qfqk-web.git - Gitblit

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			<!DOCTYPE html>
			<HTML>
			<HEAD>
			<TITLE> ZTREE DEMO - big data common</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 = {
			check: {
			enable: true
			},
			data: {
			simpleData: {
			enable: true
			}
			},
			callback: {
			onNodeCreated: onNodeCreated
			}
			};

			var dataMaker = function(count) {
			var nodes = [], pId = -1,
			min = 10, max = 90, level = 0, curLevel = [], prevLevel = [], levelCount,
			i = 0,j,k,l,m;

			while (i<count) {
			if (level == 0) {
			pId = -1;
			levelCount = Math.round(Math.random() * max) + min;
			for (j=0; j<levelCount && i<count; j++, i++) {
			var n = {id:i, pId:pId, name:"Big-" +i};
			nodes.push(n);
			curLevel.push(n);
			}
			} else {
			for (l=0, m=prevLevel.length; l<m && i<count; l++) {
			pId = prevLevel[l].id;
			levelCount = Math.round(Math.random() * max) + min;
			for (j=0; j<levelCount && i<count; j++, i++) {
			var n = {id:i, pId:pId, name:"Big-" +i};
			nodes.push(n);
			curLevel.push(n);
			}
			}
			}
			prevLevel = curLevel;
			curLevel = [];
			level++;
			}
			return nodes;
			}

			var ruler = {
			doc: null,
			ruler: null,
			cursor: null,
			minCount: 5000,
			count: 5000,
			stepCount:500,
			minWidth: 30,
			maxWidth: 215,
			init: function() {
			ruler.doc = $(document);
			ruler.ruler = $("#ruler");
			ruler.cursor = $("#cursor");
			if (ruler.ruler) {
			ruler.ruler.bind("mousedown", ruler.onMouseDown);

			}
			},
			onMouseDown: function(e) {
			ruler.drawRuler(e, true);
			ruler.doc.bind("mousemove", ruler.onMouseMove);
			ruler.doc.bind("mouseup", ruler.onMouseUp);
			ruler.doc.bind("selectstart", ruler.onSelect);
			$("body").css("cursor", "pointer");
			},
			onMouseMove: function(e) {
			ruler.drawRuler(e);
			return false;
			},
			onMouseUp: function(e) {
			$("body").css("cursor", "auto");
			ruler.doc.unbind("mousemove", ruler.onMouseMove);
			ruler.doc.unbind("mouseup", ruler.onMouseUp);
			ruler.doc.unbind("selectstart", ruler.onSelect);
			ruler.drawRuler(e);
			},
			onSelect: function (e) {
			return false;
			},
			getCount: function(end) {
			var start = ruler.ruler.offset().left+1;
			var c = Math.max((end - start), ruler.minWidth);
			c = Math.min(c, ruler.maxWidth);
			return {width:c, count:(c - ruler.minWidth)*ruler.stepCount + ruler.minCount};
			},
			drawRuler: function(e, animate) {
			var c = ruler.getCount(e.clientX);
			ruler.cursor.stop();
			if ($.browser.msie \|\| !animate) {
			ruler.cursor.css({width:c.width});
			} else {
			ruler.cursor.animate({width:c.width}, {duration: "fast",easing: "swing", complete:null});
			}
			ruler.count = c.count;
			ruler.cursor.text(c.count);
			}
			}
			var showNodeCount = 0;
			function onNodeCreated(event, treeId, treeNode) {
			showNodeCount++;
			}

			function createTree () {
			var zNodes = dataMaker(ruler.count);
			showNodeCount = 0;
			$("#treeDemo").empty();
			setting.check.enable = $("#showChk").attr("checked");
			var time1 = new Date();
			$.fn.zTree.init($("#treeDemo"), setting, zNodes);
			var time2 = new Date();

			alert("节点共 " + zNodes.length + " 个, 初始化生成 DOM 的节点共 " + showNodeCount + " 个"
			+ "\n\n 初始化 zTree 共耗时: " + (time2.getTime() - time1.getTime()) + " ms");
			}


			$(document).ready(function(){
			ruler.init("ruler");
			$("#createTree").bind("click", createTree);

			});
			//-->
			</SCRIPT>
			</HEAD>

			<BODY>
			<h1>一次性加载大数据量</h1>
			<h6>[ 文件路径: bigdata/common.html ]</h6>
			<div class="content_wrap">
			<div class="zTreeDemoBackground left">
			<ul>
			<li><span>调整总节点数，测试加载速度：</span>
			<div id="ruler" class="ruler" title="拖拽可调整节点数">
			<div id="cursor" class="cursor">5000</div>
			</div>
			<div style="width:220px; text-align: center;">
			<span>checkbox</span><input type="checkbox" id="showChk" title="是否显示 checkbox" class="checkbox first" />
			[ <a id="createTree" href="#" title="初始化 zTree" onclick="return false;">初始化 zTree</a> ]
			</div>
			</li>
			</ul>
			<ul id="treeDemo" class="ztree"></ul>
			</div>
			<div class="right">
			<ul class="info">
			<li class="title"><h2>1、大数据量加载说明</h2>
			<ul class="list">
			<li>1)、zTree v3.x 针对大数据量一次性加载进行了更深入的优化，实现了延迟加载功能，即不展开的节点不创建子节点的 DOM。</li>
			<li class="highlight_red">2)、对于每级节点最多一百左右，但总节点数几千甚至几万，且不是全部展开的数据，一次性加载的效果最明显，速度非常快。</li>
			<li class="highlight_red">3)、对于某一级节点数就多达几千的情况延迟加载无效，这种情况建议考虑分页异步加载。</li>
			<li class="highlight_red">4)、对于全部节点都展开显示的情况，延迟加载无效，这种情况建议不要全部展开。</li>
			<li>5)、显示 checkbox / radio 会造成一定程度的性能下降。</li>
			<li>6)、利用 addDiyDom 功能增加自定义控件会影响速度，影响程度受节点数量而定。</li>
			<li>7)、利用 onNodeCreated 事件回调函数对节点 DOM 进行操作会影响速度，影响程度受节点数量而定。</li>
			</ul>
			</li>
			<li class="title"><h2>2、setting 配置信息说明</h2>
			<ul class="list">
			<li>不需要进行特殊的配置</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>