问题描述

Flex combox icon怎么居中

<?xml version=""1.0"" encoding=""utf-8""?>
xmlns:s=""library://ns.adobe.com/flex/spark""
xmlns:mx=""library://ns.adobe.com/flex/mx"" minWidth=""955"" minHeight=""600""
creationComplete=""aaa()"">
fx:Declarations
<!-- Place non-visual elements (e.g. services value objects) here -->
/fx:Declarations

<fx:Script>    <![CDATA[        import mx.collections.ArrayCollection;        import mx.events.DropdownEvent;        [Bindable]        private var list:ArrayCollection = new ArrayCollection();        [Embed(source=""sts_located.gif"")]        private var aaaCls:Class;        [Embed(source=""sts_partial.gif"")]        private var bbbCls:Class;        [Embed(source=""sts_unfilled.gif"")]        private var cccCls:Class;        private function aaa():void{            list.addItem({data:""aaa""label:""aaa""});            list.addItem({data:""bbb""label:""bbb""});            list.addItem({data:""ccc""label:""ccc""});        }        protected function combobox1_openHandler(event:DropdownEvent):void        {            statusCombox.dropdown.iconFunction=getIcon;            statusCombox.dropdown.horizontalCenter=0;            statusCombox.dropdown.verticalCenter=0;        }        private function getIcon(item:Object):Class{            if(item.data==""aaa""){                return aaaCls;            }else if(item.data==""bbb""){                return bbbCls;            }else if(item.data==""ccc""){                return cccCls;            }else{                return null;            }        }    ]]></fx:Script><mx:ComboBox id=""statusCombox"" x=""198"" y=""97"" dataProvider=""{list}"" open=""combobox1_openHandler(event)""/>

/s:Application

如上，icon和text是不垂直对齐的，怎么才能对其