001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.wicket.extensions.wizard;
018
019import org.apache.wicket.util.io.IClusterable;
020
021/**
022 * Receives notifications for wizard model state changes.
023 * 
024 * @author Eelco Hillenius
025 */
026public interface IWizardModelListener extends IClusterable
027{
028        /**
029         * Called when the active step of this model changed.
030         * 
031         * @param newStep
032         *            The new step
033         */
034        default void onActiveStepChanged(IWizardStep newStep)
035        {}
036
037        /**
038         * Called when the wizard was cancelled.
039         */
040        default void onCancel()
041        {}
042
043        /**
044         * Called when the wizard finished successfully.
045         */
046        default void onFinish()
047        {}
048}