Viewing file:  widgets.py (2.33 KB) -rw-r--r--
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import time, os
from twisted.internet import task
from twisted.python import log, util
from nevow import athena, loaders, static
class Clock(athena.LiveFragment):
jsClass = u"WidgetDemo.Clock"
docFactory = loaders.xmlstr('''\
<div xmlns:nevow="http://nevow.com/ns/nevow/0.1"
xmlns:athena="http://divmod.org/ns/athena/0.7"
nevow:render="liveFragment">
<div>
<a href="#"><athena:handler event="onclick" handler="start" />
Start
</a>
<a href="#"><athena:handler event="onclick" handler="stop" />
Stop
</a>
</div>
<div class="clock-time" />
</div>
''')
running = False
def start(self):
if self.running:
return
self.loop = task.LoopingCall(self.updateTime)
self.loop.start(1)
self.running = True
athena.expose(start)
def stop(self):
if not self.running:
return
self.loop.stop()
self.running = False
athena.expose(stop)
def _oops(self, err):
log.err(err)
if self.running:
self.loop.stop()
self.running = False
def updateTime(self):
self.callRemote('setTime', unicode(time.ctime(), 'ascii')).addErrback(self._oops)
class WidgetPage(athena.LivePage):
docFactory = loaders.xmlstr("""\
<html xmlns:nevow="http://nevow.com/ns/nevow/0.1">
<head>
<nevow:invisible nevow:render="liveglue" />
</head>
<body>
<div nevow:render="clock">
First Clock
</div>
<div nevow:render="clock">
Second Clock
</div>
<div nevow:render="debug" />
</body>
</html>
""")
addSlash = True
def __init__(self, *a, **kw):
super(WidgetPage, self).__init__(*a, **kw)
self.jsModules.mapping[u'WidgetDemo'] = util.sibpath(__file__, 'widgets.js')
def childFactory(self, ctx, name):
ch = super(WidgetPage, self).childFactory(ctx, name)
if ch is None:
p = util.sibpath(__file__, name)
if os.path.exists(p):
ch = static.File(file(p))
return ch
def render_clock(self, ctx, data):
c = Clock()
c.page = self
return ctx.tag[c]
def render_debug(self, ctx, data):
f = athena.IntrospectionFragment()
f.setFragmentParent(self)
return ctx.tag[f]
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