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.ajax.markup.html.navigation.paging; 018 019import org.apache.wicket.Component; 020import org.apache.wicket.ajax.AjaxEventBehavior; 021import org.apache.wicket.ajax.AjaxRequestTarget; 022import org.apache.wicket.ajax.markup.html.IAjaxLink; 023import org.apache.wicket.markup.ComponentTag; 024import org.apache.wicket.markup.html.navigation.paging.IPageable; 025 026/** 027 * Ajax behavior for the paging navigation links. This behavior can only have one parent: the link 028 * it is attached to. 029 * 030 * @since 1.2 031 * 032 * @author Martijn Dashorst 033 */ 034public class AjaxPagingNavigationBehavior extends AjaxEventBehavior 035{ 036 /** For serialization. */ 037 private static final long serialVersionUID = 1L; 038 039 /** 040 * The ajaxian link that should receive the event. 041 */ 042 private final IAjaxLink owner; 043 044 /** 045 * Attaches the navigation behavior to the owner link and drives the pageable component. The 046 * behavior is attached to the markup event. 047 * 048 * @param owner 049 * the owner ajax link 050 * @param pageable 051 * the pageable to update 052 * @param event 053 * the javascript event to bind to (e.g. onclick) 054 */ 055 public AjaxPagingNavigationBehavior(IAjaxLink owner, IPageable pageable, String event) 056 { 057 super(event); 058 this.owner = owner; 059 } 060 061 /** 062 * The ajax event handler. This will execute the event, and update the following components, 063 * when present: the navigator the owner link is part of, or when the link is a stand alone 064 * component, the link itself. Also the pageable's parent markup container is updated, so its 065 * contents can be replaced with the newly generated pageable. 066 * 067 * @see org.apache.wicket.ajax.AjaxEventBehavior#onEvent(org.apache.wicket.ajax.AjaxRequestTarget) 068 */ 069 @Override 070 protected void onEvent(AjaxRequestTarget target) 071 { 072 // handle the event 073 owner.onClick(target); 074 075 // find the PagingNavigator parent of this link 076 AjaxPagingNavigator navigator = ((Component)owner).findParent(AjaxPagingNavigator.class); 077 078 // if this is embedded inside a navigator 079 if (navigator != null) 080 { 081 // tell the PagingNavigator to update the IPageable 082 navigator.onAjaxEvent(target); 083 } 084 } 085 086 /** 087 * @see org.apache.wicket.ajax.AjaxEventBehavior#onComponentTag(org.apache.wicket.markup.ComponentTag) 088 */ 089 @Override 090 protected void onComponentTag(ComponentTag tag) 091 { 092 if (getComponent().isEnabledInHierarchy()) 093 { 094 super.onComponentTag(tag); 095 } 096 } 097}