diy_async.html 5.5 KB

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  1. <!DOCTYPE html>
  2. <HTML>
  3. <HEAD>
  4. <TITLE> ZTREE DEMO - big data async</TITLE>
  5. <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  6. <link rel="stylesheet" href="../../../css/demo.css" type="text/css">
  7. <link rel="stylesheet" href="../../../css/zTreeStyle/zTreeStyle.css" type="text/css">
  8. <script type="text/javascript" src="../../../js/jquery.min.js"></script>
  9. <!-- <script type="text/javascript" src="../../../js/jquery-1.4.4.min.js"></script>-->
  10. <script type="text/javascript" src="../../../js/jquery.ztree.core.js"></script>
  11. <script type="text/javascript" src="../../../js/jquery.ztree.excheck.js"></script>
  12. <script type="text/javascript" src="../../../js/jquery.ztree.exedit.js"></script>
  13. <SCRIPT type="text/javascript">
  14. <!--
  15. var setting = {
  16. async: {
  17. enable: true,
  18. url: getUrl
  19. },
  20. check: {
  21. enable: true
  22. },
  23. data: {
  24. simpleData: {
  25. enable: true
  26. }
  27. },
  28. view: {
  29. expandSpeed: ""
  30. },
  31. callback: {
  32. beforeExpand: beforeExpand,
  33. onAsyncSuccess: onAsyncSuccess,
  34. onAsyncError: onAsyncError
  35. }
  36. };
  37. var zNodes =[
  38. {name:"500个节点", id:"1", count:500, times:1, isParent:true},
  39. {name:"1000个节点", id:"2", count:1000, times:1, isParent:true},
  40. {name:"2000个节点", id:"3", count:2000, times:1, isParent:true}
  41. ];
  42. var log, className = "dark",
  43. startTime = 0, endTime = 0, perCount = 100, perTime = 100;
  44. function getUrl(treeId, treeNode) {
  45. var curCount = (treeNode.children) ? treeNode.children.length : 0;
  46. var getCount = (curCount + perCount) > treeNode.count ? (treeNode.count - curCount) : perCount;
  47. var param = "id="+treeNode.id+"_"+(treeNode.times++) +"&count="+getCount;
  48. return "../asyncData/getNodesForBigData.php?" + param;
  49. }
  50. function beforeExpand(treeId, treeNode) {
  51. if (!treeNode.isAjaxing) {
  52. startTime = new Date();
  53. treeNode.times = 1;
  54. ajaxGetNodes(treeNode, "refresh");
  55. return true;
  56. } else {
  57. alert("zTree 正在下载数据中,请稍后展开节点。。。");
  58. return false;
  59. }
  60. }
  61. function onAsyncSuccess(event, treeId, treeNode, msg) {
  62. if (!msg || msg.length == 0) {
  63. return;
  64. }
  65. var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
  66. totalCount = treeNode.count;
  67. if (treeNode.children.length < totalCount) {
  68. setTimeout(function() {ajaxGetNodes(treeNode);}, perTime);
  69. } else {
  70. treeNode.icon = "";
  71. zTree.updateNode(treeNode);
  72. zTree.selectNode(treeNode.children[0]);
  73. endTime = new Date();
  74. var usedTime = (endTime.getTime() - startTime.getTime())/1000;
  75. className = (className === "dark" ? "":"dark");
  76. showLog("[ "+getTime()+" ]&nbsp;&nbsp;treeNode:" + treeNode.name );
  77. showLog("加载完毕,共进行 "+ (treeNode.times-1) +" 次异步加载, 耗时:"+ usedTime + " 秒");
  78. }
  79. }
  80. function onAsyncError(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown) {
  81. var zTree = $.fn.zTree.getZTreeObj("treeDemo");
  82. alert("异步获取数据出现异常。");
  83. treeNode.icon = "";
  84. zTree.updateNode(treeNode);
  85. }
  86. function ajaxGetNodes(treeNode, reloadType) {
  87. var zTree = $.fn.zTree.getZTreeObj("treeDemo");
  88. if (reloadType == "refresh") {
  89. treeNode.icon = "../../../css/zTreeStyle/img/loading.gif";
  90. zTree.updateNode(treeNode);
  91. }
  92. zTree.reAsyncChildNodes(treeNode, reloadType, true);
  93. }
  94. function showLog(str) {
  95. if (!log) log = $("#log");
  96. log.append("<li class='"+className+"'>"+str+"</li>");
  97. if(log.children("li").length > 4) {
  98. log.get(0).removeChild(log.children("li")[0]);
  99. }
  100. }
  101. function getTime() {
  102. var now= new Date(),
  103. h=now.getHours(),
  104. m=now.getMinutes(),
  105. s=now.getSeconds(),
  106. ms=now.getMilliseconds();
  107. return (h+":"+m+":"+s+ " " +ms);
  108. }
  109. $(document).ready(function(){
  110. $.fn.zTree.init($("#treeDemo"), setting, zNodes);
  111. });
  112. //-->
  113. </SCRIPT>
  114. </HEAD>
  115. <BODY>
  116. <h1>分批异步加载大数据量</h1>
  117. <h6>[ 文件路径: bigdata/diy_async.html ]</h6>
  118. <div class="content_wrap">
  119. <div class="zTreeDemoBackground left">
  120. <ul>
  121. <li class="highlight_red">&nbsp;&nbsp;&nbsp;&nbsp;此 Demo 专门用于测试分批异步加载,每次展开节点都要重新进行异步加载。</li>
  122. </ul>
  123. <ul id="treeDemo" class="ztree"></ul>
  124. </div>
  125. <div class="right">
  126. <ul class="info">
  127. <li class="title"><h2>1、大数据量加载说明</h2>
  128. <ul class="list">
  129. <li>1)、对于某一级节点数多达几千个的时候,zTree 默认的延迟加载是无效的,此 Demo 演示了一种原先 zTree v2.6 时的分批加载节点的方法。</li>
  130. <li class="highlight_red">2)、此方法适用于1、2千个节点必须全部显示的需求。</li>
  131. <li class="highlight_red">3)、此方法并不能解决加载慢的问题,相反只会让最终结果出现的更慢,只是可以有限度的避免浏览器假死,而且显示的节点越多就越慢。</li>
  132. <li>4)、对于某一级节点数至少几千个的情况,另一个解决方案是:分页异步加载。<br/>
  133. async load log:<br/>
  134. <ul id="log" class="log" style="height:85px"></ul></li>
  135. </ul>
  136. </li>
  137. <li class="title"><h2>2、setting 配置信息说明</h2>
  138. <ul class="list">
  139. <li>需要设置 setting.async 异步加载部分的参数</li>
  140. <li>建议关闭动画效果 setting.view.expandSpeed = "";</li>
  141. <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>
  142. </ul>
  143. </li>
  144. <li class="title"><h2>3、treeNode 节点数据说明</h2>
  145. <ul class="list">
  146. <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>
  147. </ul>
  148. </li>
  149. </ul>
  150. </div>
  151. </div>
  152. </BODY>
  153. </HTML>