ajaxfallbackorderbylink.java

Wicket一个开发Java Web应用程序框架。它使得开发web应用程序变得容易而轻松。 Wicket利用一个POJO data beans组件使得它可以与任何持久层技术相结合。

/*
 * 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.extensions.ajax.markup.html.repeater.data.sort;

import org.apache.wicket.ajax.AjaxEventBehavior;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.IAjaxCallDecorator;
import org.apache.wicket.ajax.calldecorator.CancelEventIfNoAjaxDecorator;
import org.apache.wicket.extensions.markup.html.repeater.data.sort.ISortStateLocator;
import org.apache.wicket.extensions.markup.html.repeater.data.sort.OrderByLink;


/**
 * Ajaxified {@link OrderByLink}
 * 
 * @see OrderByLink
 * 
 * @since 1.2.1
 * 
 * @author Igor Vaynberg (ivaynberg)
 * 
 */
public abstract class AjaxFallbackOrderByLink extends OrderByLink
{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	/**
	 * Constructor
	 * 
	 * @param id
	 * @param property
	 * @param stateLocator
	 * @param cssProvider
	 */
	public AjaxFallbackOrderByLink(String id, String property, ISortStateLocator stateLocator,
			ICssProvider cssProvider)
	{
		this(id, property, stateLocator, cssProvider, null);
	}

	/**
	 * Constructor
	 * 
	 * @param id
	 * @param property
	 * @param stateLocator
	 */
	public AjaxFallbackOrderByLink(String id, String property, ISortStateLocator stateLocator)
	{
		this(id, property, stateLocator, DefaultCssProvider.getInstance(), null);
	}


	/**
	 * Constructor
	 * 
	 * @param id
	 * @param property
	 * @param stateLocator
	 * @param decorator
	 */
	public AjaxFallbackOrderByLink(String id, String property, ISortStateLocator stateLocator,
			final IAjaxCallDecorator decorator)
	{
		this(id, property, stateLocator, DefaultCssProvider.getInstance(), decorator);
	}

	/**
	 * Constructor
	 * 
	 * @param id
	 * @param property
	 * @param stateLocator
	 * @param cssProvider
	 * @param decorator
	 */
	public AjaxFallbackOrderByLink(String id, String property, ISortStateLocator stateLocator,
			ICssProvider cssProvider, final IAjaxCallDecorator decorator)
	{
		super(id, property, stateLocator, cssProvider);

		add(new AjaxEventBehavior("onclick")
		{
			private static final long serialVersionUID = 1L;

			protected void onEvent(AjaxRequestTarget target)
			{
				onClick();
				onAjaxClick(target);
			}

			protected IAjaxCallDecorator getAjaxCallDecorator()
			{
				return new CancelEventIfNoAjaxDecorator(decorator);
			}

		});

	}

	/**
	 * Callback method when an ajax click occurs. All the behavior of changing the sort, etc is
	 * already performed bfore this is called so this method should primarily be used to configure
	 * the target.
	 * 
	 * @param target
	 */
	protected abstract void onAjaxClick(AjaxRequestTarget target);


}