37zTree - 分页加载大数据量
程序员文章站
2024-03-22 12:12:46
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效果图：
代码：
<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE> ZTREE DEMO - big data page</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 = {
async: {
enable: true,
url: getUrl
},
check: {
enable: true
},
data: {
simpleData: {
enable: true
}
},
view: {
addDiyDom: addDiyDom
},
callback: {
beforeExpand: beforeExpand,
onAsyncSuccess: onAsyncSuccess,
onAsyncError: onAsyncError
}
};
var zNodes =[
{name:"分页测试", t:"请点击分页按钮", id:"1", count:2000, page:0, pageSize:100, isParent:true}
];
var curPage = 0;
function getUrl(treeId, treeNode) {
var param = "id="+ treeNode.id +"_"+treeNode.page +"&count="+treeNode.pageSize,
aObj = $("#" + treeNode.tId + "_a");
aObj.attr("title", "当前第 " + treeNode.page + " 页 / 共 " + treeNode.maxPage + " 页")
return "../asyncData/getNodesForBigData.php?" + param;
}
function goPage(treeNode, page) {
treeNode.page = page;
if (treeNode.page<1) treeNode.page = 1;
if (treeNode.page>treeNode.maxPage) treeNode.page = treeNode.maxPage;
if (curPage == treeNode.page) return;
curPage = treeNode.page;
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
zTree.reAsyncChildNodes(treeNode, "refresh");
}
function beforeExpand(treeId, treeNode) {
if (treeNode.page == 0) treeNode.page = 1;
return !treeNode.isAjaxing;
}
function onAsyncSuccess(event, treeId, treeNode, msg) {
}
function onAsyncError(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown) {
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
alert("异步获取数据出现异常。");
treeNode.icon = "";
zTree.updateNode(treeNode);
}
function addDiyDom(treeId, treeNode) {
if (treeNode.level>0) return;
var aObj = $("#" + treeNode.tId + "_a");
if ($("#addBtn_"+treeNode.id).length>0) return;
var addStr = "<span class='button lastPage' id='lastBtn_" + treeNode.id
+ "' title='last page' onfocus='this.blur();'></span><span class='button nextPage' id='nextBtn_" + treeNode.id
+ "' title='next page' onfocus='this.blur();'></span><span class='button prevPage' id='prevBtn_" + treeNode.id
+ "' title='prev page' onfocus='this.blur();'></span><span class='button firstPage' id='firstBtn_" + treeNode.id
+ "' title='first page' onfocus='this.blur();'></span>";
aObj.after(addStr);
var first = $("#firstBtn_"+treeNode.id);
var prev = $("#prevBtn_"+treeNode.id);
var next = $("#nextBtn_"+treeNode.id);
var last = $("#lastBtn_"+treeNode.id);
treeNode.maxPage = Math.round(treeNode.count/treeNode.pageSize - .5) + (treeNode.count%treeNode.pageSize == 0 ? 0:1);
first.bind("click", function(){
if (!treeNode.isAjaxing) {
goPage(treeNode, 1);
}
});
last.bind("click", function(){
if (!treeNode.isAjaxing) {
goPage(treeNode, treeNode.maxPage);
}
});
prev.bind("click", function(){
if (!treeNode.isAjaxing) {
goPage(treeNode, treeNode.page-1);
}
});
next.bind("click", function(){
if (!treeNode.isAjaxing) {
goPage(treeNode, treeNode.page+1);
}
});
};
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});
//-->
</SCRIPT>
<style type="text/css">
.ztree li span.button.firstPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -16px; vertical-align:top; *vertical-align:middle}
.ztree li span.button.prevPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -48px; vertical-align:top; *vertical-align:middle}
.ztree li span.button.nextPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -64px; vertical-align:top; *vertical-align:middle}
.ztree li span.button.lastPage {float:right; margin-left:2px; margin-right: 0; background-position:-144px -32px; vertical-align:top; *vertical-align:middle}
</style>
</HEAD>
<BODY>
<h1>分页加载大数据量</h1>
<h6>[ 文件路径: bigdata/page.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>1、大数据量加载说明</h2>
<ul class="list">
<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>
<li>2)、分页按钮通过自定义控件的方法实现。</li>
<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>
<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>
</li>
<li class="title"><h2>2、setting 配置信息说明</h2>
<ul class="list">
<li>需要设置 setting.async 异步加载部分的参数</li>
<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>
</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>