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.markup.repeater; 018 019import org.apache.wicket.core.util.string.CssUtils; 020import org.apache.wicket.markup.ComponentTag; 021import org.apache.wicket.model.IModel; 022 023/** 024 * Item that sets class="even" or class="odd" attributes based on its index 025 * 026 * @author Igor Vaynberg (ivaynberg) 027 * @param <T> 028 * type of Item's model object 029 * 030 */ 031public class OddEvenItem<T> extends Item<T> 032{ 033 private static final long serialVersionUID = 1L; 034 035 public static final String ODD_CSS_CLASS_KEY = CssUtils.key(OddEvenItem.class, "odd"); 036 037 public static final String EVEN_CSS_CLASS_KEY = CssUtils.key(OddEvenItem.class, "even"); 038 039 /** 040 * Constructor 041 * 042 * @param id 043 * component id 044 * @param index 045 * item index 046 * @param model 047 * item model 048 */ 049 public OddEvenItem(String id, int index, IModel<T> model) 050 { 051 super(id, index, model); 052 } 053 054 @Override 055 protected void onComponentTag(ComponentTag tag) 056 { 057 super.onComponentTag(tag); 058 059 tag.put("class", (getIndex() % 2 == 0) ? getString(EVEN_CSS_CLASS_KEY) : getString(ODD_CSS_CLASS_KEY)); 060 } 061 062}