2003-12-30 Mike Kestner <mkestner@ximian.com>

* glib/Object.cs (ConnectDefaultHandlers): reflection code to
	hook up overridden default signal handlers.
	* glue/type.c  (gtksharp_override_virtual_method): peek the gtype
	and ref the class if it isn't created yet.
	* sample/Subclass.cs : update to override Button.OnClicked.

svn path=/trunk/gtk-sharp/; revision=21559

ChangeLog

@@ -1,3 +1,11 @@
+2003-12-30  Mike Kestner  <mkestner@ximian.com>
+
+	* glib/Object.cs (ConnectDefaultHandlers): reflection code to
+	hook up overridden default signal handlers.
+	* glue/type.c  (gtksharp_override_virtual_method): peek the gtype
+	and ref the class if it isn't created yet.
+	* sample/Subclass.cs : update to override Button.OnClicked.
+
 2003-12-26  Mike Kestner  <mkestner@ximian.com>
 
 	* glue/selectiondata.c : new glue to make SelectionData opaque

glib/Object.cs

@@ -141,6 +141,28 @@ namespace GLib {
 			return GetObject (o, false);
 		}
 
+		private static void ConnectDefaultHandlers (GType gtype, System.Type t)
+		{
+			foreach (MethodInfo minfo in t.GetMethods(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.DeclaredOnly)) {
+				MethodInfo baseinfo = minfo.GetBaseDefinition ();
+				if (baseinfo == minfo)
+					continue;
+
+				foreach (object attr in baseinfo.GetCustomAttributes (true)) {
+					if (attr.ToString () != "GLib.DefaultSignalHandlerAttribute")
+						continue;
+
+					DefaultSignalHandlerAttribute sigattr = attr as DefaultSignalHandlerAttribute;
+					MethodInfo connector = sigattr.Type.GetMethod (sigattr.ConnectionMethod, BindingFlags.Static | BindingFlags.NonPublic);
+					object[] parms = new object [1];
+					parms [0] = gtype;
+					connector.Invoke (null, parms);
+					break;
+				}
+			}
+					
+		}
+
 		[DllImport("gtksharpglue")]
 		static extern IntPtr gtksharp_register_type (string name, IntPtr parent_type);
 
@@ -165,7 +187,9 @@ namespace GLib {
 			GType parent_gtype = (GType) pi.GetValue (null, null);
 			string name = t.Namespace.Replace(".", "_") + t.Name;
 			GtkSharp.ObjectManager.RegisterType (name, t.Namespace + t.Name, t.Assembly.GetName().Name);
-			return new GLib.GType (gtksharp_register_type (name, parent_gtype.Val));
+			GType gtype = new GType (gtksharp_register_type (name, parent_gtype.Val));
+			ConnectDefaultHandlers (gtype, t);
+			return gtype;
 		}
 
 		/// <summary>

glue/type.c

@@ -71,6 +71,8 @@ gtksharp_register_type (gchar *name, GType parent)
 void
 gtksharp_override_virtual_method (GType g_type, const gchar *name, GCallback callback)
 {
+	if (g_type_class_peek (g_type) == NULL)
+		g_type_class_ref (g_type);
 	guint id = g_signal_lookup (name, g_type);
 	GClosure *closure = g_cclosure_new (callback, NULL, NULL);
 	g_signal_override_class_closure (id, g_type, closure);

sample/Subclass.cs

@@ -1,8 +1,8 @@
-// Subclass.cs - Widget subclass Test implementation
+// Subclass.cs - Widget subclass Test 
 //
-// Author: Mike Kestner <mkestner@speakeasy.net>
+// Author: Mike Kestner <mkestner@ximian.com>
 //
-// (c) 2001-2002 Mike Kestner
+// (c) 2001-2003 Mike Kestner, Novell, Inc.
 
 namespace GtkSamples {
 
@@ -17,35 +17,22 @@ namespace GtkSamples {
 		{
 			Application.Init ();
 			Window win = new Window ("Button Tester");
-			win.DefaultSize = new Size (200, 150);
-			win.DeleteEvent += new DeleteEventHandler (Window_Delete);
 			Button btn = new MyButton ();
-			btn.Label = "I'm a subclassed button";
-			btn.Clicked += new EventHandler (btn_click);
 			win.Add (btn);
 			win.ShowAll ();
 			Application.Run ();
 			return 0;
 		}
-
-		static void btn_click (object obj, EventArgs args)
-		{
-			Console.WriteLine ("Button Clicked");
-		}
-
-		static void Window_Delete (object obj, DeleteEventArgs args)
-		{
-			Application.Quit ();
-			args.RetVal = true;
-		}
-
 	}
 
 	public class MyButton : Gtk.Button {
 
 		static GLib.GType gtype = GLib.GType.Invalid;
 
-		public MyButton () : base (GType) {}
+		public MyButton () : base (GType) 
+		{
+			Label = "I'm a subclassed button";
+		}
 
 		public static new GLib.GType GType {
 			get {
@@ -54,5 +41,10 @@ namespace GtkSamples {
 				return gtype;
 			}
 		}
+
+		protected override void OnClicked ()
+		{
+			Console.WriteLine ("Button::Clicked default handler fired.");
+		}
 	}
 }