Flex Spark RadioButton Deselected Event? -

is there way listen this? can listen click selects radiobutton, can't seem find way listen when radiobutton has been deselected.

any ideas?

thanks!

back in flex 2 days, "change" event triggered when radio button deselected. however, little convenience disappeared in flex 3, reason, , don't believe provided sort of replacement event.

handling events @ radiobuttongroup level fine , well, except there times when want handle events on radio button level -- particularly if hoping interact data provider entry via itemrenderer drawing radio button.

conveniently, have little bit of boilerplate code can use drop-in replacements radiobutton , radiobuttongroup provide "unselect" event @ radio button level. here smartradiobutton, first of all:

<?xml version="1.0" encoding="utf-8"?> <s:radiobutton xmlns:fx="http://ns.adobe.com/mxml/2009"                 xmlns:s="library://ns.adobe.com/flex/spark"                 xmlns:mx="library://ns.adobe.com/flex/mx">     <fx:script>         <![cdata[             import events.smartradiobuttonevent;              public function notifydeselect():void {                 dispatchevent(new smartradiobuttonevent('deselect'));             }         ]]>     </fx:script>      <fx:metadata>         [event(name="deselect", type="events.smartradiobuttonevent")]     </fx:metadata> </s:radiobutton> 

and here smartradiobuttongroup:

<?xml version="1.0" encoding="utf-8"?> <s:radiobuttongroup xmlns:fx="http://ns.adobe.com/mxml/2009"                      xmlns:s="library://ns.adobe.com/flex/spark"                      xmlns:mx="library://ns.adobe.com/flex/mx"                     change="selectionchanged();"                     >     <fx:script>         <![cdata[             import spark.components.radiobutton;              import components.smartradiobutton;              protected var oldselection:smartradiobutton = null;              // notify our old selection has been deselected, , update             // reference new selection.             public function selectionchanged():void {                 var newselection:smartradiobutton = this.selection smartradiobutton;                 if (oldselection == newselection) return;                 if (oldselection != null) {                     oldselection.notifydeselect();                 }                 oldselection = newselection;             }              // override properties make sure update oldselection correctly,             // in event of programmatic selection change.             override public function set selectedvalue(value:object):void {                 super.selectedvalue = value;                 oldselection = super.selection smartradiobutton;             }              override public function set selection(value:radiobutton):void {                 super.selection = value;                 oldselection = super.selection smartradiobutton;             }          ]]>     </fx:script> </s:radiobuttongroup> 

the 2 property overrides in there make sure correctly update oldselection, in event of programmatic change group's selection.

smartradiobuttonevent isn't fancy or important. plain event, since there isn't special payload.

i have tested above code, , works, there surely edge conditions, , other oddities should addressed, if it's used in larger system.