tests/svghmi/py_ext_0@py_ext/pyfile.xml
author Edouard Tisserant <edouard.tisserant@gmail.com>
Thu, 10 Dec 2020 11:37:27 +0100
branchsvghmi
changeset 3087 9b50ffe6264a
parent 3069 a9b03c2634c5
child 3151 8e5d383a58cb
permissions -rw-r--r--
Python Safe Globals now have more reliable triggering of OnChange call. Added "Onchange" object to accessible runtime variables that let user python code see count of changes and first and last values.
<?xml version='1.0' encoding='utf-8'?>
<PyFile xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <variables>
    <variable name="AlarmNotify" type="HMI_INT"/>
    <variable name="SendAlarm" type="HMI_INT" onchange="TriggerAlarm"/>
    <variable name="AlarmText" type="HMI_STRING" initial="'POS'"/>
    <variable name="AlarmStatus" type="HMI_STRING" initial="'alarm'"/>
  </variables>
  <globals>
    <xhtml:p><![CDATA[
from twisted.web.resource import Resource
import json, time, random, collections

Alarms = []
AlarmIndex = {}
lastid = 0

def TriggerAlarm(changed_var_name):
    global Alarms, lastid
    new_entry = [time.time(), PLCGlobals.AlarmText, PLCGlobals.AlarmStatus, lastid]
    Alarms.append(new_entry)
    AlarmIndex[lastid] = new_entry
    lastid = lastid + 1
    PLCGlobals.AlarmNotify = random.randint(0, 4294967296)

class AlarmJsonResource(Resource):
    def render_GET(self, request):
        return ''

    def render_POST(self, request):
        newstr = request.content.getvalue()
        newdata = json.loads(newstr)
        args = newdata[u'args']
        range_feedback = newdata[u'range']
        slider_position = newdata[u'position']
        visible = newdata[u'visible']
        extra = newdata[u'extra']
        options = newdata[u'options']

        if len(options) == 2 :
            action, alarmid = options
            if action == "onClick[acknowledge]":
                AlarmIndex[int(alarmid)][2] = "ack"

        answer = self.renderTable(range_feedback, slider_position, visible, extra)
        janswer = json.dumps(answer)
        return janswer

    def renderTable(self, old_range, old_position, visible, extra):
        if len(extra) > 0 and extra[0] != "":
            fAlarms = [alrm for alrm in Alarms if alrm[1].find(extra[0])!=-1]
        else:
            fAlarms = Alarms
        new_range = len(fAlarms)
        delta = new_range - visible
        new_position = 0 if delta <= 0 else delta if old_position > delta else old_position
        new_visible = new_range if delta <= 0 else visible
        
        visible_alarms = []
        for ts, text, status, alarmid in fAlarms[new_position:new_position + new_visible]:
            visible_alarms.append({
                "time": time.ctime(ts),
                "text": text, # TODO translate text
                "status": status,
                "alarmid": alarmid
            })

        return new_range, new_position, visible_alarms


]]></xhtml:p>
  </globals>
  <init>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </init>
  <cleanup>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </cleanup>
  <start>
    <xhtml:p><![CDATA[

svghmi_root.putChild("alarms", AlarmJsonResource())


]]></xhtml:p>
  </start>
  <stop>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </stop>
</PyFile>