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4199479
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0
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1
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2010-11-16T22:02:31.397
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0
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2010-11-16T22:02:31.397
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0
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145574
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1026162
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2
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3
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0
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text
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Firstly, you'll need to expose the url for your event handler: <pre><code>public String getModeChangedUrl() { // will call the onModeChanged method return resources.createEventLink("ModeChanged").toAbsoluteURI(); } </code></pre> Then, in a javascript block in your tml assign the url to a variable: <pre><code>var modeChangedUrl = "${modeChangedUrl}"; </code></pre> Then you need to get a handle to a ZoneManager javascript object: <pre><code>var zm = Tapestry.findZoneManagerForZone(zoneId); </code></pre> It's not important which zone you get the ZoneManager for, all this does is facilitate the ajax callback. If the event listener returns a MultiZoneUpdate or an update for a different zone, it will be handled correctly. I use a dummy zone for marshalling and always return a MultiZoneUpdate even if I'm only updating one zone. Since more often than not I need to update multiple zones, I find it easier to be consistent in my approach. anyway, that is a little off topic for your question. if you have additional parameters for the event handler, you can append them to the url separated by '/' ie "http://www.host.com/app/page/event/param1/param2" now that you have the <code>url</code> and a <code>ZoneManager</code>, you can initialise the request-response loop: <pre><code>zm.updateFromURL(url); </code></pre> as henning suggested, combining this with the <a href="http://www.prototypejs.org/api/periodicalExecuter" rel="nofollow">PeriodicalExecuter</a> in prototype will achieve what you want: <pre><code>new PeriodicalExecuter(function(pe) { var zm = Tapestry.findZoneManagerForZone("anyZoneId"); zm.updateFromUrl(url); }, 5); </code></pre>
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1. PORefreshing a Tapestry zone on a regular basis
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1. COthis has changed somewhat since T5.2. MultiZoneUpdate is a thing of the past. the client side stuff is largely the same though.
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