--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/py_ext/modules/svgui/svgui_server.py Tue May 08 17:08:45 2012 +0200
@@ -0,0 +1,130 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+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
+