flex实现DataGrid高亮显示数据功能的解决方案

package org.lxh 
{    
    import flash.display.Sprite; 
    import mx.controls.DataGrid; 
    public class SpecialDataGrid extends DataGrid 
    { 
        private var _rowColorFunction:Function;   //用于在外部能通过指定一个方法 去实现改变列的背景色 
        public function SpecialDataGrid() 
        { 
            super(); 
        } 
        public function set rowColorFunction(f:Function):void 
        { 
            this._rowColorFunction = f; 
        } 
        public function get rowColorFunction():Function 
        { 
            return this._rowColorFunction; 
        } 
        //复写该方法 
        override protected function drawRowBackground(s:Sprite,rowIndex:int,y:Number, height:Number, color:uint, dataIndex:int):void 
        { 
            if( this.rowColorFunction != null ){ 
                if( dataIndex                     var item:Object = this.dataProvider.getItemAt(dataIndex); 
                    color = this.rowColorFunction.call(this, item, color); 
                } 
            }            
            super.drawRowBackground(s, rowIndex, y, height, color, dataIndex); 
        } 
    } 
}

    private function colorFunction(item:Object, color:uint):uint 
    { 
                    var col:uint=0xe3eaf2; 
                    if(commonMsg.length > 0){ 
                        for(var i:int=0;i                            if(commonMsg.getItemAt(i).id==item.id){ 
                                col=0xF10026; 
                            } 
                        } 
                    } 
                    return col; 

    }