Question

Trying to prevent the application from shutting down when clicked the X button, it still closing but the AIR process is running in the task manager. What wrong with the code?

Application Complete:

NativeApplication.nativeApplication.addEventListener(Event.EXITING, onExiting);

Closing code:

private function onExiting(e:Event):void
{
e.preventDefault();
}

Answer 1

Try Event.CLOSING. That’s what I use to cancel closing.

Event.EXITING happens after the window is removed and should be used only for cleanup, and not to prevent the application from closing.

From the docs:

On Windows, the only time you will get
the exiting event is after closing the
last window (when autoExit=true).

---

Sample “unclosable” application:

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
                       xmlns:s="library://ns.adobe.com/flex/spark" 
                       xmlns:mx="library://ns.adobe.com/flex/mx"
                       initialize="init()">
    <fx:Script>
        <![CDATA[
            import mx.controls.Alert;

            private function init():void{
                this.addEventListener(Event.CLOSING, function(e:Event):void{
                    e.preventDefault();
                    Alert.show('Unclosable!');
                });
            }
        ]]>
    </fx:Script>
</s:WindowedApplication>

Good luck,
Alin