Flex4 ContextMenu() not showing added Items - apache-flex

Question

I am trying to use ContextMenu() to display context menus in Flex 4.
Full Render code here http://pastebin.com/Kx8tJ1cY
The problem is that the context menu does not change when I add items to it.
Can anyone show me how to add a custom right click menu to a List box in flex (without using external JS, just using ContextMenu as Adobe intended.
Please and Thank you
Craig

Answer 1

I found the problem/solution. You cant use context menus if there are Vboxes or Tab Navigators. Which is insane because it means I cant do relative layout properly or decent variable width design.
Quoted from: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/ui/ContextMenu.html
For example, if a DataGrid control is a child of a TabNavigator or VBox container, the DataGrid control cannot have its own context menu.

Answer 2

Have you tried setting the contextMenu property of the List to you context menu? FlexExamples has a similar example posted for the DataGrid component. A List shouldn't be too different.
Something along these lines:
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/08/20/using-a-custom-context-menu-with-the-flex-datagrid-control/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white"
creationComplete="init()">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
[Bindable]
private var cm:ContextMenu;
private var alert:Alert;
private function init():void {
var cmi:ContextMenuItem = new ContextMenuItem("View item...", true);
cmi.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, contextMenuItem_menuItemSelect);
cm = new ContextMenu();
cm.hideBuiltInItems();
cm.customItems = [cmi];
cm.addEventListener(ContextMenuEvent.MENU_SELECT, contextMenu_menuSelect);
}
private function contextMenu_menuSelect(evt:ContextMenuEvent):void {
dataGrid.selectedIndex = lastRollOverIndex;
}
private function contextMenuItem_menuItemSelect(evt:ContextMenuEvent):void {
var obj:Object = dataGrid.selectedItem;
alert = Alert.show("Property A: " + obj.#propertyA + "\\n" + "Property B: " + obj.#propertyB, obj.#label, Alert.OK);
}
]]>
</mx:Script>
<mx:XML id="itemsXML">
<items>
<item label="Item 1" data="i001" propertyA="Item 1.A" propertyB="Item 1.B" />
<item label="Item 2" data="i002" propertyA="Item 2.A" propertyB="Item 2.B" />
<item label="Item 3" data="i003" propertyA="Item 3.A" propertyB="Item 3.B" />
<item label="Item 4" data="i004" propertyA="Item 4.A" propertyB="Item 4.B" />
<item label="Item 5" data="i005" propertyA="Item 5.A" propertyB="Item 5.B" />
<item label="Item 6" data="i006" propertyA="Item 6.A" propertyB="Item 6.B" />
<item label="Item 7" data="i007" propertyA="Item 7.A" propertyB="Item 7.B" />
<item label="Item 8" data="i008" propertyA="Item 8.A" propertyB="Item 8.B" />
</items>
</mx:XML>
<mx:Number id="lastRollOverIndex" />
<mx:DataGrid id="dataGrid"
width="400"
dataProvider="{itemsXML.item}"
contextMenu="{cm}"
itemRollOver="lastRollOverIndex = event.rowIndex">
<mx:columns>
<mx:DataGridColumn id="labelCol"
dataField="#label"
headerText="Label:" />
<mx:DataGridColumn id="propACol"
dataField="#propertyA"
headerText="Property A:" />
<mx:DataGridColumn id="propBCol"
dataField="#propertyB"
headerText="Property B:" />
</mx:columns>
</mx:DataGrid>
<mx:Label text="{dataGrid.selectedItem.#label}" />
</mx:Application>