<!DOCTYPE html>
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<HTML>
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<HEAD>
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<TITLE> ZTREE DEMO - big data page</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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async: {
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enable: true,
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url: getUrl
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},
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check: {
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enable: true
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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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view: {
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addDiyDom: addDiyDom
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},
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callback: {
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beforeExpand: beforeExpand,
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onAsyncSuccess: onAsyncSuccess,
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onAsyncError: onAsyncError
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}
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};
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var zNodes =[
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{name:"分页测试", t:"请点击分页按钮", id:"1", count:2000, page:0, pageSize:100, isParent:true}
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];
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var curPage = 0;
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function getUrl(treeId, treeNode) {
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var param = "id="+ treeNode.id +"_"+treeNode.page +"&count="+treeNode.pageSize,
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aObj = $("#" + treeNode.tId + "_a");
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aObj.attr("title", "当前第 " + treeNode.page + " 页 / 共 " + treeNode.maxPage + " 页")
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return "../asyncData/getNodesForBigData.php?" + param;
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}
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function goPage(treeNode, page) {
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treeNode.page = page;
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if (treeNode.page<1) treeNode.page = 1;
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if (treeNode.page>treeNode.maxPage) treeNode.page = treeNode.maxPage;
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if (curPage == treeNode.page) return;
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curPage = treeNode.page;
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var zTree = $.fn.zTree.getZTreeObj("treeDemo");
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zTree.reAsyncChildNodes(treeNode, "refresh");
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}
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function beforeExpand(treeId, treeNode) {
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if (treeNode.page == 0) treeNode.page = 1;
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return !treeNode.isAjaxing;
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}
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function onAsyncSuccess(event, treeId, treeNode, msg) {
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}
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function onAsyncError(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown) {
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var zTree = $.fn.zTree.getZTreeObj("treeDemo");
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alert("异步获取数据出现异常。");
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treeNode.icon = "";
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zTree.updateNode(treeNode);
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}
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function addDiyDom(treeId, treeNode) {
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if (treeNode.level>0) return;
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var aObj = $("#" + treeNode.tId + "_a");
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if ($("#addBtn_"+treeNode.id).length>0) return;
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var addStr = "<span class='button lastPage' id='lastBtn_" + treeNode.id
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+ "' title='last page' onfocus='this.blur();'></span><span class='button nextPage' id='nextBtn_" + treeNode.id
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+ "' title='next page' onfocus='this.blur();'></span><span class='button prevPage' id='prevBtn_" + treeNode.id
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+ "' title='prev page' onfocus='this.blur();'></span><span class='button firstPage' id='firstBtn_" + treeNode.id
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+ "' title='first page' onfocus='this.blur();'></span>";
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aObj.after(addStr);
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var first = $("#firstBtn_"+treeNode.id);
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var prev = $("#prevBtn_"+treeNode.id);
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var next = $("#nextBtn_"+treeNode.id);
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var last = $("#lastBtn_"+treeNode.id);
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treeNode.maxPage = Math.round(treeNode.count/treeNode.pageSize - .5) + (treeNode.count%treeNode.pageSize == 0 ? 0:1);
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first.bind("click", function(){
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if (!treeNode.isAjaxing) {
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goPage(treeNode, 1);
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}
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});
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last.bind("click", function(){
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if (!treeNode.isAjaxing) {
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goPage(treeNode, treeNode.maxPage);
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}
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});
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prev.bind("click", function(){
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if (!treeNode.isAjaxing) {
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goPage(treeNode, treeNode.page-1);
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}
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});
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next.bind("click", function(){
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if (!treeNode.isAjaxing) {
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goPage(treeNode, treeNode.page+1);
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}
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});
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};
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$(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 span.button.firstPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -16px; vertical-align:top; *vertical-align:middle}
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.ztree li span.button.prevPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -48px; vertical-align:top; *vertical-align:middle}
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.ztree li span.button.nextPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -64px; vertical-align:top; *vertical-align:middle}
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.ztree li span.button.lastPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -32px; vertical-align:top; *vertical-align:middle}
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</style>
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</HEAD>
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<BODY>
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<h1>分页加载大数据量</h1>
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<h6>[ 文件路径: bigdata/page.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>1、大数据量加载说明</h2>
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<ul class="list">
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<li>1)、分页方案可以有效解决某一级节点数据超大的情况。</li>
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<li>2)、分页按钮通过自定义控件的方法实现。</li>
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<li class="highlight_red">3)、分页方案对于 checkbox 的关联关系无能为力，只能每次翻页后进行修正。由于时间关系，Demo 中不对 checkbox 的关联进行任何修正处理。</li>
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<li class="highlight_red">4)、分页方案中，从 zTree 得到的节点数据只有当前页的节点数据，可以在每次翻页后自行保存每页的数据，作为缓存，具体情况要根据实际需求来决定。</li>
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</li>
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<li class="title"><h2>2、setting 配置信息说明</h2>
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<ul class="list">
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<li>需要设置 setting.async 异步加载部分的参数</li>
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<li>其他不需要进行特殊的配置，根据自己的需求自行设置</li>
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</ul>
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</li>
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<li class="title"><h2>3、treeNode 节点数据说明</h2>
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<ul class="list">
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<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>
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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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