/*
 * 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.ajax;


/**
 * This interface makes it trivial to use busy indicators for ajax requests.
 * This interface can be implemented by a component that has an ajax behavior
 * attached to it, or by the ajax behavior itself. If this is the case
 * javascript will be added automatically that will show a markup element
 * pointed to by the {@link #getAjaxIndicatorMarkupId()} markup id attribute
 * when the ajax request begins, and hide it when the ajax requests succeeds or
 * fails.
 * <p>
 * If both a component and a behavior implement this interface, the component
 * will take precedence.
 * 
 * @since 1.2
 * 
 * @author Igor Vaynberg (ivaynberg)
 * 
 */
public interface IAjaxIndicatorAware
{
	/**
	 * @return the value of the markup id attribute of the indicating element
	 */
	String getAjaxIndicatorMarkupId();
}

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Update Javadoc to indicate you can attach this to a parent.