The key part of zone updater that does what you want is this:
void afterRender() {
String url = resources.createEventLink(event, context).toAbsoluteURI();
...
renderSupport.addScript("%sZoneUpdater = new ZoneUpdater(%s)", prefix,
spec.toString());
}
This is the interface from Tapestry to Javascript. The string in the
addScript call is literal javascript (except for the %s) that's added to the
bottom of the page.
You are basically looking for the right url to hit from javascript that will
trigger your Tapestry method. createEventLink generates this url
('createEventLink("register", "placeholderforputtingstudentid")'), addScript
will pass it to the Javascript, and in there "zoneManager.updateFromUrl"
proceeds to ping that url. Another way to ping urls from js is with
Prototype:
http://www.prototypejs.org/api/ajax/request
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