// This file was generated by the Gtk# code generator.
// Any changes made will be lost if regenerated.

namespace GtkSharp {

	using System;
	using System.Runtime.InteropServices;

#region Autogenerated code
	internal delegate void CallbackNative(IntPtr widget, IntPtr data);

	internal class CallbackInvoker {

		CallbackNative native_cb;
		IntPtr __data;
		GLib.DestroyNotify __notify;

		~CallbackInvoker ()
		{
			if (__notify == null)
				return;
			__notify (__data);
		}

		internal CallbackInvoker (CallbackNative native_cb) : this (native_cb, IntPtr.Zero, null) {}

		internal CallbackInvoker (CallbackNative native_cb, IntPtr data) : this (native_cb, data, null) {}

		internal CallbackInvoker (CallbackNative native_cb, IntPtr data, GLib.DestroyNotify notify)
		{
			this.native_cb = native_cb;
			__data = data;
			__notify = notify;
		}

		internal Gtk.Callback Handler {
			get {
				return new Gtk.Callback(InvokeNative);
			}
		}

		void InvokeNative (Gtk.Widget widget)
		{
			native_cb (widget == null ? IntPtr.Zero : widget.Handle, __data);
		}
	}

	internal class CallbackWrapper {

		public void NativeCallback (IntPtr widget, IntPtr data)
		{
			try {
				managed (GLib.Object.GetObject(widget) as Gtk.Widget);
				if (release_on_call)
					gch.Free ();
			} catch (Exception e) {
				GLib.ExceptionManager.RaiseUnhandledException (e, false);
			}
		}

		bool release_on_call = false;
		GCHandle gch;

		public void PersistUntilCalled ()
		{
			release_on_call = true;
			gch = GCHandle.Alloc (this);
		}

		internal CallbackNative NativeDelegate;
		Gtk.Callback managed;

		public CallbackWrapper (Gtk.Callback managed)
		{
			this.managed = managed;
			if (managed != null)
				NativeDelegate = new CallbackNative (NativeCallback);
		}

		public static Gtk.Callback GetManagedDelegate (CallbackNative native)
		{
			if (native == null)
				return null;
			CallbackWrapper wrapper = (CallbackWrapper) native.Target;
			if (wrapper == null)
				return null;
			return wrapper.managed;
		}
	}
#endregion
}
