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diff --git a/src/libs/threadimageio/previewtask.h b/src/libs/threadimageio/previewtask.h
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2006-12-26
+ * Description : Multithreaded loader for previews
+ *
+ * Copyright (C) 2006-2007 by Marcel Wiesweg <[email protected]>
+ * Copyright (C) 2006-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ *
+ * 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 PREVIEW_TASK_H
+#define PREVIEW_TASK_H
+
+// TQt includes.
+
+#include <tqimage.h>
+
+// Local includes.
+
+#include "loadsavetask.h"
+
+namespace Digikam
+{
+
+class PreviewLoadingTask : public SharedLoadingTask
+{
+public:
+
+    PreviewLoadingTask(LoadSaveThread* thread, LoadingDescription description)
+        : SharedLoadingTask(thread, description, LoadSaveThread::AccessModeRead, LoadingTaskStatusLoading)
+        {}
+
+    virtual void execute();
+
+private:
+
+    bool needToScale(const TQSize &imageSize, int previewSize);
+    bool loadImagePreview(TQImage& image, const TQString& path);
+};
+
+} // namespace Digikam
+
+#endif // PREVIEW_TASK_H