air/samples/tasks/js/ListLoader.js

   1 /*\r
   2  * Ext JS Library 0.30\r
   3  * Copyright(c) 2006-2009, Ext JS, LLC.\r
   4  * licensing@extjs.com\r
   5  * \r
   6  * http://extjs.com/license\r
   7  */\r
   8 \r
   9 ListLoader = function(config){\r
  10         Ext.apply(this, config);\r
  11 };\r
  12 \r
  13 Ext.extend(ListLoader, Ext.util.Observable, {\r
  14         keyAttribute: 'id',\r
  15         keyField: 'parentId',\r
  16         \r
  17         load: function(node, callback){\r
  18                 var key = this.keyField;\r
  19                 var v = node.attributes[this.keyAttribute];\r
  20                 var rs = this.store.queryBy(function(r){\r
  21                         return r.data[key] === v;\r
  22                 });\r
  23                 node.beginUpdate();\r
  24         for (var i = 0, d = rs.items, len = d.length; i < len; i++) {\r
  25                         var n = this.createNode(d[i]);\r
  26                         if (n) {\r
  27                                 node.appendChild(n);\r
  28                         }\r
  29                 }\r
  30                 node.endUpdate();\r
  31                 if(typeof callback == "function"){\r
  32             callback(this, node);\r
  33         }\r
  34         },\r
  35         \r
  36         createNode : function(record){\r
  37                 var d = record.data, n;\r
  38                 if(d.isFolder){\r
  39                         n = new Ext.tree.AsyncTreeNode({\r
  40                                 loader: this,\r
  41                                 id: record.id,\r
  42                                 text: d.listName,\r
  43                                 leaf: false,\r
  44                                 iconCls: 'icon-folder',\r
  45                                 editable: true,\r
  46                                 expanded: true,\r
  47                                 isFolder: true\r
  48                         });\r
  49                 }else{\r
  50                         n = new Ext.tree.TreeNode({\r
  51                                 id: record.id,\r
  52                                 text: d.listName,\r
  53                                 leaf: true,\r
  54                                 iconCls: 'icon-list',\r
  55                                 editable: true\r
  56                         });\r
  57                 }\r
  58                 return n;\r
  59         }\r
  60 });