创建自定义排序DataGrid控件的例子(读取xml)

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white" viewSourceURL="srcview/index.html">
<mx:Script>
<!--[CDATA[
import mx.collections.SortField;
import mx.collections.Sort;
import mx.controls.dataGridClasses.DataGridColumn;
import mx.utils.ObjectUtil;
private function sortOld():void {
var sortField:SortField = new SortField();
sortField.compareFunction = test2_compareFunc;
sortField.descending = checkBox.selected;
var oldSort:Sort = new Sort();
oldSort.fields = [sortField];
xmlListColl.sort = oldSort;
xmlListColl.refresh();
}
private function sortNew():void {
var sortField:SortField = new SortField();
sortField.compareFunction = test3_compareFunc;
sortField.descending = checkBox.selected;
var sort:Sort = new Sort();
sort.fields = [sortField];
xmlListColl.sort = sort;
xmlListColl.refresh();
}
private function resetSort():void {
xmlListColl.sort = null;
xmlListColl.refresh();
}
private function dataGridCol_labelFunc(item:XML, col:DataGridColumn):String
{
//(@name == col.dataField)的代码的作用是筛选
return item.*.(@name == col.dataField).text();
}
private function test2_compareFunc(itemA:XML, itemB:XML):int {
var valueA:String = itemA.test2.text();
var valueB:String = itemB.test2.text();
return ObjectUtil.stringCompare(valueA, valueB);
}
private function test3_compareFunc(itemA:XML, itemB:XML):int {
var valueA:String = itemA.test3.text();
var valueB:String = itemB.test3.text();
return ObjectUtil.stringCompare(valueA, valueB);
}
]]-->
</mx:Script>
<mx:XML id="tests" source="tests.xml" />
<mx:XMLListCollection id="xmlList