/* * 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.wicket_sapporo.workshop01.page.ajax.updating; import java.util.Arrays; import java.util.List; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior; import org.apache.wicket.markup.html.basic.Label; import org.apache.wicket.markup.html.form.DropDownChoice; import org.apache.wicket.markup.html.form.Form; import org.apache.wicket.model.IModel; import org.apache.wicket.model.Model; import org.apache.wicket.model.util.ListModel; import org.wicket_sapporo.workshop01.page.WS01TemplatePage; /** * フォームに変更があった際にすぐにsubmitするAjaxのサンプル. * * @author Hiroto Yamakawa */ public class FormUpdatingPage extends WS01TemplatePage { private static final long serialVersionUID = 4879380561190751982L; /** * Construct. */ public FormUpdatingPage() { // 選択肢のモデルを用意. IModel<List<String>> dropDownModel = new ListModel<>(Arrays.asList("札幌", "東京", "大阪", "福岡")); // 洗濯結果を取り扱うモデルを用意. IModel<String> choicedModel = new Model<String>(null); Form<Void> form = new Form<Void>("form"); add(form); final Label choiced = new Label("choiced", choicedModel) { private static final long serialVersionUID = 4475505735169776541L; @Override protected void onInitialize() { super.onInitialize(); // Ajaxで更新されるコンポーネントには setOuntPutMarkupId(true) を実行する // これにより、JavaScriptでフックされるidがタグに追加される setOutputMarkupId(true); } }; form.add(choiced); // ドロップダウン形式のコンポーネントを用意. form.add(new DropDownChoice<String>("dropDown", choicedModel, dropDownModel) { private static final long serialVersionUID = 9123857368996631355L; @Override protected void onInitialize() { super.onInitialize(); add(new AjaxFormComponentUpdatingBehavior("change") { private static final long serialVersionUID = -5435266116249371422L; @Override protected void onUpdate(AjaxRequestTarget target) { // choiced 変数のコンポーネントを更新 target.add(choiced); } }); } }); } }