<!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-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 = {
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(" " + zNodes.length + " nodes are initialized, " + showNodeCount + " nodes generate the DOM object."
+ "\n\n Initialization zTree total time: " + (time2.getTime() - time1.getTime()) + " ms");
}
$(document).ready(function(){
ruler.init("ruler");
$("#createTree").bind("click", createTree);
});
//-->
</SCRIPT>
</HEAD>
<BODY>
<h1>One-time Large Data Loading</h1>
<h6>[ File Path: bigdata/common.html ]</h6>
<div class="content_wrap">
<div class="zTreeDemoBackground left">
<ul>
<li><span>Adjust the total number of nodes to the test load speed: </span>
<div id="ruler" class="ruler" title="can drag to adjust the number of nodes">
<div id="cursor" class="cursor">5000</div>
</div>
<div style="width:220px; text-align: center;">
<span>checkbox</span><input type="checkbox" id="showChk" title="whether to display checkbox" class="checkbox first" />
[ <a id="createTree" href="#" title="Initialize zTree" onclick="return false;">Initialize zTree</a> ]
</div>
</li>
</ul>
<ul id="treeDemo" class="ztree"></ul>
</div>
<div class="right">
<ul class="info">
<li class="title"><h2>1, Explanation of large data load</h2>
<ul class="list">
<li>1) zTree v3.x optimized for one-time large data loading capacity, using a lazy loading technique, which does not expand the node does not create child nodes of the DOM.</li>
<li class="highlight_red">2) If a maximum of 100 nodes each, but a total number of several thousand or even tens of thousands of nodes, and the parent node is collapsed by default to optimize the most obvious effect, very fast.</li>
<li class="highlight_red">3) For the next level there are thousands of sub-node case, the optimization of lazy loading is invalid, proposal to consider asynchronous page loading.</li>
<li class="highlight_red">4) if you set the data to all the parent nodes are expanded, the optimization of lazy loading is invalid, proposal to not expand all parent node when you initialize zTree.</li>
<li>5) set the display checkbox / radio will affect some of the performance.</li>
<li>6) DOM generated using addDiyDom function will affect the speed, the number of nodes determines the number of impact situations.</li>
<li>7) Using 'onNodeCreated' callback function to manipulate nodes object will affect the speed, the degree of influence determined by the number of nodes.</li>
</ul>
</li>
<li class="title"><h2>2, Explanation of setting</h2>
<ul class="list">
<li>No special configuration.</li>
</ul>
</li>
<li class="title"><h2>3, Explanation of treeNode</h2>
<ul class="list">
<li>No special requirements on the node data, the user can add custom attributes.</li>
</ul>
</li>
</ul>
</div>
</div>
</BODY>
</HTML>