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diff --git a/libtdepim/weaverextensions.h b/libtdepim/weaverextensions.h
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+/* -*- C++ -*-
+
+   This file declares the Weaver Extensions basics.
+
+   $ Author: Mirko Boehm $
+   $ Copyright: (C) 2004, Mirko Boehm $
+   $ Contact: mirko@kde.org
+         http://www.kde.org
+         http://www.hackerbuero.org $
+   $ License: LGPL with the following explicit clarification:
+         This code may be linked against any version of the TQt toolkit
+         from Troll Tech, Norway. $
+
+*/
+
+#ifndef WEAVEREXTENSIONS_H
+#define WEAVEREXTENSIONS_H
+
+#include <tqobject.h>
+
+namespace KPIM {
+namespace ThreadWeaver {
+
+    class Weaver;
+    class Thread;
+
+    /** A WeaverExtension can be attached to an existing Weaver object and
+        will then receive signals on actions the Weaver takes, like starting
+        to process a specific job, assigning a job to a thread or suspending a
+        thread. It can be used to monitor the state of a program, but also,
+        for example, to provide visualization of the Weaver's work load in GUI
+        programs.  Derive from it to actually create an extension. */
+    class WeaverExtension : public TQObject
+        {
+            Q_OBJECT
+  TQ_OBJECT
+        public:
+            WeaverExtension ( TQObject *parent = 0, const char *name = 0);
+            /** Attach() is a convenience method that will connect all our
+            slots to signals emitted by the weaver. It is also possible to
+            avoid attach() and only connect necessary signals. */
+            void attach (Weaver *);
+            virtual ~WeaverExtension() = 0;
+        public slots:
+            // these methods are implemented, but do nothing in the default configuration
+            // a thread is created:
+            virtual void threadCreated (Thread *);
+            // a thread is destroyed:
+            virtual void threadDestroyed (Thread *);
+            // the thread is processing a job
+            virtual void threadBusy (Thread *);
+            // the thread is suspended and will be waked when jobs become
+            // available
+            virtual void threadSuspended (Thread *);
+        };
+
+} // namespace ThreadWeaver
+}
+
+#endif // WEAVEREXTENSIONS_H