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How to get tabnavigator's selected viewstack

trudyhlittle asked
Last Modified: 2013-11-11
I am trying to implement a event listener when the user selects a tab on a tabnavigator that will change information elsewhere in the application depending what is currently selected.  The tab navigator contains 4 VBoxes.  Each VBox contains a linkBar that selects the appropriate viewstack item on the tab.  When the user selects a tab, I need to know which viewstack item is selected in the corresponding tab's Vbox.  I can get down as far as the selected VBox, but I can't seem to figure out how to get the label of the selected viewStack within the box.  Thanks.
<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"  creationComplete="init()" width="100%" >

	<mx:Style source="assets/skins/skins.css"/>

			import mx.controls.Alert;
			import events.*;
			import mx.events.ItemClickEvent;

			private function init():void {
			      tabNavigator.addEventListener(Event.CHANGE, tabChangedHander);
		     private function tabChangedHander(event:Event):void  
		   	 	//need to get the label of the selected tab's current viewstack item.
		  		var temp:String = tabNavigator.getChildAt(event.currentTarget.selectedIndex).name;
		  		Alert.show("Changed: " +temp, "Changed "+ temp);
			private function handleTabLinkBarClickEvent(event:ItemClickEvent):void
				var eNoBubble:ViewChangeEvent = new ViewChangeEvent(ViewChangeEvent.VIEWCHANGE,ViewChangeEvent.MAINTENANCE, false, event.label);
			public function handleViewChangeEvent(event:ViewChangeEvent):void {  
				var subView:String = event.subView;
				if (subView == 'Log') {
					tabNavigator.selectedIndex = 2;
					transactionsViewStack.selectedChild = viewTranLog;
				} else if (subView == 'Queue') {
					tabNavigator.selectedIndex = 2;
					transactionsViewStack.selectedChild = viewQueue;
				else if (subView == 'Errors') {
					tabNavigator.selectedIndex = 2;
					transactionsViewStack.selectedChild = viewErrors;
				else if (subView == 'Mappings') {
					tabNavigator.selectedIndex = 0;
				else if (subView =='Connections') {
					tabNavigator.selectedIndex = 0;
					maintenanceViewStack.selectedIndex = 2;
				else if (subView =='Upload') {
					tabNavigator.selectedIndex = 1;
					processingViewStack.selectedChild = upload;
				else if (subView =='Download') {
					tabNavigator.selectedIndex = 1;
					processingViewStack.selectedChild = download;
				else if (subView =='Simulation') {
					tabNavigator.selectedIndex = 1;
					processingViewStack.selectedChild = simulation;


<mx:Canvas  width="100%" height="100%"  >
		<mx:TabNavigator x="248" y="65" width="78%" height="90%" 
			paddingTop="0" horizontalGap="0" tabHeight="30" id="tabNavigator" creationPolicy="all">
			<mx:VBox label="Maintenance" backgroundColor="#2D5986" backgroundAlpha="1" 
				borderStyle="solid" borderThickness="0" id="maintVbox">
					<mx:LinkBar id="maintBar"
					            maxHeight="28" itemClick="handleTabLinkBarClickEvent(event)"/>
					<mx:ViewStack id="maintenanceViewStack" width="100%" height="100%"  >
						<mx:Canvas id="viewMappings" label="Mappings" icon="@Embed('assets/images/MappingsSmall.png')"/>
						<mx:Canvas id="viewXref" label="X-Reference" icon="@Embed('assets/images/XreferenceSmall.png')"/>
						<mx:Canvas id="viewConn" label="Connections" icon="@Embed('assets/images/ConnectionsSmall.png')"/>
						<mx:Canvas id="viewSecurity" label="Security" icon="@Embed('assets/images/SecuritySmall.png')"/>
			<mx:VBox label="Processing" backgroundColor="#2D5986" backgroundAlpha="1"
				 borderStyle="solid" borderThickness="0" id="procVBox">
				<mx:LinkBar id="processBar"
					            maxHeight="28" itemClick="handleTabLinkBarClickEvent(event)" />
						<mx:ViewStack id="processingViewStack" width="100%" height="100%">
							<mx:Canvas id="simulation" label="Simulation" icon="@Embed('assets/images/SimulationSmall.png')" />
							<mx:Canvas id="upload" label="Upload" icon="@Embed('assets/images/UploadSmall.png')" />
							<mx:Canvas id="download" label="Download" icon="@Embed('assets/images/DownloadSmall.png')" />
			<mx:VBox label="Transactions" backgroundColor="#2D5986" backgroundAlpha="1" 
				borderStyle="solid" borderThickness="0" verticalScrollPolicy="off" id="tranVbox"
				<mx:LinkBar id="transBar"
					            maxHeight="28" itemClick="handleTabLinkBarClickEvent(event)"   />
					<mx:ViewStack id="transactionsViewStack" width="100%" height="100%"  >
						<mx:Canvas id="viewQueue" label="Queue" icon="@Embed('assets/images/QueueSmall.png')" />
						<mx:Canvas id="viewTranLog" label="Log" icon="@Embed('assets/images/LogSmall.png')" />
						<mx:Canvas id="viewErrors" label="Errors" icon="@Embed('assets/images/ErrorsSmall.png')" />
			<mx:VBox label="Reports" backgroundColor="#2D5986" backgroundAlpha="1" 
				borderStyle="solid" borderThickness="0" id="repVbox">
				<mx:LinkBar id="reportsBar"
					            maxHeight="28" itemClick="handleTabLinkBarClickEvent(event)"/>
					<mx:ViewStack id="reportViewStack" width="100%" height="100%"  >
						<mx:Canvas id="report1" label="Report 1" icon="@Embed('assets/images/QueueSmall.png')" />
						<mx:Canvas id="report2" label="Report 2" icon="@Embed('assets/images/LogSmall.png')" />
						<mx:Canvas id="report3" label="Report 3" icon="@Embed('assets/images/ErrorsSmall.png')" />

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