gistfile1.txt

//#define MEM_CORRECT

using System;
using System.Drawing;
using MonoMac.Foundation;
using MonoMac.AppKit;
using MonoMac.ObjCRuntime;

namespace MenuDelTest
{
	public partial class AppDelegate : NSApplicationDelegate
	{
		MainWindowController mainWindowController;
#if MEM_CORRECT
		MyMenuDel del;
#endif

		public AppDelegate ()
		{
		}

		public override void DidFinishLaunching (NSNotification notification)
		{
			mainWindowController = new MainWindowController ();
			mainWindowController.Window.MakeKeyAndOrderFront (this);


			NSMenuItem newMenuItem = new NSMenuItem ("some menu");
			NSMenu myMenu = new NSMenu ("Menu Under Test");
			newMenuItem.Submenu = myMenu;

			NSMenuItem item1 = myMenu.AddItem ("On the fly menu", null, "");
			NSMenu onTheFlyMenu = new NSMenu ("On the fly menu");
#if MEM_CORRECT
			del = new MyMenuDel ();
			onTheFlyMenu.Delegate = del;
#else
			onTheFlyMenu.Delegate = new MyMenuDel ();
#endif
			item1.Submenu = onTheFlyMenu;

			NSApplication.SharedApplication.MainMenu.AddItem (newMenuItem);

			NSButton b = new NSButton (new RectangleF (0, 0, 50, 50));
			b.Activated += HandleActivated;
			mainWindowController.Window.ContentView.AddSubview (b);
		}

		void HandleActivated (object sender, EventArgs e)
		{
			GC.Collect (2);
		}
	}

	public partial class MyMenuDel : NSMenuDelegate
	{

		public override void MenuWillHighlightItem (NSMenu menu, NSMenuItem item)
		{
		}
			
		public override void MenuWillOpen (NSMenu menu)
		{

		}
	}
}