Cannot remove the Image event listener

I'm clearly missing something and would be grateful for the help.  I'm trying to run an event handler when a full picture of loading, then remove the Manager so that it does not once again the image needs to be reloaded later.

The problem I'm having is that the event handler simple custom ' disappear, despite the call removeEventListener on the Image object.

The following example illustrates the problem (the example do anything useful... it's just the shortest example to demonstrate the problem).  (To run the application, you will need to provide any file JPEG ol ' named 'myImage.jpg' in the directory 'src' to your project).

What to expect to happen is:

(1) at startup, the image loads and runs of loadComplete().

2) loadComplete removes the event listener so that subsequent re-loads don't get re-triggers the Manager.  I want only the Manager to run once.

3) 'loadComplete' should appear in the debug console.

(4) a click on the button should display only 'change picture' in the debug console

What I get instead is that Manager loadComplete is not removed, and whenever I click on the button, loadComplete runs when the image is re-load (i.e., each button click results in the showing in the debug console 'change picture' AND 'loadComplete' ).

<? XML version = "1.0" encoding = "utf-8"? >
" < = xmlns:mx mx:Application ' http://www.Adobe.com/2006/MXML "layout ="absolute"> "
"<mx:Image width ="655"height ="181" source =" myImage.jpg" id ="MyImage" autoLoad ="true"="true"scaleContent complete =" loadComplete () " ="100"x ="100"/ >
< mx:Button = "100" x = "341" label = "Button" click = "click (event)" / >
< mx:Script >
<! [CDATA]
private void loadComplete(): void
{
trace ('loadComplete');
myImage.removeEventListener ("complete", loadComplete);
}
private void click(evt:Event):void
{
trace ("change Image");
myImage.load ("myImage.jpg");    Reload image even; This is just an example
}
[]] >
< / mx:Script >
< / mx:Application >

Hello

You can only remove event listeners you added with the addEventListener() method in an ActionScript block. You cannot remove an event listener that has been defined in the MXML tag, even if it has been registered by using a call to the addEventListener () method that was made within an attribute of the tag.

Check this page for reference.

http://livedocs.Adobe.com/Flex/3/HTML/Help.HTML?content=events_05.html

You can change the code a bit get it works



private function myImage_creationCompleteHandler(event:FlexEvent):void
{
     myImage.addEventListener("complete",myImage_completeHandler);
     myImage.load("myImage.jpg");
}

private function myImage_completeHandler(event:Event):void
{
     myImage.removeEventListener("complete",myImage_completeHandler);
}

Tags: Flex

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