学习Flex几个值得研究的例程代码

//uses the first product node to define the columns
private function getColumnDefArray():Array
{
    //Alert.show("colcount:" + xmlCatalog.toXMLString());
    var aColumns:Array = new Array();
    var node0:XML = xmlCatalog.product[0];                          //get the first "product" node
    var xlColumns:XMLList = node0.children();                        //get its child nodes (columns) as an XMLList
    var xmlColumn:XML
    var oColumnDef:Object;
    for (var i:int=0;i<xlColumns.length();i++)  {                    //loop over the xmlList
      xmlColumn = xlColumns[i];
      oColumnDef = new Object();
      oColumnDef.dataField = xmlColumn.localName();                  //make the dataField be the node name
      switch (oColumnDef.dataField)  {                              //conditional column property logic
        case "name":
          oColumnDef.width = 80;
          oColumnDef.sortable = false;
          oColumnDef.visible = true;
          oColumnDef.editable = false;
          oColumnDef.wordWrap = false;        
          break;
        case "description":
          oColumnDef.width = 200;
          oColumnDef.sortable = false;
          oColumnDef.visible = true;
          oColumnDef.editable = false;
          oColumnDef.wordWrap = true;        
          break;
        case "price":
          oColumnDef.width = 40;
          oColumnDef.sortable = true;
          oColumnDef.visible = true;
          oColumnDef.editable = true;
          oColumnDef.wordWrap = false;         
          break;
        case "image":
          oColumnDef.width = 100;
          oColumnDef.sortable = false;
          oColumnDef.visible = false;
          oColumnDef.editable = false;
          oColumnDef.wordWrap = false;        
          break;
        default:
          oColumnDef.width = 50;
          oColumnDef.sortable = true;
          oColumnDef.visible = true;
          oColumnDef.editable = false;
          oColumnDef.wordWrap = false;         
          break;                           
      }
      aColumns.push(oColumnDef);
    }