LDViewer.py
author laurent
Sun, 08 Jan 2012 19:16:58 +0100
changeset 616 8a60ffcfd70b
parent 586 9aa96a36cf33
child 650 aaa3b02d42b1
permissions -rw-r--r--
Adding support for drag'n dropping variable from global defined in configurations and resources to POU variable panel or body editor for declaring external variables
Adding support for drag'n dropping located variables from topology panel to configurations and resources variable panel for declaring global located variables
#!/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

import wx
import time
from types import *

from Viewer import *

def ExtractNextBlocks(block, block_list):
    current_list = [block]
    while len(current_list) > 0:
        next_list = []
        for current in current_list:
            connectors = current.GetConnectors()
            input_connectors = []
            if isinstance(current, LD_PowerRail) and current.GetType() == RIGHTRAIL:
                input_connectors = connectors
            else:
                if "inputs" in connectors:
                    input_connectors = connectors["inputs"]
                if "input" in connectors:
                    input_connectors = [connectors["input"]]
            for connector in input_connectors:
                for wire, handle in connector.GetWires():
                    next = wire.EndConnected.GetParentBlock()
                    if not isinstance(next, LD_PowerRail) and next not in block_list:
                        block_list.append(next)
                        next_list.append(next)
        current_list = next_list
    
def CalcBranchSize(elements, stops):
    branch_size = 0
    stop_list = stops
    for stop in stops:
        ExtractNextBlocks(stop, stop_list)
    element_tree = {}
    for element in elements:
        if element not in element_tree:
            element_tree[element] = {"parents":["start"], "children":[], "weight":None}
            GenerateTree(element, element_tree, stop_list)
        elif element_tree[element]:
            element_tree[element]["parents"].append("start")
    remove_stops = {"start":[], "stop":[]}
    for element, values in element_tree.items():
        if "stop" in values["children"]:
            removed = []
            for child in values["children"]:
                if child != "stop":
##                    if child in elements:
##                        RemoveElement(child, element_tree)
##                        removed.append(child)
                    if "start" in element_tree[child]["parents"]:
                        if element not in remove_stops["stop"]:
                            remove_stops["stop"].append(element)
                        if child not in remove_stops["start"]:
                            remove_stops["start"].append(child)
            for child in removed:
                values["children"].remove(child)
    for element in remove_stops["start"]:
        element_tree[element]["parents"].remove("start")
    for element in remove_stops["stop"]:
        element_tree[element]["children"].remove("stop")
    for element, values in element_tree.items():
        if values and "stop" in values["children"]:
            CalcWeight(element, element_tree)
            if values["weight"]:
                branch_size += values["weight"]
            else:
                return 1
    #print branch_size
    return branch_size

def RemoveElement(remove, element_tree):
    if remove in element_tree and element_tree[remove]:
        for child in element_tree[remove]["children"]:
            if child != "stop":
                RemoveElement(child, element_tree)
        element_tree.pop(remove)
##        element_tree[remove] = None

def GenerateTree(element, element_tree, stop_list):
    if element in element_tree:
        connectors = element.GetConnectors()
        input_connectors = []
        if isinstance(element, LD_PowerRail) and element.GetType() == RIGHTRAIL:
            input_connectors = connectors
        else:
            if "inputs" in connectors:
                input_connectors = connectors["inputs"]
            if "input" in connectors:
                input_connectors = [connectors["input"]]
        for connector in input_connectors:
            for wire, handle in connector.GetWires():
                next = wire.EndConnected.GetParentBlock()
                if isinstance(next, LD_PowerRail) and next.GetType() == LEFTRAIL or next in stop_list:
##                    for remove in element_tree[element]["children"]:
##                        RemoveElement(remove, element_tree)
##                    element_tree[element]["children"] = ["stop"]
                    element_tree[element]["children"].append("stop")
##                elif element_tree[element]["children"] == ["stop"]:
##                    element_tree[next] = None
                elif next not in element_tree or element_tree[next]:
                    element_tree[element]["children"].append(next)
                    if next in element_tree:
                        element_tree[next]["parents"].append(element)
                    else:
                        element_tree[next] = {"parents":[element], "children":[], "weight":None}
                        GenerateTree(next, element_tree, stop_list)

def CalcWeight(element, element_tree):
    weight = 0
    parts = None
    if element in element_tree:
        for parent in element_tree[element]["parents"]:
            if parent == "start":
                weight += 1
            elif parent in element_tree:
                if not parts:
                    parts = len(element_tree[parent]["children"])
                else:
                    parts = min(parts, len(element_tree[parent]["children"]))
                if not element_tree[parent]["weight"]:
                    CalcWeight(parent, element_tree)
                if element_tree[parent]["weight"]:
                    weight += element_tree[parent]["weight"]
                else:
                    element_tree[element]["weight"] = None
                    return
            else:
                element_tree[element]["weight"] = None
                return
        if not parts:
            parts = 1
        element_tree[element]["weight"] = max(1, weight / parts)


#-------------------------------------------------------------------------------
#                     Ladder Diagram Graphic elements Viewer class
#-------------------------------------------------------------------------------


"""
Class derived from Viewer class that implements a Viewer of Ladder Diagram
"""

class LD_Viewer(Viewer):

    def __init__(self, parent, tagname, window, controler, debug = False, instancepath = ""):
        Viewer.__init__(self, parent, tagname, window, controler, debug, instancepath)
        self.Rungs = []
        self.RungComments = []
        self.CurrentLanguage = "LD"

#-------------------------------------------------------------------------------
#                          Refresh functions
#-------------------------------------------------------------------------------

    def ResetView(self):
        self.Rungs = []
        self.RungComments = []
        Viewer.ResetView(self)

    def RefreshView(self, variablepanel=True, selection=None):
        Viewer.RefreshView(self, variablepanel, selection)
        wx.CallAfter(self.Refresh)
        for i, rung in enumerate(self.Rungs):
            bbox = rung.GetBoundingBox()
            if i < len(self.RungComments):
                if self.RungComments[i]:
                    pos = self.RungComments[i].GetPosition()
                    if pos[1] > bbox.y:
                        self.RungComments.insert(i, None)
            else:
                self.RungComments.insert(i, None)
    
    def loadInstance(self, instance, ids, selection):
        Viewer.loadInstance(self, instance, ids, selection)
        if self.GetDrawingMode() != FREEDRAWING_MODE:
            if instance["type"] == "leftPowerRail":
                element = self.FindElementById(instance["id"])
                rung = Graphic_Group(self)
                rung.SelectElement(element)
                self.Rungs.append(rung)
            elif instance["type"] == "rightPowerRail":
                rungs = []
                for connector in instance["inputs"]:
                    for link in connector["links"]:
                        connected = self.FindElementById(link["refLocalId"])
                        rung = self.FindRung(connected)
                        if rung not in rungs:
                            rungs.append(rung)
                if len(rungs) > 1:
                    raise ValueError, _("Ladder element with id %d is on more than one rung.")%instance["id"]
                element = self.FindElementById(instance["id"])
                element_connectors = element.GetConnectors()
                self.Rungs[rungs[0]].SelectElement(element)
                for connector in element_connectors["inputs"]:
                    for wire, num in connector.GetWires():
                        self.Rungs[rungs[0]].SelectElement(wire)
                wx.CallAfter(self.RefreshPosition, element)
            elif instance["type"] in ["contact", "coil"]:
                rungs = []
                for link in instance["inputs"][0]["links"]:
                    connected = self.FindElementById(link["refLocalId"])
                    rung = self.FindRung(connected)
                    if rung not in rungs:
                        rungs.append(rung)
                if len(rungs) > 1:
                    raise ValueError, _("Ladder element with id %d is on more than one rung.")%instance["id"]
                element = self.FindElementById(instance["id"])
                element_connectors = element.GetConnectors() 
                self.Rungs[rungs[0]].SelectElement(element)
                for wire, num in element_connectors["inputs"][0].GetWires():
                    self.Rungs[rungs[0]].SelectElement(wire)
                wx.CallAfter(self.RefreshPosition, element)
            elif instance["type"] == "comment":
                element = self.FindElementById(instance["id"])
                pos = element.GetPosition()
                i = 0
                inserted = False
                while i < len(self.RungComments) and not inserted: 
                    ipos = self.RungComments[i].GetPosition()
                    if pos[1] < ipos[1]:
                        self.RungComments.insert(i, element)
                        inserted = True
                    i += 1
                if not inserted:
                    self.RungComments.append(element)
            
#-------------------------------------------------------------------------------
#                          Search Element functions
#-------------------------------------------------------------------------------

    def FindRung(self, element):
        for i, rung in enumerate(self.Rungs):
            if rung.IsElementIn(element):
                return i
        return None

    def FindElement(self, event, exclude_group = False):
        if self.GetDrawingMode() == FREEDRAWING_MODE:
            return Viewer.FindElement(self, event, exclude_group)
        
        dc = self.GetLogicalDC()
        pos = event.GetLogicalPosition(dc)
        if self.SelectedElement and not isinstance(self.SelectedElement, (Graphic_Group, Wire)):
            if self.SelectedElement.HitTest(pos) or self.SelectedElement.TestHandle(pos) != (0, 0):
                return self.SelectedElement
        elements = []
        for element in self.GetElements(sort_wires=True):
            if element.HitTest(pos) or element.TestHandle(event) != (0, 0):
                elements.append(element)
        if len(elements) == 1:
            return elements[0]
        elif len(elements) > 1:
            group = Graphic_Group(self)
            for element in elements:
                if self.IsBlock(element):
                    return element
                group.SelectElement(element)
            return group
        return None

    def SearchElements(self, bbox):
        elements = []
        for element in self.Blocks.values() + self.Comments.values():
            if element.IsInSelection(bbox):
                elements.append(element)
        return elements

#-------------------------------------------------------------------------------
#                          Mouse event functions
#-------------------------------------------------------------------------------

    def OnViewerLeftDown(self, event):
        if self.GetDrawingMode() == FREEDRAWING_MODE:
            Viewer.OnViewerLeftDown(self, event)
        elif self.Mode == MODE_SELECTION:
            element = self.FindElement(event)
            if self.SelectedElement:
                if not isinstance(self.SelectedElement, Graphic_Group):
                    if self.SelectedElement != element:
                        if self.IsWire(self.SelectedElement):
                            self.SelectedElement.SetSelectedSegment(None)
                        else:
                            self.SelectedElement.SetSelected(False)
                    else:
                        self.SelectedElement = None
                elif element and isinstance(element, Graphic_Group):
                    if self.SelectedElement.GetElements() != element.GetElements():
                        for elt in self.SelectedElement.GetElements():
                            if self.IsWire(elt):
                                elt.SetSelectedSegment(None)
                        self.SelectedElement.SetSelected(False)
                        self.SelectedElement = None
                else:
                    for elt in self.SelectedElement.GetElements():
                        if self.IsWire(elt):
                            elt.SetSelectedSegment(None)
                    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)
        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_SELECTION and self.SelectedElement:
            dc = self.GetLogicalDC() 
            if not isinstance(self.SelectedElement, Graphic_Group):
                if self.IsWire(self.SelectedElement):
                    result = self.SelectedElement.TestSegment(event.GetLogicalPosition(dc), True)
                    if result and result[1] in [EAST, WEST]:
                        self.SelectedElement.SetSelectedSegment(result[0])
                else:
                    self.SelectedElement.OnLeftUp(event, dc, self.Scaling)
            else:
                for element in self.SelectedElement.GetElements():
                    if self.IsWire(element):
                        result = element.TestSegment(event.GetLogicalPosition(dc), True)
                        if result and result[1] in [EAST, WEST]:
                            element.SetSelectedSegment(result[0])
                    else:
                        element.OnLeftUp(event, dc, self.Scaling)
            self.SelectedElement.Refresh()
            wx.CallAfter(self.SetCurrentCursor, 0)
        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()

#-------------------------------------------------------------------------------
#                          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 keycode == wx.WXK_DELETE and self.SelectedElement:
                if self.IsBlock(self.SelectedElement):
                    self.SelectedElement.Delete()
                elif self.IsWire(self.SelectedElement):
                    self.DeleteWire(self.SelectedElement)
                elif isinstance(self.SelectedElement, Graphic_Group):
                    all_wires = True
                    for element in self.SelectedElement.GetElements():
                        all_wires &= self.IsWire(element)
                    if all_wires:
                        self.DeleteWire(self.SelectedElement)
                    else:
                        self.SelectedElement.Delete()
                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():
                    self.Scroll(max(0, xpos - 1), ypos)
            elif keycode == wx.WXK_RIGHT:
                if event.ControlDown() and event.ShiftDown():
                    self.Scroll(xmax, ypos)
                elif event.ControlDown():
                    self.Scroll(min(xpos + 1, xmax), ypos)
            elif keycode == wx.WXK_UP:
                if event.ControlDown() and event.ShiftDown():
                    self.Scroll(xpos, 0)
                elif event.ControlDown():
                    self.Scroll(xpos, max(0, ypos - 1))
            elif keycode == wx.WXK_DOWN:
                if event.ControlDown() and event.ShiftDown():
                    self.Scroll(xpos, ymax)
                elif event.ControlDown():
                    self.Scroll(xpos, min(ypos + 1, ymax))
            else:
                event.Skip()

#-------------------------------------------------------------------------------
#                  Model adding functions from Drop Target
#-------------------------------------------------------------------------------

    def AddVariableBlock(self, x, y, scaling, var_class, var_name, var_type):
        if var_type == "BOOL":
            id = self.GetNewId()
            if var_class == INPUT:
                contact = LD_Contact(self, CONTACT_NORMAL, var_name, id)
                width, height = contact.GetMinSize()
                if scaling is not None:
                    x = round(float(x) / float(scaling[0])) * scaling[0]
                    y = round(float(y) / float(scaling[1])) * scaling[1]
                    width = round(float(width) / float(scaling[0]) + 0.5) * scaling[0]
                    height = round(float(height) / float(scaling[1]) + 0.5) * scaling[1]
                contact.SetPosition(x, y)
                contact.SetSize(width, height)
                self.AddBlock(contact)
                self.Controler.AddEditedElementContact(self.GetTagName(), id)
                self.RefreshContactModel(contact)
            else:
                coil = LD_Coil(self, COIL_NORMAL, var_name, id)
                width, height = coil.GetMinSize()
                if scaling is not None:
                    x = round(float(x) / float(scaling[0])) * scaling[0]
                    y = round(float(y) / float(scaling[1])) * scaling[1]
                    width = round(float(width) / float(scaling[0]) + 0.5) * scaling[0]
                    height = round(float(height) / float(scaling[1]) + 0.5) * scaling[1]
                coil.SetPosition(x, y)
                coil.SetSize(width, height)
                self.AddBlock(coil)
                self.Controler.AddEditedElementCoil(self.GetTagName(), id)
                self.RefreshCoilModel(coil)
            self.RefreshBuffer()
            self.RefreshScrollBars()
            self.RefreshVisibleElements()
            self.Refresh(False)
        else:
            Viewer.AddVariableBlock(self, x, y, scaling, var_class, var_name, var_type)

#-------------------------------------------------------------------------------
#                          Adding element functions
#-------------------------------------------------------------------------------

    def AddLadderRung(self):
        dialog = LDElementDialog(self.ParentWindow, self.Controler, "coil")
        dialog.SetPreviewFont(self.GetFont())
        varlist = []
        vars = self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug)
        if vars:
            for var in vars:
                if var["Class"] != "Input" and var["Type"] == "BOOL":
                    varlist.append(var["Name"])
        returntype = self.Controler.GetEditedElementInterfaceReturnType(self.TagName, self.Debug)
        if returntype == "BOOL":
            varlist.append(self.Controler.GetEditedElementName(self.TagName))
        dialog.SetVariables(varlist)
        dialog.SetValues({"name":"","type":COIL_NORMAL})
        if dialog.ShowModal() == wx.ID_OK:
            values = dialog.GetValues()
            startx, starty = LD_OFFSET[0], 0
            if len(self.Rungs) > 0:
                bbox = self.Rungs[-1].GetBoundingBox()
                starty = bbox.y + bbox.height
            starty += LD_OFFSET[1]
            rung = Graphic_Group(self)
            
            # Create comment
            id = self.GetNewId()
            comment = Comment(self, _("Comment"), id)
            comment.SetPosition(startx, starty)
            comment.SetSize(LD_COMMENT_DEFAULTSIZE[0], LD_COMMENT_DEFAULTSIZE[1])
            self.AddComment(comment)
            self.RungComments.append(comment)
            self.Controler.AddEditedElementComment(self.TagName, id)
            self.RefreshCommentModel(comment)
            starty += LD_COMMENT_DEFAULTSIZE[1] + LD_OFFSET[1]
            
            # Create LeftPowerRail
            id = self.GetNewId()
            leftpowerrail = LD_PowerRail(self, LEFTRAIL, id)
            leftpowerrail.SetPosition(startx, starty)
            leftpowerrail_connectors = leftpowerrail.GetConnectors()
            self.AddBlock(leftpowerrail)
            rung.SelectElement(leftpowerrail)
            self.Controler.AddEditedElementPowerRail(self.TagName, id, LEFTRAIL)
            self.RefreshPowerRailModel(leftpowerrail)
            
            # Create Coil
            id = self.GetNewId()
            coil = LD_Coil(self, values["type"], values["name"], id)
            coil.SetPosition(startx, starty + (LD_LINE_SIZE - LD_ELEMENT_SIZE[1]) / 2)
            coil_connectors = coil.GetConnectors()
            self.AddBlock(coil)
            rung.SelectElement(coil)
            self.Controler.AddEditedElementCoil(self.TagName, id)
            
            # Create Wire between LeftPowerRail and Coil
            wire = Wire(self)
            start_connector = coil_connectors["inputs"][0]
            end_connector = leftpowerrail_connectors["outputs"][0]
            start_connector.Connect((wire, 0), False)
            end_connector.Connect((wire, -1), False)
            wire.ConnectStartPoint(None, start_connector)
            wire.ConnectEndPoint(None, end_connector)
            self.AddWire(wire)
            rung.SelectElement(wire)
            
            # Create RightPowerRail
            id = self.GetNewId()
            rightpowerrail = LD_PowerRail(self, RIGHTRAIL, id)
            rightpowerrail.SetPosition(startx, starty)
            rightpowerrail_connectors = rightpowerrail.GetConnectors()
            self.AddBlock(rightpowerrail)
            rung.SelectElement(rightpowerrail)
            self.Controler.AddEditedElementPowerRail(self.TagName, id, RIGHTRAIL)
            
            # Create Wire between LeftPowerRail and Coil
            wire = Wire(self)
            start_connector = rightpowerrail_connectors["inputs"][0]
            end_connector = coil_connectors["outputs"][0]
            start_connector.Connect((wire, 0), False)
            end_connector.Connect((wire, -1), False)
            wire.ConnectStartPoint(None, start_connector)
            wire.ConnectEndPoint(None, end_connector)
            self.AddWire(wire)
            rung.SelectElement(wire)
            self.RefreshPosition(coil)
            self.Rungs.append(rung)
            self.RefreshBuffer()
            self.RefreshScrollBars()
            self.RefreshVisibleElements()
            self.Refresh(False)

    def AddLadderContact(self):
        wires = []
        if self.IsWire(self.SelectedElement):
            left_element = self.SelectedElement.EndConnected
            if not isinstance(left_element.GetParentBlock(), LD_Coil):
                wires.append(self.SelectedElement)
        elif self.SelectedElement and isinstance(self.SelectedElement,Graphic_Group):
            if False not in [self.IsWire(element) for element in self.SelectedElement.GetElements()]:
                for element in self.SelectedElement.GetElements():
                    wires.append(element)
        if len(wires) > 0:
            dialog = LDElementDialog(self.ParentWindow, self.Controler, "contact")
            dialog.SetPreviewFont(self.GetFont())
            varlist = []
            vars = self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug)
            if vars:
                for var in vars:
                    if var["Class"] != "Output" and var["Type"] == "BOOL":
                        varlist.append(var["Name"])
            dialog.SetVariables(varlist)
            dialog.SetValues({"name":"","type":CONTACT_NORMAL})
            if dialog.ShowModal() == wx.ID_OK:
                values = dialog.GetValues()
                points = wires[0].GetSelectedSegmentPoints()
                id = self.GetNewId()
                contact = LD_Contact(self, values["type"], values["name"], id)
                contact.SetPosition(0, points[0].y - (LD_ELEMENT_SIZE[1] + 1) / 2)
                self.AddBlock(contact)
                self.Controler.AddEditedElementContact(self.TagName, id)
                rungindex = self.FindRung(wires[0])
                rung = self.Rungs[rungindex]
                old_bbox = rung.GetBoundingBox()
                rung.SelectElement(contact)
                connectors = contact.GetConnectors()
                left_elements = []
                right_elements = []
                left_index = []
                right_index = []
                for wire in wires:
                    if wire.EndConnected not in left_elements:
                        left_elements.append(wire.EndConnected)
                        left_index.append(wire.EndConnected.GetWireIndex(wire))
                    else:
                        idx = left_elements.index(wire.EndConnected)
                        left_index[idx] = min(left_index[idx], wire.EndConnected.GetWireIndex(wire))
                    if wire.StartConnected not in right_elements:
                        right_elements.append(wire.StartConnected)
                        right_index.append(wire.StartConnected.GetWireIndex(wire))
                    else:
                        idx = right_elements.index(wire.StartConnected)
                        right_index[idx] = min(right_index[idx], wire.StartConnected.GetWireIndex(wire))
                    wire.SetSelectedSegment(None)
                    wire.Clean()
                    rung.SelectElement(wire)
                    self.RemoveWire(wire)
                wires = []
                right_wires = []
                for i, left_element in enumerate(left_elements):
                    wire = Wire(self)
                    wires.append(wire)
                    connectors["inputs"][0].Connect((wire, 0), False)
                    left_element.InsertConnect(left_index[i], (wire, -1), False)
                    wire.ConnectStartPoint(None, connectors["inputs"][0])
                    wire.ConnectEndPoint(None, left_element)
                for i, right_element in enumerate(right_elements):
                    wire = Wire(self)
                    wires.append(wire)
                    right_wires.append(wire)
                    right_element.InsertConnect(right_index[i], (wire, 0), False)
                    connectors["outputs"][0].Connect((wire, -1), False)
                    wire.ConnectStartPoint(None, right_element)
                    wire.ConnectEndPoint(None, connectors["outputs"][0])
                right_wires.reverse()
                for wire in wires:
                    self.AddWire(wire)
                    rung.SelectElement(wire)
                self.RefreshPosition(contact)
                if len(right_wires) > 1:
                    group = Graphic_Group(self)
                    group.SetSelected(False)
                    for wire in right_wires:
                        wire.SetSelectedSegment(-1)
                        group.SelectElement(wire)
                    self.SelectedElement = group
                else:
                    right_wires[0].SetSelectedSegment(-1)
                    self.SelectedElement = right_wires[0]
                rung.RefreshBoundingBox()
                new_bbox = rung.GetBoundingBox()
                self.RefreshRungs(new_bbox.height - old_bbox.height, rungindex + 1)
                self.RefreshBuffer()
                self.RefreshScrollBars()
                self.RefreshVisibleElements()
                self.Refresh(False)
        else:
            message = wx.MessageDialog(self, _("You must select the wire where a contact should be added!"), _("Error"), wx.OK|wx.ICON_ERROR)
            message.ShowModal()
            message.Destroy()

    def AddLadderBranch(self):
        blocks = []
        if self.IsBlock(self.SelectedElement):
            blocks = [self.SelectedElement]
        elif isinstance(self.SelectedElement, Graphic_Group):
            elements = self.SelectedElement.GetElements()
            for element in elements:
                blocks.append(element)
        if len(blocks) > 0:
            blocks_infos = []
            left_elements = []
            left_index = []
            right_elements = []
            right_index = []
            for block in blocks:
                connectors = block.GetConnectors()
                block_infos = {"lefts":[],"rights":[]}
                block_infos.update(connectors)
                for connector in block_infos["inputs"]:
                    for wire, handle in connector.GetWires():
                        found = False
                        for infos in blocks_infos:
                            if wire.EndConnected in infos["outputs"]:
                                for left_element in infos["lefts"]:
                                    if left_element not in block_infos["lefts"]:
                                        block_infos["lefts"].append(left_element)
                                found = True
                        if not found and wire.EndConnected not in block_infos["lefts"]:
                            block_infos["lefts"].append(wire.EndConnected)
                            if wire.EndConnected not in left_elements:
                                left_elements.append(wire.EndConnected)
                                left_index.append(wire.EndConnected.GetWireIndex(wire))
                            else:
                                index = left_elements.index(wire.EndConnected)
                                left_index[index] = max(left_index[index], wire.EndConnected.GetWireIndex(wire))
                for connector in block_infos["outputs"]:
                    for wire, handle in connector.GetWires():
                        found = False
                        for infos in blocks_infos:
                            if wire.StartConnected in infos["inputs"]:
                                for right_element in infos["rights"]:
                                    if right_element not in block_infos["rights"]:
                                        block_infos["rights"].append(right_element)
                                found = True
                        if not found and wire.StartConnected not in block_infos["rights"]:
                            block_infos["rights"].append(wire.StartConnected)
                            if wire.StartConnected not in right_elements:
                                right_elements.append(wire.StartConnected)
                                right_index.append(wire.StartConnected.GetWireIndex(wire))
                            else:
                                index = right_elements.index(wire.StartConnected)
                                right_index[index] = max(right_index[index], wire.StartConnected.GetWireIndex(wire))
                for connector in block_infos["inputs"]:
                    for infos in blocks_infos:
                        if connector in infos["rights"]:
                            infos["rights"].remove(connector)
                            if connector in right_elements:
                                index = right_elements.index(connector)
                                right_elements.pop(index)
                                right_index.pop(index)
                            for right_element in block_infos["rights"]:
                                if right_element not in infos["rights"]:
                                    infos["rights"].append(right_element)
                for connector in block_infos["outputs"]:
                    for infos in blocks_infos:
                        if connector in infos["lefts"]:
                            infos["lefts"].remove(connector)
                            if connector in left_elements:
                                index = left_elements.index(connector)
                                left_elements.pop(index)
                                left_index.pop(index)
                            for left_element in block_infos["lefts"]:
                                if left_element not in infos["lefts"]:
                                    infos["lefts"].append(left_element)
                blocks_infos.append(block_infos)
            for infos in blocks_infos:
                left_elements = [element for element in infos["lefts"]]
                for left_element in left_elements:
                    if isinstance(left_element.GetParentBlock(), LD_PowerRail):
                        infos["lefts"].remove(left_element)
                        if "LD_PowerRail" not in infos["lefts"]:
                            infos["lefts"].append("LD_PowerRail")
                right_elements = [element for element in infos["rights"]]
                for right_element in right_elements:
                    if isinstance(right_element.GetParentBlock(), LD_PowerRail):
                        infos["rights"].remove(right_element)
                        if "LD_PowerRail" not in infos["rights"]:
                            infos["rights"].append("LD_PowerRail")
                infos["lefts"].sort()
                infos["rights"].sort()
            lefts = blocks_infos[0]["lefts"]
            rights = blocks_infos[0]["rights"]
            good = True
            for infos in blocks_infos[1:]:
                good &= infos["lefts"] == lefts
                good &= infos["rights"] == rights
            if good:
                rungindex = self.FindRung(blocks[0])
                rung = self.Rungs[rungindex]
                old_bbox = rung.GetBoundingBox()
                left_powerrail = True
                right_powerrail = True
                for element in left_elements:
                    left_powerrail &= isinstance(element.GetParentBlock(), LD_PowerRail)
                for element in right_elements:
                    right_powerrail &= isinstance(element.GetParentBlock(), LD_PowerRail)
                if not left_powerrail or not right_powerrail:
                    wires = []
                    if left_powerrail:
                        powerrail = left_elements[0].GetParentBlock()
                        index = 0
                        for left_element in left_elements: 
                            index = max(index, powerrail.GetConnectorIndex(left_element))
                        powerrail.InsertConnector(index + 1)
                        powerrail.RefreshModel()
                        connectors = powerrail.GetConnectors()
                        right_elements.reverse()
                        for i, right_element in enumerate(right_elements):
                            new_wire = Wire(self)
                            wires.append(new_wire)
                            right_element.InsertConnect(right_index[i] + 1, (new_wire, 0), False)
                            connectors["outputs"][index + 1].Connect((new_wire, -1), False)
                            new_wire.ConnectStartPoint(None, right_element)
                            new_wire.ConnectEndPoint(None, connectors["outputs"][index + 1])
                        right_elements.reverse()
                    elif right_powerrail:
                        dialog = LDElementDialog(self.ParentWindow, self.Controleur, "coil")
                        dialog.SetPreviewFont(self.GetFont())
                        varlist = []
                        vars = self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug)
                        if vars:
                            for var in vars:
                                if var["Class"] != "Input" and var["Type"] == "BOOL":
                                    varlist.append(var["Name"])
                        returntype = self.Controler.GetEditedElementInterfaceReturnType(self.TagName, self.Debug)
                        if returntype == "BOOL":
                            varlist.append(self.Controler.GetEditedElementName(self.TagName))
                        dialog.SetVariables(varlist)
                        dialog.SetValues({"name":"","type":COIL_NORMAL})
                        if dialog.ShowModal() == wx.ID_OK:
                            values = dialog.GetValues()
                            powerrail = right_elements[0].GetParentBlock()
                            index = 0
                            for right_element in right_elements: 
                                index = max(index, powerrail.GetConnectorIndex(right_element))
                            powerrail.InsertConnector(index + 1)
                            powerrail.RefreshModel()
                            connectors = powerrail.GetConnectors()
                            
                            # Create Coil
                            id = self.GetNewId()
                            coil = LD_Coil(self, values["type"], values["name"], id)
                            pos = blocks[0].GetPosition()
                            coil.SetPosition(pos[0], pos[1] + LD_LINE_SIZE)
                            self.AddBlock(coil)
                            rung.SelectElement(coil)
                            self.Controler.AddEditedElementCoil(self.TagName, id)
                            coil_connectors = coil.GetConnectors()
                            
                            # Create Wire between LeftPowerRail and Coil
                            wire = Wire(self)
                            connectors["inputs"][index + 1].Connect((wire, 0), False)
                            coil_connectors["outputs"][0].Connect((wire, -1), False)
                            wire.ConnectStartPoint(None, connectors["inputs"][index + 1])
                            wire.ConnectEndPoint(None, coil_connectors["outputs"][0])
                            self.AddWire(wire)
                            rung.SelectElement(wire)
                            left_elements.reverse()
                            
                            for i, left_element in enumerate(left_elements):
                                # Create Wire between LeftPowerRail and Coil
                                new_wire = Wire(self)
                                wires.append(new_wire)
                                coil_connectors["inputs"][0].Connect((new_wire, 0), False)
                                left_element.InsertConnect(left_index[i] + 1, (new_wire, -1), False)
                                new_wire.ConnectStartPoint(None, coil_connectors["inputs"][0])
                                new_wire.ConnectEndPoint(None, left_element)
                            
                            self.RefreshPosition(coil)
                    else:
                        left_elements.reverse()
                        right_elements.reverse()
                        for i, left_element in enumerate(left_elements):
                            for j, right_element in enumerate(right_elements):
                                exist = False
                                for wire, handle in right_element.GetWires():
                                    exist |= wire.EndConnected == left_element
                                if not exist:
                                    new_wire = Wire(self)
                                    wires.append(new_wire)
                                    right_element.InsertConnect(right_index[j] + 1, (new_wire, 0), False)
                                    left_element.InsertConnect(left_index[i] + 1, (new_wire, -1), False)
                                    new_wire.ConnectStartPoint(None, right_element)
                                    new_wire.ConnectEndPoint(None, left_element)
                    wires.reverse()
                    for wire in wires:
                        self.AddWire(wire)
                        rung.SelectElement(wire)
                    right_elements.reverse()
                for block in blocks:
                    self.RefreshPosition(block)
                for right_element in right_elements:
                    self.RefreshPosition(right_element.GetParentBlock())
                self.SelectedElement.RefreshBoundingBox()
                rung.RefreshBoundingBox()
                new_bbox = rung.GetBoundingBox()
                self.RefreshRungs(new_bbox.height - old_bbox.height, rungindex + 1)
                self.RefreshBuffer()
                self.RefreshScrollBars()
                self.RefreshVisibleElements()
                self.Refresh(False)
            else:
                message = wx.MessageDialog(self, _("The group of block must be coherent!"), _("Error"), wx.OK|wx.ICON_ERROR)
                message.ShowModal()
                message.Destroy()
        else:
            message = wx.MessageDialog(self, _("You must select the block or group of blocks around which a branch should be added!"), _("Error"), wx.OK|wx.ICON_ERROR)
            message.ShowModal()
            message.Destroy()

    def AddLadderBlock(self):
        message = wx.MessageDialog(self, _("This option isn't available yet!"), _("Warning"), wx.OK|wx.ICON_EXCLAMATION)
        message.ShowModal()
        message.Destroy()

#-------------------------------------------------------------------------------
#                          Delete element functions
#-------------------------------------------------------------------------------

    def DeleteContact(self, contact):
        if self.GetDrawingMode() == FREEDRAWING_MODE:
            Viewer.DeleteContact(self, contact)
        else:
            rungindex = self.FindRung(contact)
            rung = self.Rungs[rungindex]
            old_bbox = rung.GetBoundingBox()
            connectors = contact.GetConnectors()
            input_wires = [wire for wire, handle in connectors["inputs"][0].GetWires()]
            output_wires = [wire for wire, handle in connectors["outputs"][0].GetWires()]
            left_elements = [(wire.EndConnected, wire.EndConnected.GetWireIndex(wire)) for wire in input_wires]
            right_elements = [(wire.StartConnected, wire.StartConnected.GetWireIndex(wire)) for wire in output_wires]
            for wire in input_wires:
                wire.Clean()
                rung.SelectElement(wire)
                self.RemoveWire(wire)
            for wire in output_wires:
                wire.Clean()
                rung.SelectElement(wire)
                self.RemoveWire(wire)
            rung.SelectElement(contact)
            contact.Clean()
            left_elements.reverse()
            right_elements.reverse()
            powerrail = len(left_elements) == 1 and isinstance(left_elements[0][0].GetParentBlock(), LD_PowerRail)
            for left_element, left_index in left_elements:
                for right_element, right_index in right_elements:
                    wire_removed = []
                    for wire, handle in right_element.GetWires():
                        if wire.EndConnected == left_element:
                            wire_removed.append(wire)
                        elif isinstance(wire.EndConnected.GetParentBlock(), LD_PowerRail) and powerrail:
                            left_powerrail = wire.EndConnected.GetParentBlock()
                            index = left_powerrail.GetConnectorIndex(wire.EndConnected)
                            left_powerrail.DeleteConnector(index)
                            wire_removed.append(wire)
                    for wire in wire_removed:
                        wire.Clean()
                        self.RemoveWire(wire)
                        rung.SelectElement(wire)
            wires = []
            for left_element, left_index in left_elements:
                for right_element, right_index in right_elements:
                    wire = Wire(self)
                    wires.append(wire)
                    right_element.InsertConnect(right_index, (wire, 0), False)
                    left_element.InsertConnect(left_index, (wire, -1), False)
                    wire.ConnectStartPoint(None, right_element)
                    wire.ConnectEndPoint(None, left_element)
            wires.reverse()
            for wire in wires:
                self.AddWire(wire)
                rung.SelectElement(wire)
            right_elements.reverse()
            for right_element, right_index in right_elements:
                self.RefreshPosition(right_element.GetParentBlock())
            self.RemoveBlock(contact)
            self.Controler.RemoveEditedElementInstance(self.TagName, contact.GetId())
            rung.RefreshBoundingBox()
            new_bbox = rung.GetBoundingBox()
            self.RefreshRungs(new_bbox.height - old_bbox.height, rungindex + 1)
            self.SelectedElement = None

    def RecursiveDeletion(self, element, rung):
        connectors = element.GetConnectors()
        input_wires = [wire for wire, handle in connectors["inputs"][0].GetWires()]
        left_elements = [wire.EndConnected for wire in input_wires]
        rung.SelectElement(element)
        element.Clean()
        for wire in input_wires:
            wire.Clean()
            self.RemoveWire(wire)
            rung.SelectElement(wire)
        self.RemoveBlock(element)
        self.Controler.RemoveEditedElementInstance(self.TagName, element.GetId())
        for left_element in left_elements:
            block = left_element.GetParentBlock()
            if len(left_element.GetWires()) == 0:
                self.RecursiveDeletion(block, rung)
            else:
                self.RefreshPosition(block)

    def DeleteCoil(self, coil):
        if self.GetDrawingMode() == FREEDRAWING_MODE:
            Viewer.DeleteContact(self, coil)
        else:
            rungindex = self.FindRung(coil)
            rung = self.Rungs[rungindex]
            old_bbox = rung.GetBoundingBox()
            nbcoils = 0
            for element in rung.GetElements():
                if isinstance(element, LD_Coil):
                    nbcoils += 1
            if nbcoils > 1:
                connectors = coil.GetConnectors()
                output_wires = [wire for wire, handle in connectors["outputs"][0].GetWires()]
                right_elements = [wire.StartConnected for wire in output_wires]
                for wire in output_wires:
                    wire.Clean()
                    self.Wires.remove(wire)
                    self.Elements.remove(wire)
                    rung.SelectElement(wire)
                for right_element in right_elements:
                    right_block = right_element.GetParentBlock()
                    if isinstance(right_block, LD_PowerRail):
                        if len(right_element.GetWires()) == 0:
                            index = right_block.GetConnectorIndex(right_element)
                            right_block.DeleteConnector(index)
                            powerrail_connectors = right_block.GetConnectors()
                            for connector in powerrail_connectors["inputs"]:
                                for wire, handle in connector.GetWires():
                                    block = wire.EndConnected.GetParentBlock()
                                    endpoint = wire.EndConnected.GetPosition(False)
                                    startpoint = connector.GetPosition(False)
                                    block.Move(0, startpoint.y - endpoint.y)
                                    self.RefreshPosition(block)
                self.RecursiveDeletion(coil, rung)
            else:
                for element in rung.GetElements():
                    if self.IsWire(element):
                        element.Clean()
                        self.RemoveWire(element)
                for element in rung.GetElements():
                    if self.IsBlock(element):
                        self.Controler.RemoveEditedElementInstance(self.TagName, element.GetId())
                        self.RemoveBlock(element)
                self.Controler.RemoveEditedElementInstance(self.TagName, self.Comments[rungindex].GetId())
                self.RemoveComment(self.RungComments[rungindex])
                self.RungComments.pop(rungindex)
                self.Rungs.pop(rungindex)
                if rungindex < len(self.Rungs):
                    next_bbox = self.Rungs[rungindex].GetBoundingBox()
                    self.RefreshRungs(old_bbox.y - next_bbox.y, rungindex)
            self.SelectedElement = None

    def DeleteWire(self, wire):
        if self.GetDrawingMode() == FREEDRAWING_MODE:
            Viewer.DeleteWire(self, wire)
        else:
            wires = []
            left_elements = []
            right_elements = []
            if self.IsWire(wire):
                wires = [wire]
            elif isinstance(wire, Graphic_Group):
                for element in wire.GetElements():
                    if self.IsWire(element):
                        wires.append(element)
                    else:
                        wires = []
                        break
            if len(wires) > 0:
                rungindex = self.FindRung(wires[0])
                rung = self.Rungs[rungindex]
                old_bbox = rung.GetBoundingBox()
                for wire in wires:
                    connections = wire.GetSelectedSegmentConnections()
                    left_block = wire.EndConnected.GetParentBlock()
                    if wire.EndConnected not in left_elements:
                        left_elements.append(wire.EndConnected)
                    if wire.StartConnected not in right_elements:
                        right_elements.append(wire.StartConnected)
                    if connections == (False, False) or connections == (False, True) and isinstance(left_block, LD_PowerRail):
                        wire.Clean()
                        self.RemoveWire(wire)
                        rung.SelectElement(wire)
                for left_element in left_elements:
                    left_block = left_element.GetParentBlock()
                    if isinstance(left_block, LD_PowerRail):
                        if len(left_element.GetWires()) == 0:
                            index = left_block.GetConnectorIndex(left_element)
                            left_block.DeleteConnector(index)
                    else:
                        connectors = left_block.GetConnectors()
                        for connector in connectors["outputs"]:
                            for wire, handle in connector.GetWires():
                                self.RefreshPosition(wire.StartConnected.GetParentBlock())
                for right_element in right_elements:
                    self.RefreshPosition(right_element.GetParentBlock())
                rung.RefreshBoundingBox()
                new_bbox = rung.GetBoundingBox()
                self.RefreshRungs(new_bbox.height - old_bbox.height, rungindex + 1)
                self.SelectedElement = None

#-------------------------------------------------------------------------------
#                        Refresh element position functions
#-------------------------------------------------------------------------------

    def RefreshPosition(self, element, recursive=True):
        # If element is LeftPowerRail, no need to update position
        if isinstance(element, LD_PowerRail) and element.GetType() == LEFTRAIL:
            element.RefreshModel()
            return
        
        # Extract max position of the elements connected to input
        connectors = element.GetConnectors()
        position = element.GetPosition()
        maxx = 0
        onlyone = []
        for connector in connectors["inputs"]:
            onlyone.append(len(connector.GetWires()) == 1)
            for wire, handle in connector.GetWires():
                onlyone[-1] &= len(wire.EndConnected.GetWires()) == 1
                leftblock = wire.EndConnected.GetParentBlock()
                pos = leftblock.GetPosition()
                size = leftblock.GetSize()
                maxx = max(maxx, pos[0] + size[0])
        
        # Refresh position of element
        if isinstance(element, LD_Coil):
            interval = LD_WIRECOIL_SIZE
        else:
            interval = LD_WIRE_SIZE
        if False in onlyone:
            interval += LD_WIRE_SIZE
        movex = maxx + interval - position[0]
        element.Move(movex, 0)
        position = element.GetPosition()
        
        # Extract blocks connected to inputs
        blocks = []
        for i, connector in enumerate(connectors["inputs"]):
            for j, (wire, handle) in enumerate(connector.GetWires()):
                blocks.append(wire.EndConnected.GetParentBlock())
        
        for i, connector in enumerate(connectors["inputs"]):
            startpoint = connector.GetPosition(False)
            previous_blocks = []
            block_list = []
            start_offset = 0
            if not onlyone[i]:
                middlepoint = maxx + LD_WIRE_SIZE
            for j, (wire, handle) in enumerate(connector.GetWires()):
                block = wire.EndConnected.GetParentBlock()
                if isinstance(element, LD_PowerRail):
                    pos = block.GetPosition()
                    size = leftblock.GetSize()
                    movex = position[0] - LD_WIRE_SIZE - size[0] - pos[0]
                    block.Move(movex, 0)
                endpoint = wire.EndConnected.GetPosition(False)
                if j == 0:
                    if not onlyone[i] and wire.EndConnected.GetWireIndex(wire) > 0:
                        start_offset = endpoint.y - startpoint.y
                    offset = start_offset
                else:
                    offset = start_offset + LD_LINE_SIZE * CalcBranchSize(previous_blocks, blocks)
                if block in block_list:
                    wires = wire.EndConnected.GetWires()
                    endmiddlepoint = wires[0][0].StartConnected.GetPosition(False)[0] - LD_WIRE_SIZE
                    points = [startpoint, wx.Point(middlepoint, startpoint.y),
                              wx.Point(middlepoint, startpoint.y + offset),
                              wx.Point(endmiddlepoint, startpoint.y + offset),
                              wx.Point(endmiddlepoint, endpoint.y), endpoint]
                else:
                    if startpoint.y + offset != endpoint.y:
                        if isinstance(element, LD_PowerRail):
                            element.MoveConnector(connector, startpoint.y - endpoint.y)
                        elif isinstance(block, LD_PowerRail):
                            block.MoveConnector(wire.EndConnected, startpoint.y - endpoint.y)
                        else:
                            block.Move(0, startpoint.y + offset - endpoint.y)
                            self.RefreshPosition(block, False)
                        endpoint = wire.EndConnected.GetPosition(False)
                    if not onlyone[i]:
                        points = [startpoint, wx.Point(middlepoint, startpoint.y),
                                  wx.Point(middlepoint, endpoint.y), endpoint]
                    else:
                        points = [startpoint, endpoint]
                wire.SetPoints(points, False)
                previous_blocks.append(block)
                blocks.remove(block)
                ExtractNextBlocks(block, block_list)
        
        element.RefreshModel(False)
        if recursive:
            for connector in connectors["outputs"]:
                for wire, handle in connector.GetWires():
                    self.RefreshPosition(wire.StartConnected.GetParentBlock())
    
    def RefreshRungs(self, movey, fromidx):
        if movey != 0:
            for i in xrange(fromidx, len(self.Rungs)):
                self.RungComments[i].Move(0, movey)
                self.RungComments[i].RefreshModel()
                self.Rungs[i].Move(0, movey)
                for element in self.Rungs[i].GetElements():
                    if self.IsBlock(element):
                        self.RefreshPosition(element)

#-------------------------------------------------------------------------------
#                          Edit element content functions
#-------------------------------------------------------------------------------

    def EditPowerRailContent(self, powerrail):
        if self.GetDrawingMode() == FREEDRAWING_MODE:
            Viewer.EditPowerRailContent(self, powerrail)