完整代码：
<!DOCTYPE html> <HTML> <HEAD> <TITLE> ZTREE DEMO - beforeExpand / onExpand && beforeCollapse / onCollapse</TITLE> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" href="../../../css/demo.css" type="text/css"> <link rel="stylesheet" href="../../../css/zTreeStyle/zTreeStyle.css" type="text/css"> <script type="text/javascript" src="../../../js/jquery-1.4.4.min.js"></script> <script type="text/javascript" src="../../../js/jquery.ztree.core.js"></script> <!-- <script type="text/javascript" src="../../../js/jquery.ztree.excheck.js"></script> <script type="text/javascript" src="../../../js/jquery.ztree.exedit.js"></script>--> <SCRIPT type="text/javascript"> <!-- var setting = { view: { selectedMulti: false }, data: { key: { title:"t" }, simpleData: { enable: true } }, callback: { beforeClick: beforeClick, beforeCollapse: beforeCollapse, beforeExpand: beforeExpand, onCollapse: onCollapse, onExpand: onExpand } }; var zNodes =[ { id:1, pId:0, name:"可折腾的父节点 1", t:"我很普通，随便 展开/折叠 我吧", open:false}, { id:11, pId:1, name:"叶子节点 - 1", t:"我老爸很普通，随便折腾他吧"}, { id:12, pId:1, name:"可折腾的父节点 2", t:"我和我老爸都很普通，随便折腾我和他吧", open: false}, { id:121, pId:12, name:"父节点 - 121", t:"我老爸很普通，随便折腾他吧", open:true}, { id:1211, pId:121, name:"父节点 - 1211", t:"我老爸很普通，随便折腾他吧", open:false}, { id:1212, pId:1211, name:"叶子节点 - 1212", t:"我老爸很普通，随便折腾他吧"}, { id:1213, pId:121, name:"父节点 - 1213", t:"我老爸很普通，随便折腾他吧", open:false}, { id:1214, pId:1213, name:"叶子节点 - 1214", t:"我老爸很普通，随便折腾他吧"}, { id:123, pId:12, name:"叶子节点 - 23", t:"我老爸很普通，随便折腾他吧"}, { id:13, pId:1, name:"叶子节点 - 3", t:"我老爸很普通，随便折腾他吧"}, { id:2, pId:1, name:"无法折叠的父节点", t:"休想让我折叠起来...除非你用 expandAll 方法", open:false, collapse:false}, { id:21, pId:2, name:"叶子节点2 - 1", t:"哈哈哈，我老爸NB吧，不能折叠吧？"}, { id:22, pId:21, name:"叶子节点2 - 2", t:"哈哈哈，我老爸NB吧，不能折叠吧？"}, { id:23, pId:21, name:"叶子节点2 - 3", t:"哈哈哈，我老爸NB吧，不能折叠吧？"}, { id:3, pId:2, name:"无法展开的父节点", t:"就凭你也想展开我？难呀...嘿嘿, 除非你用 expandAll 方法", open:false, expand:false}, { id:31, pId:3, name:"叶子节点3 - 1", t:"居然让你看到了...莫非你用了全部节点展开？"}, { id:32, pId:31, name:"叶子节点3 - 2", t:"居然让你看到了...莫非你用了全部节点展开？"}, { id:33, pId:31, name:"叶子节点3 - 3", t:"居然让你看到了...莫非你用了全部节点展开？"}, { id:4, pId:3, name:"空空的父节点 1", t:"一无所有...除了我自己", isParent:true, open:false} ]; var log, className = "dark"; function beforeClick(treeId, treeNode) { if (treeNode.isParent) { return true; } else { alert("这个 Demo 是用来测试 展开 / 折叠 的...\n\n去点击父节点吧... "); return false; } } function beforeCollapse(treeId, treeNode) { className = (className === "dark" ? "":"dark"); showLog("[ "+getTime()+" beforeCollapse ] " + treeNode.name ); return (treeNode.collapse !== false); } function onCollapse(event, treeId, treeNode) { showLog("[ "+getTime()+" onCollapse ] " + treeNode.name); } function beforeExpand(treeId, treeNode) { className = (className === "dark" ? "":"dark"); showLog("[ "+getTime()+" beforeExpand ] " + treeNode.name ); return (treeNode.expand !== false); } function onExpand(event, treeId, treeNode) { showLog("[ "+getTime()+" onExpand ] " + treeNode.name); } function showLog(str) { if (!log) log = $("#log"); log.append("<li class='"+className+"'>"+str+"</li>"); if(log.children("li").length > 8) { log.get(0).removeChild(log.children("li")[0]); } } function getTime() { var now= new Date(), h=now.getHours(), m=now.getMinutes(), s=now.getSeconds(), ms=now.getMilliseconds(); return (h+":"+m+":"+s+ " " +ms); } function expandNode(e) { var zTree = $.fn.zTree.getZTreeObj("treeDemo"), type = e.data.type, nodes = zTree.getSelectedNodes(); if (type.indexOf("All")<0 && nodes.length == 0) { alert("请先选择一个父节点"); } if (type == "expandAll") { zTree.expandAll(true); } else if (type == "collapseAll") { zTree.expandAll(false); } else { var callbackFlag = $("#callbackTrigger").attr("checked"); for (var i=0, l=nodes.length; i<l; i++) { zTree.setting.view.fontCss = {}; if (type == "expand") { zTree.expandNode(nodes[i], true, null, null, callbackFlag); } else if (type == "collapse") { zTree.expandNode(nodes[i], false, null, null, callbackFlag); } else if (type == "toggle") { zTree.expandNode(nodes[i], null, null, null, callbackFlag); } else if (type == "expandSon") { zTree.expandNode(nodes[i], true, true, null, callbackFlag); } else if (type == "collapseSon") { zTree.expandNode(nodes[i], false, true, null, callbackFlag); } } } } $(document).ready(function(){ $.fn.zTree.init($("#treeDemo"), setting, zNodes); $("#expandBtn").bind("click", {type:"expand"}, expandNode); $("#collapseBtn").bind("click", {type:"collapse"}, expandNode); $("#toggleBtn").bind("click", {type:"toggle"}, expandNode); $("#expandSonBtn").bind("click", {type:"expandSon"}, expandNode); $("#collapseSonBtn").bind("click", {type:"collapseSon"}, expandNode); $("#expandAllBtn").bind("click", {type:"expandAll"}, expandNode); $("#collapseAllBtn").bind("click", {type:"collapseAll"}, expandNode); }); //--> </SCRIPT> </HEAD> <BODY> <h1>展开 / 折叠父节点控制</h1> <h6>[ 文件路径: core/expand.html ]</h6> <div class="content_wrap"> <div class="zTreeDemoBackground left"> <ul id="treeDemo" class="ztree"></ul> </div> <div class="right"> <ul class="info"> <li class="title"><h2>1、beforeCollapse / onCollapse<br/> beforeExpand / onExpand 事件回调函数控制</h2> <ul class="list"> <li>利用 collapse / expand 事件回调函数 可以控制父节点是否允许 展开 / 折叠，这里简单演示如何监控此事件</li> <li><p>试试看：<br/> <input type="checkbox" id="callbackTrigger" checked /> expandNode 方法是否触发 callback<br/> 单个节点--[ <a id="expandBtn" href="#" title="不想展开我就不展开你..." "return false;">展开</a> ] [ <a id="collapseBtn" href="#" title="不想折叠我就不折叠你..." "return false;">折叠</a> ] [ <a id="toggleBtn" href="#" title="你想怎样？..." "return false;">展开 / 折叠 切换</a> ]<br/> 单个节点（包括子节点）--[ <a id="expandSonBtn" href="#" title="不想展开我就不展开你..." "return false;">展开</a> ] [ <a id="collapseSonBtn" href="#" title="不想折叠我就不折叠你..." "return false;">折叠</a> ]<br/> 全部节点--[ <a id="expandAllBtn" href="#" title="不管你有多NB，统统都要听我的！！" "return false;">展开</a> ] [ <a id="collapseAllBtn" href="#" title="不管你有多NB，统统都要听我的！！" "return false;">折叠</a> ]</p> <li><p><span class="highlight_red">使用 zTreeObj.expandNode 方法，详细请参见 API 文档中的相关内容</span><br/> collapse / expand log:<br/> <ul id="log" class="log"></ul></p> </li> </ul> </li> <li class="title"><h2>2、setting 配置信息说明</h2> <ul class="list"> <li class="highlight_red">事件回调函数的使用，详细请参见 API 文档中 setting.callback 的相关内容</li> <li class="highlight_red">如果需要调整 展开 / 折叠 的动画效果， 详细请参见 API 文档中 setting.view.expandSpeed 的相关内容</li> </ul> </li> <li class="title"><h2>3、treeNode 节点数据说明</h2> <ul class="list"> <li>对 节点数据 没有特殊要求，用户可以根据自己的需求添加自定义属性</li> </ul> </li> </ul> </div> </div> </BODY> </HTML>
