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Ô­ÎÄ£ºHow to dispatch an event from a custom item renderer
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<!-- дÔÚij¸ö×é¼þÖÐ -->
<mx:metadata>[Event(name="myEvent")]</mx:metadata>
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<nw:somecomponent myEvent="onSomeEventHandler(event)"/>
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ÔÚ Flex Ó¦ÓóÌÐòÖÐн¨Ò»¸ö List ×é¼þ¡£È»ºóн¨Ò»¸ö°üº¬ÓÐ RadioButton µÄ×é¼þÓÃÓÚ List µÄ itemRenderer¡£µ±Óû§µ¥»÷ RadioButton ʱ£¬¿ÉÄÜÄã»áÏëÈÃËûµÄ¸¸×é¼þ List ²úÉúÒ»¸öʼþ¡£
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<!-- »á²úÉúÒ»¸ö±àÒëÆ÷´íÎó -->
<mx:list id="myList" dataprovider="{listData}"
       itemRenderer="uk.nwebb.CustomRenderer"
       myEvent="onSomeEventHandler(event)" />
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//дÔÚij¸ö×é¼þÖÐ
dispatchEvent("myEvent", true, true);

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dispatchEvent(new Event("myEvent", true, true));
ÏÖÔÚ List ×é¼þÈÔÈ»»¹ÊÇûÓÐ myEvent ÊôÐÔ¡£ÎªÁËÄÜÈà List ×é¼þ½ÓÊÕµ½ÉÏÃæ·ÖÅɵÄʼþ£¬ÎÒÃDZØÐëÈ·±£Õâ¸ö List ×é¼þÓÐ ID£¬È»ºó¿ÉÒÔÔÚ³õʼ»¯º¯Êý»òÕß creattionComplete º¯ÊýÖаó¶¨Ê¼þ£º
//дÔÚ´´½¨ List ×é¼þµÄÀàÖÐ
private function onInit():void
{
    myList.addEventListener("myEvent", myEventHandler);
}
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