Use SetEventHandler to set event handler to a target

           


<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        
        import flash.events.Event;
        private function handlerBase():void {
            ta1.text = "handler 1";
        }
        private function handlerState1(event:Event):void {
            ta1.text ="handler 2.";
        }
        private function handlerState3(theString:String):void {
            ta1.text ="param: "+ theString;
        }
      
    </mx:Script>
    <mx:states>
        <mx:State name="State1">
            <mx:SetEventHandler target="{b1}" name="click" handlerFunction="handlerState1" />
            <mx:SetProperty target="{b1}" name="label" value="State 1" />
        </mx:State>
        <mx:State name="State2">
            <mx:SetEventHandler target="{b1}" name="click" handler="ta1.text='listener';" />
            <mx:SetProperty target="{b1}" name="label" value="State 2" />
        </mx:State>
        <mx:State name="State3">
            <mx:SetEventHandler target="{b1}" name="click" handler="handlerState3('my param');" />
            <mx:SetProperty target="{b1}" name="label" value="State 3" />
        </mx:State>
    </mx:states>
    <mx:Button id="b1" label="Click Me: Base State" click="handlerBase();" />
    <mx:TextArea id="ta1" height="100" width="50%" />
    <mx:Button label="state 1" click="currentState='State1';" />
    <mx:Button label="state 2" click="currentState='State2';" />
    <mx:Button label="state 3" click="currentState='State3';" />
    <mx:Button label="Start" click="currentState='';" />
</mx:Application>

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Use SetEventHandler to set event handler to a target : Event Handler « Event « Flex

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