Java tutorial
/* * 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; import org.apache.wicket.util.io.IClusterable; /** * 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 any parent of the * component, 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) * */ @FunctionalInterface public interface IAjaxIndicatorAware extends IClusterable { /** * @return the value of the markup id attribute of the indicating element */ String getAjaxIndicatorMarkupId(); }