<!DOCTYPE html>
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<HTML>
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<HEAD>
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<TITLE> ZTREE DEMO - single path</TITLE>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link rel="stylesheet" href="../../../css/demo.css" type="text/css">
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<link rel="stylesheet" href="../../../css/zTreeStyle/zTreeStyle.css" type="text/css">
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<script type="text/javascript" src="../../../js/jquery-1.4.4.min.js"></script>
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<script type="text/javascript" src="../../../js/jquery.ztree.core.js"></script>
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<!-- <script type="text/javascript" src="../../../js/jquery.ztree.excheck.js"></script>
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<script type="text/javascript" src="../../../js/jquery.ztree.exedit.js"></script>-->
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<SCRIPT type="text/javascript">
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<!--
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var setting = {
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view: {
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dblClickExpand: false,
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showLine: false
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},
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data: {
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simpleData: {
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enable: true
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}
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},
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callback: {
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beforeExpand: beforeExpand,
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onExpand: onExpand,
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onClick: onClick
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}
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};
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function createNodes(maxNodesNumInLevel, maxLevel, curLevel, curPId) {
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if (maxNodesNumInLevel<5) {
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maxNodesNumInLevel = 5;
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}
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var nodes = [], num = 0;
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while(num<3) {
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num = parseInt(Math.random()*1024)%maxNodesNumInLevel+1;
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}
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for (var i=0; i<num; i++) {
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var id = curPId ? curPId + "-" + i : "" + i, isParent = (parseInt(Math.random()*9999)%3!=0),
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node = {id: id, pId : curPId, name : "N" + id};
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nodes.push(node);
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if (isParent && curLevel<maxLevel) {
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nodes = nodes.concat(createNodes(maxNodesNumInLevel, maxLevel, curLevel+1, id));
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}
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}
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return nodes;
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}
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var zNodes =createNodes(5, 5, 0);
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var curExpandNode = null;
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function beforeExpand(treeId, treeNode) {
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var pNode = curExpandNode ? curExpandNode.getParentNode():null;
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var treeNodeP = treeNode.parentTId ? treeNode.getParentNode():null;
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var zTree = $.fn.zTree.getZTreeObj("treeDemo");
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for(var i=0, l=!treeNodeP ? 0:treeNodeP.children.length; i<l; i++ ) {
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if (treeNode !== treeNodeP.children[i]) {
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zTree.expandNode(treeNodeP.children[i], false);
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}
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}
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while (pNode) {
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if (pNode === treeNode) {
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break;
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}
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pNode = pNode.getParentNode();
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}
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if (!pNode) {
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singlePath(treeNode);
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}
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}
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function singlePath(newNode) {
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if (newNode === curExpandNode) return;
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var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
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rootNodes, tmpRoot, tmpTId, i, j, n;
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if (!curExpandNode) {
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tmpRoot = newNode;
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while (tmpRoot) {
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tmpTId = tmpRoot.tId;
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tmpRoot = tmpRoot.getParentNode();
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}
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rootNodes = zTree.getNodes();
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for (i=0, j=rootNodes.length; i<j; i++) {
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n = rootNodes[i];
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if (n.tId != tmpTId) {
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zTree.expandNode(n, false);
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}
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}
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} else if (curExpandNode && curExpandNode.open) {
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if (newNode.parentTId === curExpandNode.parentTId) {
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zTree.expandNode(curExpandNode, false);
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} else {
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var newParents = [];
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while (newNode) {
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newNode = newNode.getParentNode();
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if (newNode === curExpandNode) {
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newParents = null;
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break;
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} else if (newNode) {
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newParents.push(newNode);
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}
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}
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if (newParents!=null) {
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var oldNode = curExpandNode;
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var oldParents = [];
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while (oldNode) {
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oldNode = oldNode.getParentNode();
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if (oldNode) {
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oldParents.push(oldNode);
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}
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}
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if (newParents.length>0) {
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zTree.expandNode(oldParents[Math.abs(oldParents.length-newParents.length)-1], false);
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} else {
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zTree.expandNode(oldParents[oldParents.length-1], false);
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}
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}
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}
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}
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curExpandNode = newNode;
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}
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function onExpand(event, treeId, treeNode) {
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curExpandNode = treeNode;
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}
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function onClick(e,treeId, treeNode) {
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var zTree = $.fn.zTree.getZTreeObj("treeDemo");
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zTree.expandNode(treeNode, null, null, null, true);
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}
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$(document).ready(function(){
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$.fn.zTree.init($("#treeDemo"), setting, zNodes);
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});
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//-->
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</SCRIPT>
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<style type="text/css">
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.ztree li button.switch {visibility:hidden; width:1px;}
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.ztree li button.switch.roots_docu {visibility:visible; width:16px;}
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.ztree li button.switch.center_docu {visibility:visible; width:16px;}
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.ztree li button.switch.bottom_docu {visibility:visible; width:16px;}
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</style>
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</HEAD>
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<BODY>
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<h1>保持展开单一路径</h1>
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<h6>[ 文件路径: super/singlepath.html ]</h6>
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<div class="content_wrap">
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<div class="zTreeDemoBackground left">
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<ul id="treeDemo" class="ztree"></ul>
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</div>
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<div class="right">
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<ul class="info">
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<li class="title"><h2>实现方法说明</h2>
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<ul class="list">
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<li>此 Demo 是在 "单击展开/折叠节点" 基础上改造而来，树节点保持始终只展开一条路径。</li>
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<li class="highlight_red">利用 setting.callback.beforeExpand / onExpand 事件回调函数实现展开规则</li>
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</ul>
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</li>
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</ul>
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</div>
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</div>
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</BODY>
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</HTML>
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