MultiGroupingStore/MultiGoupingView 用户扩展的 Ext JS 问题

Question

我遇到了 MultiGroupingView 扩展的问题，该扩展用于对网格数据进行多级分组...我正在使用发布的版本 在此线程上。问题是，每当我将鼠标移到生成的网格上的任何行上时，FireBug 上都会出现此错误：

gs[i].id.split("gp-")[1] 未定义
第 435 行 MultiGroupingView.js

我无法理解为什么会发生这种情况。这是我正在使用的js代码：

/*
* Ext JS Library 2.2.1
* Copyright(c) 2006-2009, Ext JS, LLC.
* [email protected]
*
* http://extjs.com/license
*/

Ext.onReady(function(){

  Ext.QuickTips.init();

  var xg = Ext.grid;

  // shared reader
  var reader = new Ext.data.ArrayReader({}, [
     {name: 'company'},
     {name: 'price', type: 'float'},
     {name: 'change', type: 'float'},
     {name: 'pctChange', type: 'float'},
     {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'},
     {name: 'industry'},
     {name: 'desc'}
  ]);

  var grid = new xg.GridPanel({
      //This is definition of MultiGroupingStore
       store: new Ext.ux.MultiGroupingStore({
          reader: reader,
          data: xg.dummyData,
          sortInfo:{field: 'company', direction: "ASC"},
          groupField:['industry','lastChange']
      }),

      columns: [
          {id:'company',header: "Company", width: 60, sortable: true, dataIndex: 'company'},
          {header: "Price", width: 20, sortable: true, renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
          {header: "Change", width: 20, sortable: true, dataIndex: 'change', renderer: Ext.util.Format.usMoney},
          {header: "Industry", width: 20, sortable: true, dataIndex: 'industry'},
          {header: "Last Updated", width: 20, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
      ],

       //This is definition of MultiGroupingView
       view: new Ext.ux.MultiGroupingView({
                hideGroupedColumn : true
          ,     forceFit                : true
          ,     emptyGroupText          : 'All grouped fields empty!'
          ,     startCollapsed          : true
          ,     groupTextTpl            : '{gvalue}'// ({[values.rs.length]} {[values.rs.length > 1 ? "Items" : "Item"]})'
          ,     displayFieldSeparator: ', '
      }),

      frame:true,
      width: 700,
      height: 450,
      collapsible: true,
      animCollapse: false,
      title: 'Grouping Example',
      iconCls: 'icon-grid',
      renderTo: document.body
  });
});

// Array data for the grids
Ext.grid.dummyData = [
  ['3m Co',71.72,0.02,0.03,'4/2 12:00am', 'Manufacturing'],
  ['Alcoa Inc',29.01,0.42,1.47,'4/1 12:00am', 'Manufacturing'],
  ['Altria Group Inc',83.81,0.28,0.34,'4/3 12:00am', 'Manufacturing'],
  ['American Express Company',52.55,0.01,0.02,'4/8 12:00am', 'Finance'],
  ['American International Group, Inc.',64.13,0.31,0.49,'4/1 12:00am', 'Services'],
  ['AT&T Inc.',31.61,-0.48,-1.54,'4/8 12:00am', 'Services'],
  ['Boeing Co.',75.43,0.53,0.71,'4/8 12:00am', 'Manufacturing'],
  ['Caterpillar Inc.',67.27,0.92,1.39,'4/1 12:00am', 'Services'],
  ['Citigroup, Inc.',49.37,0.02,0.04,'4/4 12:00am', 'Finance'],
  ['E.I. du Pont de Nemours and Company',40.48,0.51,1.28,'4/1 12:00am', 'Manufacturing'],
  ['Exxon Mobil Corp',68.1,-0.43,-0.64,'4/3 12:00am', 'Manufacturing'],
  ['General Electric Company',34.14,-0.08,-0.23,'4/3 12:00am', 'Manufacturing'],
  ['General Motors Corporation',30.27,1.09,3.74,'4/3 12:00am', 'Automotive'],
  ['Hewlett-Packard Co.',36.53,-0.03,-0.08,'4/3 12:00am', 'Computer'],
  ['Honeywell Intl Inc',38.77,0.05,0.13,'4/3 12:00am', 'Manufacturing'],
  ['Intel Corporation',19.88,0.31,1.58,'4/2 12:00am', 'Computer'],
  ['International Business Machines',81.41,0.44,0.54,'4/1 12:00am', 'Computer'],
  ['Johnson & Johnson',64.72,0.06,0.09,'4/2 12:00am', 'Medical'],
  ['JP Morgan & Chase & Co',45.73,0.07,0.15,'4/2 12:00am', 'Finance'],
  ['McDonald\'s Corporation',36.76,0.86,2.40,'4/2 12:00am', 'Food'],
  ['Merck & Co., Inc.',40.96,0.41,1.01,'4/2 12:00am', 'Medical'],
  ['Microsoft Corporation',25.84,0.14,0.54,'4/2 12:00am', 'Computer'],
  ['Pfizer Inc',27.96,0.4,1.45,'4/8 12:00am', 'Services', 'Medical'],
  ['The Coca-Cola Company',45.07,0.26,0.58,'4/1 12:00am', 'Food'],
  ['The Home Depot, Inc.',34.64,0.35,1.02,'4/8 12:00am', 'Retail'],
  ['The Procter & Gamble Company',61.91,0.01,0.02,'4/1 12:00am', 'Manufacturing'],
  ['United Technologies Corporation',63.26,0.55,0.88,'4/1 12:00am', 'Computer'],
  ['Verizon Communications',35.57,0.39,1.11,'4/3 12:00am', 'Services'],
  ['Wal-Mart Stores, Inc.',45.45,0.73,1.63,'4/3 12:00am', 'Retail'],
  ['Walt Disney Company (The) (Holding Company)',29.89,0.24,0.81,'4/1 12:00am', 'Services'] ];

// add in some dummy descriptions
for(var i = 0; i < Ext.grid.dummyData.length; i++){
     Ext.grid.dummyData[i].push('Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Sed metus nibh, sodales a, porta at, vulputate eget, dui. Pellentesque ut nisl. Maecenas tortor turpis, interdum non, sodales non, iaculis ac, lacus. Vestibulum auctor, tortor quis iaculis malesuada, libero lectus bibendum purus, sit amet tincidunt quam turpis vel lacus. In pellentesque nisl non sem. Suspendisse nunc sem, pretium eget, cursus a, fringilla vel, urna.<br/><br/>Aliquam commodo ullamcorper erat. Nullam vel justo in neque porttitor laoreet. Aenean lacus dui, consequat eu, adipiscing eget, nonummy non, nisi. Morbi nunc est, dignissim non, ornare sed, luctus eu, massa. Vivamus eget quam. Vivamus tincidunt diam nec urna. Curabitur velit.'); }

这是MultiGroupingView类的相关部分：

Ext.ux.MultiGroupingView = Ext.extend(Ext.grid.GroupingView, {

     [. . . . . . .]

  /** Should return an array of all elements that represent a row, it should bypass
  *  all grouping sections
  */
  getRows: function() {
      var r = [];
      // This function is called many times, so use a cache if it is available
      if (this.rowsCache) {
          r = this.rowsCache;
          //console.debug('View.getRows: cached');
      } else {
          //console.debug('View.getRows: calculate');
          if (!this.enableGrouping) {
              r = Ext.grid.GroupingView.superclass.getRows.call(this);
          } else {
              var groupField = this.getGroupField();
              var g, gs = this.getGroups();
              // this.getGroups() contains an array of DIVS for the top level groups
              //console.debug("Get Rows", groupField, gs);

              r = this.getRowsFromGroup(r, gs, groupField[groupField.length - 1]);
          }
          // Clone the array, but not the objects in it
          if (r.length >= 0) {
              // Don't cache if there is nothing there, as this happens during a refresh
              //@TODO comment this to disble caching, incase of problems
              //this.rowsCache = r;
          } // else  
          //console.debug("No Rows to Cache!");
      }
      //console.debug("View.getRows: Found ", r.length, " rows",r[0]);
      //console.trace();
      return r;
  },
  /** Return array of records under a given group
  * @param r Record array to append to in the returned object
  * @param gs Grouping Sections, an array of DIV element that represent a set of grouped records
  * @param lsField The name of the grouping section we want to count
  */
  getRowsFromGroup: function(r, gs, lsField) {
      var rx = new RegExp(".*-gp-" + lsField + "-.*");
      for (var i = 0, len = gs.length; i < len; i++) {

          if (gs[i].id != "") {
              if (gs[i].id.split('gp-')[1].split('-')[0] == lsField) {
                  g = gs[i].childNodes[1].childNodes;
                  for (var j = 0, jlen = g.length; j < jlen; j++) {

                      r[r.length] = g[j];
                  }
              }
              else {
                  r = this.getRowsFromGroup(r, gs[i].childNodes, lsField);
              }
          }
      }
      return r;
  }


  /** Override the onLoad, as it always scrolls to the top, we only
  *  want to do this for an initial load or reload. There is a new event registered in
  *  the constructor to do this    
  */
 , onLoad: function() { }
 });

最后，这是html文件：

<html>
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
  <title>Grid3 Grouping Example</title>

  <link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />

  <!-- GC -->
    <!-- LIBS -->
    <script type="text/javascript" src="../../adapter/ext/ext-base.js"></script>
    <!-- ENDLIBS -->

  <script type="text/javascript" src="../../ext-all.js"></script>


  <script type="text/javascript" src="grouping.js"></script>
  <script type="text/javascript" src="MultiGroupingStore.js"></script>
  <script type="text/javascript" src="MultiGroupingView.js"></script>
  <link rel="stylesheet" type="text/css" href="grid-examples.css" />

  <!-- Common Styles for the examples -->
  <link rel="stylesheet" type="text/css" href="../shared/examples.css" />

  <style type="text/css">
      body .x-panel {
          margin-bottom:20px;
      }
      .icon-grid {
          background-image:url(../shared/icons/fam/grid.png) !important;
      }
      #button-grid .x-panel-body {
          border:1px solid #99bbe8;
          border-top:0 none;
      }
      .add {
          background-image:url(../shared/icons/fam/add.gif) !important;
      }
      .option {
          background-image:url(../shared/icons/fam/plugin.gif) !important;
      }
      .remove {
          background-image:url(../shared/icons/fam/delete.gif) !important;
      }
      .save {
          background-image:url(../shared/icons/save.gif) !important;
      }
  </style>
</head>
<body>
<script type="text/javascript" src="../shared/examples.js"></script><!-- EXAMPLES -->
<h1>GridView3 Grouping</h1>
<p>Note that the js is not minified so it is readable. See <a href="grouping.js">grouping.js</a>.</p>

</body>
</html>

关于如何解决这个问题有什么想法吗？