graphics/SFC_Objects.py
changeset 0 b622defdfd98
child 1 e9d01d824086
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphics/SFC_Objects.py	Wed Jan 31 16:31:39 2007 +0100
@@ -0,0 +1,1295 @@
+#!/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 Lesser 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 Lesser 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 GraphicCommons import *
+from plcopen.structures import *
+
+def GetWireSize(block):
+    if isinstance(block, SFC_Step):
+        return SFC_WIRE_MIN_SIZE + block.GetActionExtraLineNumber() * SFC_ACTION_MIN_SIZE[1]
+    else:
+        return SFC_WIRE_MIN_SIZE
+
+#-------------------------------------------------------------------------------
+#                         Sequencial Function Chart Step
+#-------------------------------------------------------------------------------
+
+"""
+Class that implements the graphic representation of a step
+"""
+
+class SFC_Step(Graphic_Element):
+    
+    # Create a new step
+    def __init__(self, parent, name, initial = False, id = None):
+        Graphic_Element.__init__(self, parent)
+        self.Name = name
+        self.Initial = initial
+        self.Id = id
+        self.Size = wxSize(SFC_STEP_DEFAULT_SIZE[0], SFC_STEP_DEFAULT_SIZE[1])
+        # Create an input and output connector
+        if not self.Initial:
+            self.Input = Connector(self, "", "ANY", wxPoint(self.Size[0] / 2, 0), NORTH)
+        else:
+            self.Input = None
+        self.Output = None
+        self.Action = None
+    
+    # Destructor
+    def __del__(self):
+        self.Input = None
+        self.Output = None
+        self.Action = None
+    
+    # Delete this step by calling the appropriate method
+    def Delete(self):
+        self.Parent.DeleteStep(self)
+    
+    # Unconnect input and output
+    def Clean(self):
+        if self.Input:
+            self.Input.UnConnect()
+        if self.Output:
+            self.Output.UnConnect()
+        if self.Action:
+            self.Action.UnConnect()
+    
+    # Add output connector to step
+    def AddOutput(self):
+        if not self.Output:
+            self.Output = Connector(self, "", "ANY", wxPoint(self.Size[0] / 2, self.Size[1]), SOUTH)
+            self.RefreshBoundingBox()
+    
+    # Remove output connector from step
+    def RemoveOutput(self):
+        if self.Output:
+            self.Output.UnConnect()
+            self.Output = None
+            self.RefreshBoundingBox()
+    
+    # Add action connector to step
+    def AddAction(self):
+        if not self.Action:
+            self.Action = Connector(self, "", "ANY", wxPoint(self.Size[0], self.Size[1] / 2), EAST)
+            self.RefreshBoundingBox()
+    
+    # Remove action connector from step
+    def RemoveAction(self):
+        if self.Action:
+            self.Action.UnConnect()
+            self.Action = None
+            self.RefreshBoundingBox()
+    
+    # Refresh the step bounding box
+    def RefreshBoundingBox(self):
+        dc = wxClientDC(self.Parent)
+        # Calculate the bounding box size
+        if self.Action:
+            bbx_width = self.Size[0] + CONNECTOR_SIZE
+        else:
+            bbx_width = self.Size[0]
+        if self.Initial:
+            bbx_y = self.Pos.y
+            bbx_height = self.Size[1]
+            if self.Output:
+                bbx_height += CONNECTOR_SIZE
+        else:
+            bbx_y = self.Pos.y - CONNECTOR_SIZE
+            bbx_height = self.Size[1] + CONNECTOR_SIZE
+            if self.Output:
+                bbx_height += CONNECTOR_SIZE
+        #self.BoundingBox = wxRect(self.Pos.x, bbx_y, bbx_width + 1, bbx_height + 1)
+        self.BoundingBox = wxRect(self.Pos.x, self.Pos.y, self.Size[0] + 1, self.Size[1] + 1)
+        
+    # Refresh the positions of the step connectors
+    def RefreshConnectors(self):
+        # Update input position if it exists
+        if self.Input:
+            self.Input.SetPosition(wxPoint(self.Size[0] / 2, 0))
+        # Update output position
+        if self.Output:
+            self.Output.SetPosition(wxPoint(self.Size[0] / 2, self.Size[1]))
+        # Update action position if it exists
+        if self.Action:
+            self.Action.SetPosition(wxPoint(self.Size[0], self.Size[1] / 2))
+        self.RefreshConnected()
+    
+    # Refresh the position of wires connected to step
+    def RefreshConnected(self, exclude = []):
+        if self.Input:
+            self.Input.MoveConnected(exclude)
+        if self.Output:
+            self.Output.MoveConnected(exclude)
+        if self.Action:
+            self.Action.MoveConnected(exclude)
+    
+    # Returns the step connector that starts with the point given if it exists 
+    def GetConnector(self, position):
+        # Test input connector if it exists
+        if self.Input:
+            input_pos = self.Input.GetRelPosition()
+            if position.x == self.Pos.x + input_pos.x and position.y == self.Pos.y + input_pos.y:
+                return self.Input
+        # Test output connector if it exists
+        if self.Output:
+            output_pos = self.Output.GetRelPosition()
+            if position.x == self.Pos.x + output_pos.x and position.y == self.Pos.y + output_pos.y:
+                return self.Output
+        # Test action connector if it exists
+        if self.Action:
+            action_pos = self.Action.GetRelPosition()
+            if position.x == self.Pos.x + action_pos.x and position.y == self.Pos.y + action_pos.y:
+                return self.Action
+        return None
+    
+    # Returns input and output step connectors 
+    def GetConnectors(self):
+        return {"input":self.Input,"output":self.Output,"action":self.Action}
+    
+    # Test if point given is on step input or output connector
+    def TestConnector(self, pt, exclude=True):
+        # Test input connector if it exists
+        if self.Input and self.Input.TestPoint(pt, exclude):
+            return self.Input
+        # Test output connector
+        if self.Output and self.Output.TestPoint(pt, exclude):
+            return self.Output
+        return None
+
+    # Changes the step name
+    def SetName(self, name):
+        self.Name = name
+
+    # Returns the step name
+    def GetName(self):
+        return self.Name
+
+    # Returns the step initial property
+    def GetInitial(self):
+        return self.Initial
+    
+    # Returns the connector connected to input
+    def GetPreviousConnector(self):
+        if self.Input:
+            wires = self.Input.GetWires()
+            if len(wires) == 1:
+                return wires[0][0].EndConnected
+        return None
+    
+    # Returns the connector connected to output
+    def GetNextConnector(self):
+        if self.Output:
+            wires = self.Output.GetWires()
+            if len(wires) == 1:
+                return wires[0][0].StartConnected
+        return None
+    
+    # Returns the connector connected to action
+    def GetActionConnector(self):
+        if self.Action:
+            wires = self.Action.GetWires()
+            if len(wires) == 1:
+                return wires[0][0].StartConnected
+        return None
+    
+    # Returns the number of action line
+    def GetActionExtraLineNumber(self):
+        if self.Action:
+            wires = self.Action.GetWires()
+            if len(wires) != 1:
+                return 0
+            action_block = wires[0][0].StartConnected.GetParentBlock()
+            return max(0, action_block.GetLineNumber() - 1)
+        return 0
+    
+    # Returns the step minimum size
+    def GetMinSize(self):
+        dc = wxClientDC(self.Parent)
+        text_width, text_height = dc.GetTextExtent(self.Name)
+        if self.Initial:
+            return text_width + 14, text_height + 14
+        else:
+            return text_width + 10, text_height + 10
+    
+    # Updates the step size
+    def UpdateSize(self, width, height):
+        diffx = self.Size.GetWidth() / 2 - width / 2
+        diffy = height - self.Size.GetHeight()
+        self.Move(diffx, 0)
+        Graphic_Element.SetSize(self, width, height)
+        self.RefreshOutputPosition((0, diffy))
+    
+    # Align input element with this step
+    def RefreshInputPosition(self):
+        if self.Input:
+            current_pos = self.Input.GetPosition(False)
+            input = self.GetPreviousConnector()
+            if input:
+                input_pos = input.GetPosition(False)
+                diffx = current_pos.x - input_pos.x
+                input_block = input.GetParentBlock()
+                if isinstance(input_block, SFC_Divergence):
+                    input_block.MoveConnector(input, diffx)
+                else:
+                    if isinstance(input_block, SFC_Step):
+                        input_block.MoveActionBlock((diffx, 0))
+                    input_block.Move(diffx, 0)
+                    input_block.RefreshInputPosition()
+    
+    # Align output element with this step
+    def RefreshOutputPosition(self, move = None):
+        if self.Output:
+            wires = self.Output.GetWires()
+            if len(wires) != 1:
+                return
+            current_pos = self.Output.GetPosition(False)
+            output = wires[0][0].StartConnected
+            output_pos = output.GetPosition(False)
+            diffx = current_pos.x - output_pos.x
+            output_block = output.GetParentBlock()
+            wire_size = SFC_WIRE_MIN_SIZE + self.GetActionExtraLineNumber() * SFC_ACTION_MIN_SIZE[1]
+            diffy = wire_size - output_pos.y + current_pos.y
+            if diffy != 0:
+                if isinstance(output_block, SFC_Step):
+                    output_block.MoveActionBlock((diffx, diffy))
+                wires[0][0].SetPoints([wxPoint(current_pos.x, current_pos.y + wire_size),
+                    wxPoint(current_pos.x, current_pos.y)])
+                if not isinstance(output_block, SFC_Divergence) or output_block.GetConnectors()["inputs"].index(output) == 0:
+                    output_block.Move(diffx, diffy, self.Parent.Wires)
+                    output_block.RefreshOutputPosition((diffx, diffy))
+                else:
+                    output_block.RefreshPosition()
+            elif move:
+                if isinstance(output_block, SFC_Step):
+                    output_block.MoveActionBlock(move)
+                wires[0][0].Move(move[0], move[1], True)
+                if not isinstance(output_block, SFC_Divergence) or output_block.GetConnectors()["inputs"].index(output) == 0:
+                    output_block.Move(move[0], move[1], self.Parent.Wires)
+                    output_block.RefreshOutputPosition(move)
+                else:
+                    output_block.RefreshPosition()
+            elif isinstance(output_block, SFC_Divergence):
+                output_block.MoveConnector(output, diffx)
+            else:
+                if isinstance(output_block, SFC_Step):
+                    output_block.MoveActionBlock((diffx, 0))
+                output_block.Move(diffx, 0)
+                output_block.RefreshOutputPosition()
+    
+    # Refresh action element with this step
+    def MoveActionBlock(self, move):
+        if self.Action:
+            wires = self.Action.GetWires()
+            if len(wires) != 1:
+                return
+            action_block = wires[0][0].StartConnected.GetParentBlock()
+            action_block.Move(move[0], move[1], self.Parent.Wires)
+            wires[0][0].Move(move[0], move[1], True)
+    
+    # Resize the divergence from position and size given
+    def Resize(self, x, y, width, height):
+        self.UpdateSize(width, height)
+    
+    # Method called when a LeftDClick event have been generated
+    def OnLeftDClick(self, event, scaling):
+        # Edit the step properties
+        self.Parent.EditStepContent(self)
+    
+    # Method called when a RightUp event have been generated
+    def OnRightUp(self, event, scaling):
+        # Popup the menu with special items for a step
+        self.Parent.PopupDefaultMenu()
+    
+    # Refreshes the step state according to move defined and handle selected
+    def ProcessDragging(self, movex, movey):
+        handle_type, handle = self.Handle
+        if handle_type == HANDLE_MOVE:
+            action_block = None
+            if self.Initial:
+                self.MoveActionBlock((movex, movey))
+                self.Move(movex, movey, self.Parent.Wires)
+                self.RefreshOutputPosition((movex, movey))
+            else:
+                self.MoveActionBlock((movex, 0))
+                self.Move(movex, 0)
+                self.RefreshInputPosition()
+                self.RefreshOutputPosition()
+        else:
+            Graphic_Element.ProcessDragging(self, movex, movey)
+    
+    # Refresh input element model
+    def RefreshInputModel(self):
+        if self.Input:
+            input = self.GetPreviousConnector()
+            if input:                
+                input_block = input.GetParentBlock()
+                input_block.RefreshModel(False)
+                if not isinstance(input_block, SFC_Divergence):
+                    input_block.RefreshInputModel()
+    
+    # Refresh output element model
+    def RefreshOutputModel(self, move=False):
+        if self.Output:
+            output = self.GetNextConnector()
+            if output:
+                output_block = output.GetParentBlock()
+                output_block.RefreshModel(False)
+                if not isinstance(output_block, SFC_Divergence) or move:
+                    output_block.RefreshOutputModel(move)
+    
+    # Refreshes the step model
+    def RefreshModel(self, move=True):
+        self.Parent.RefreshStepModel(self)
+        if self.Action:
+            action = self.GetActionConnector()
+            if action:
+                action_block = action.GetParentBlock()
+                action_block.RefreshModel(False)
+        # If step has moved, refresh the model of wires connected to output
+        if move:
+            self.RefreshInputModel()
+            self.RefreshOutputModel(self.Initial)
+    
+    # Draws step
+    def Draw(self, dc):
+        dc.SetPen(wxBLACK_PEN)
+        dc.SetBrush(wxWHITE_BRUSH)
+        # Draw two rectangles for representing the step
+        dc.DrawRectangle(self.Pos.x, self.Pos.y, self.Size[0] + 1, self.Size[1] + 1)
+        if self.Initial:
+            dc.DrawRectangle(self.Pos.x + 2, self.Pos.y + 2, self.Size[0] - 3, self.Size[1] - 3)
+        # Draw step name
+        namewidth, nameheight = dc.GetTextExtent(self.Name)
+        dc.DrawText(self.Name, self.Pos.x + (self.Size[0] - namewidth) / 2,
+                    self.Pos.y + (self.Size[1] - nameheight) / 2)
+        # Draw input and output connectors
+        if self.Input:
+            self.Input.Draw(dc)
+        if self.Output:
+            self.Output.Draw(dc)
+        if self.Action:
+            self.Action.Draw(dc)
+        Graphic_Element.Draw(self, dc)
+
+#-------------------------------------------------------------------------------
+#                       Sequencial Function Chart Transition
+#-------------------------------------------------------------------------------
+
+"""
+Class that implements the graphic representation of a transition
+"""
+
+class SFC_Transition(Graphic_Element):
+    
+    # Create a new transition
+    def __init__(self, parent, type = "reference", condition = "", id = None):
+        Graphic_Element.__init__(self, parent)
+        self.Type = type
+        self.Condition = condition
+        self.Id = id
+        self.Size = wxSize(SFC_TRANSITION_SIZE[0], SFC_TRANSITION_SIZE[1])
+        # Create an input and output connector
+        self.Input = Connector(self, "", "ANY", wxPoint(self.Size[0] / 2, 0), NORTH)
+        self.Output = Connector(self, "", "ANY", wxPoint(self.Size[0] / 2, self.Size[1]), SOUTH)
+    
+    # Destructor
+    def __del__(self):
+        self.Input = None
+        self.Output = None
+    
+    # Forbids to change the transition size
+    def SetSize(self, width, height):
+        pass
+    
+    # Forbids to resize the transition
+    def Resize(self, x, y, width, height):
+        pass
+    
+    # Delete this transition by calling the appropriate method
+    def Delete(self):
+        self.Parent.DeleteTransition(self)
+    
+    # Unconnect input and output
+    def Clean(self):
+        self.Input.UnConnect()
+        self.Output.UnConnect()
+    
+    # Refresh the transition bounding box
+    def RefreshBoundingBox(self):
+        dc = wxClientDC(self.Parent)
+        if self.Condition != "":
+            text_width, text_height = dc.GetTextExtent(self.Condition)
+        else:
+            text_width, text_height = dc.GetTextExtent("Transition")
+        # Calculate the bounding box size
+        bbx_width = self.Size[0] + CONNECTOR_SIZE + 2 + text_width
+        bbx_y = self.Pos.y - max(0, (text_height - self.Size[1]) / 2)
+        bbx_height = max(self.Size[1], text_height)
+        self.BoundingBox = wxRect(self.Pos.x, bbx_y, bbx_width + 1, bbx_height + 1)
+        
+    # Returns the connector connected to input
+    def GetPreviousConnector(self):
+        wires = self.Input.GetWires()
+        if len(wires) == 1:
+            return wires[0][0].EndConnected
+        return None
+    
+    # Returns the connector connected to output
+    def GetNextConnector(self):
+        wires = self.Output.GetWires()
+        if len(wires) == 1:
+            return wires[0][0].StartConnected
+        return None
+    
+    # Refresh the positions of the transition connectors
+    def RefreshConnectors(self):
+        # Update input position
+        self.Input.SetPosition(wxPoint(self.Size[0] / 2, 0))
+        # Update output position
+        self.Output.SetPosition(wxPoint(self.Size[0] / 2, self.Size[1]))
+        self.RefreshConnected()
+    
+    # Refresh the position of the wires connected to transition
+    def RefreshConnected(self, exclude = []):
+        self.Input.MoveConnected(exclude)
+        self.Output.MoveConnected(exclude)
+    
+    # Returns the transition connector that starts with the point given if it exists 
+    def GetConnector(self, position):
+        # Test input connector
+        input_pos = self.Input.GetRelPosition()
+        if position.x == self.Pos.x + input_pos.x and position.y == self.Pos.y + input_pos.y:
+            return self.Input
+        # Test output connector
+        output_pos = self.Output.GetRelPosition()
+        if position.x == self.Pos.x + output_pos.x and position.y == self.Pos.y + output_pos.y:
+            return self.Output
+        return None
+    
+    # Returns input and output transition connectors
+    def GetConnectors(self):
+        return {"input":self.Input,"output":self.Output}
+    
+    # Test if point given is on transition input or output connector
+    def TestConnector(self, pt, exclude=True):
+        # Test input connector
+        if self.Input.TestPoint(pt, exclude):
+            return self.Input
+        # Test output connector
+        if self.Output.TestPoint(pt, exclude):
+            return self.Output
+        return None
+
+    # Changes the transition type
+    def SetType(self, type):
+        self.Type = type
+        
+    # Returns the transition type
+    def GetType(self):
+        return self.Type
+
+    # Changes the transition condition
+    def SetCondition(self, condition):
+        self.Condition = condition
+        self.RefreshBoundingBox()
+
+    # Returns the transition condition
+    def GetCondition(self):
+        return self.Condition
+        
+    # Returns the transition minimum size
+    def GetMinSize(self):
+        return SFC_TRANSITION_SIZE
+    
+    # Align input element with this step
+    def RefreshInputPosition(self):
+        wires = self.Input.GetWires()
+        current_pos = self.Input.GetPosition(False)
+        input = self.GetPreviousConnector()
+        if input:
+            input_pos = input.GetPosition(False)
+            diffx = current_pos.x - input_pos.x
+            input_block = input.GetParentBlock()
+            if isinstance(input_block, SFC_Divergence):
+                input_block.MoveConnector(input, diffx)
+            else:
+                if isinstance(input_block, SFC_Step):
+                    input_block.MoveActionBlock((diffx, 0))
+                input_block.Move(diffx, 0)
+                input_block.RefreshInputPosition()
+    
+    # Align output element with this step
+    def RefreshOutputPosition(self, move = None):
+        wires = self.Output.GetWires()
+        if len(wires) != 1:
+            return
+        current_pos = self.Output.GetPosition(False)
+        output = wires[0][0].StartConnected
+        output_pos = output.GetPosition(False)
+        diffx = current_pos.x - output_pos.x
+        output_block = output.GetParentBlock()
+        if move:
+            if isinstance(output_block, SFC_Step):
+                output_block.MoveActionBlock(move)
+            wires[0][0].Move(move[0], move[1], True)
+            if not isinstance(output_block, SFC_Divergence) or output_block.GetConnectors()["inputs"].index(output) == 0:
+                output_block.Move(move[0], move[1], self.Parent.Wires)
+                output_block.RefreshOutputPosition(move)
+            else:
+                output_block.RefreshPosition()
+        elif isinstance(output_block, SFC_Divergence):
+            output_block.MoveConnector(output, diffx)
+        else:
+            if isinstance(output_block, SFC_Step):
+                output_block.MoveActionBlock((diffx, 0))
+            output_block.Move(diffx, 0)
+            output_block.RefreshOutputPosition()
+    
+    # Method called when a LeftDClick event have been generated
+    def OnLeftDClick(self, event, scaling):
+        # Edit the transition properties
+        self.Parent.EditTransitionContent(self)
+    
+    # Method called when a RightUp event have been generated
+    def OnRightUp(self, event, scaling):
+        # Popup the menu with special items for a step
+        self.Parent.PopupDefaultMenu()
+    
+    # Refreshes the transition state according to move defined and handle selected
+    def ProcessDragging(self, movex, movey):
+        self.Move(movex, 0)
+        self.RefreshInputPosition()
+        self.RefreshOutputPosition()
+    
+    # Refresh input element model
+    def RefreshInputModel(self):
+        input = self.GetPreviousConnector()
+        if input:
+            input_block = input.GetParentBlock()
+            input_block.RefreshModel(False)
+            if not isinstance(input_block, SFC_Divergence):
+                input_block.RefreshInputModel()
+    
+    # Refresh output element model
+    def RefreshOutputModel(self, move=False):
+        output = self.GetNextConnector()
+        if output:
+            output_block = output.GetParentBlock()
+            output_block.RefreshModel(False)
+            if not isinstance(output_block, SFC_Divergence) or move:
+                output_block.RefreshOutputModel(move)
+    
+    # Refreshes the transition model
+    def RefreshModel(self, move=True):
+        self.Parent.RefreshTransitionModel(self)
+        # If transition has moved, refresh the model of wires connected to output
+        if move:
+            self.RefreshInputModel()
+            self.RefreshOutputModel()
+    
+    # Draws transition
+    def Draw(self, dc):
+        dc.SetPen(wxBLACK_PEN)
+        dc.SetBrush(wxBLACK_BRUSH)
+        # Draw plain rectangle for representing the transition
+        dc.DrawRectangle(self.Pos.x, self.Pos.y, self.Size[0] + 1, self.Size[1] + 1)
+        # Draw transition condition
+        if self.Condition != "":
+            text_width, text_height = dc.GetTextExtent(self.Condition)
+            condition = self.Condition
+        else:
+            text_width, text_height = dc.GetTextExtent("Transition")
+            condition = "Transition"
+        dc.DrawText(condition, self.Pos.x + self.Size[0] + CONNECTOR_SIZE + 2,
+                    self.Pos.y + (self.Size[1] - text_height) / 2)
+        # Draw input and output connectors
+        self.Input.Draw(dc)
+        self.Output.Draw(dc)
+        Graphic_Element.Draw(self, dc)
+
+#-------------------------------------------------------------------------------
+#                Sequencial Function Chart Divergence and Convergence
+#-------------------------------------------------------------------------------
+
+"""
+Class that implements the graphic representation of a divergence or convergence,
+selection or simultaneous
+"""
+
+class SFC_Divergence(Graphic_Element):
+    
+    # Create a new divergence
+    def __init__(self, parent, type, number = 2, id = None):
+        Graphic_Element.__init__(self, parent)
+        self.Type = type
+        self.Id = id
+        self.RealConnectors = None
+        number = max(2, number)
+        if self.Type in [SELECTION_DIVERGENCE, SELECTION_CONVERGENCE]:
+            self.Size = wxSize((number - 1) * SFC_DEFAULT_SEQUENCE_INTERVAL, 1)
+        elif self.Type in [SIMULTANEOUS_DIVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+            self.Size = wxSize((number - 1) * SFC_DEFAULT_SEQUENCE_INTERVAL, 3)
+        # Create an input and output connector
+        if self.Type in [SELECTION_DIVERGENCE, SIMULTANEOUS_DIVERGENCE]:
+            self.Inputs = [Connector(self, "", "ANY", wxPoint(self.Size[0] / 2, 0), NORTH)]
+            self.Outputs = []
+            for i in xrange(number):
+                self.Outputs.append(Connector(self, "", "ANY", wxPoint(i * SFC_DEFAULT_SEQUENCE_INTERVAL, self.Size[1]), SOUTH))
+        elif self.Type in [SELECTION_CONVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+            self.Inputs = []
+            for i in xrange(number):
+                self.Inputs.append(Connector(self, "", "ANY", wxPoint(i * SFC_DEFAULT_SEQUENCE_INTERVAL, 0), NORTH))
+            self.Outputs = [Connector(self, "", "ANY", wxPoint(self.Size[0] / 2, self.Size[1]), SOUTH)]
+    
+    # Destructor
+    def __del__(self):
+        self.Inputs = []
+        self.Outputs = []
+    
+    # Forbids to resize the divergence
+    def Resize(self, x, y, width, height):
+        pass
+    
+    # Delete this divergence by calling the appropriate method
+    def Delete(self):
+        self.Parent.DeleteDivergence(self)
+    
+    # Returns the divergence type
+    def GetType(self):
+        return self.Type
+    
+    # Unconnect input and output
+    def Clean(self):
+        for input in self.Inputs:
+            input.UnConnect()
+        for output in self.Outputs:
+            output.UnConnect()
+    
+    # Add a branch to the divergence
+    def AddBranch(self):
+        if self.Type in [SELECTION_DIVERGENCE, SIMULTANEOUS_DIVERGENCE]:
+            maxx = 0
+            for output in self.Outputs:
+                pos = output.GetRelPosition()
+                maxx = max(maxx, pos.x)
+            connector = Connector(self, "", "ANY", wxPoint(maxx + SFC_DEFAULT_SEQUENCE_INTERVAL, self.Size[1]), SOUTH)
+            self.Outputs.append(connector)
+            self.MoveConnector(connector, 0)
+        elif self.Type in [SELECTION_CONVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+            maxx = 0
+            for input in self.Inputs:
+                pos = input.GetRelPosition()
+                maxx = max(maxx, pos.x)
+            connector = Connector(self, "", "ANY", wxPoint(maxx + SFC_DEFAULT_SEQUENCE_INTERVAL, 0), NORTH)
+            self.Inputs.append(connector)
+            self.MoveConnector(connector, SFC_DEFAULT_SEQUENCE_INTERVAL)
+    
+    # Remove a branch from the divergence
+    def RemoveBranch(self, connector):
+        if self.Type in [SELECTION_DIVERGENCE, SIMULTANEOUS_DIVERGENCE]:
+            if connector in self.Outputs:
+                self.Outputs.remove(connector)
+                self.MoveConnector(self.Outputs[0], 0)
+        elif self.Type in [SELECTION_CONVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+            if connector in self.Inputs:
+                self.Inputs.remove(connector)
+                self.MoveConnector(self.Inputs[0], 0)
+    
+    # Return the number of branches for the divergence
+    def GetBranchNumber(self):
+        if self.Type in [SELECTION_DIVERGENCE, SIMULTANEOUS_DIVERGENCE]:
+            return len(self.Outputs)
+        elif self.Type in [SELECTION_CONVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+            return len(self.Inputs)
+    
+    # Returns if the point given is in the bounding box
+    def HitTest(self, pt):
+        rect = self.BoundingBox
+        return rect.InsideXY(pt.x, pt.y) or self.TestConnector(pt, False) != None
+    
+    # Refresh the divergence bounding box
+    def RefreshBoundingBox(self):
+        if self.Type in [SELECTION_DIVERGENCE, SELECTION_CONVERGENCE]:
+            self.BoundingBox = wxRect(self.Pos.x, self.Pos.y - CONNECTOR_SIZE, 
+                self.Size[0] + 1, self.Size[1] + CONNECTOR_SIZE * 2 + 1)
+        elif self.Type in [SIMULTANEOUS_DIVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+            self.BoundingBox = wxRect(self.Pos.x - SFC_SIMULTANEOUS_SEQUENCE_EXTRA, self.Pos.y - CONNECTOR_SIZE, 
+                self.Size[0] + 2 * SFC_SIMULTANEOUS_SEQUENCE_EXTRA + 1, self.Size[1] + CONNECTOR_SIZE * 2 + 1)
+    
+    # Refresh the position of wires connected to divergence
+    def RefreshConnected(self, exclude = []):
+        for input in self.Inputs:
+            input.MoveConnected(exclude)
+        for output in self.Outputs:
+            output.MoveConnected(exclude)
+    
+    # Moves the divergence connector given
+    def MoveConnector(self, connector, movex):
+        position = connector.GetRelPosition()
+        connector.SetPosition(wxPoint(position.x + movex, position.y))
+        minx = self.Size[0]
+        maxx = 0
+        for input in self.Inputs:
+            input_pos = input.GetRelPosition()
+            minx = min(minx, input_pos.x)
+            maxx = max(maxx, input_pos.x)
+        for output in self.Outputs:
+            output_pos = output.GetRelPosition()
+            minx = min(minx, output_pos.x)
+            maxx = max(maxx, output_pos.x)
+        if minx != 0:
+            for input in self.Inputs:
+                input_pos = input.GetRelPosition()
+                input.SetPosition(wxPoint(input_pos.x - minx, input_pos.y))
+            for output in self.Outputs:
+                output_pos = output.GetRelPosition()
+                output.SetPosition(wxPoint(output_pos.x - minx, output_pos.y))
+        self.Pos.x += minx
+        self.Size[0] = maxx - minx
+        connector.MoveConnected()
+        self.RefreshBoundingBox()
+    
+    # Returns the divergence connector that starts with the point given if it exists 
+    def GetConnector(self, position):
+        # Test input connector
+        for input in self.Inputs:
+            input_pos = input.GetPosition(False)
+            if position.x == input_pos.x and position.y == input_pos.y:
+                return input
+        # Test output connector
+        for output in self.Outputs:
+            output_pos = output.GetPosition(False)
+            if position.x == output_pos.x and position.y == output_pos.y:
+                return output
+        return None
+    
+    # Returns input and output divergence connectors 
+    def GetConnectors(self):
+        return {"inputs":self.Inputs,"outputs":self.Outputs}
+    
+    # Test if point given is on divergence input or output connector
+    def TestConnector(self, pt, exclude=True):
+        # Test input connector
+        for input in self.Inputs:
+            if input.TestPoint(pt, exclude):
+                return input
+        # Test output connector
+        for output in self.Outputs:
+            if output.TestPoint(pt, exclude):
+                return output
+        return None
+    
+    # Changes the divergence size
+    def SetSize(self, width, height):
+        for i, input in enumerate(self.Inputs):
+            position = input.GetRelPosition()
+            if self.RealConnectors:
+                input.SetPosition(wxPoint(int(round(self.RealConnectors["Inputs"][i] * width)), position.y))
+            else:
+                input.SetPosition(wxPoint(int(round(float(position.x)*float(width)/float(self.Size[0]))), position.y))
+            input.MoveConnected()
+        for i, output in enumerate(self.Outputs):
+            position = output.GetRelPosition()
+            if self.RealConnectors:
+                output.SetPosition(wxPoint(int(round(self.RealConnectors["Outputs"][i] * width)), position.y))
+            else:
+                output.SetPosition(wxPoint(int(round(float(position.x)*float(width)/float(self.Size[0]))), position.y))
+            output.MoveConnected()
+        self.Size = wxSize(width, self.Size[1])
+        self.RefreshBoundingBox()
+    
+    # Returns the divergence minimum size
+    def GetMinSize(self):
+        return 0, self.Size[1]
+    
+    # Refresh the position of the block connected to connector
+    def RefreshConnectedPosition(self, connector):
+        wires = connector.GetWires()
+        if len(wires) != 1:
+            return
+        current_pos = connector.GetPosition(False)
+        if connector in self.Inputs:
+            next = wires[0][0].EndConnected
+        else:
+            next = wires[0][0].StartConnected
+        next_pos = next.GetPosition(False)
+        diffx = current_pos.x - next_pos.x
+        next_block = next.GetParentBlock()
+        if isinstance(next_block, SFC_Divergence):
+            next_block.MoveConnector(next, diffx)
+        else:
+            next_block.Move(diffx, 0)
+            if connector in self.Inputs:
+                next_block.RefreshInputPosition()
+            else:
+                next_block.RefreshOutputPosition()
+    
+    # Refresh the position of this divergence
+    def RefreshPosition(self):
+        y = 0
+        for input in self.Inputs:
+            wires = input.GetWires()
+            if len(wires) != 1:
+                return
+            previous = wires[0][0].EndConnected
+            previous_pos = previous.GetPosition(False)
+            y = max(y, previous_pos.y + GetWireSize(previous.GetParentBlock()))
+        diffy = y - self.Pos.y
+        if diffy != 0:
+            self.Move(0, diffy, self.Parent.Wires)
+            self.RefreshOutputPosition((0, diffy))
+        for input in self.Inputs:
+            input.MoveConnected()
+    
+    # Align output element with this divergence
+    def RefreshOutputPosition(self, move = None):
+        if move:
+            for output_connector in self.Outputs:
+                wires = output_connector.GetWires()
+                if len(wires) != 1:
+                    return
+                current_pos = output_connector.GetPosition(False)
+                output = wires[0][0].StartConnected
+                output_pos = output.GetPosition(False)
+                diffx = current_pos.x - output_pos.x
+                output_block = output.GetParentBlock()
+                if isinstance(output_block, SFC_Step):
+                    output_block.MoveActionBlock(move)
+                wires[0][0].Move(move[0], move[1], True)
+                if not isinstance(output_block, SFC_Divergence) or output_block.GetConnectors()["inputs"].index(output) == 0:
+                    output_block.Move(move[0], move[1], self.Parent.Wires)
+                    output_block.RefreshOutputPosition(move)
+    
+    # Method called when a LeftDown event have been generated
+    def OnLeftDown(self, event, scaling):
+        pos = GetScaledEventPosition(event, scaling)
+        # Test if a connector have been handled
+        connector = self.TestConnector(pos, False)
+        if connector:
+            self.Handle = (HANDLE_CONNECTOR, connector)
+            self.Parent.SetCursor(wxStockCursor(wxCURSOR_HAND))
+            self.Selected = False
+            # Initializes the last position
+            self.oldPos = GetScaledEventPosition(event, scaling)
+        else:
+            self.RealConnectors = {"Inputs":[],"Outputs":[]}
+            for input in self.Inputs:
+                position = input.GetRelPosition()
+                self.RealConnectors["Inputs"].append(float(position.x)/float(self.Size[0]))
+            for output in self.Outputs:
+                position = output.GetRelPosition()
+                self.RealConnectors["Outputs"].append(float(position.x)/float(self.Size[0]))
+            Graphic_Element.OnLeftDown(self, event, scaling)
+    
+    # Method called when a LeftUp event have been generated
+    def OnLeftUp(self, event, scaling):
+        self.RealConnectors = None
+        handle_type, handle = self.Handle
+        if handle_type == HANDLE_CONNECTOR:
+            wires = handle.GetWires()
+            if len(wires) != 1:
+                return
+            if handle in self.Inputs:
+                block = wires[0][0].EndConnected.GetParentBlock()
+            else:
+                block = wires[0][0].StartConnected.GetParentBlock()
+            block.RefreshModel(False)
+            if not isinstance(block, SFC_Divergence):
+                if handle in self.Inputs:
+                    block.RefreshInputModel()
+                else:
+                    block.RefreshOutputModel()
+        Graphic_Element.OnLeftUp(self, event, scaling)
+    
+    # Method called when a RightUp event have been generated
+    def OnRightUp(self, event, scaling):
+        pos = GetScaledEventPosition(event, scaling)
+        # Popup the menu with special items for a block and a connector if one is handled
+        connector = self.TestConnector(pos, False)
+        if connector:
+            self.Handle = (HANDLE_CONNECTOR, connector)
+            self.Parent.PopupDivergenceMenu(True)
+        else:
+            # Popup the divergence menu without delete branch
+            self.Parent.PopupDivergenceMenu(False)
+    
+    # Refreshes the divergence state according to move defined and handle selected
+    def ProcessDragging(self, movex, movey):
+        handle_type, handle = self.Handle
+        # A connector has been handled
+        if handle_type == HANDLE_CONNECTOR:
+            self.MoveConnector(handle, movex)
+            self.RefreshConnectedPosition(handle)
+    
+    # Refresh output element model
+    def RefreshOutputModel(self, move=False):
+        if move:
+            for output in self.Outputs:
+                wires = output.GetWires()
+                if len(wires) != 1:
+                    return
+                output_block = wires[0][0].StartConnected.GetParentBlock()
+                output_block.RefreshModel(False)
+                if not isinstance(output_block, SFC_Divergence) or move:
+                    output_block.RefreshOutputModel(move)
+    
+    # Refreshes the divergence model
+    def RefreshModel(self, move=True):
+        self.Parent.RefreshDivergenceModel(self)
+        # If divergence has moved, refresh the model of wires connected to outputs
+        if move:
+            self.RefreshOutputModel()
+    
+    # Draws divergence
+    def Draw(self, dc):
+        dc.SetPen(wxBLACK_PEN)
+        dc.SetBrush(wxBLACK_BRUSH)
+        # Draw plain rectangle for representing the divergence
+        if self.Type in [SELECTION_DIVERGENCE, SELECTION_CONVERGENCE]:
+            dc.DrawRectangle(self.Pos.x, self.Pos.y, self.Size[0] + 1, self.Size[1] + 1)
+        elif self.Type in [SIMULTANEOUS_DIVERGENCE, SIMULTANEOUS_CONVERGENCE]:
+            dc.DrawLine(self.Pos.x - SFC_SIMULTANEOUS_SEQUENCE_EXTRA, self.Pos.y, 
+                        self.Pos.x + self.Size[0] + SFC_SIMULTANEOUS_SEQUENCE_EXTRA + 1, self.Pos.y)
+            dc.DrawLine(self.Pos.x - SFC_SIMULTANEOUS_SEQUENCE_EXTRA, self.Pos.y + 3, 
+                        self.Pos.x + self.Size[0] + SFC_SIMULTANEOUS_SEQUENCE_EXTRA + 1, self.Pos.y + 3)
+        # Draw inputs and outputs connectors
+        for input in self.Inputs:
+            input.Draw(dc)
+        for output in self.Outputs:
+            output.Draw(dc)
+        Graphic_Element.Draw(self, dc)
+
+#-------------------------------------------------------------------------------
+#                   Sequencial Function Chart Jump to Step
+#-------------------------------------------------------------------------------
+
+"""
+Class that implements the graphic representation of a jump to step
+"""
+
+class SFC_Jump(Graphic_Element):
+    
+    # Create a new jump
+    def __init__(self, parent, target, id = None):
+        Graphic_Element.__init__(self, parent)
+        self.Target = target
+        self.Id = id
+        self.Size = wxSize(SFC_JUMP_SIZE[0], SFC_JUMP_SIZE[1])
+        # Create an input and output connector
+        self.Input = Connector(self, "", "ANY", wxPoint(self.Size[0] / 2, 0), NORTH)
+        
+    # Destructor
+    def __del__(self):
+        self.Inputs = None
+    
+    # Forbids to change the jump size
+    def SetSize(self, width, height):
+        pass
+    
+    # Forbids to resize jump
+    def Resize(self, x, y, width, height):
+        pass
+    
+    # Delete this jump by calling the appropriate method
+    def Delete(self):
+        self.Parent.DeleteJump(self)
+    
+    # Unconnect input
+    def Clean(self):
+        if self.Input:
+            self.Input.UnConnect()
+    
+    # Refresh the jump bounding box
+    def RefreshBoundingBox(self):
+        dc = wxClientDC(self.Parent)
+        text_width, text_height = dc.GetTextExtent(self.Target)
+        # Calculate the bounding box size
+        bbx_width = self.Size[0] + 2 + text_width
+        self.BoundingBox = wxRect(self.Pos.x, self.Pos.y - CONNECTOR_SIZE, 
+                bbx_width + 1, self.Size[1] + CONNECTOR_SIZE + 1)
+    
+    # Returns the connector connected to input
+    def GetPreviousConnector(self):
+        if self.Input:
+            wires = self.Input.GetWires()
+            if len(wires) == 1:
+                return wires[0][0].EndConnected
+        return None
+    
+    # Refresh the position of wires connected to jump
+    def RefreshConnected(self, exclude = []):
+        if self.Input:
+            self.Input.MoveConnected(exclude)
+    
+    # Returns input jump connector 
+    def GetConnector(self, position = None):
+        return self.Input
+    
+    # Test if point given is on jump input connector
+    def TestConnector(self, pt, exclude = True):
+        # Test input connector
+        if self.Input and self.Input.TestPoint(pt, exclude):
+            return self.Input
+        return None
+    
+    # Changes the jump target
+    def SetTarget(self, target):
+        self.Target = target
+        self.RefreshBoundingBox()
+    
+    # Returns the jump target
+    def GetTarget(self):
+        return self.Target
+    
+    # Returns the jump minimum size
+    def GetMinSize(self):
+        return SFC_JUMP_SIZE
+    
+    # Align input element with this jump
+    def RefreshInputPosition(self):
+        if self.Input:
+            current_pos = self.Input.GetPosition(False)
+            input = self.GetPreviousConnector()
+            if input:
+                input_pos = input.GetPosition(False)
+                diffx = current_pos.x - input_pos.x
+                input_block = input.GetParentBlock()
+                if isinstance(input_block, SFC_Divergence):
+                    input_block.MoveConnector(input, diffx)
+                else:
+                    if isinstance(input_block, SFC_Step):
+                        input_block.MoveActionBlock((diffx, 0))
+                    input_block.Move(diffx, 0)
+                    input_block.RefreshInputPosition()
+    
+    # Can't align output element, because there is no output
+    def RefreshOutputPosition(self, move = None):
+        pass
+    
+    # Method called when a LeftDClick event have been generated
+    def OnLeftDClick(self, event, scaling):
+        # Edit the jump properties
+        self.Parent.EditJumpContent(self)
+    
+    # Method called when a RightUp event have been generated
+    def OnRightUp(self, event, scaling):
+        # Popup the default menu
+        self.Parent.PopupDefaultMenu()
+    
+    # Refreshes the jump state according to move defined and handle selected
+    def ProcessDragging(self, movex, movey):
+        self.Move(movex, 0)
+        self.RefreshInputPosition()
+    
+    # Refresh input element model
+    def RefreshInputModel(self):
+        input = self.GetPreviousConnector()
+        if input:
+            input_block = input.GetParentBlock()
+            input_block.RefreshModel(False)
+            if not isinstance(input_block, SFC_Divergence):
+                input_block.RefreshInputModel()
+    
+    # Refresh output element model
+    def RefreshOutputModel(self, move=False):
+        pass
+    
+    # Refreshes the jump model
+    def RefreshModel(self, move=True):
+        self.Parent.RefreshJumpModel(self)
+        if move:
+            self.RefreshInputModel()
+    
+    # Draws divergence
+    def Draw(self, dc):
+        dc.SetPen(wxBLACK_PEN)
+        dc.SetBrush(wxBLACK_BRUSH)
+        # Draw plain rectangle for representing the divergence
+        dc.DrawLine(self.Pos.x + self.Size[0] / 2, self.Pos.y, self.Pos.x + self.Size[0] / 2, self.Pos.y + self.Size[1])
+        points = [wxPoint(self.Pos.x, self.Pos.y),
+                  wxPoint(self.Pos.x + self.Size[0] / 2, self.Pos.y + self.Size[1] / 3),
+                  wxPoint(self.Pos.x + self.Size[0], self.Pos.y),
+                  wxPoint(self.Pos.x + self.Size[0] / 2, self.Pos.y + self.Size[1])]
+        dc.DrawPolygon(points)
+        text_width, text_height = dc.GetTextExtent(self.Target)
+        dc.DrawText(self.Target, self.Pos.x + self.Size[0] + 2,
+                    self.Pos.y + (self.Size[1] - text_height) / 2)
+        # Draw input connector
+        if self.Input:
+            self.Input.Draw(dc)
+        Graphic_Element.Draw(self, dc)
+
+
+#-------------------------------------------------------------------------------
+#                   Sequencial Function Chart Action Block
+#-------------------------------------------------------------------------------
+
+"""
+Class that implements the graphic representation of an action block
+"""
+
+class SFC_ActionBlock(Graphic_Element):
+    
+    # Create a new action block
+    def __init__(self, parent, actions = [], id = None):
+        Graphic_Element.__init__(self, parent)
+        self.Id = id
+        self.Size = wxSize(SFC_ACTION_MIN_SIZE[0], SFC_ACTION_MIN_SIZE[1])
+        # Create an input and output connector
+        self.Input = Connector(self, "", "ANY", wxPoint(0, SFC_ACTION_MIN_SIZE[1] / 2), WEST)
+        self.SetActions(actions)
+    
+    # Destructor
+    def __del__(self):
+        self.Input = None
+    
+    # Returns the number of action lines
+    def GetLineNumber(self):
+        return len(self.Actions)
+    
+    # Forbids to resize the action block
+    def Resize(self, x, y, width, height):
+        if x == 0:
+            self.SetSize(width, self.Size[1])
+    
+    # Delete this action block by calling the appropriate method
+    def Delete(self):
+        self.Parent.DeleteActionBlock(self)
+    
+    # Unconnect input and output
+    def Clean(self):
+        self.Input.UnConnect()
+        
+    # Refresh the action block bounding box
+    def RefreshBoundingBox(self):
+        self.BoundingBox = wxRect(self.Pos.x, self.Pos.y, self.Size[0], self.Size[1])
+    
+    # Refresh the position of wires connected to action block
+    def RefreshConnected(self, exclude = []):
+        self.Input.MoveConnected(exclude)
+    
+    # Returns input action block connector 
+    def GetConnector(self, position = None):
+        return self.Input
+    
+    # Test if point given is on action block input connector
+    def TestConnector(self, pt, exclude = True):
+        # Test input connector
+        if self.Input.TestPoint(pt, exclude):
+            return self.Input
+        return None
+    
+    # Changes the action block actions
+    def SetActions(self, actions):
+        dc = wxClientDC(self.Parent)
+        self.Actions = actions
+        self.ColSize = [0, 0, 0]
+        for action in self.Actions:
+            width, height = dc.GetTextExtent(action["qualifier"])
+            self.ColSize[0] = max(self.ColSize[0], width + 10)
+            if "duration" in action:
+                width, height = dc.GetTextExtent("T#%s"%action["duration"])
+                self.ColSize[0] = max(self.ColSize[0], width + 10)
+            width, height = dc.GetTextExtent(action["value"])
+            self.ColSize[1] = max(self.ColSize[1], width + 10)
+            if "indicator" in action and action["indicator"] != "":
+                width, height = dc.GetTextExtent(action["indicator"])
+                self.ColSize[2] = max(self.ColSize[2], width + 10)
+        self.Size = wxSize(max(self.ColSize[0] + self.ColSize[1] + self.ColSize[2],
+            self.Size[0]), len(self.Actions) * SFC_ACTION_MIN_SIZE[1])
+        self.RefreshBoundingBox()
+        if self.Input:
+            wires = self.Input.GetWires()
+            if len(wires) == 1:
+                input_block = wires[0][0].EndConnected.GetParentBlock()
+                input_block.RefreshOutputPosition()
+                input_block.RefreshOutputModel(True)
+    
+    # Returns the action block actions
+    def GetActions(self):
+        return self.Actions
+    
+    # Returns the action block minimum size
+    def GetMinSize(self):
+        return SFC_ACTION_MIN_SIZE[0], len(self.Actions) * SFC_ACTION_MIN_SIZE[1]
+    
+    # Method called when a LeftDClick event have been generated
+    def OnLeftDClick(self, event, scaling):
+        # Edit the action block properties
+        self.Parent.EditActionBlockContent(self)
+    
+    # Refreshes the action block state according to move defined and handle selected
+    def ProcessDragging(self, movex, movey):
+        handle_type, handle = self.Handle
+        if handle_type == HANDLE_MOVE:
+            wires = self.Input.GetWires()
+            if len(wires) == 1:
+                input_pos = wires[0][0].EndConnected.GetPosition(False)
+                if self.Pos.x - input_pos.x + movex >= SFC_WIRE_MIN_SIZE:
+                    self.Move(movex, 0)
+        else:
+            Graphic_Element.ProcessDragging(self, movex, movey)
+    
+   # Refreshes the action block model
+    def RefreshModel(self, move=True):
+        self.Parent.RefreshActionBlockModel(self)
+    
+    # Draws divergence
+    def Draw(self, dc):
+        dc.SetPen(wxBLACK_PEN)
+        dc.SetBrush(wxWHITE_BRUSH)
+        colsize = [self.ColSize[0], self.Size[0] - self.ColSize[0] - self.ColSize[2], self.ColSize[2]]
+        # Draw plain rectangle for representing the action block
+        dc.DrawRectangle(self.Pos.x, self.Pos.y, self.Size[0] + 1, self.Size[1] + 1)
+        dc.DrawLine(self.Pos.x + colsize[0], self.Pos.y, 
+                self.Pos.x + colsize[0], self.Pos.y + self.Size[1])
+        dc.DrawLine(self.Pos.x + colsize[0] + colsize[1], self.Pos.y, 
+                self.Pos.x + colsize[0] + colsize[1], self.Pos.y + self.Size[1])
+        for i, action in enumerate(self.Actions):
+            if i != 0:
+                dc.DrawLine(self.Pos.x, self.Pos.y + i * SFC_ACTION_MIN_SIZE[1], 
+                    self.Pos.x + self.Size[0], self.Pos.y + i * SFC_ACTION_MIN_SIZE[1])
+            text_width, text_height = dc.GetTextExtent(action["qualifier"])
+            if "duration" in action:
+                dc.DrawText(action["qualifier"], self.Pos.x + (colsize[0] - text_width) / 2,
+                    self.Pos.y + i * SFC_ACTION_MIN_SIZE[1] + SFC_ACTION_MIN_SIZE[1] / 2 - text_height)
+                text_width, text_height = dc.GetTextExtent("T#%s"%action["duration"])
+                dc.DrawText("T#%s"%action["duration"], self.Pos.x + (colsize[0] - text_width) / 2,
+                    self.Pos.y + i * SFC_ACTION_MIN_SIZE[1] + SFC_ACTION_MIN_SIZE[1] / 2)
+            else:
+                dc.DrawText(action["qualifier"], self.Pos.x + (colsize[0] - text_width) / 2,
+                        self.Pos.y + i * SFC_ACTION_MIN_SIZE[1] + (SFC_ACTION_MIN_SIZE[1] - text_height) / 2)
+            text_width, text_height = dc.GetTextExtent(action["value"])
+            dc.DrawText(action["value"], self.Pos.x + colsize[0] + (colsize[1] - text_width) / 2,
+                    self.Pos.y + i * SFC_ACTION_MIN_SIZE[1] + (SFC_ACTION_MIN_SIZE[1] - text_height) / 2)
+            if "indicator" in action:
+                text_width, text_height = dc.GetTextExtent(action["indicator"])
+                dc.DrawText(action["indicator"], self.Pos.x + colsize[0] + colsize[1] + (colsize[2] - text_width) / 2,
+                        self.Pos.y + i * SFC_ACTION_MIN_SIZE[1] + (SFC_ACTION_MIN_SIZE[1] - text_height) / 2)
+        # Draw input connector
+        self.Input.Draw(dc)
+        Graphic_Element.Draw(self, dc)