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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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from types import TupleType

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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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if wx.Platform == '__WXMSW__':

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    faces = { 'times': 'Times New Roman',

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              'mono' : 'Courier New',

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              'helv' : 'Arial',

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              'other': 'Comic Sans MS',

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              'size' : 20,

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             }

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else:

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    faces = { 'times': 'Times',

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              'mono' : 'Courier',

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              'helv' : 'Helvetica',

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              'other': 'new century schoolbook',

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              'size' : 20,

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             }

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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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        scaling = self.ParentWindow.Scaling

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        message = None

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        try:

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            values = eval(data)

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        except:

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            message = "Invalid value \"%s\" for viewer block"%data

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            values = None

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        if not isinstance(values, TupleType):

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            message = "Invalid value \"%s\" for viewer block"%data

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            values = None

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        if values is not None:

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            if values[1] == "debug":

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                pass

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            elif values[1] == "program":

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                message = "Programs can't be used by other POUs!"

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

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

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                words = self.ParentWindow.TagName.split("::")

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                if name == values[0]:

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                    message = "\"%s\" can't use itself!"%name

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

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                    message = "Function Blocks can't be used in Functions!"

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                elif words[0] == "T" and values[1] != "function":

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                    message = "Function Blocks can't be used in Transitions!"

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

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                    message = "\"%s\" is already used by \"%s\"!"%(name, values[0])

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                else:

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                    blockname = values[2]

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                    if len(values) > 3:

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                        blockinputs = values[3]

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                    else:

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                        blockinputs = None

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

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

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

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                            blockname = dialog.GetValue()

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                        else:

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                            return

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                        dialog.Destroy()

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                    if blockname.upper() in [name.upper() for name in self.ParentWindow.Controler.GetProjectPouNames(self.ParentWindow.Debug)]:

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                        message = "\"%s\" pou already exists!"%blockname

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                    elif blockname.upper() in [name.upper() for name in self.ParentWindow.Controler.GetEditedElementVariables(self.ParentWindow.GetTagName(), self.ParentWindow.Debug)]:

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                        message = "\"%s\" element for this pou already exists!"%blockname

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                    else:

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                        id = self.ParentWindow.GetNewId()

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

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                        width, height = block.GetMinSize()

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                        if scaling is not None:

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                            x = round(float(x) / float(scaling[0])) * scaling[0]

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                            y = round(float(y) / float(scaling[1])) * scaling[1]

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                            width = round(float(width) / float(scaling[0]) + 0.5) * scaling[0]

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                            height = round(float(height) / float(scaling[1]) + 0.5) * scaling[1]

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                        block.SetPosition(x, y)

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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.RefreshVisibleElements()

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                        self.ParentWindow.ParentWindow.RefreshVariablePanel(self.ParentWindow.GetTagName())

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                        self.ParentWindow.Refresh(False)

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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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                    width, height = variable.GetMinSize()

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                    if scaling is not None:

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                        x = round(float(x) / float(scaling[0])) * scaling[0]

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                        y = round(float(y) / float(scaling[1])) * scaling[1]

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                        width = round(float(width) / float(scaling[0]) + 0.5) * scaling[0]

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                        height = round(float(height) / float(scaling[1]) + 0.5) * scaling[1]

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                    variable.SetPosition(x, y)

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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.GetTagName(), 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.RefreshVisibleElements()

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                    self.ParentWindow.Refresh(False)

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                else:

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                    message = "Variable don't belong to this POU!"

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        if message is not None:

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            wx.CallAfter(self.ShowMessage, message)

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    def ShowMessage(self, message):

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        message = wx.MessageDialog(self.ParentWindow, message, "Error", wx.OK|wx.ICON_ERROR)

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        message.ShowModal()

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        message.Destroy()

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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='')

   292

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

   293

   294

        self._init_coll_AlignmentMenu_Items(self.AlignmentMenu)

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        self._init_coll_ContextualMenu_Items(self.ContextualMenu)

   296

   297

    # Create a new Viewer

   298

    def __init__(self, parent, tagname, window, controler, debug = False, instancepath = ""):

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

   300

            style=wx.HSCROLL | wx.VSCROLL)

   301

        self._init_menus()

   302

        # Adding a rubberband to Viewer

   303

        self.rubberBand = RubberBand(drawingSurface=self)

   304

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

   305

        self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)

   306

        self.ResetView()

   307

        self.Scaling = None

   308

        self.DrawGrid = True

   309

        self.GridBrush = wx.TRANSPARENT_BRUSH

   310

        self.PageSize = None

   311

        self.PagePen = wx.TRANSPARENT_PEN

   312

        self.DrawingWire = False

   313

        self.current_id = 0

   314

        self.TagName = tagname

   315

        self.Errors = []

   316

        self.Debug = debug

   317

        self.InstancePath = instancepath

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        # Initialize Block, Wire and Comment numbers

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

   321

   322

        # Initialize Viewer mode to Selection mode

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        self.Mode = MODE_SELECTION

   324

        self.SavedMode = False

   325

        self.CurrentLanguage = "FBD"

   326

   327

        self.ParentWindow = window

   328

        self.Controler = controler

   329

   330

        if not self.Debug:

   331

            self.SetDropTarget(ViewerDropTarget(self))

   332

   333

        dc = wx.ClientDC(self)

   334

        font = wx.Font(faces["size"], wx.SWISS, wx.NORMAL, wx.NORMAL, faceName = faces["mono"])

   335

        dc.SetFont(font)

   336

        width, height = dc.GetTextExtent("ABCDEFGHIJKLMNOPQRSTUVWXYZ")

   337

        while width > 260:

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            faces["size"] -= 1

   339

            font = wx.Font(faces["size"], wx.SWISS, wx.NORMAL, wx.NORMAL, faceName = faces["mono"])

   340

            dc.SetFont(font)

   341

            width, height = dc.GetTextExtent("ABCDEFGHIJKLMNOPQRSTUVWXYZ")

   342

        self.SetFont(font)

   343

   344

        self.ResetView()

   345

   346

        # Link Viewer event to corresponding methods

   347

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

   348

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

   349

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

   350

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

   351

        self.Bind(wx.EVT_RIGHT_DOWN, self.OnViewerRightDown)

   352

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

   353

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

   354

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

   355

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

   356

        self.Bind(wx.EVT_SCROLLWIN, self.OnScrollWindow)

   357

        self.Bind(wx.EVT_MOUSEWHEEL, self.OnMouseWheelWindow)

   358

        self.Bind(wx.EVT_SIZE, self.OnMoveWindow)

   359

   360

    def GetScrolledRect(self, rect):

   361

        rect.x, rect.y = self.CalcScrolledPosition(rect.x, rect.y)

   362

        return rect

   363

   364

    def GetScaling(self):

   365

        return self.Scaling

   366

   367

    def SetTagName(self, tagname):

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        self.TagName = tagname

   369

   370

    def GetTagName(self):

   371

        return self.TagName

   372

   373

    def GetInstancePath(self):

   374

        return self.InstancePath

   375

   376

    def IsViewing(self, tagname):

   377

        if self.Debug:

   378

            return self.InstancePath == tagname

   379

        else:

   380

            return self.TagName == tagname

   381

   382

    # Returns a new id

   383

    def GetNewId(self):

   384

        self.current_id += 1

   385

        return self.current_id

   386

   387

    # Destructor

   388

    def __del__(self):

   389

        self.Flush()

   390

        self.ResetView()

   391

   392

    def GetLogicalDC(self, buffered=False):

   393

        if buffered:

   394

            dc = wx.AutoBufferedPaintDC(self)

   395

        else:

   396

            dc = wx.ClientDC(self)

   397

        dc.SetFont(self.GetFont())

   398

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

   399

            self.DoPrepareDC(dc)

   400

        else:

   401

            self.PrepareDC(dc)

   402

        return dc

   403

   404

    def GetMiniFont(self):

   405

        font = self.GetFont()

   406

        return wx.Font(font.GetPointSize() * 0.75, wx.SWISS, wx.NORMAL, wx.NORMAL, faceName = faces["helv"])

   407

   408

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

   409

#                         Element management functions

   410

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

   411

   412

    def AddBlock(self, block):

   413

        self.block_id += 1

   414

        self.Blocks[block] = self.block_id

   415

   416

    def AddWire(self, wire):

   417

        self.wire_id += 1

   418

        self.Wires[wire] = self.wire_id

   419

   420

    def AddComment(self, comment):

   421

        self.comment_id += 1

   422

        self.Comments[comment] = self.comment_id

   423

   424

    def IsBlock(self, block):

   425

        return self.Blocks.get(block, False)

   426

   427

    def IsWire(self, wire):

   428

        return self.Wires.get(wire, False)

   429

   430

    def IsComment(self, comment):

   431

        return self.Comments.get(comment, False)

   432

   433

    def RemoveBlock(self, block):

   434

        self.Blocks.pop(block)

   435

   436

    def RemoveWire(self, wire):

   437

        self.Wires.pop(wire)

   438

   439

    def RemoveComment(self, comment):

   440

        self.Comments.pop(comment)

   441

   442

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

   443

        blocks = self.Blocks.keys()

   444

        wires = self.Wires.keys()

   445

        comments = self.Comments.keys()

   446

        if sort_blocks:

   447

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

   448

        if sort_wires:

   449

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

   450

        if sort_comments:

   451

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

   452

        return blocks + wires + comments

   453

   454

    def RefreshVisibleElements(self, xp = None, yp = None):

   455

        x, y = self.CalcUnscrolledPosition(0, 0)

   456

        if xp is not None:

   457

            x = xp * self.GetScrollPixelsPerUnit()[0]

   458

        if yp is not None:

   459

            y = yp * self.GetScrollPixelsPerUnit()[1]

   460

        width, height = self.GetClientSize()

   461

        screen = wx.Rect(x, y, width, height)

   462

        for comment in self.Comments:

   463

            comment.TestVisible(screen)

   464

        for wire in self.Wires:

   465

            wire.TestVisible(screen)

   466

        for block in self.Blocks:

   467

            block.TestVisible(screen)

   468

   469

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

   470

#                              Reset functions

   471

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

   472

   473

    # Resets Viewer lists

   474

    def ResetView(self):

   475

        self.Blocks = {}

   476

        self.Wires = {}

   477

        self.Comments = {}

   478

        self.Subscribed = {}

   479

        self.SelectedElement = None

   480

        self.HighlightedElement = None

   481

   482

    def Flush(self):

   485

        for block in self.Blocks:

   486

            block.Flush()

   487

   488

    # Remove all elements

   489

    def CleanView(self):

   490

        for block in self.Blocks.keys():