GtkSharp/gtk/Input.custom

// Gtk.Input.custom - Gtk Input class customizations
//
// Author: Mike Kestner <mkestner@novell.com>
//
// Copyright (c) 2005 Novell, Inc. 
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General 
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.


		[DllImport("libgtk-win32-2.0-0.dll")]
		static extern uint gtk_input_add_full(int source, int condition, InputFunctionNative function, GtkSharp.CallbackMarshalNative marshal, IntPtr data, GLib.DestroyNotify destroy);

		[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
		delegate void InputFunctionNative(IntPtr data, int source, int condition);

		class InputFunctionWrapper {

			public void NativeCallback (IntPtr data, int source, int condition)
			{
				try {
					IntPtr _arg0 = data;
					int _arg1 = source;
					Gdk.InputCondition _arg2 = (Gdk.InputCondition) condition;
					managed ( _arg0,  _arg1,  _arg2);
				} catch (Exception e) {
					GLib.ExceptionManager.RaiseUnhandledException (e, false);
				}
			}

			internal InputFunctionNative NativeDelegate;
			Gdk.InputFunction managed;

			public InputFunctionWrapper (Gdk.InputFunction managed)
			{
				this.managed = managed;
				if (managed != null)
					NativeDelegate = new InputFunctionNative (NativeCallback);
			}
		}

		class InputProxy {

			InputFunctionWrapper function;
			GtkSharp.CallbackMarshalWrapper marshal;
			IntPtr data;
			DestroyNotify destroy;
			GLib.DestroyNotify handler;

			public InputProxy (InputFunctionWrapper function, GtkSharp.CallbackMarshalWrapper marshal, IntPtr data, DestroyNotify destroy)
			{
				this.marshal = marshal;
				this.function = function;
				this.destroy = destroy;
				this.data = data;
				handler = new GLib.DestroyNotify (OnDestroy);
			}

			void OnDestroy (IntPtr data)
			{
				if (destroy != null)
					destroy ();

				GCHandle gch = (GCHandle) data;
				gch.Free ();
			}

			public GLib.DestroyNotify Handler {
				get {
					return handler;
				}
			}
		}

		[Obsolete]
		public static uint AddFull(int source, Gdk.InputCondition condition, Gdk.InputFunction function, Gtk.CallbackMarshal marshal, IntPtr data, Gtk.DestroyNotify destroy) {
			InputFunctionWrapper function_wrapper = new InputFunctionWrapper (function);
			GtkSharp.CallbackMarshalWrapper marshal_wrapper = new GtkSharp.CallbackMarshalWrapper (marshal);
			InputProxy proxy = new InputProxy (function_wrapper, marshal_wrapper, data, destroy);
			GCHandle gch = GCHandle.Alloc (proxy);
			return gtk_input_add_full (source, (int) condition, function_wrapper.NativeDelegate, marshal_wrapper.NativeDelegate, (IntPtr) gch, proxy.Handler);
		}