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diff --git a/kbabel/common/catalogview.h b/kbabel/common/catalogview.h
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+/* ****************************************************************************
+  This file is part of KBabel
+
+  Copyright (C) 1999-2000 by Matthias Kiefer
+                            <matthias.kiefer@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 of the License, 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.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+  In addition, as a special exception, the copyright holders give
+  permission to link the code of this program with any edition of
+  the Qt library by Trolltech AS, Norway (or with modified versions
+  of Qt that use the same license as Qt), and distribute linked
+  combinations including the two.  You must obey the GNU General
+  Public License in all respects for all of the code used other than
+  Qt. If you modify this file, you may extend this exception to
+  your version of the file, but you are not obligated to do so.  If
+  you do not wish to do so, delete this exception statement from
+  your version.
+  
+**************************************************************************** */
+#ifndef CATALOGVIEW_H
+#define CATALOGVIEW_H
+
+namespace KBabel
+{
+
+class EditCommand;
+
+/**
+ * This class represents a base class for a @ref Catalog view. It declares
+ * an abstract method @ref update to be redefined by the actual
+ * view. Using this method, the catalog the view is registered for
+ * will inform the views about changes in the catalog.
+ *
+ * @short This class represents a base class for a catalog view.
+ * @author Matthias Kiefer <matthias.kiefer@gmx.de>
+ */
+class CatalogView
+{
+public:
+    /** The only method to be redefined in inherited classes.
+     *  This method is called by @ref Catalog to update the view
+     *  in case there are changes.
+     *  @param cmd the command line performed on the catalog
+     *  @param undo this is used for undo, reverse the operation
+     */
+    virtual void update(EditCommand* cmd, bool undo=false)=0;
+};
+
+}
+
+#endif // CATALOGVIEW_H