Add and remove event handlers

           

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<!-- optimize/RemoveSomeListeners.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"
    creationComplete="initApp(event)">
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <fx:Script> 
        private function initApp(e:Event):void { 
            b2.addEventListener("click",myClickHandler); 
            b3.addEventListener("click",myClickHandler); 
        } 
        private function destroyButtons(e:Event):void { 
            b2.removeEventListener("click",myClickHandler); 
            b3.removeEventListener("click",myClickHandler); 
            myVGroup.removeAllElements(); 
        } 
        private function myClickHandler(e:Event):void { 
            // Do something here. 
        } 
      </fx:Script>
    <s:Panel title="VGroup with child controls">
        <s:VGroup id="myVGroup" height="100" width="125">
            <s:Button id="b1" label="Hurley" click="myClickHandler(event)" />
            <s:Button id="b2" label="Jack" />
            <s:Button id="b3" label="Sawyer" />
        </s:VGroup>
    </s:Panel>
    <s:Button id="myButton" click="destroyButtons(event)" label="Destroy Buttons" />
</s:Application>

Related examples in the same category

1.	Using event object to make event handlers more generic
2.	Creating function and use it as event handler
3.	A function returning String and use it in button event handler
4.	Register handler function to Button control
5.	Remove handler
6.	Conditional handler
7.	Use the handler property to specify the function Argument String
8.	Use the handlerFunction property to specify the function
9.	Add handlers and then remove handlers
10.	Using ActionScript in MXML event handlers
11.	Specify Event object as a parameter in the event handler function
12.	Define an event handler inline and binds a call to the handler function to the control
13.	Event handler function
14.	Parent container's click handler disables the target control after the target handles the event
15.	Handler children clicked event from parent clicked event
16.	Priority parameter and event handler event
17.	Add itself to event handler
18.	To use the Event object, you specify it as a parameter in the event handler function
19.	Create two event handler functions
20.	Bind a call to the handler function to the control that triggers the event
21.	Simple Event Handler
22.	Pass string into event handler
23.	Use initialize event to register event handler
24.	Event handler sequence
25.	Use SetEventHandler to set event handler to a target
26.	Add SecurityErrorEvent.SECURITY_ERROR event handler
27.	Write simple event handler code inline
28.	Add event handler to ChangeWatcher
29.	Use itemDoubleClick event handler to display HitData information
30.	Event Object Handler
31.	Define variable in click event handler
32.	Handler result event and fault event for ItemResponder
33.	Using removeEventListener() method to remove event handler
34.	Gets the value of the current target's x, y, and width properties in the focusIn event handler,
35.	Define an event handler for the drag
36.	Creates the groups in ActionScript by using an event handler

Add and remove event handlers : Event Handler « Event « Flex

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