/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.examples.ajax.prototype;
import org.apache.wicket.examples.WicketExamplePage;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.link.ILinkListener;
import org.apache.wicket.markup.html.link.Link;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.request.handler.ComponentRenderingRequestHandler;
import org.apache.wicket.util.string.AppendingStringBuffer;
/**
* Example displaying partial page rendering using the counting link example and prototype.js.
* Prototype.js is a javascript library that provides several handy JavaScript functions, amongst
* others an Ajax.Updater function, which updates the HTML document with the response of the Ajax
* call.
*
* @author ivaynberg
*/
public class Index extends WicketExamplePage
{
/** Click count. */
private int count = 0;
/** Label showing count */
private final Label counter;
/**
* Constructor.
*/
public Index()
{
// Add the Ajaxian link to the page...
add(new Link("link")
{
/**
* Handles a click on the link. This method is accessed normally using a standard http
* request, but in this example, we use Ajax to perform the call.
*/
@Override
public void onClick()
{
// Increment count
count++;
// The response should refresh the label displaying the counter.
getRequestCycle().replaceAllRequestHandlers(
new ComponentRenderingRequestHandler(counter));
}
/**
* Alter the javascript 'onclick' event to emit the Ajax call and update the counter
* label.
*/
@Override
protected String getOnClickScript(CharSequence url)
{
return new AppendingStringBuffer("new Ajax.Updater('counter', '").append(
urlFor(ILinkListener.INTERFACE))
.append("', {method:'get'}); return false;")
.toString();
}
});
// Add the label
add(counter = new Label("counter", new PropertyModel(this, "count")));
}
/**
* @return Returns the count.
*/
public int getCount()
{
return count;
}
}