svgui/svgui_server.py
author Sergey Surkov <surkovsv93@gmail.com>
Tue, 18 Oct 2016 17:44:08 +0300
changeset 1544 2969c2123105
parent 1511 91538d0c242c
child 1730 64d8f52bc8c8
permissions -rw-r--r--
Fix bug with two or more wires connected to one input. Now only one wire can be connected to one input, except BOOLean signals in LD and SFC. If user trying to connect wire with already connected input, wire highlight will become red.
Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
#!/usr/bin/env python
# -*- coding: utf-8 -*-

# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
# See COPYING file for copyrights details.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

import os

from nevow import rend, appserver, inevow, tags, loaders, athena
import simplejson as json

svgfile = '%(svgfile)s'

svguiWidgets = {}

currentId = 0
def getNewId():
    global currentId
    currentId += 1
    return currentId

class SvguiWidget:
    
    def __init__(self, classname, id, **kwargs):
        self.classname = classname
        self.id = id
        self.attrs = kwargs.copy()
        self.inputs = {}
        self.outputs = {}
        self.inhibit = False
        self.changed = False

    def setinput(self, attrname, value):
        self.inputs[attrname] = value
        
    def getinput(self, attrname, default=None):
        if not self.inputs.has_key(attrname):
            self.inputs[attrname] = default
        return self.inputs[attrname]

    def setoutput(self, attrname, value):
        if self.outputs.get(attrname) != value:
            self.outputs[attrname] = value
            self.changed = True
            self.RefreshInterface()
        
    def updateoutputs(self, **kwargs):
        for attrname, value in kwargs.iteritems():
            if self.outputs.get(attrname) != value:
                self.outputs[attrname] = value
                self.changed = True
        self.RefreshInterface()
        
    def RefreshInterface(self):
        interface = website.getHMI()
        if isinstance(interface, SVGUI_HMI) and self.changed and not self.inhibit:
            self.changed = False
            d = interface.sendData(self)
            if d is not None:
                self.inhibit = True
                d.addCallback(self.InterfaceRefreshed)
    
    def InterfaceRefreshed(self, result):
        self.inhibit = False
        if self.changed:
            self.RefreshInterface()

def get_object_init_state(obj):
    # Convert objects to a dictionary of their representation
    attrs = obj.attrs.copy()
    attrs.update(obj.inputs)
    d = { '__class__': obj.classname,
          'id': obj.id,
          'kwargs': json.dumps(attrs),
          }
    return d

def get_object_current_state(obj):
    # Convert objects to a dictionary of their representation
    d = { '__class__': obj.classname,
          'id': obj.id,
          'kwargs': json.dumps(obj.outputs),
          }
    return d

class SVGUI_HMI(website.PLCHMI):
    jsClass = u"LiveSVGPage.LiveSVGWidget"
    
    docFactory = loaders.stan(tags.div(render=tags.directive('liveElement'))[                                    
                                         tags.xml(loaders.xmlfile(os.path.join(WorkingDir, svgfile))),
                                         ])
    
    def HMIinitialisation(self):
        gadgets = []
        for gadget in svguiWidgets.values():
            gadgets.append(unicode(json.dumps(gadget, default=get_object_init_state, indent=2), 'ascii'))
        d = self.callRemote('init', gadgets)
        d.addCallback(self.HMIinitialised)
    
    def sendData(self,data):
        if self.initialised:
            return self.callRemote('receiveData',unicode(json.dumps(data, default=get_object_current_state, indent=2), 'ascii'))
        return None
        
    def setattr(self, id, attrname, value):
        svguiWidgets[id].setinput(attrname, value)

def createSVGUIControl(*args, **kwargs):
    id = getNewId()
    gad = SvguiWidget(args[0], id, **kwargs)
    svguiWidgets[id] = gad
    gadget = [unicode(json.dumps(gad, default=get_object_init_state, indent=2), 'ascii')]
    interface = website.getHMI()
    if isinstance(interface, SVGUI_HMI) and interface.initialised:
        interface.callRemote('init', gadget)
    return id

def setAttr(id, attrname, value):
    gad = svguiWidgets.get(id, None)
    if gad is not None:
        gad.setoutput(attrname, value)

def updateAttr(id, **kwargs):
    gad = svguiWidgets.get(id, None)
    if gad is not None:
        gad.updateoutput(**kwargs)

def getAttr(id, attrname, default=None):
    gad = svguiWidgets.get(id, None)
    if gad is not None:
        return gad.getinput(attrname, default)
    return default