public void GenCallback (StreamWriter sw)
{
if (IsEventHandler)
return;
sw.WriteLine ("\t\t[GLib.CDeclCallback]");
sw.WriteLine ("\t\tdelegate " + retval.ToNativeType + " " + DelegateName + " (" + CallbackSig + ", IntPtr gch);");
sw.WriteLine ();
sw.WriteLine ("\t\tstatic " + retval.ToNativeType + " " + CallbackName + " (" + CallbackSig + ", IntPtr gch)");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\t{0} args = new {0} ();", EventArgsQualifiedName);
sw.WriteLine("\t\t\ttry {");
sw.WriteLine("\t\t\t\tGLib.Signal sig = ((GCHandle) gch).Target as GLib.Signal;");
sw.WriteLine("\t\t\t\tif (sig == null)");
sw.WriteLine("\t\t\t\t\tthrow new Exception(\"Unknown signal GC handle received \" + gch);");
sw.WriteLine();
string finish = GenArgsInitialization (sw);
sw.WriteLine("\t\t\t\t{0} handler = ({0}) sig.Handler;", EventHandlerQualifiedName);
sw.WriteLine("\t\t\t\thandler (GLib.Object.GetObject (arg0), args);");
sw.WriteLine("\t\t\t} catch (Exception e) {");
sw.WriteLine("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, false);");
sw.WriteLine("\t\t\t}");
GenArgsCleanup (sw, finish);
sw.WriteLine("\t\t}");
sw.WriteLine();
}