[Mono-osx] Working with delegates

[flohei]

Hi guys,

thanks for all the detailed explanation on how to use the protocols.

I decided to go with the loosely typed approach to test it out first. I'm
not sure yet if I'll have to go strongly typed later on. So I tried to get
started with - (BOOL)windowShouldClose:(id)sender from the NSWindowDelegate
like this:

	[Export("windowShouldClose:")]
	public virtual bool WindowShouldClose (NSObject sender) {
		Console.WriteLine("WindowShouldClose");
		return true;
	}

In Objective-C I would have to set the window's delegate to self first, to
make this method get called whenever the window wants to close. So I added
the following to WindowDidLoad()

	Window.Delegate = this;

But after that the compiler tells me, that it cannot implicitly convert
MyWindowController to NSWindowDelegate. Yeah, sure. So why not just use 

	Window.WeakDelegate = this;?

This one throws no error at compile time but when I try to open the Window I
want to use this in my program crashes telling me "Method not found:
'MonoMac.AppKit.NSWindow.set_WeakDelegate'". So is there something I'm still
missing?

Thanks again
–f
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