MainWindowController.cs

using System;
using MonoMac.Foundation;
using MonoMac.AppKit;

namespace PopOverSample
{
    public partial class MainWindowController : NSWindowController
	{
		#region Constructors
		// Called when created from unmanaged code
		public MainWindowController (IntPtr handle) : base (handle)
		{
			Initialize ();
		}
		// Called when created directly from a XIB file
		[Export ("initWithCoder:")]
		public MainWindowController (NSCoder coder) : base (coder)
		{
			Initialize ();
		}
		// Call to load from the XIB/NIB file
		public MainWindowController () : base ("MainWindow")
		{
			Initialize ();
		}
		// Shared initialization code
		void Initialize ()
		{
		
		}

		public override void WindowDidLoad ()
		{
			base.WindowDidLoad ();
			popOver.Delegate = new MyPopOverDelegate ();
		}

		public class MyPopOverDelegate: NSPopoverDelegate {
			public override void DidShow (NSNotification notification)
			{
				Console.WriteLine ("Popover displayed");
			} 

			public override void DidClose (NSNotification notification)
			{
				Console.WriteLine ("Popover closed");
			}
		}

		#endregion
		//strongly typed window accessor
		public new MainWindow Window {
			get {
				return (MainWindow)base.Window;
			}
		}

		partial void ShowPopOver (NSObject sender)
		{
			if (popOver.Shown) {
				popOver.Close();
				return;
			}

			NSButton button = (NSButton) sender;
			popOver.Show(button.Bounds, button, NSRectEdge.MaxYEdge);

		}
	}
}