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diff --git a/src/libs/dimg/loaders/dimgloaderobserver.h b/src/libs/dimg/loaders/dimgloaderobserver.h
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2006-01-03
+ * Description : DImgLoader observer interface
+ *
+ * Copyright (C) 2006-2007 by Marcel Wiesweg <marcel.wiesweg@gmx.de>
+ *
+ * This program is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU General
+ * Public License as published by the Free Software Foundation;
+ * either version 2, or (at your option)
+ * any later version.
+ * 
+ * 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 General Public License for more details.
+ *
+ * ============================================================ */
+
+#ifndef DIMGLOADEROBSERVER_H
+#define DIMGLOADEROBSERVER_H
+
+// Local includes.
+
+#include "digikam_export.h"
+
+namespace Digikam
+{
+
+class DImg;
+
+class DIGIKAM_EXPORT DImgLoaderObserver
+{
+
+public:
+    // posts progress information about image IO
+    virtual void progressInfo(const DImg *, float /*progress*/)
+            {};
+
+    // queries whether the image IO operation shall be continued
+    virtual bool continueQuery(const DImg *)
+            { return true; };
+
+    // Return a relative value which determines the granularity, the frequency
+    // with which the DImgLoaderObserver is checked and progress is posted.
+    // Standard is 1.0. Values < 1 mean less granularity (fewer checks),
+    // values > 1 mean higher granularity (more checks).
+    virtual float granularity()
+            { return 1.0; };
+
+    // This is a hack needed to prevent hanging when a TDEProcess-based loader (raw loader)
+    // is waiting for the process to finish, but the main thread is waiting
+    // for the thread to finish and no TDEProcess events are delivered.
+    // Remove when porting to TQt4.
+    virtual bool isShuttingDown()
+            { return false; }
+
+    virtual ~DImgLoaderObserver(){};
+};
+
+}      // namespace Digikam
+
+#endif // DIMGLOADEROBSERVER_H