Adds a second click handler to call the logAction() method, depending on CheckBox control
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" initialize="initApp(event)">
<mx:Script>
import mx.controls.Alert;
private function initApp(e:Event):void {
cb1.addEventListener(MouseEvent.CLICK, handleCheckBoxChange);
b1.addEventListener(MouseEvent.CLICK, logAction);
}
private function handleCheckBoxChange(e:Event):void {
if (cb1.selected) {
b1.addEventListener(MouseEvent.CLICK, logAction);
ta1.text += "added log listener" + "\n";
} else {
b1.removeEventListener(MouseEvent.CLICK, logAction);
ta1.text += "removed log listener" + "\n";
}
}
private function performAction(e:Event):void {
Alert.show("You performed the action");
}
private function logAction(e:Event):void {
ta1.text += "Action performed: " + e.type + "\n";
}
</mx:Script>
<mx:Button label="Perform Action" id="b1" click="performAction(event)"/>
<mx:CheckBox id="cb1" label="Log?" selected="true"/>
<mx:TextArea id="ta1" height="200" width="300"/>
</mx:Application>
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