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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor

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#based on the plcopen standard.

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#

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#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

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#

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#See COPYING file for copyrights details.

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#

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#This library is free software; you can redistribute it and/or

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#modify it under the terms of the GNU General Public

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#License as published by the Free Software Foundation; either

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#version 2.1 of the License, or (at your option) any later version.

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#

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#This library is distributed in the hope that it will be useful,

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#but WITHOUT ANY WARRANTY; without even the implied warranty of

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#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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#General Public License for more details.

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#

    21

#You should have received a copy of the GNU General Public

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#License along with this library; if not, write to the Free Software

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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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    25

import wx

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import os, sys, platform, time, traceback, getopt

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beremiz_dir = os.path.dirname(os.path.realpath(__file__))

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__version__ = "$Revision: 1.130 $"

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if __name__ == '__main__':

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    # Usage message displayed when help request or when error detected in

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    # command line

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    def usage():

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        print "\nUsage of PLCOpenEditor.py :"

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        print "\n   %s [Filepath]\n"%sys.argv[0]

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    # Parse options given to PLCOpenEditor in command line

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    try:

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        opts, args = getopt.getopt(sys.argv[1:], "h", ["help"])

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    except getopt.GetoptError:

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        # print help information and exit:

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        usage()

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        sys.exit(2)

    46

    47

    # Extract if help has been requested

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    for o, a in opts:

    49

        if o in ("-h", "--help"):

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            usage()

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            sys.exit()

    52

    53

    # Extract the optional filename to open

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    fileOpen = None

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    if len(args) > 1:

    56

        usage()

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        sys.exit()

    58

    elif len(args) == 1:

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        fileOpen = args[0]

    60

    61

    # Create wxApp (Need to create App before internationalization because of

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    # Windows)

    63

    if wx.VERSION >= (3, 0, 0):

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        app = wx.App()

    65

    else:

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        app = wx.PySimpleApp()

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    68

    69

    from util.misc import InstallLocalRessources

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    InstallLocalRessources(beremiz_dir)

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    72

from docutil import *

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from IDEFrame import IDEFrame, AppendMenu

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from IDEFrame import TITLE, EDITORTOOLBAR, FILEMENU, EDITMENU, DISPLAYMENU, PROJECTTREE, POUINSTANCEVARIABLESPANEL, LIBRARYTREE, PAGETITLES

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from IDEFrame import EncodeFileSystemPath, DecodeFileSystemPath

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from editors.Viewer import Viewer

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from PLCControler import PLCControler

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from dialogs import ProjectDialog

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    80

#-------------------------------------------------------------------------------

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#                            PLCOpenEditor Main Class

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#-------------------------------------------------------------------------------

    83

    84

# Define PLCOpenEditor FileMenu extra items id

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[ID_PLCOPENEDITORFILEMENUGENERATE,

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] = [wx.NewId() for _init_coll_FileMenu_Items in range(1)]

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    88

class PLCOpenEditor(IDEFrame):

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    90

    # Compatibility function for wx versions < 2.6

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    if wx.VERSION < (2, 6, 0):

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        def Bind(self, event, function, id = None):

    93

            if id is not None:

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                event(self, id, function)

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            else:

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                event(self, function)

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    98

    def _init_coll_FileMenu_Items(self, parent):

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        AppendMenu(parent, help='', id=wx.ID_NEW,

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              kind=wx.ITEM_NORMAL, text=_(u'New') +'\tCTRL+N')

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        AppendMenu(parent, help='', id=wx.ID_OPEN,

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              kind=wx.ITEM_NORMAL, text=_(u'Open') + '\tCTRL+O')

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        AppendMenu(parent, help='', id=wx.ID_CLOSE,

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              kind=wx.ITEM_NORMAL, text=_(u'Close Tab') + '\tCTRL+W')

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        AppendMenu(parent, help='', id=wx.ID_CLOSE_ALL,

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              kind=wx.ITEM_NORMAL, text=_(u'Close Project') + '\tCTRL+SHIFT+W')

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=wx.ID_SAVE,

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              kind=wx.ITEM_NORMAL, text=_(u'Save') + '\tCTRL+S')

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        AppendMenu(parent, help='', id=wx.ID_SAVEAS,

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              kind=wx.ITEM_NORMAL, text=_(u'Save As...') + '\tCTRL+SHIFT+S')

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        AppendMenu(parent, help='', id=ID_PLCOPENEDITORFILEMENUGENERATE,

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              kind=wx.ITEM_NORMAL, text=_(u'Generate Program') + '\tCTRL+G')

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=wx.ID_PAGE_SETUP,

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              kind=wx.ITEM_NORMAL, text=_(u'Page Setup') + '\tCTRL+ALT+P')

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        AppendMenu(parent, help='', id=wx.ID_PREVIEW,

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              kind=wx.ITEM_NORMAL, text=_(u'Preview') + '\tCTRL+SHIFT+P')

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        AppendMenu(parent, help='', id=wx.ID_PRINT,

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              kind=wx.ITEM_NORMAL, text=_(u'Print') + '\tCTRL+P')

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=wx.ID_PROPERTIES,

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              kind=wx.ITEM_NORMAL, text=_(u'&Properties'))

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=wx.ID_EXIT,

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              kind=wx.ITEM_NORMAL, text=_(u'Quit') + '\tCTRL+Q')

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   128

        self.Bind(wx.EVT_MENU, self.OnNewProjectMenu, id=wx.ID_NEW)

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        self.Bind(wx.EVT_MENU, self.OnOpenProjectMenu, id=wx.ID_OPEN)

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        self.Bind(wx.EVT_MENU, self.OnCloseTabMenu, id=wx.ID_CLOSE)

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        self.Bind(wx.EVT_MENU, self.OnCloseProjectMenu, id=wx.ID_CLOSE_ALL)

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        self.Bind(wx.EVT_MENU, self.OnSaveProjectMenu, id=wx.ID_SAVE)

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        self.Bind(wx.EVT_MENU, self.OnSaveProjectAsMenu, id=wx.ID_SAVEAS)

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        self.Bind(wx.EVT_MENU, self.OnGenerateProgramMenu,

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              id=ID_PLCOPENEDITORFILEMENUGENERATE)

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        self.Bind(wx.EVT_MENU, self.OnPageSetupMenu, id=wx.ID_PAGE_SETUP)

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        self.Bind(wx.EVT_MENU, self.OnPreviewMenu, id=wx.ID_PREVIEW)

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        self.Bind(wx.EVT_MENU, self.OnPrintMenu, id=wx.ID_PRINT)

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        self.Bind(wx.EVT_MENU, self.OnPropertiesMenu, id=wx.ID_PROPERTIES)

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        self.Bind(wx.EVT_MENU, self.OnQuitMenu, id=wx.ID_EXIT)

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   142

        self.AddToMenuToolBar([(wx.ID_NEW, "new", _(u'New'), None),

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                               (wx.ID_OPEN, "open", _(u'Open'), None),

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                               (wx.ID_SAVE, "save", _(u'Save'), None),

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                               (wx.ID_SAVEAS, "saveas", _(u'Save As...'), None),

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                               (wx.ID_PRINT, "print", _(u'Print'), None)])

   147

   148

    def _init_coll_HelpMenu_Items(self, parent):

   149

        AppendMenu(parent, help='', id=wx.ID_HELP,

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            kind=wx.ITEM_NORMAL, text=_(u'PLCOpenEditor') + '\tF1')

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        #AppendMenu(parent, help='', id=wx.ID_HELP_CONTENTS,

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        #      kind=wx.ITEM_NORMAL, text=u'PLCOpen\tF2')

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        #AppendMenu(parent, help='', id=wx.ID_HELP_CONTEXT,

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        #      kind=wx.ITEM_NORMAL, text=u'IEC 61131-3\tF3')

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        AppendMenu(parent, help='', id=wx.ID_ABOUT,

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            kind=wx.ITEM_NORMAL, text=_(u'About'))

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        self.Bind(wx.EVT_MENU, self.OnPLCOpenEditorMenu, id=wx.ID_HELP)

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        #self.Bind(wx.EVT_MENU, self.OnPLCOpenMenu, id=wx.ID_HELP_CONTENTS)

   159

        self.Bind(wx.EVT_MENU, self.OnAboutMenu, id=wx.ID_ABOUT)

   160

   161

    ## Constructor of the PLCOpenEditor class.

   162

    #  @param parent The parent window.

   163

    #  @param controler The controler been used by PLCOpenEditor (default: None).

   164

    #  @param fileOpen The filepath to open if no controler defined (default: None).

   165

    #  @param debug The filepath to open if no controler defined (default: False).

   166

    def __init__(self, parent, fileOpen = None):

   167

        self.icon = wx.Icon(os.path.join(beremiz_dir, "images", "poe.ico"), wx.BITMAP_TYPE_ICO)

   168

        IDEFrame.__init__(self, parent)

   169

   170

        result = None

   171

   172

        # Open the filepath if defined

   173

        if fileOpen is not None:

   174

            fileOpen = DecodeFileSystemPath(fileOpen, False)

   175

            if os.path.isfile(fileOpen):

   176

                # Create a new controller

   177

                controler = PLCControler()

   178

                result = controler.OpenXMLFile(fileOpen)

   179

                self.Controler = controler

   180

                self.LibraryPanel.SetController(controler)

   181

                self.ProjectTree.Enable(True)

   182

                self.PouInstanceVariablesPanel.SetController(controler)

   183

                self._Refresh(PROJECTTREE, POUINSTANCEVARIABLESPANEL, LIBRARYTREE)

   184

   185

        # Define PLCOpenEditor icon

   186

        self.SetIcon(self.icon)

   187

   188

        self.Bind(wx.EVT_CLOSE, self.OnCloseFrame)

   189

   190

        self._Refresh(TITLE, EDITORTOOLBAR, FILEMENU, EDITMENU, DISPLAYMENU)

   191

   192

        if result is not None:

   193

            self.ShowErrorMessage(

   194

                _("PLC syntax error at line %d:\n%s") % result)

   195

   196

    def OnCloseFrame(self, event):

   197

        if self.Controler is None or self.CheckSaveBeforeClosing(_("Close Application")):

   198

            self.AUIManager.UnInit()

   199

   200

            self.SaveLastState()

   201

   202

            event.Skip()

   203

        else:

   204

            event.Veto()

   205

   206

    def RefreshTitle(self):

   207

        name = _("PLCOpenEditor")

   208

        if self.Controler is not None:

   209

            self.SetTitle("%s - %s"%(name, self.Controler.GetFilename()))

   210

        else:

   211

            self.SetTitle(name)

   212

   213

#-------------------------------------------------------------------------------

   214

#                            File Menu Functions

   215

#-------------------------------------------------------------------------------

   216

   217

    def RefreshFileMenu(self):

   218

        MenuToolBar = self.Panes["MenuToolBar"]

   219

        if self.Controler is not None:

   220

            selected = self.TabsOpened.GetSelection()

   221

            if selected >= 0:

   222

                graphic_viewer = isinstance(self.TabsOpened.GetPage(selected), Viewer)

   223

            else:

   224

                graphic_viewer = False

   225

            if self.TabsOpened.GetPageCount() > 0:

   226

                self.FileMenu.Enable(wx.ID_CLOSE, True)

   227

                if graphic_viewer:

   228

                    self.FileMenu.Enable(wx.ID_PREVIEW, True)

   229

                    self.FileMenu.Enable(wx.ID_PRINT, True)

   230

                    MenuToolBar.EnableTool(wx.ID_PRINT, True)

   231

                else:

   232

                    self.FileMenu.Enable(wx.ID_PREVIEW, False)

   233

                    self.FileMenu.Enable(wx.ID_PRINT, False)

   234

                    MenuToolBar.EnableTool(wx.ID_PRINT, False)

   235

            else:

   236

                self.FileMenu.Enable(wx.ID_CLOSE, False)

   237

                self.FileMenu.Enable(wx.ID_PREVIEW, False)

   238

                self.FileMenu.Enable(wx.ID_PRINT, False)

   239

                MenuToolBar.EnableTool(wx.ID_PRINT, False)

   240

            self.FileMenu.Enable(wx.ID_PAGE_SETUP, True)

   241

            project_modified = not self.Controler.ProjectIsSaved()

   242

            self.FileMenu.Enable(wx.ID_SAVE, project_modified)

   243

            MenuToolBar.EnableTool(wx.ID_SAVE, project_modified)

   244

            self.FileMenu.Enable(wx.ID_PROPERTIES, True)

   245

            self.FileMenu.Enable(wx.ID_CLOSE_ALL, True)

   246

            self.FileMenu.Enable(wx.ID_SAVEAS, True)

   247

            MenuToolBar.EnableTool(wx.ID_SAVEAS, True)

   248

            self.FileMenu.Enable(ID_PLCOPENEDITORFILEMENUGENERATE, True)

   249

        else:

   250

            self.FileMenu.Enable(wx.ID_CLOSE, False)

   251

            self.FileMenu.Enable(wx.ID_PAGE_SETUP, False)

   252

            self.FileMenu.Enable(wx.ID_PREVIEW, False)

   253

            self.FileMenu.Enable(wx.ID_PRINT, False)

   254

            MenuToolBar.EnableTool(wx.ID_PRINT, False)

   255

            self.FileMenu.Enable(wx.ID_SAVE, False)

   256

            MenuToolBar.EnableTool(wx.ID_SAVE, False)

   257

            self.FileMenu.Enable(wx.ID_PROPERTIES, False)

   258

            self.FileMenu.Enable(wx.ID_CLOSE_ALL, False)

   259

            self.FileMenu.Enable(wx.ID_SAVEAS, False)

   260

            MenuToolBar.EnableTool(wx.ID_SAVEAS, False)

   261

            self.FileMenu.Enable(ID_PLCOPENEDITORFILEMENUGENERATE, False)

   262

   263

    def OnNewProjectMenu(self, event):

   264

        if self.Controler is not None and not self.CheckSaveBeforeClosing():

   265

            return

   266

        dialog = ProjectDialog(self)

   267

        if dialog.ShowModal() == wx.ID_OK:

   268

            properties = dialog.GetValues()

   269

            self.ResetView()

   270

            self.Controler = PLCControler()

   271

            self.Controler.CreateNewProject(properties)

   272

            self.LibraryPanel.SetController(self.Controler)

   273

            self.ProjectTree.Enable(True)

   274

            self._Refresh(TITLE, FILEMENU, EDITMENU, PROJECTTREE, POUINSTANCEVARIABLESPANEL,

   275

                          LIBRARYTREE)

   276

   277

    def OnOpenProjectMenu(self, event):

   278

        if self.Controler is not None and not self.CheckSaveBeforeClosing():

   279

            return

   280

        filepath = ""

   281

        if self.Controler is not None:

   282

            filepath = self.Controler.GetFilePath()

   283

        if filepath != "":

   284

            directory = os.path.dirname(filepath)

   285

        else:

   286

            directory = os.getcwd()

   287

   288

        result = None

   289

   290

        dialog = wx.FileDialog(self, _("Choose a file"), directory, "",  _("PLCOpen files (*.xml)|*.xml|All files|*.*"), wx.OPEN)

   291

        if dialog.ShowModal() == wx.ID_OK:

   292

            filepath = dialog.GetPath()

   293

            if os.path.isfile(filepath):

   294

                self.ResetView()

   295

                controler = PLCControler()

   296

                result = controler.OpenXMLFile(filepath)

   297

                self.Controler = controler

   298

                self.LibraryPanel.SetController(controler)

   299

                self.ProjectTree.Enable(True)

   300

                self.PouInstanceVariablesPanel.SetController(controler)

   301

                self._Refresh(PROJECTTREE, LIBRARYTREE)

   302

            self._Refresh(TITLE, EDITORTOOLBAR, FILEMENU, EDITMENU)

   303

        dialog.Destroy()

   304

   305

        if result is not None:

   306

            self.ShowErrorMessage(

   307

                _("PLC syntax error at line %d:\n%s") % result)

   308

   309

    def OnCloseProjectMenu(self, event):

   310

        if not self.CheckSaveBeforeClosing():

   311

            return

   312

        self.ResetView()

   313

        self._Refresh(TITLE, EDITORTOOLBAR, FILEMENU, EDITMENU)

   314

   315

    def OnSaveProjectMenu(self, event):

   316

        self.SaveProject()

   317

   318

    def OnSaveProjectAsMenu(self, event):

   319

        self.SaveProjectAs()

   320

   321

    def OnGenerateProgramMenu(self, event):

   322

        dialog = wx.FileDialog(self, _("Choose a file"), os.getcwd(), self.Controler.GetProgramFilePath(),  _("ST files (*.st)|*.st|All files|*.*"), wx.SAVE|wx.CHANGE_DIR)

   323

        if dialog.ShowModal() == wx.ID_OK:

   324

            filepath = dialog.GetPath()

   325

            message_text = ""

   326

            header, icon = _("Done"), wx.ICON_INFORMATION

   327

            if os.path.isdir(os.path.dirname(filepath)):

   328

                program, errors, warnings = self.Controler.GenerateProgram(filepath)

   329

                message_text += "".join([_("warning: %s\n") % warning for warning in warnings])

   330

                if len(errors) > 0:

   331

                    message_text += "".join([_("error: %s\n") % error for error in errors])

   332

                    message_text += _("Can't generate program to file %s!")%filepath

   333

                    header, icon = _("Error"), wx.ICON_ERROR

   334

                else:

   335

                    message_text += _("Program was successfully generated!")

   336

            else:

   337

                message_text += _("\"%s\" is not a valid folder!")%os.path.dirname(filepath)

   338

                header, icon = _("Error"), wx.ICON_ERROR

   339

            message = wx.MessageDialog(self, message_text, header, wx.OK|icon)

   340

            message.ShowModal()

   341

            message.Destroy()

   342

        dialog.Destroy()

   343

   344

    def OnPLCOpenEditorMenu(self, event):

   345

        wx.MessageBox(_("No documentation available.\nComing soon."))

   346

   347

    def OnPLCOpenMenu(self, event):

   348

        open_pdf(os.path.join(beremiz_dir, "plcopen", "TC6_XML_V101.pdf"))

   349

   350

    def OnAboutMenu(self, event):

   351

        OpenHtmlFrame(self,_("About PLCOpenEditor"), os.path.join(beremiz_dir, "doc", _("plcopen_about.html")), wx.Size(350, 350))

   352

   353

    def SaveProject(self):

   354

        result = self.Controler.SaveXMLFile()

   355

        if not result:

   356

            self.SaveProjectAs()

   357

        else:

   358

            self._Refresh(TITLE, FILEMENU, PAGETITLES)

   359

   360

    def SaveProjectAs(self):

   361

        filepath = self.Controler.GetFilePath()

   362

        if filepath != "":

   363

            directory, filename = os.path.split(filepath)

   364

        else:

   365

            directory, filename = os.getcwd(), "%(projectName)s.xml"%self.Controler.GetProjectProperties()

   366

        dialog = wx.FileDialog(self, _("Choose a file"), directory, filename,  _("PLCOpen files (*.xml)|*.xml|All files|*.*"), wx.SAVE|wx.OVERWRITE_PROMPT)

   367

        if dialog.ShowModal() == wx.ID_OK:

   368

            filepath = dialog.GetPath()

   369

            if os.path.isdir(os.path.dirname(filepath)):

   370

                result = self.Controler.SaveXMLFile(filepath)

   371

                if not result:

   372

                    self.ShowErrorMessage(_("Can't save project to file %s!")%filepath)

   373

            else:

   374

                self.ShowErrorMessage(_("\"%s\" is not a valid folder!")%os.path.dirname(filepath))

   375

            self._Refresh(TITLE, FILEMENU, PAGETITLES)

   376

        dialog.Destroy()

   377

   378

#-------------------------------------------------------------------------------

   379

#                               Exception Handler

   380

#-------------------------------------------------------------------------------

   381

   382

Max_Traceback_List_Size = 20

   383

   384

def Display_Exception_Dialog(e_type,e_value,e_tb):

   385

    trcbck_lst = []

   386

    for i,line in enumerate(traceback.extract_tb(e_tb)):

   387

        trcbck = " " + str(i+1) + _(". ")

   388

        if line[0].find(os.getcwd()) == -1:

   389

            trcbck += _("file : ") + str(line[0]) + _(",   ")

   390

        else:

   391

            trcbck += _("file : ") + str(line[0][len(os.getcwd()):]) + _(",   ")

   392

        trcbck += _("line : ") + str(line[1]) + _(",   ") + _("function : ") + str(line[2])

   393

        trcbck_lst.append(trcbck)

   394

   395

    # Allow clicking....

   396

    cap = wx.Window_GetCapture()

   397

    if cap:

   398

        cap.ReleaseMouse()

   399

   400

    dlg = wx.SingleChoiceDialog(None,

   401

        _("""

   402

An error has occurred.

   403

   404

Click OK to save an error report.

   405

   406

Please be kind enough to send this file to:

   407

edouard.tisserant@gmail.com

   408

   409

Error:

   410

""") +

   411

        str(e_type) + _(" : ") + str(e_value),

   412

        _("Error"),

   413

        trcbck_lst)

   414

    try:

   415

        res = (dlg.ShowModal() == wx.ID_OK)

   416

    finally:

   417

        dlg.Destroy()

   418

   419

    return res

   420

   421

def Display_Error_Dialog(e_value):

   422

    message = wx.MessageDialog(None, str(e_value), _("Error"), wx.OK|wx.ICON_ERROR)

   423

    message.ShowModal()

   424

    message.Destroy()

   425

   426

def get_last_traceback(tb):

   427

    while tb.tb_next:

   428

        tb = tb.tb_next

   429

    return tb

   430

   431

   432

def format_namespace(d, indent='    '):

   433

    return '\n'.join(['%s%s: %s' % (indent, k, repr(v)[:10000]) for k, v in d.iteritems()])

   434

   435

   436

ignored_exceptions = [] # a problem with a line in a module is only reported once per session

   437

   438

def AddExceptHook(path, app_version='[No version]'):#, ignored_exceptions=[]):

   439

   440

    def handle_exception(e_type, e_value, e_traceback):

   441

        traceback.print_exception(e_type, e_value, e_traceback) # this is very helpful when there's an exception in the rest of this func

   442

        last_tb = get_last_traceback(e_traceback)

   443

        ex = (last_tb.tb_frame.f_code.co_filename, last_tb.tb_frame.f_lineno)

   444

        if str(e_value).startswith("!!!"):

   445

            Display_Error_Dialog(e_value)

   446

        elif ex not in ignored_exceptions:

   447

            result = Display_Exception_Dialog(e_type,e_value,e_traceback)

   448

            if result:

   449

                ignored_exceptions.append(ex)

   450

                info = {

   451

                    'app-title' : wx.GetApp().GetAppName(), # app_title

   452

                    'app-version' : app_version,

   453

                    'wx-version' : wx.VERSION_STRING,

   454

                    'wx-platform' : wx.Platform,

   455

                    'python-version' : platform.python_version(), #sys.version.split()[0],

   456

                    'platform' : platform.platform(),

   457

                    'e-type' : e_type,

   458

                    'e-value' : e_value,

   459

                    'date' : time.ctime(),

   460

                    'cwd' : os.getcwd(),

   461

                    }

   462

                if e_traceback:

   463

                    info['traceback'] = ''.join(traceback.format_tb(e_traceback)) + '%s: %s' % (e_type, e_value)

   464

                    last_tb = get_last_traceback(e_traceback)

   465

                    exception_locals = last_tb.tb_frame.f_locals # the locals at the level of the stack trace where the exception actually occurred

   466

                    info['locals'] = format_namespace(exception_locals)

   467

                    if 'self' in exception_locals:

   468

                        info['self'] = format_namespace(exception_locals['self'].__dict__)

   469

   470

                output = open(path+os.sep+"bug_report_"+info['date'].replace(':','-').replace(' ','_')+".txt",'w')

   471

                lst = info.keys()

   472

                lst.sort()

   473

                for a in lst:

   474

                    output.write(a+":\n"+str(info[a])+"\n\n")

   475

   476

    #sys.excepthook = lambda *args: wx.CallAfter(handle_exception, *args)

   477

    sys.excepthook = handle_exception

   478

   479

if __name__ == '__main__':

   480

    if wx.VERSION < (3, 0, 0):

   481

        wx.InitAllImageHandlers()

   482

   483

    # Install a exception handle for bug reports

   484

    AddExceptHook(os.getcwd(),__version__)

   485

   486

    frame = PLCOpenEditor(None, fileOpen=fileOpen)

   487

   488

    frame.Show()

   489

    app.MainLoop()

   490