Remove and add event listener

      

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" width="100%"
    height="100%" layout="vertical">
    <mx:Script>
        
        import mx.controls.Alert;
        [Bindable]
        public var labelText:String = "Label before event";
        
        public function clickFunction(event:Event):void
        {
            var message:String = "you clicked me! " + event.target.label;
            Alert.show(message,"Event Test");
        }
        public function addMyEvent():void
        {
            if (myButton.hasEventListener(MouseEvent.MOUSE_OVER)) {
                myButton.removeEventListener(MouseEvent.MOUSE_OVER,changeLabel);
                myInput.text = "Event was Removed";
                addEventButton.label ="Click this button to add event";
                myLabel.text = "Mouse over Event listener removed";
            } else {
                myButton.addEventListener(MouseEvent.MOUSE_OVER,changeLabel);
                myInput.text = "Event was added";
                addEventButton.label ="Click this button to remove event";
            }
        }
        public function changeLabel(event:MouseEvent):void
        {
            myLabel.text = "Mouse over";
        }
      
    </mx:Script>
    <mx:Button id="addEventButton" label="click this button to add listener" click="addMyEvent()"/>
    <mx:Button id="myButton" label="Click button!" click="clickFunction(event)"/>
    <mx:Label id="myInput"/>
    <mx:Label id="myLabel" text="{labelText}"/>
</mx:Application>

1.	Add Click event listener with ActionScript
2.	Register one listener function to two different buttons
3.	Custom Listener Function
4.	Use the addEventListener() method
5.	Pass individual properties to an event listener
6.	Use a separate call to addEventListener() method for each instance
7.	Event listener is contained in an ActionScript function in an tag
8.	Event listener function
9.	Reuse a single listener for multiple events
10.	Use addEventListener function to bind function to event
11.	Add a click event listener to each of the colored boxes
12.	Using Add Event Listener

Remove and add event listener : Event Listener « Event « Flex

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