On Tue, 10 Dec 2013 19:05:26 -0200, Javier Val Lista
<javilan...@gmail.com> wrote:
This is what I was trying at first, catching the onchange event of the
select component by javascritp, and launch an ajax request to the
server. The
problem is Tapestry does not recognize the "GET" url...
Tapestry does recognize GET URLs, but not any.
Do you know if Tapestry handles url with a different format?
No. It uses HTTP.
Here's an example, not tested:
@Inject
private ComponentResources resources;
@Inject
private RenderSupport renderSupport; // JavaScriptSupport from 5.2 on
@Inject
private Request request;
void afterRender() {
// creates an URL for the 'myValueChanged' event
Link link = resources.createEventLink("myValueChanged");
// write a call to a JavaScript function
renderSupport.addScript("setMyValueChangedUrl('%s');"),
link.toAbsoluteURI());
}
// handle the AJAX request.
Object onMyValueChanged() {
String value = request.getParameter("value");
// do whatever you want with value
String newValue = ...;
JSONObject object = new JSONObject();
object.put("newValue", newValue);
return object;
}
In a .js file included in the page and using Prototype.js, but it can be
easily switched to jQuery if you're already using it:
var myValueChangedUrl = null;
function setMyValueChangedUrl(url) {
myValueChangedUrl = url;
}
$('yourSelectId').observe('change', function(event) {
// adding the value as a query parameter
var url = myValueChangedUrl + '?value=' +
encodeUri($('yourSelectId').getValue());
// do AJAX request
new Ajax.Request(url, {
// process response
onSuccess: function(transport) {
// transport.responseJSON is the JSONObject returned in your event
handler method
value response = transport.headerJSON;
// do something with the response
window.alert(response.newValue);
}
});
});
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
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