 8)
+            if keycode == wx.WXK_DELETE and self.SelectedElement:
+                self.SelectedElement.Delete()
+                self.SelectedElement = None
+                self.RefreshBuffer()
+                self.RefreshScrollBars()
+                self.Refresh(False)
+            elif keycode == wx.WXK_LEFT:
+                if event.ControlDown() and event.ShiftDown():
+                    self.Scroll(0, ypos)
+                elif event.ControlDown():
+                    event.Skip()
+                elif self.SelectedElement:
+                    self.SelectedElement.Move(-scaling[0], 0)
+                    self.SelectedElement.RefreshModel()
+                    self.RefreshBuffer()
+                    self.RefreshScrollBars()
+                    self.RefreshRect(self.GetScrolledRect(self.SelectedElement.GetRedrawRect(-scaling[0], 0)), False)
+            elif keycode == wx.WXK_RIGHT:
+                if event.ControlDown() and event.ShiftDown():
+                    self.Scroll(xmax, ypos)
+                elif event.ControlDown():
+                    event.Skip()
+                elif self.SelectedElement:
+                    self.SelectedElement.Move(scaling[0], 0)
+                    self.SelectedElement.RefreshModel()
+                    self.RefreshBuffer()
+                    self.RefreshScrollBars()
+                    self.RefreshRect(self.GetScrolledRect(self.SelectedElement.GetRedrawRect(scaling[0], 0)), False)
+            elif keycode == wx.WXK_UP:
+                if event.ControlDown() and event.ShiftDown():
+                    self.Scroll(xpos, 0)
+                elif event.ControlDown():
+                    event.Skip()
+                elif self.SelectedElement:
+                    self.SelectedElement.Move(0, -scaling[1])
+                    self.SelectedElement.RefreshModel()
+                    self.RefreshBuffer()
+                    self.RefreshScrollBars()
+                    self.RefreshRect(self.GetScrolledRect(self.SelectedElement.GetRedrawRect(0, -scaling[1])), False)
+            elif keycode == wx.WXK_DOWN:
+                if event.ControlDown() and event.ShiftDown():
+                    self.Scroll(xpos, ymax)
+                elif event.ControlDown():
+                    event.Skip()
+                elif self.SelectedElement:
+                    self.SelectedElement.Move(0, scaling[1])
+                    self.SelectedElement.RefreshModel()
+                    self.RefreshBuffer()
+                    self.RefreshScrollBars()
+                    self.RefreshRect(self.GetScrolledRect(self.SelectedElement.GetRedrawRect(0, scaling[1])), False)
+            else:
+                event.Skip()
+        
+#-------------------------------------------------------------------------------
+#                          Adding element functions
+#-------------------------------------------------------------------------------
+
+    def AddInitialStep(self, pos):
+        dialog = SFCStepNameDialog(self.ParentWindow, _("Please enter step name"), _("Add a new initial step"), "", wx.OK|wx.CANCEL)
+        dialog.SetPouNames(self.Controler.GetProjectPouNames(self.Debug))
+        dialog.SetVariables(self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug))
+        dialog.SetStepNames([block.GetName() for block in self.Blocks if isinstance(block, SFC_Step)])
+        if dialog.ShowModal() == wx.ID_OK:
+            id = self.GetNewId()
+            name = dialog.GetValue()
+            step = SFC_Step(self, name, True, id)
+            min_width, min_height = step.GetMinSize()
+            step.SetPosition(pos.x, pos.y)
+            width, height = step.GetSize()
+            step.SetSize(max(min_width, width), max(min_height, height))
+            self.AddBlock(step)
+            self.Controler.AddEditedElementStep(self.TagName, id)
+            self.RefreshStepModel(step)
+            self.RefreshBuffer()
+            self.RefreshScrollBars()
+            self.Refresh(False)
+        dialog.Destroy()
+
+    def AddStep(self):
+        if self.SelectedElement in self.Wires or isinstance(self.SelectedElement, SFC_Step):
+            dialog = SFCStepNameDialog(self.ParentWindow, _("Add a new step"), _("Please enter step name"), "", wx.OK|wx.CANCEL)
+            dialog.SetPouNames(self.Controler.GetProjectPouNames(self.Debug))
+            dialog.SetVariables(self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug))
+            dialog.SetStepNames([block.GetName() for block in self.Blocks if isinstance(block, SFC_Step)])
+            if dialog.ShowModal() == wx.ID_OK:
+                name = dialog.GetValue()
+                if self.IsWire(self.SelectedElement):
+                    self.SelectedElement.SetSelectedSegment(None)
+                    previous = self.SelectedElement.EndConnected
+                    next = self.SelectedElement.StartConnected
+                    self.SelectedElement.Clean()
+                    self.RemoveWire(self.SelectedElement)
+                else:
+                    connectors = self.SelectedElement.GetConnectors()
+                    if connectors["output"]:
+                        previous = connectors["output"]
+                        wires = previous.GetWires()
+                        if len(wires) != 1:
+                            return
+                        wire = wires[0][0]
+                        next = wire.StartConnected
+                        wire.Clean()
+                        self.RemoveWire(wire)
+                    else:
+                        self.SelectedElement.AddOutput()
+                        connectors = self.SelectedElement.GetConnectors()
+                        self.RefreshStepModel(self.SelectedElement)
+                        previous = connectors["output"]
+                        next = None
+                previous_block = previous.GetParentBlock()
+                if isinstance(previous_block, SFC_Step) or isinstance(previous_block, SFC_Divergence) and previous_block.GetType() in [SELECTION_DIVERGENCE, SELECTION_CONVERGENCE]:
+                    transition = self.CreateTransition(previous)
+                    transition_connectors = transition.GetConnectors()
+                    step = self.CreateStep(name, transition_connectors["output"], next)
+                else:
+                    step = self.CreateStep(name, previous)
+                    step.AddOutput()
+                    step.RefreshModel()
+                    step_connectors = step.GetConnectors()
+                    transition = self.CreateTransition(step_connectors["output"], next)
+                if self.IsWire(self.SelectedElement):
+                    self.SelectedElement = wire
+                    self.SelectedElement.SetSelectedSegment(0)
+                else:
+                    self.SelectedElement.SetSelected(False)
+                    self.SelectedElement = step
+                    self.SelectedElement.SetSelected(True)
+                self.RefreshBuffer()
+                self.RefreshScrollBars()
+                self.Refresh(False)
+            dialog.Destroy()
+    
+    def AddStepAction(self):
+        if isinstance(self.SelectedElement, SFC_Step):
+            connectors = self.SelectedElement.GetConnectors()
+            if not connectors["action"]:
+                dialog = ActionBlockDialog(self.ParentWindow)
+                dialog.SetQualifierList(self.Controler.GetQualifierTypes())
+                dialog.SetActionList(self.Controler.GetEditedElementActions(self.TagName, self.Debug))
+                dialog.SetVariableList(self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug))
+                if dialog.ShowModal() == wx.ID_OK:
+                    actions = dialog.GetValues()
+                    self.SelectedElement.AddAction()
+                    self.RefreshStepModel(self.SelectedElement)
+                    connectors = self.SelectedElement.GetConnectors()
+                    pos = connectors["action"].GetPosition(False)
+                    id = self.GetNewId()
+                    actionblock = SFC_ActionBlock(self, [], id)
+                    actionblock.SetPosition(pos.x + SFC_WIRE_MIN_SIZE, pos.y - SFC_STEP_DEFAULT_SIZE[1] / 2)
+                    actionblock_connector = actionblock.GetConnector()
+                    wire = self.ConnectConnectors(actionblock_connector, connectors["action"])
+                    wire.SetPoints([wx.Point(pos.x + SFC_WIRE_MIN_SIZE, pos.y), wx.Point(pos.x, pos.y)])
+                    actionblock.SetActions(actions)
+                    self.AddBlock(actionblock)
+                    self.Controler.AddEditedElementActionBlock(self.TagName, id)
+                    self.RefreshActionBlockModel(actionblock)
+                    self.RefreshBuffer()
+                    self.RefreshScrollBars()
+                    self.Refresh(False)
+                dialog.Destroy()
+    
+    def AddDivergence(self):
+        if self.SelectedElement in self.Wires or isinstance(self.SelectedElement, Graphic_Group) or isinstance(self.SelectedElement, SFC_Step):        
+            dialog = SFCDivergenceDialog(self.ParentWindow)
+            dialog.SetPreviewFont(self.GetFont())
+            if dialog.ShowModal() == wx.ID_OK:
+                value = dialog.GetValues()
+                if value["type"] == SELECTION_DIVERGENCE:
+                    if self.SelectedElement in self.Wires and isinstance(self.SelectedElement.EndConnected.GetParentBlock(), SFC_Step):
+                        self.SelectedElement.SetSelectedSegment(None)
+                        previous = self.SelectedElement.EndConnected
+                        next = self.SelectedElement.StartConnected
+                        self.SelectedElement.Clean()
+                        self.RemoveWire(self.SelectedElement)
+                        self.SelectedElement = None
+                    elif isinstance(self.SelectedElement, SFC_Step):
+                        connectors = self.SelectedElement.GetConnectors()
+                        if connectors["output"]:
+                            previous = connectors["output"]
+                            wires = previous.GetWires()
+                            if len(wires) != 1:
+                                return
+                            wire = wires[0][0]
+                            next = wire.StartConnected
+                            wire.Clean()
+                            self.RemoveWire(wire)
+                        else:
+                            self.SelectedElement.AddOutput()
+                            connectors = self.SelectedElement.GetConnectors()
+                            self.RefreshStepModel(self.SelectedElement)
+                            previous = connectors["output"]
+                            next = None
+                    else:
+                        return
+                    id = self.GetNewId()
+                    divergence = SFC_Divergence(self, SELECTION_DIVERGENCE, value["number"], id)
+                    pos = previous.GetPosition(False)
+                    previous_block = previous.GetParentBlock()
+                    wire_size = GetWireSize(previous_block)
+                    divergence.SetPosition(pos.x, pos.y + wire_size)
+                    divergence_connectors = divergence.GetConnectors()
+                    wire = self.ConnectConnectors(divergence_connectors["inputs"][0], previous)
+                    previous_block.RefreshOutputPosition()
+                    wire.SetPoints([wx.Point(pos.x, pos.y + wire_size), wx.Point(pos.x, pos.y)])
+                    self.AddBlock(divergence)
+                    self.Controler.AddEditedElementDivergence(self.TagName, id, value["type"])
+                    self.RefreshDivergenceModel(divergence)
+                    for index, connector in enumerate(divergence_connectors["outputs"]):
+                        if next:
+                            wire = self.ConnectConnectors(next, connector)
+                            pos = connector.GetPosition(False)
+                            next_pos = next.GetPosition(False)
+                            next_block = next.GetParentBlock()
+                            divergence.RefreshOutputPosition((0, pos.y + SFC_WIRE_MIN_SIZE - next_pos.y))
+                            divergence.RefreshConnectedPosition(connector)
+                            wire.SetPoints([wx.Point(pos.x, pos.y + SFC_WIRE_MIN_SIZE), wx.Point(pos.x, pos.y)])
+                            next_block.RefreshModel()
+                            next = None
+                        else:
+                            transition = self.CreateTransition(connector)
+                            transition_connectors = transition.GetConnectors()
+                            step = self.CreateStep("Step", transition_connectors["output"])
+                elif value["type"] == SIMULTANEOUS_DIVERGENCE:
+                    if self.SelectedElement in self.Wires and isinstance(self.SelectedElement.EndConnected.GetParentBlock(), SFC_Transition):
+                        self.SelectedElement.SetSelectedSegment(None)
+                        previous = self.SelectedElement.EndConnected
+                        next = self.SelectedElement.StartConnected
+                        self.SelectedElement.Clean()
+                        self.RemoveWire(self.SelectedElement)
+                        self.SelectedElement = None
+                    elif isinstance(self.SelectedElement, SFC_Step):
+                        connectors = self.SelectedElement.GetConnectors()
+                        if connectors["output"]:
+                            previous = connectors["output"]
+                            wires = previous.GetWires()
+                            if len(wires) != 1:
+                                return
+                            wire = wires[0][0]
+                            next = wire.StartConnected
+                            wire.Clean()
+                            self.RemoveWire(wire)
+                        else:
+                            self.SelectedElement.AddOutput()
+                            connectors = self.SelectedElement.GetConnectors()
+                            self.RefreshStepModel(self.SelectedElement)
+                            previous = connectors["output"]
+                            next = None
+                        transition = self.CreateTransition(previous)
+                        transition_connectors = transition.GetConnectors()
+                        previous = transition_connectors["output"]
+                    else:
+                        return
+                    id = self.GetNewId()
+                    divergence = SFC_Divergence(self, SIMULTANEOUS_DIVERGENCE, value["number"], id)
+                    pos = previous.GetPosition(False)
+                    previous_block = previous.GetParentBlock()
+                    wire_size = GetWireSize(previous_block)
+                    divergence.SetPosition(pos.x, pos.y + wire_size)
+                    divergence_connectors = divergence.GetConnectors()
+                    wire = self.ConnectConnectors(divergence_connectors["inputs"][0], previous)
+                    previous_block.RefreshOutputPosition()
+                    wire.SetPoints([wx.Point(pos.x, pos.y + wire_size), wx.Point(pos.x, pos.y)])
+                    self.AddBlock(divergence)
+                    self.Controler.AddEditedElementDivergence(self.TagName, id, value["type"])
+                    self.RefreshDivergenceModel(divergence)
+                    for index, connector in enumerate(divergence_connectors["outputs"]):
+                        if next:
+                            wire = self.ConnectConnectors(next, connector)
+                            pos = connector.GetPosition(False)
+                            next_pos = next.GetPosition(False)
+                            next_block = next.GetParentBlock()
+                            divergence.RefreshOutputPosition((0, pos.y + SFC_WIRE_MIN_SIZE - next_pos.y))
+                            divergence.RefreshConnectedPosition(connector)
+                            wire.SetPoints([wx.Point(pos.x, pos.y + SFC_WIRE_MIN_SIZE), wx.Point(pos.x, pos.y)])
+                            next_block.RefreshModel()
+                            next = None
+                        else:
+                            step = self.CreateStep("Step", connector)
+                elif isinstance(self.SelectedElement, Graphic_Group) and len(self.SelectedElement.GetElements()) > 1:
+                    next = None
+                    for element in self.SelectedElement.GetElements():
+                        connectors = element.GetConnectors()
+                        if not isinstance(element, SFC_Step) or connectors["output"] and next:
+                            return
+                        elif connectors["output"] and not next:
+                            wires = connectors["output"].GetWires()
+                            if len(wires) != 1:
+                                return
+                            if value["type"] == SELECTION_CONVERGENCE:
+                                transition = wires[0][0].StartConnected.GetParentBlock()
+                                transition_connectors = transition.GetConnectors()
+                                wires = transition_connectors["output"].GetWires()
+                                if len(wires) != 1:
+                                    return
+                            wire = wires[0][0]
+                            next = wire.StartConnected
+                            wire.Clean()
+                            self.RemoveWire(wire)
+                    inputs = []
+                    for input in self.SelectedElement.GetElements():
+                        input_connectors = input.GetConnectors()
+                        if not input_connectors["output"]:
+                            input.AddOutput()
+                            input.RefreshModel()
+                            input_connectors = input.GetConnectors()
+                            if value["type"] == SELECTION_CONVERGENCE:
+                                transition = self.CreateTransition(input_connectors["output"])
+                                transition_connectors = transition.GetConnectors()
+                                inputs.append(transition_connectors["output"])
+                            else:
+                                inputs.append(input_connectors["output"])
+                        elif value["type"] == SELECTION_CONVERGENCE:
+                            wires = input_connectors["output"].GetWires()
+                            transition = wires[0][0].StartConnected.GetParentBlock()
+                            transition_connectors = transition.GetConnectors()
+                            inputs.append(transition_connectors["output"])
+                        else:
+                            inputs.append(input_connectors["output"])
+                    id = self.GetNewId()
+                    divergence = SFC_Divergence(self, value["type"], len(inputs), id)
+                    pos = inputs[0].GetPosition(False)
+                    divergence.SetPosition(pos.x, pos.y + SFC_WIRE_MIN_SIZE)
+                    divergence_connectors = divergence.GetConnectors()
+                    for i, input in enumerate(inputs):
+                        pos = input.GetPosition(False)
+                        wire = self.ConnectConnectors(divergence_connectors["inputs"][i], input)
+                        wire_size = GetWireSize(input)
+                        wire.SetPoints([wx.Point(pos.x, pos.y + wire_size), wx.Point(pos.x, pos.y)])
+                        input_block = input.GetParentBlock()
+                        input_block.RefreshOutputPosition()
+                    divergence.RefreshPosition()
+                    pos = divergence_connectors["outputs"][0].GetRelPosition()
+                    divergence.MoveConnector(divergence_connectors["outputs"][0], - pos.x)
+                    self.AddBlock(divergence)
+                    self.Controler.AddEditedElementDivergence(self.TagName, id, value["type"])
+                    self.RefreshDivergenceModel(divergence)
+                    if next:
+                        wire = self.ConnectConnectors(next, divergence_connectors["outputs"][0])
+                        pos = divergence_connectors["outputs"][0].GetPosition(False)
+                        next_pos = next.GetPosition(False)
+                        next_block = next.GetParentBlock()
+                        divergence.RefreshOutputPosition((0, pos.y + SFC_WIRE_MIN_SIZE - next_pos.y))
+                        divergence.RefreshConnectedPosition(divergence_connectors["outputs"][0])
+                        wire.SetPoints([wx.Point(pos.x, pos.y + SFC_WIRE_MIN_SIZE), wx.Point(pos.x, pos.y)])
+                        next_block.RefreshModel()
+                    else:
+                        if value["type"] == SELECTION_CONVERGENCE:
+                            previous = divergence_connectors["outputs"][0]
+                        else:
+                            transition = self.CreateTransition(divergence_connectors["outputs"][0])
+                            transition_connectors = transition.GetConnectors()
+                            previous = transition_connectors["output"]
+                        self.CreateStep("Step", previous)
+                self.RefreshBuffer()
+                self.RefreshScrollBars()
+                self.Refresh(False)
+            dialog.Destroy()
+    
+    def AddDivergenceBranch(self, divergence):
+        if isinstance(divergence, SFC_Divergence):
+            if self.GetDrawingMode() == FREEDRAWING_MODE:
+                divergence.AddBranch()
+                self.RefreshDivergenceModel(divergence)
+            else:
+                type = divergence.GetType()
+                if type in [SELECTION_DIVERGENCE, SIMULTANEOUS_DIVERGENCE]:
+                    divergence.AddBranch()
+                    divergence_connectors = divergence.GetConnectors()
+                    if type == SELECTION_DIVERGENCE:
+                        transition = self.CreateTransition(divergence_connectors["outputs"][-1])
+                        transition_connectors = transition.GetConnectors()
+                        previous = transition_connectors["output"]
+                    else:
+                        previous = divergence_connectors["outputs"][-1]
+                    step = self.CreateStep("Step", previous)
+            self.RefreshBuffer()
+            self.RefreshScrollBars()
+            self.Refresh(False)
+    
+    def RemoveDivergenceBranch(self, divergence):
+        if isinstance(divergence, SFC_Divergence):
+            if self.GetDrawingMode() == FREEDRAWING_MODE:
+                divergence.RemoveHandledBranch()
+                self.RefreshDivergenceModel(divergence)
+                self.RefreshBuffer()
+                self.RefreshScrollBars()
+                self.Refresh(False)
+    
+    def AddJump(self):
+        if isinstance(self.SelectedElement, SFC_Step) and not self.SelectedElement.Output:
+            choices = []
+            for block in self.Blocks:
+                if isinstance(block, SFC_Step):
+                    choices.append(block.GetName())
+            dialog = wx.SingleChoiceDialog(self.ParentWindow, 
+                  _("Add a new jump"), _("Please choose a target"), 
+                  choices, wx.DEFAULT_DIALOG_STYLE|wx.OK|wx.CANCEL)
+            if dialog.ShowModal() == wx.ID_OK:
+                value = dialog.GetStringSelection()
+                self.SelectedElement.AddOutput()
+                self.RefreshStepModel(self.SelectedElement)
+                step_connectors = self.SelectedElement.GetConnectors()
+                transition = self.CreateTransition(step_connectors["output"])
+                transition_connectors = transition.GetConnectors()
+                id = self.GetNewId()
+                jump = SFC_Jump(self, value, id)
+                pos = transition_connectors["output"].GetPosition(False)
+                jump.SetPosition(pos.x, pos.y + SFC_WIRE_MIN_SIZE)
+                self.AddBlock(jump)
+                self.Controler.AddEditedElementJump(self.TagName, id)
+                jump_connector = jump.GetConnector()
+                wire = self.ConnectConnectors(jump_connector, transition_connectors["output"])
+                transition.RefreshOutputPosition()
+                wire.SetPoints([wx.Point(pos.x, pos.y + SFC_WIRE_MIN_SIZE), wx.Point(pos.x, pos.y)])
+                self.RefreshJumpModel(jump)
+                self.RefreshBuffer()
+                self.RefreshScrollBars()
+                self.Refresh(False)
+            dialog.Destroy()
+
+    def EditStepContent(self, step):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.EditStepContent(self, step)
+        else:
+            dialog = SFCStepNameDialog(self.ParentWindow, _("Edit step name"), _("Please enter step name"), step.GetName(), wx.OK|wx.CANCEL)
+            dialog.SetPouNames(self.Controler.GetProjectPouNames(self.Debug))
+            dialog.SetVariables(self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug))
+            dialog.SetStepNames([block.GetName() for block in self.Blocks if isinstance(block, SFC_Step) and block.GetName() != step.GetName()])
+            if dialog.ShowModal() == wx.ID_OK:
+                value = dialog.GetValue()
+                step.SetName(value)
+                min_size = step.GetMinSize()
+                size = step.GetSize()
+                step.UpdateSize(max(min_size[0], size[0]), max(min_size[1], size[1]))
+                step.RefreshModel()
+                self.RefreshBuffer()
+                self.RefreshScrollBars()
+                self.Refresh(False)
+            dialog.Destroy()
+
+#-------------------------------------------------------------------------------
+#                          Delete element functions
+#-------------------------------------------------------------------------------
+
+    def DeleteStep(self, step):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.DeleteStep(self, step)
+        else:
+            step_connectors = step.GetConnectors()
+            if not step.GetInitial() or not step_connectors["output"]:
+                previous = step.GetPreviousConnector()
+                if previous:
+                    previous_block = previous.GetParentBlock()
+                else:
+                    previous_block = None
+                next = step.GetNextConnector()
+                if next:
+                    next_block = next.GetParentBlock()
+                else:
+                    next_block = None
+                if isinstance(next_block, SFC_Transition):
+                    self.RemoveTransition(next_block)
+                    next = step.GetNextConnector()
+                    if next:
+                        next_block = next.GetParentBlock()
+                    else:
+                        next_block = None
+                elif isinstance(previous_block, SFC_Transition):
+                    self.RemoveTransition(previous_block)
+                    previous = step.GetPreviousConnector()
+                    if previous:
+                        previous_block = previous.GetParentBlock()
+                    else:
+                        previous_block = None
+                wire = self.RemoveStep(step)
+                self.SelectedElement = None
+                if next_block:
+                    if isinstance(next_block, SFC_Divergence) and next_block.GetType() == SIMULTANEOUS_CONVERGENCE and isinstance(previous_block, SFC_Divergence) and previous_block.GetType() == SIMULTANEOUS_DIVERGENCE:
+                        wire.Clean()
+                        self.RemoveWire(wire)
+                        next_block.RemoveBranch(next)
+                        if next_block.GetBranchNumber() < 2:
+                            self.DeleteDivergence(next_block)
+                        else:
+                            next_block.RefreshModel()
+                        previous_block.RemoveBranch(previous)
+                        if previous_block.GetBranchNumber() < 2:
+                            self.DeleteDivergence(previous_block)
+                        else:
+                            previous_block.RefreshModel()
+                    else:
+                        pos = previous.GetPosition(False)
+                        next_pos = next.GetPosition(False)
+                        wire_size = GetWireSize(previous_block)
+                        previous_block.RefreshOutputPosition((0, pos.y + wire_size - next_pos.y))
+                        wire.SetPoints([wx.Point(pos.x, pos.y + wire_size), wx.Point(pos.x, pos.y)])
+                        if isinstance(next_block, SFC_Divergence):
+                            next_block.RefreshPosition()
+                        previous_block.RefreshOutputModel(True)
+                else:
+                    if isinstance(previous_block, SFC_Step):
+                        previous_block.RemoveOutput()
+                        self.RefreshStepModel(previous_block)
+                    elif isinstance(previous_block, SFC_Divergence):
+                        if previous_block.GetType() in [SELECTION_CONVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+                            self.DeleteDivergence(previous_block)
+                        else:
+                            previous_block.RemoveBranch(previous)
+                            if previous_block.GetBranchNumber() < 2:
+                                self.DeleteDivergence(previous_block)
+                            else:
+                                self.RefreshDivergenceModel(previous_block)
+        
+    def DeleteTransition(self, transition):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.DeleteTransition(self, transition)
+        else:
+            previous = transition.GetPreviousConnector()
+            previous_block = previous.GetParentBlock()
+            next = transition.GetNextConnector()
+            next_block = next.GetParentBlock()
+            if isinstance(previous_block, SFC_Divergence) and previous_block.GetType() == SELECTION_DIVERGENCE and isinstance(next_block, SFC_Divergence) and next_block.GetType() == SELECTION_CONVERGENCE:
+                wires = previous.GetWires()
+                if len(wires) != 1:
+                    return
+                wire = wires[0][0]
+                wire.Clean()
+                self.RemoveWire(wire)
+                wires = next.GetWires()
+                if len(wires) != 1:
+                    return
+                wire = wires[0][0]
+                wire.Clean()
+                self.RemoveWire(wire)
+                transition.Clean()
+                self.RemoveBlock(transition)
+                self.Controler.RemoveEditedElementInstance(self.TagName, transition.GetId())
+                previous_block.RemoveBranch(previous)
+                if previous_block.GetBranchNumber() < 2:
+                    self.DeleteDivergence(previous_block)
+                else:
+                    self.RefreshDivergenceModel(previous_block)
+                next_block.RemoveBranch(next)
+                if next_block.GetBranchNumber() < 2:
+                    self.DeleteDivergence(next_block)
+                else:
+                    self.RefreshDivergenceModel(next_block)
+            
+    def DeleteDivergence(self, divergence):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.DeleteDivergence(self, divergence)
+        else:
+            connectors = divergence.GetConnectors()
+            type = divergence.GetType()
+            if type in [SELECTION_CONVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+                wires = connectors["outputs"][0].GetWires()
+                if len(wires) > 1:
+                    return
+                elif len(wires) == 1:
+                    next = wires[0][0].StartConnected
+                    next_block = next.GetParentBlock()
+                    wire = wires[0][0]
+                    wire.Clean()
+                    self.RemoveWire(wire)
+                else:
+                    next = None
+                    next_block = None
+                for index, connector in enumerate(connectors["inputs"]):
+                    if next and index == 0:
+                        wires = connector.GetWires()
+                        wire = wires[0][0]
+                        previous = wires[0][0].EndConnected
+                        wire.Clean()
+                        self.RemoveWire(wire)
+                    else:
+                        if type == SELECTION_CONVERGENCE:
+                            wires = connector.GetWires()
+                            previous_block = wires[0][0].EndConnected.GetParentBlock()
+                            self.RemoveTransition(previous_block)
+                        wires = connector.GetWires()
+                        wire = wires[0][0]
+                        previous_connector = wire.EndConnected
+                        previous_block = previous_connector.GetParentBlock()
+                        wire.Clean()
+                        self.RemoveWire(wire)
+                        if isinstance(previous_block, SFC_Step):
+                            previous_block.RemoveOutput()
+                            self.RefreshStepModel(previous_block)
+                        elif isinstance(previous_block, SFC_Divergence):
+                            if previous_block.GetType() in [SELECTION_DIVERGENCE, SIMULTANEOUS_DIVERGENCE]:
+                                previous_block.RemoveBranch(previous_connector)
+                                if previous_block.GetBranchNumber() < 2:
+                                    self.DeleteDivergence(previous_block)
+                                else:
+                                    self.RefreshDivergenceModel(previous_block)
+                            else:
+                                self.DeleteDivergence(previous_block)
+                divergence.Clean()
+                self.RemoveBlock(divergence)
+                self.Controler.RemoveEditedElementInstance(self.TagName, divergence.GetId())
+                if next:
+                    wire = self.ConnectConnectors(next, previous)
+                    previous_block = previous.GetParentBlock()
+                    previous_pos = previous.GetPosition(False)
+                    next_pos = next.GetPosition(False)
+                    wire_size = GetWireSize(previous_block)
+                    previous_block.RefreshOutputPosition((0, previous_pos.y + wire_size - next_pos.y))
+                    wire.SetPoints([wx.Point(previous_pos.x, previous_pos.y + wire_size), 
+                        wx.Point(previous_pos.x, previous_pos.y)])
+                    if isinstance(next_block, SFC_Divergence):
+                        next_block.RefreshPosition()
+                    previous_block.RefreshOutputModel(True)
+            elif divergence.GetBranchNumber() == 1:
+                wires = connectors["inputs"][0].GetWires()
+                if len(wires) != 1:
+                    return
+                wire = wires[0][0]
+                previous = wire.EndConnected
+                previous_block = previous.GetParentBlock()
+                wire.Clean()
+                self.RemoveWire(wire)
+                wires = connectors["outputs"][0].GetWires()
+                if len(wires) != 1:
+                    return
+                wire = wires[0][0]
+                next = wire.StartConnected
+                next_block = next.GetParentBlock()
+                wire.Clean()
+                self.RemoveWire(wire)
+                divergence.Clean()
+                self.RemoveBlock(divergence)
+                self.Controler.RemoveEditedElementInstance(self.TagName, divergence.GetId())
+                wire = self.ConnectConnectors(next, previous)
+                previous_pos = previous.GetPosition(False)
+                next_pos = next.GetPosition(False)
+                wire_size = GetWireSize(previous_block)
+                previous_block.RefreshOutputPosition((previous_pos.x - next_pos.x, previous_pos.y + wire_size - next_pos.y))
+                wire.SetPoints([wx.Point(previous_pos.x, previous_pos.y + wire_size), 
+                    wx.Point(previous_pos.x, previous_pos.y)])
+                if isinstance(next_block, SFC_Divergence):
+                    next_block.RefreshPosition()
+                previous_block.RefreshOutputModel(True)
+            
+    def DeleteJump(self, jump):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.DeleteJump(self, jump)
+        else:
+            previous = jump.GetPreviousConnector()
+            previous_block = previous.GetParentBlock()
+            if isinstance(previous_block, SFC_Transition):
+                self.RemoveTransition(previous_block)
+                previous = jump.GetPreviousConnector()
+                if previous:
+                    previous_block = previous.GetParentBlock()
+                else:
+                    previous_block = None
+            wires = previous.GetWires()
+            if len(wires) != 1:
+                return
+            wire = wires[0][0]
+            wire.Clean()
+            self.RemoveWire(wire)
+            jump.Clean()
+            self.RemoveBlock(jump)
+            self.Controler.RemoveEditedElementInstance(self.TagName, jump.GetId())
+            if isinstance(previous_block, SFC_Step):
+                previous_block.RemoveOutput()
+                self.RefreshStepModel(previous_block)
+            elif isinstance(previous_block, SFC_Divergence):
+                if previous_block.GetType() in [SELECTION_CONVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+                    self.DeleteDivergence(previous_block)
+                else:
+                    previous_block.RemoveBranch(previous)
+                    if previous_block.GetBranchNumber() < 2:
+                        self.DeleteDivergence(previous_block)
+                    else:
+                        previous_block.RefreshModel()
+            
+    def DeleteActionBlock(self, actionblock):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.DeleteActionBlock(self, actionblock)
+        else:
+            connector = actionblock.GetConnector()
+            wires = connector.GetWires()
+            if len(wires) != 1:
+                return
+            wire = wires[0][0]
+            step = wire.EndConnected.GetParentBlock()
+            wire.Clean()
+            self.RemoveWire(wire)
+            actionblock.Clean()
+            self.RemoveBlock(actionblock)
+            self.Controler.RemoveEditedElementInstance(self.TagName, actionblock.GetId())
+            step.RemoveAction()
+            self.RefreshStepModel(step)
+            step.RefreshOutputPosition()
+            step.RefreshOutputModel(True)
+            
+    def DeleteWire(self, wire):
+        if self.GetDrawingMode() == FREEDRAWING_MODE:
+            Viewer.DeleteWire(self, wire)
+
+#-------------------------------------------------------------------------------
+#                          Model update functions
+#-------------------------------------------------------------------------------
+
+    def RefreshBlockModel(self, block):
+        blockid = block.GetId()
+        infos = {}
+        infos["type"] = block.GetType()
+        infos["name"] = block.GetName()
+        infos["x"], infos["y"] = block.GetPosition()
+        infos["width"], infos["height"] = block.GetSize()
+        infos["connectors"] = block.GetConnectors()
+        self.Controler.SetEditedElementBlockInfos(self.TagName, blockid, infos)
+