singlepath.html
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<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE> ZTREE DEMO - single path</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-3.5.js"></script>
<!-- <script type="text/javascript" src="../../../js/jquery.ztree.excheck-3.5.js"></script>
<script type="text/javascript" src="../../../js/jquery.ztree.exedit-3.5.js"></script>-->
<SCRIPT type="text/javascript">
<!--
var setting = {
view: {
dblClickExpand: false,
showLine: false
},
data: {
simpleData: {
enable: true
}
},
callback: {
beforeExpand: beforeExpand,
onExpand: onExpand,
onClick: onClick
}
};
function createNodes(maxNodesNumInLevel, maxLevel, curLevel, curPId) {
if (maxNodesNumInLevel<5) {
maxNodesNumInLevel = 5;
}
var nodes = [], num = 0;
while(num<3) {
num = parseInt(Math.random()*1024)%maxNodesNumInLevel+1;
}
for (var i=0; i<num; i++) {
var id = curPId ? curPId + "-" + i : "" + i, isParent = (parseInt(Math.random()*9999)%3!=0),
node = {id: id, pId : curPId, name : "N" + id};
nodes.push(node);
if (isParent && curLevel<maxLevel) {
nodes = nodes.concat(createNodes(maxNodesNumInLevel, maxLevel, curLevel+1, id));
}
}
return nodes;
}
var zNodes =createNodes(5, 5, 0);
var curExpandNode = null;
function beforeExpand(treeId, treeNode) {
var pNode = curExpandNode ? curExpandNode.getParentNode():null;
var treeNodeP = treeNode.parentTId ? treeNode.getParentNode():null;
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
for(var i=0, l=!treeNodeP ? 0:treeNodeP.children.length; i<l; i++ ) {
if (treeNode !== treeNodeP.children[i]) {
zTree.expandNode(treeNodeP.children[i], false);
}
}
while (pNode) {
if (pNode === treeNode) {
break;
}
pNode = pNode.getParentNode();
}
if (!pNode) {
singlePath(treeNode);
}
}
function singlePath(newNode) {
if (newNode === curExpandNode) return;
if (curExpandNode && curExpandNode.open==true) {
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
if (newNode.parentTId === curExpandNode.parentTId) {
zTree.expandNode(curExpandNode, false);
} else {
var newParents = [];
while (newNode) {
newNode = newNode.getParentNode();
if (newNode === curExpandNode) {
newParents = null;
break;
} else if (newNode) {
newParents.push(newNode);
}
}
if (newParents!=null) {
var oldNode = curExpandNode;
var oldParents = [];
while (oldNode) {
oldNode = oldNode.getParentNode();
if (oldNode) {
oldParents.push(oldNode);
}
}
if (newParents.length>0) {
zTree.expandNode(oldParents[Math.abs(oldParents.length-newParents.length)-1], false);
} else {
zTree.expandNode(oldParents[oldParents.length-1], false);
}
}
}
}
curExpandNode = newNode;
}
function onExpand(event, treeId, treeNode) {
curExpandNode = treeNode;
}
function onClick(e,treeId, treeNode) {
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
zTree.expandNode(treeNode, null, null, null, true);
}
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});
//-->
</SCRIPT>
<style type="text/css">
.ztree li button.switch {visibility:hidden; width:1px;}
.ztree li button.switch.roots_docu {visibility:visible; width:16px;}
.ztree li button.switch.center_docu {visibility:visible; width:16px;}
.ztree li button.switch.bottom_docu {visibility:visible; width:16px;}
</style>
</HEAD>
<BODY>
<h1>保持展开单一路径</h1>
<h6>[ 文件路径: super/singlepath.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>实现方法说明</h2>
<ul class="list">
<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>
<li class="highlight_red">利用 setting.callback.beforeExpand / onExpand 事件回调函数实现展开规则</li>
</ul>
</li>
</ul>
</div>
</div>
</BODY>
</HTML>