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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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#

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#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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import wx

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from plcopen.structures import *

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from PLCControler import ITEM_POU

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from Dialogs import *

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SCROLLBAR_UNIT = 10

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WINDOW_BORDER = 10

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SCROLL_ZONE = 10

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def AppendMenu(parent, help, id, kind, text):

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    if wx.VERSION >= (2, 6, 0):

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        parent.Append(help=help, id=id, kind=kind, text=text)

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    else:

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        parent.Append(helpString=help, id=id, kind=kind, item=text)

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

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#                       Graphic elements Viewer base class

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

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# ID Constants for alignment menu items

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[ID_VIEWERALIGNMENTMENUITEMS0, ID_VIEWERALIGNMENTMENUITEMS1,

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 ID_VIEWERALIGNMENTMENUITEMS2, ID_VIEWERALIGNMENTMENUITEMS4,

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 ID_VIEWERALIGNMENTMENUITEMS5, ID_VIEWERALIGNMENTMENUITEMS6,

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] = [wx.NewId() for _init_coll_AlignmentMenu_Items in range(6)]

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# ID Constants for contextual menu items

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[ID_VIEWERCONTEXTUALMENUITEMS0, ID_VIEWERCONTEXTUALMENUITEMS1,

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 ID_VIEWERCONTEXTUALMENUITEMS2, ID_VIEWERCONTEXTUALMENUITEMS3,

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 ID_VIEWERCONTEXTUALMENUITEMS5, ID_VIEWERCONTEXTUALMENUITEMS6,

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 ID_VIEWERCONTEXTUALMENUITEMS8, ID_VIEWERCONTEXTUALMENUITEMS9,

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 ID_VIEWERCONTEXTUALMENUITEMS11, ID_VIEWERCONTEXTUALMENUITEMS12,

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 ID_VIEWERCONTEXTUALMENUITEMS14, ID_VIEWERCONTEXTUALMENUITEMS16,

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 ID_VIEWERCONTEXTUALMENUITEMS17,

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] = [wx.NewId() for _init_coll_ContextualMenu_Items in range(13)]

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class ViewerDropTarget(wx.TextDropTarget):

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    def __init__(self, parent):

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        wx.TextDropTarget.__init__(self)

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        self.ParentWindow = parent

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    def OnDropText(self, x, y, data):

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        x, y = self.ParentWindow.CalcUnscrolledPosition(x, y)

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        values = eval(data)

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        if values[1] == "program":

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            message = wx.MessageDialog(self.ParentWindow, "Programs can't be used by other POUs!", "Error", wx.OK|wx.ICON_ERROR)

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            message.ShowModal()

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            message.Destroy()

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        elif values[1] in ["function", "functionBlock", "program"]:

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            name, type = self.ParentWindow.Controler.GetEditedElementType(self.ParentWindow.GetTagName())

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            if name == values[0]:

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                message = wx.MessageDialog(self.ParentWindow, "\"%s\" can't use itself!"%name, "Error", wx.OK|wx.ICON_ERROR)

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                message.ShowModal()

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                message.Destroy()

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            elif type == "function" and values[1] != "function":

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                message = wx.MessageDialog(self.ParentWindow, "Function Blocks can't be used by Functions!", "Error", wx.OK|wx.ICON_ERROR)

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                message.ShowModal()

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                message.Destroy()

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            elif self.ParentWindow.Controler.PouIsUsedBy(name, values[0]):

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                message = wx.MessageDialog(self.ParentWindow, "\"%s\" is already used by \"%s\"!"%(name, values[0]), "Error", wx.OK|wx.ICON_ERROR)

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                message.ShowModal()

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                message.Destroy()

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            else:

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                blockname = values[2]

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                if values[1] != "function" and blockname == "":

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                    dialog = wx.TextEntryDialog(self.ParentWindow, "Block name", "Please enter a block name", "", wx.OK|wx.CANCEL|wx.CENTRE)

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                    if dialog.ShowModal():

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                        blockname = dialog.GetValue()

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                    dialog.Destroy()

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                id = self.ParentWindow.GetNewId()

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                block = FBD_Block(self.ParentWindow, values[0], blockname, id)

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                block.SetPosition(x, y)

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                width, height = block.GetMinSize()

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                block.SetSize(width, height)

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                self.ParentWindow.AddBlock(block)

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                self.ParentWindow.Controler.AddEditedElementBlock(self.ParentWindow.GetTagName(), id, values[0], blockname)

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                self.ParentWindow.RefreshBlockModel(block)

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                self.ParentWindow.RefreshBuffer()

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                self.ParentWindow.RefreshScrollBars()

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                self.ParentWindow.Refresh()

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        elif values[1] != "location":

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            if values[3] == self.ParentWindow.GetTagName():

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                id = self.ParentWindow.GetNewId()

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                if values[1] == "Output":

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                    var_type = OUTPUT

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                elif values[1] == "InOut":

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                    var_type = INPUT

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                else:

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                    var_type = INPUT

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                variable = FBD_Variable(self.ParentWindow, var_type, values[0], values[2], id)

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                variable.SetPosition(x, y)

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                width, height = variable.GetMinSize()

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                variable.SetSize(width, height)

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                self.ParentWindow.AddBlock(variable)

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                self.ParentWindow.Controler.AddEditedElementVariable(self.ParentWindow.TagName, id, var_type)

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                self.ParentWindow.RefreshVariableModel(variable)

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                self.ParentWindow.RefreshBuffer()

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                self.ParentWindow.RefreshScrollBars()

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                self.ParentWindow.Refresh()

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            else:

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                message = wx.MessageDialog(self.ParentWindow, "Variable don't belong to this POU!", "Error", wx.OK|wx.ICON_ERROR)

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                message.ShowModal()

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                message.Destroy()

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if wx.VERSION >= (2, 8, 0):

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    import wx.aui

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    class MDIViewer(wx.aui.AuiMDIChildFrame):

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        def __init__(self, parent, tagname, window, controler):

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            wx.aui.AuiMDIChildFrame.__init__(self, parent, -1, title = "")

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            sizer = wx.BoxSizer(wx.HORIZONTAL)

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            self.Viewer = Viewer(self, tagname, window, controler)

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            sizer.AddWindow(self.Viewer, 1, border=0, flag=wx.GROW)

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            self.SetSizer(sizer)

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        def GetViewer(self):

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            return self.Viewer

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"""

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Class that implements a Viewer based on a wx.ScrolledWindow for drawing and 

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manipulating graphic elements

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"""

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class Viewer(wx.ScrolledWindow):

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

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

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            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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    # Create Alignment Menu items

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    def _init_coll_AlignmentMenu_Items(self, parent):

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        # Create menu items

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS0,

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              kind=wx.ITEM_NORMAL, text=u'Left')

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS1,

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              kind=wx.ITEM_NORMAL, text=u'Center')

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS2,

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              kind=wx.ITEM_NORMAL, text=u'Right')

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS4,

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              kind=wx.ITEM_NORMAL, text=u'Top')

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS5,

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              kind=wx.ITEM_NORMAL, text=u'Middle')

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS6,

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              kind=wx.ITEM_NORMAL, text=u'Bottom')

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        # Link menu event to corresponding called functions

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        self.Bind(wx.EVT_MENU, self.OnAlignLeftMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS0)

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        self.Bind(wx.EVT_MENU, self.OnAlignCenterMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS1)

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        self.Bind(wx.EVT_MENU, self.OnAlignRightMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS2)

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        self.Bind(wx.EVT_MENU, self.OnAlignTopMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS4)

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        self.Bind(wx.EVT_MENU, self.OnAlignMiddleMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS5)

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        self.Bind(wx.EVT_MENU, self.OnAlignBottomMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS6)

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    # Create Contextual Menu items

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    def _init_coll_ContextualMenu_Items(self, parent):

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        # Create menu items

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS0,

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              kind=wx.ITEM_RADIO, text=u'No Modifier')

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS1,

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              kind=wx.ITEM_RADIO, text=u'Negated')

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS2,

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              kind=wx.ITEM_RADIO, text=u'Rising Edge')

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS3,

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              kind=wx.ITEM_RADIO, text=u'Falling Edge')

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS5,

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              kind=wx.ITEM_NORMAL, text=u'Add Wire Segment')

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS6,

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              kind=wx.ITEM_NORMAL, text=u'Delete Wire Segment')

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS8,

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              kind=wx.ITEM_NORMAL, text=u'Add Divergence Branch')

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS9,

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              kind=wx.ITEM_NORMAL, text=u'Delete Divergence Branch')

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS11,

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              kind=wx.ITEM_NORMAL, text=u'Clear Execution Order')

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS12,

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              kind=wx.ITEM_NORMAL, text=u'Reset Execution Order')

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        parent.AppendSeparator()

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        parent.AppendMenu(ID_VIEWERCONTEXTUALMENUITEMS14, "Alignment", self.AlignmentMenu)

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS16,

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              kind=wx.ITEM_NORMAL, text=u'Edit Block')

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS17,

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              kind=wx.ITEM_NORMAL, text=u'Delete')

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        # Link menu event to corresponding called functions

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        self.Bind(wx.EVT_MENU, self.OnNoModifierMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS0)

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        self.Bind(wx.EVT_MENU, self.OnNegatedMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS1)

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        self.Bind(wx.EVT_MENU, self.OnRisingEdgeMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS2)

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        self.Bind(wx.EVT_MENU, self.OnFallingEdgeMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS3)

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        self.Bind(wx.EVT_MENU, self.OnAddSegmentMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS5)

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        self.Bind(wx.EVT_MENU, self.OnDeleteSegmentMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS6)

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        self.Bind(wx.EVT_MENU, self.OnAddBranchMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS8)

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        self.Bind(wx.EVT_MENU, self.OnDeleteBranchMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS9)

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        self.Bind(wx.EVT_MENU, self.OnClearExecutionOrderMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS11)

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        self.Bind(wx.EVT_MENU, self.OnResetExecutionOrderMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS12)

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        self.Bind(wx.EVT_MENU, self.OnEditBlockMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS16)

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        self.Bind(wx.EVT_MENU, self.OnDeleteMenu,

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              id=ID_VIEWERCONTEXTUALMENUITEMS17)

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    # Create and initialize Contextual Menu

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    def _init_menus(self):

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        self.AlignmentMenu = wx.Menu(title='')

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        self.ContextualMenu = wx.Menu(title='')

   258

   259

        self._init_coll_AlignmentMenu_Items(self.AlignmentMenu)

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        self._init_coll_ContextualMenu_Items(self.ContextualMenu)

   261

   262

    # Create a new Viewer

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    def __init__(self, parent, tagname, window, controler):

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        wx.ScrolledWindow.__init__(self, parent, pos=wx.Point(0, 0), size=wx.Size(0, 0), 

   265

            style=wx.SUNKEN_BORDER | wx.HSCROLL | wx.VSCROLL)

   266

        self._init_menus()

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        # Adding a rubberband to Viewer

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        self.rubberBand = RubberBand(drawingSurface=self)

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        self.SetBackgroundColour(wx.Colour(255,255,255))

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        self.ResetView()

   271

        self.Scaling = None

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        #self.Scaling = (8, 8)

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        self.DrawGrid = True

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        self.DrawingWire = False

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        self.current_id = 0

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        self.TagName = tagname

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        # Initialize Block, Wire and Comment numbers

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        self.block_id = self.wire_id = self.comment_id = 0

   280

   281

        # Initialize Viewer mode to Selection mode

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        self.Mode = MODE_SELECTION

   283

        self.SavedMode = False

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        self.CurrentLanguage = "FBD"

   285

   286

        self.ParentWindow = window

   287

        self.Controler = controler

   288

   289

        self.SetDropTarget(ViewerDropTarget(self))

   290

   291

        # Link Viewer event to corresponding methods

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        self.Bind(wx.EVT_PAINT, self.OnPaint)

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        self.Bind(wx.EVT_LEFT_DOWN, self.OnViewerLeftDown)

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        self.Bind(wx.EVT_LEFT_UP, self.OnViewerLeftUp)

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        self.Bind(wx.EVT_LEFT_DCLICK, self.OnViewerLeftDClick)

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        self.Bind(wx.EVT_RIGHT_UP, self.OnViewerRightUp)

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        self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveViewer)

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        self.Bind(wx.EVT_MOTION, self.OnViewerMotion)

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        self.Bind(wx.EVT_CHAR, self.OnChar)

   306

   307

    def SetTagName(self, tagname):

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        self.TagName = tagname

   309

   310

    def GetTagName(self):

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        return self.TagName

   312

   313

    def IsViewing(self, tagname):

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        return self.TagName == tagname

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   316

    # Returns a new id

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    def GetNewId(self):

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        self.current_id += 1

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        return self.current_id

   320

   321

    # Destructor

   322

    def __del__(self):

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        self.ResetView()

   324

   325

    def GetLogicalDC(self, buffered=False):

   326

        if buffered:

   327

            dc = wx.BufferedPaintDC(self)

   328

        else:

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            dc = wx.ClientDC(self)

   330

        if wx.Platform == '__WXMSW__':

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            dc.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL))

   332

        else:

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            dc.SetFont(wx.NORMAL_FONT)

   334

        if wx.VERSION >= (2, 6, 0):

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            self.DoPrepareDC(dc)

   336

        else:

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            self.PrepareDC(dc)

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        return dc

   339

   340

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

   341

#                         Element management functions

   342

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

   343

   344

    def AddBlock(self, block):

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        self.block_id += 1

   346

        self.Blocks[block] = self.block_id

   347

   348

    def AddWire(self, wire):

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        self.wire_id += 1

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        self.Wires[wire] = self.wire_id

   351

   352

    def AddComment(self, comment):

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        self.comment_id += 1

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        self.Comments[comment] = self.comment_id

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   356

    def IsBlock(self, block):

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        return self.Blocks.get(block, False)

   358

   359

    def IsWire(self, wire):

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        return self.Wires.get(wire, False)

   361

   362

    def IsComment(self, comment):

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        return self.Comments.get(comment, False)

   364

   365

    def RemoveBlock(self, block):

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        self.Blocks.pop(block)

   367

   368

    def RemoveWire(self, wire):

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        self.Wires.pop(wire)

   370

   371

    def RemoveComment(self, comment):

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        self.Comments.pop(comment)

   373

   374

    def GetElements(self, sort_blocks=False, sort_wires=False, sort_comments=False):

   375

        blocks = self.Blocks.keys()

   376

        wires = self.Wires.keys()

   377

        comments = self.Comments.keys()

   378

        if sort_blocks:

   379

            blocks.sort(lambda x,y:self.Blocks[x].__cmp__(self.Blocks[y]))

   380

        if sort_wires:

   381

            wires.sort(lambda x,y:self.Wires[x].__cmp__(self.Wires[y]))

   382

        if sort_comments:

   383

            comments.sort(lambda x,y:self.Comments[x].__cmp__(self.Comments[y]))

   384

        return blocks + wires + comments

   385

   386

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

   387

#                              Reset functions

   388

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

   389

   390

    # Resets Viewer lists

   391

    def ResetView(self):

   392

        self.Blocks = {}

   393

        self.Wires = {}

   394

        self.Comments = {}

   395

        self.SelectedElement = None

   396

        self.HighlightedElement = None

   397

   398

    # Remove all elements

   399

    def CleanView(self):

   400

        for block in self.Blocks.keys():

   401

            block.Clean()

   402

        self.ResetView()

   403

   404

    # Changes Viewer mode

   405

    def SetMode(self, mode):

   406

        if self.Mode != mode or mode == MODE_SELECTION:

   407

            self.Mode = mode

   408

            self.SavedMode = False

   409

        else:

   410

            self.SavedMode = True

   411

        # Reset selection

   412

        if self.Mode != MODE_SELECTION and self.SelectedElement:

   413

            self.SelectedElement.SetSelected(False)

   414

            self.SelectedElement = None

   415

   416

    # Return current drawing mode

   417

    def GetDrawingMode(self):

   418

        return self.ParentWindow.GetDrawingMode()

   419

   420

    # Buffer the last model state

   421

    def RefreshBuffer(self):

   422

        self.Controler.BufferProject()

   423

        self.ParentWindow.RefreshTitle()

   424

        self.ParentWindow.RefreshEditMenu()

   425

   426

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

   427

#                          Refresh functions

   428

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

   429

   430

    def ResetBuffer(self):

   431

        pass

   432

   433

    # Refresh Viewer elements

   434

    def RefreshView(self):

   435

        self.current_id = 0

   436

        # Start by reseting Viewer

   437

        self.ResetView()

   438

        instance = True

   439

        # List of ids of already loaded blocks

   440

        ids = []

   441

        # Load Blocks until they are all loaded

   442

        while instance:

   443

            instance = self.Controler.GetEditedElementInstanceInfos(self.TagName, exclude=ids)

   444

            if instance:

   445

                self.loadInstance(instance, ids)

   446

        self.RefreshScrollBars()

   447

   448

        to_delete = []

   449

        for wire in self.Wires:

   450

            if not wire.IsConnectedCompatible():

   451

                to_delete.append(wire)

   452

        for wire in to_delete:

   453

            wire.Delete()

   454

   456

   457

    def RefreshScrollBars(self):

   458

        xstart, ystart = self.GetViewStart()

   459

        window_size = self.GetClientSize()

   460

        maxx = maxy = 0

   461

        for element in self.GetElements():

   465

        maxx = max(maxx + WINDOW_BORDER, xstart * SCROLLBAR_UNIT + window_size[0])

   466

        maxy = max(maxy + WINDOW_BORDER, ystart * SCROLLBAR_UNIT + window_size[1])

   467

        if self.rubberBand.IsShown():

   468

            extent = self.rubberBand.GetCurrentExtent()

   469

            maxx = max(maxx, extent.x + extent.width)

   470

            maxy = max(maxy, extent.y + extent.height)

   471

        self.SetScrollbars(SCROLLBAR_UNIT, SCROLLBAR_UNIT, 

   472

            maxx / SCROLLBAR_UNIT, maxy / SCROLLBAR_UNIT, xstart, ystart, True)

   473

   474

    # Load instance from given informations

   475

    def loadInstance(self, instance, ids):

   476

        ids.append(instance["id"])

   477

        self.current_id = max(self.current_id, instance["id"]) 

   478

        if instance["type"] == "input":

   479

            variable = FBD_Variable(self, INPUT, instance["name"], instance["value_type"], instance["id"], instance["executionOrder"])

   480

            variable.SetPosition(instance["x"], instance["y"])

   481

            variable.SetSize(instance["width"], instance["height"])

   482

            self.AddBlock(variable)

   483

            connectors = variable.GetConnectors()

   484

            connectors["output"].SetPosition(wx.Point(*instance["connector"]["position"]))

   485

            if instance["connector"]["negated"]:

   486

                connectors["output"].SetNegated(True)

   487

            if instance["connector"]["edge"]:

   488

                connectors["output"].SetEdge(instance["connector"]["edge"])

   489

        elif instance["type"] == "output":

   490

            variable = FBD_Variable(self, OUTPUT, instance["name"], instance["value_type"], instance["id"], instance["executionOrder"])

   491

            variable.SetPosition(instance["x"], instance["y"])

   492

            variable.SetSize(instance["width"], instance["height"])

   493

            self.AddBlock(variable)

   494

            connectors = variable.GetConnectors()