<?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_BOOL" 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

Alarms = []

def TriggerAlarm(changed_var_name):

global Alarms

Alarms.append((time.time(), PLCGlobals.AlarmText, PLCGlobals.AlarmStatus))

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)

print newdata

vars = newdata[u'vars']

args = newdata[u'args']

visible = newdata[u'visible']

svars = (vars + [0,0])[:3]

range_feedback = svars[1]

slider_position = svars[2]

answer = self.renderTable(range_feedback, slider_position, visible, *(args+svars[3:]))

janswer = json.dumps(answer)

print janswer

return janswer

def renderTable(self, old_range, old_position, visible, *options):

new_range = len(Alarms)

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 in Alarms[new_position:new_position + new_visible]:

visible_alarms.append({

"time": time.ctime(ts),

"text": text, # TODO translate text

"status": status

})

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>