HGKeeper

#!/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.

# 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

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