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发表于 2005 年 12 月 19 日 19:44:13
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[转]js练习“树”,读取xml数据(无层次,结构简单),兼容ie&mf
最近看到大家都练习写树,偶也学习学习写了一个,大家多多批评,我好进步,呵呵
不过我看了一些树的xml文档都是在xml中就已经有了树的结构,所以我写了一个xml文档不用分层,来生成树的,不过要给每个节点定义编号和父编号
写得有点糙,大家不要笑话,以后逐渐学习在改进
演示地址: www.lapuasi.com/javascript/xmltree
使用方法:
var tree = new xmlTree('tree'); //生成对象
tree.mode = 1; //设置初始模式,默认全部关闭。0全部关闭,1全部展开
tree.createTree(); //输出树
Javascript代码:- /*
- xmlTree v1.1
- =================================
- Infomation
- ----------------------
- Author : Lapuasi
- E-Mail : [email]lapuasi@gmail.com[/email]
- WebSite : [url]http://www.lapuasi.com/javascript[/url]
- DateTime : 2005-12-14
- Example
- ----------------------
- var tree = new xmlTree('tree'); //生成对象
- tree.mode = 1; //设置初始模式,默认全部关闭。0全部关闭,1全部展开
- tree.createTree(); //输出树
- for Internet Explorer, Mozilla Firefox
- */
- function xmlTree(name) {
- this.name = name; //实例名称
- this.xmlFile = 'xmltree.xml'; //默认xml文件
- this.iconPath = 'images/' //默认图标路径
- this.iconFolder = 'tree_icon_folder.gif'; //默认文件夹图标
- this.iconFile = 'tree_icon_file.gif'; //默认文件图标
- this.iconOpen = 'tree_arrow_open.gif'; //默认箭头展开图标
- this.iconOver = 'tree_arrow_over.gif'; //默认箭头活动图标
- this.iconClose = 'tree_arrow_close.gif'; //默认箭头关闭图标
- this.mode = 0; //初始模式,默认全部关闭。0全部关闭,1全部展开
- this.html = ''; //最终输出html代码
- this.prevTip = null; //上一次被显示的tip的时间编号 (内部使用)
- this.prevSelected = null; //上一次被选中的节点的自动编号 (内部使用)
- }
- xmlTree.prototype.createXMLDOM = function() { //生成XMLDOM对象
- var xmldom;
- if (window.ActiveXObject){
- var xmldom = new ActiveXObject("Microsoft.XMLDOM");
- } else {
- if (document.implementation && document.implementation.createDocument) {
- var xmldom = document.implementation.createDocument("","doc",null);
- }
- }
- xmldom.async = false;
- xmldom.resolveExternals = false;
- xmldom.validateOnParse = false;
- xmldom.preserveWhiteSpace = true;
- return xmldom;
- }
- xmlTree.prototype.createTree = function() { //生成并打印
- var xmldom = this.createXMLDOM();
- document.write('<div id="tree">Loading...<\/div>'); // 树所用层
- document.write('<div id="treeTip"><\/div>'); //提示所用层
- document.getElementById('treeTip').style.visibility = 'visible';
- document.getElementById('treeTip').style.display = 'none';
- if (xmldom.load(this.xmlFile)) {
- this.createNodes(xmldom);
- } else {
- this.html = 'Load XML Error';
- }
- document.getElementById('tree').innerHTML = this.html;
- return;
- }
- xmlTree.prototype.getFirstChildData = function(obj, name) { //取得指定名称节点的第一个子节点的数据
- var result = '';
- if (typeof(obj) == 'object' && name != null && name != '') {
- var node = obj.getElementsByTagName(name);
- if (node != null && node.length > 0) {
- result = node[0].firstChild.data;
- }
- }
- return result;
- }
- xmlTree.prototype.checkChildNodes = function(obj, id) { //检测是否有分支
- var result = false;
- var nodes = obj.getElementsByTagName('node');
- if (nodes != null && nodes.length > 0) {
- var pid;
- for (var i = 0; i < nodes.length; i++) {
- pid = parseInt(nodes[i].getAttribute('parentid'));
- if (isNaN(pid)) pid = 0;
- if (!isNaN(pid) && pid == id) {
- result = true;
- break;
- }
- }
- }
- return result;
- }
- xmlTree.prototype.createNodes = function(obj, id) { //生成指定编号节点的树
- if (typeof(id) == 'undefined' || isNaN(parseInt(id))) id = 0;
- var nodes = obj.getElementsByTagName('node');
- if (nodes != null && nodes.length > 0) {
- var modeClass, modeSrc, iconClass, iconSrc;
- var nid, npid, nname, nicon, nlink, nexplain, hasChildNodes;
-
- //判断模式类型,并应用样式
- modeClass = 'close';
- modeSrc = this.iconPath + this.iconClose;
- if (this.mode == 1) {
- modeSrc = this.iconPath + this.iconOpen;
- modeClass = 'open';
- }
- if (parseInt(id) == 0) modeClass = 'open';
- this.html += '<ul id="tree_' + id + '_c" class="' + modeClass + '">';
- for (var i = 0; i < nodes.length; i++) {
- npid = parseInt(nodes[i].getAttribute('parentid'));
- if (isNaN(npid)) npid = 0;
- if (npid == id) {
- //初始化
- modeClass = 'close'; iconClass = 'icon-file'; iconSrc = this.iconPath + this.iconFile;
- //取得节点编号并检测
- nid = parseInt(nodes[i].getAttribute('id'));
- if (isNaN(nid)) break;
- this.html += '<li id="tree_' + nid + '"><span onclick="' + this.name + '.action(this,event);" onmouseover="' + this.name + '.action(this,event);" onmouseout="' + this.name + '.action(this,event);">';
-
- //取得节点自定义图标
- //判断是否含有子节点,并确定箭头和图标的图片及样式
- nicon = this.getFirstChildData(nodes[i], 'icon');
- hasChildNodes = this.checkChildNodes(obj, nid);
- if (hasChildNodes) {
- iconClass = '';
- iconSrc = this.iconPath + this.iconFolder;
- this.html += '<img id="tree_' + nid + '_a" src="' + modeSrc + '" class="arrow" \/>'; //箭头
- }
- if (nicon != '') iconSrc = nicon;
- this.html += '<img id="tree_' + nid + '_i" src="' + iconSrc + '" class="' + iconClass + '" \/>'; //图标
- //取得节点名称,连接,说明
- nname = this.getFirstChildData(nodes[i], 'name');
- nlink = this.getFirstChildData(nodes[i], 'link');
- nexplain = this.getFirstChildData(nodes[i], 'explain');
- if (nexplain != '') {
- nexplain = '\'' + nexplain + '\'';
- nexplain = 'onmouseover="' + this.name + '.treeTips(' + nexplain + ');window.status = \'\';return true;" onmouseout="' + this.name + '.treeTips();"'
- }
- this.html += '<a id="tree_' + nid + '_l" href="#" onclick="' + this.name + '.action(this,event);" ' + nexplain + '>' + nname + '<\/a><\/span>';
- //obj.documentElement.removeChild(nodes[i]);
- if (hasChildNodes) this.createNodes(obj, nid); //迭代子节点
- this.html += '<\/li>';
- }
- }
- this.html += '<\/ul>';
- }
- return;
- }
- xmlTree.prototype.action = function(obj, e) { //节点操作
- e = e ? e : (window.event ? window.event : null); //获取操作类型
- e = e.type;
- if (obj.tagName == 'A') {
- try { this.prevSelected.className = '';}
- catch(e) {}
- this.prevSelected = obj;
- obj.className = 'selected';
- }
- if (obj.tagName == 'SPAN') {
- var arrow = obj.firstChild; //取得箭头对象
- var borther = obj;
- while (borther.tagName != 'UL') { //取得分支对象
- borther = borther.nextSibling;
- if (borther == null) break;
- }
- if (borther != null) {
- switch (e) { //检测操作类型并执行相应代码
- case 'click':
- if (borther.className == 'open') {
- borther.className = 'close';
- arrow.src = this.iconPath + this.iconClose;
- } else {
- borther.className = 'open';
- arrow.src = this.iconPath + this.iconOpen;
- }
- break;
- case 'mouseover':
- if (arrow.tagName == 'IMG' && borther.className == 'close') {
- arrow.src = this.iconPath + this.iconOver;
- }
- break;
- case 'mouseout':
- if (arrow.tagName == 'IMG' && borther.className == 'close') {
- arrow.src = this.iconPath + this.iconClose;
- }
- break;
- }
- }
- }
- return;
- }
- xmlTree.prototype.treeTips = function(msg) { //提示栏
- if (this.prevTip != null) clearTimeout(this.prevTip);
- var obj = document.getElementById('treeTip');
- if (obj != null) {
- if (this.treeTips.arguments.length < 1) { // hide
- obj.style.display = 'none';
- } else { // show
- obj.innerHTML = msg;
- this.prevTip = setTimeout('document.getElementById("treeTip").style.display = "block"',300);
- document.onmousemove = this.moveToMouseLoc;
- }
- }
- return;
- }
- xmlTree.prototype.moveToMouseLoc = function(e) { //移动到鼠标所在位置
- var obj = document.getElementById('treeTip');
- if (obj != null) {
- var offsetX = -10, offsetY = 20;
- var x = 0, y = 0;
- if (window.event) {
- x = event.x + document.body.scrollLeft;
- y = event.y + document.body.scrollTop;
- } else {
- x = e.pageX;
- y = e.pageY;
- }
- obj.style.left = x + offsetX + 'px';
- obj.style.top = y + offsetY + 'px';
- }
- return;
- }
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xml 数据:- <?xml version="1.0" encoding="utf-8"?>
- <!--
- CODE BY Lapuasi.com [2005-12-14]
- Explain:
- ===================================================
- node 为树的一个节点,具有以下属性和内容
- 属性
- id: 编号,如果不唯一,只取第一个,其余被忽略 (必须)
- parentid: 父编号,没有则为父节点 (可选)
- 内容
- name: 名称 (必须)
- link: 连接 (可选)
- icon: 图标 (可选)
- explain: 说明 (可选)
- -->
- <root>
- <node id="1">
- <name>我的电脑</name>
- <icon>images/tree_icon_computer.gif</icon>
- <explain>显示连接到此计算机的驱动器和硬件</explain>
- </node>
- <node id="2" parentid="1">
- <name>硬盘驱动器 (C:)</name>
- <icon>images/tree_icon_driver.gif</icon>
- </node>
- <node id="3">
- <name>网上邻居</name>
- <icon>images/tree_icon_net.gif</icon>
- <explain>显示到网站,网络计算机和FTP站点的快捷方式</explain>
- </node>
- <node id="4" parentid="1">
- <name>硬盘驱动器 (D:)</name>
- <icon>images/tree_icon_driver.gif</icon>
- </node>
- <node id="5" parentid="2">
- <name>Windows</name>
- </node>
- <node id="6" parentid="3">
- <name>menu6</name>
- </node>
- <node id="7" parentid="3">
- <name>menu7</name>
- </node>
- <node id="8" parentid="3">
- <name>menu8</name>
- </node>
- <node id="9" parentid="7">
- <name>menu9</name>
- </node>
- <node id="10">
- <name>回收站</name>
- <icon>images/tree_icon_recycler.gif</icon>
- <explain>包含您已经删除的文件和文件夹</explain>
- </node>
- <node id="11" parentid="5">
- <name>system32</name>
- </node>
- <node id="12" parentid="11">
- <name>system.dll</name>
- </node>
- <node id="13" parentid="7">
- <name>menu13</name>
- </node>
- <node id="14" parentid="1">
- <name>DVD 驱动器</name>
- <icon>images/tree_icon_cdrom.gif</icon>
- </node>
- </root>
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