SVGHMI: JsonTable now use intermediate variables again to address JSON data without duplicating code or referencing. Using intermediate variables also alows to check for availability of data and stop evaluating early if data is missing. Finally added complete roundtrip example to illustrate use of JSonTable to display "alarms" collected in python from changes on PLC boolean variables.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# See COPYING file for copyrights details.
from __future__ import absolute_import
from itertools import repeat, islice, chain
from connectors.SchemeEditor import SchemeEditor
Schemes = ["WAMP", "WAMPS"]
model = [('host', _("Host:")),
('path', _("Path:")),
('port', _("Port:")),
('realm', _("Realm:"))]
class WAMP_dialog(SchemeEditor):
def __init__(self, *args, **kwargs):
self.model = model
self.EnableIDSelector = True
SchemeEditor.__init__(self, *args, **kwargs)
# pylint: disable=unused-variable
def SetLoc(self, loc):
hostportpath, realm, ID = list(islice(chain(loc.split("#"), repeat("")), 3))
hostport, path = list(islice(chain(hostportpath.split("/"), repeat("")), 2))
host, port = list(islice(chain(hostport.split(":"), repeat("")), 2))
self.SetFields(locals())
def GetLoc(self):
fields = self.GetFields()
# TODO : input validation test
template = "{host}" + \
(":{port}" if fields['port'] else '') +\
("/{path}" if fields['path'] else '') +\
"#{realm}#{ID}"
return template.format(**fields)