SVGHMI: add support for "enable expressions" with arbitrary variable name assignment.
HMI tree paths can be prefixed with a variable name "@name=/MY/HMI/VAR"
Widget declarations can end with a "#" followed by a JS expression that refers to name given to variables.
Widget is disabled if expression's result is false.
Commit includes some more-or-less related generated code refactoring, that should simplify extending widget's variables attributes.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz.
# See COPYING file for copyrights details.
from __future__ import absolute_import
from plcopen.XSLTModelQuery import XSLTModelQuery
class InstancesPathCollector(XSLTModelQuery):
""" object for collecting instances path list"""
def __init__(self, controller):
self.Instances = []
XSLTModelQuery.__init__(self,
controller,
"instances_path.xslt",
[("AddInstance", self.AddInstance)])
def AddInstance(self, context, *args):
self.Instances.append(args[0][0])
def Collect(self, root, name, debug):
self._process_xslt(root, debug, instance_type=name)
res = self.Instances
self.Instances = []
return res