Flex 自定义DataGrid实现根据条目某一属性值改变背景颜色

package czgh.components {
    import flash.display.Sprite;
    import mx.controls.DataGrid;
    import mx.core.UIComponent;

    public class OptionalDataGrid extends DataGrid {
        private var _rowColorFunction:Function;
        private var _customed:Boolean;
        private var _customerColor:uint=0;

        public function OptionalDataGrid() {
            super();
        }

        override protected function drawRowBackground(s:Sprite, rowIndex:int, y:Number, height:Number, color:uint, dataIndex:int):void {
            color=0XFFFFFF;
            if(this._rowColorFunction != null) {
                if (dataIndex < this.dataProvider.length) {
                    var item:Object=this.dataProvider.getItemAt(dataIndex);
                    color=this._rowColorFunction.call(this, item, color);
                }
            }
            super.drawRowBackground(s, rowIndex, y, height, color, dataIndex);
        }

        override protected function drawHeaderBackground(headerBG:UIComponent):void {
            headerBG.setStyle("borderVisible","false");
        }

        public function set rowColorFunction(rowColorFunction:Function):void {
            this._rowColorFunction=rowColorFunction;
        }

        public function get rowColorFunction():Function {
            return this._rowColorFunction;
        }
    }
}

// 如果act的值小于stand，就把这一行的底色设成浅蓝色，否则就保留默认颜色
private function setCustomColor(item:Object, color:uint):uint {
    if (Number(item["act"])

这样一来，你就有了一个可以根据数据自动变色的DataGrid，非常实用。