Swap main Flex application

private var mainModuleLogOnEventDispatcher:*;

[Bindable]
private var _logOnDetails:LogOnDetails = new LogOnDetails();

private function onCreationComplete(event:Event):void
{
	// Load log on module.
	loadMainModule("LogOnModule.swf");

	// Pre-load main module while user is logging on.
	var mm:IModuleInfo = ModuleManager.getModule("MainModule.swf");
	mm.load();
}

[Bindable]
private function set logOnDetails(value:LogOnDetails):void
{
	_logOnDetails = value;
}

private function get logOnDetails():LogOnDetails
{
	return _logOnDetails;
}

private function loadMainModule(moduleName:String):void
{
	// Unload anything already loaded.
	if (mainModule.url.length > 0)
	{
		mainModule.unloadModule();
		mainModule.url = "";
	}
	mainModule.addEventListener(ModuleEvent.READY, handleMainModuleReadyEvent);
	mainModule.url = moduleName;
}

private function handleMainModuleReadyEvent(event:ModuleEvent):void
{
	// Remove listener, we've caught the event now.
	mainModule.removeEventListener(ModuleEvent.READY, handleMainModuleReadyEvent);

	// Add listeners to other events or apply data.
	if (mainModule.url == "LogOnModule.swf")
	{
		mainModuleLogOnEventDispatcher = mainModule.child;
		if (mainModule.child != null) {
			mainModuleLogOnEventDispatcher.addEventListener("logOnEvent", handleLogOnEvent);
		}
	}
	if (mainModule.url == "MainModule.swf")
	{
		var mm:* = mainModule.child;
		if (mainModule.child != null)
		{
			mm.logOnDetails = logOnDetails;
		}
	}
}

private function handleLogOnEvent(logOnEvent:LogOnEvent):void
{
	mainModuleLogOnEventDispatcher.removeEventListener("logOnEvent", handleLogOnEvent);

	logOnDetails = logOnEvent.logOnDetails;

	// Now get person's details and swap in main module if successful.
 	var parameters:Object = new Object();
 	parameters.cmd = "viewPerson";
 	parameters.token = logOnDetails.logOnToken;
	viewPersonRequest.send(parameters);
}

private function handleViewPersonRequestResult(event:ResultEvent):void
{

	//*** Loads of setting logonDetails and error handling removed!!! ***//
	loadMainModule("MainModule.swf");
	currentState = "LoggedOn";
	return;
}

private function onLogOff(event:MouseEvent):void
{
	// Make sure we don't auto-logon when we log off.
	var logOnPrefs:SharedObject = SharedObject.getLocal("LogOn", "/");
	logOnPrefs.data.loggedOff = true;

	var parameters:Object = new Object();
	parameters.cmd = "logoff";
	parameters.token = logOnDetails.logOnToken;
	logoffRequest.send(parameters);
	loadMainModule("LogOnModule.swf");
	currentState = "";
}

<!-- *** Loads of view state related mxml removed *** -->
<mx:VBox width="100%" height="100%" horizontalAlign="center" verticalAlign="middle" id="mainModuleVBox">
	<basic:IJModuleLoader id="mainModule" url="" width="100%" height="100%" horizontalAlign="center" verticalAlign="middle"/>
</mx:VBox>

<mx:Application>
  <mx:ViewStack>
    <mx:Box> <!-- or whatever for login-->
    </mx:Box>
    <mx:Box> <!-- application UI widgets here -->
    </mx:Box>
  </mx:ViewStack>
</mx:Application>