Detect when context menu opens or closes

Question

Is there an easy way to detect when a (righ-click) context
menu is visible? I wish there was a "visible" property for the
Contextmenu class, but there isn't one.
I've tried to listen to events to know when the menu opens or
closes but it would seem as though there are far too many
(undocumented) events to take into account and some of the events
may be OS specific.
For example, the following 3 events cover much of the
scenarios of when the menu opens/closes...
cmMenu.addEventListener(ContextMenuEvent.MENU_SELECT,
onShow);
cmMenu.addEventListener(Event.DEACTIVATE, onHide);
stage.addEventListener(MouseEvent.MOUSE_DOWN, onHide);
But you can also click either the f10, alt, esc, or enter
keys to also close the menu. There could be other ways to close the
menu, but since it is not well documented, I can't be certain.
Too bad Event.CLOSE isn't dispatched when the menu closes.
If anyone knows of a resource that documents how to determine
when a context menu is opened or closed, please let me know.
thanks! :-)

Answer 1

Hello,
I'm also having problems with this topic.  I'm developing an AIR app that uses context menus, and I've noticed that if I bring up a context menu, mouse around it and highlight items, but DON'T select them (i.e. click off to close the menu) that the main application loses focus.  There seems to be an invisible window or something blocking mouse events, until I move the app or do a command-~ (I'm on a Mac...it's as if there are multiple open windows and this toggles them.)  Note that this only seems to happen in the exact sequence above - selecting an item or avoiding the items altogether after the menu pops up results in the correct (expected) behavior when the menu closes.
I'd like to be able to catch a close event of some kind for the context menu, and even better, find a way to prevent the problem described above.
Below is a very simple AIR app that will demonstrate the problem. (I'm compiling with Flex 3.4.1 framework and running it on Snow Leopard...)  Much thanks in advance to anyone who can help me with this problem!
-Chris
<mx:WindowedApplication layout="absolute" applicationComplete="init()"
xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
<![CDATA[
private function init():void {
// Listener to trace mouseX property
myCanvas.addEventListener(MouseEvent.MOUSE_MOVE,
function (e:MouseEvent):void {
trace(myCanvas.mouseX);
// Create a simple context menu
myCanvas.contextMenu= new ContextMenu();
myCanvas.contextMenu.addItem(new NativeMenuItem("test"));
]]>
</mx:Script>
<mx:Canvas id="myCanvas" height="50%" width="50%" backgroundColor="0x00FF00"/>
</mx:WindowedApplication>