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diff --git a/sc/inc/chartlock.hxx b/sc/inc/chartlock.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef SC_CHARTLOCK_HXX
+#define SC_CHARTLOCK_HXX
+
+
+#include <vcl/timer.hxx>
+
+#include <cppuhelper/weakref.hxx>
+#include <com/sun/star/frame/XModel.hpp>
+
+#include <memory>
+
+class ScDocument;
+
+/** All current charts in the calc will be locked in constructor and unlocked in destructor.
+*/
+class ScChartLockGuard
+{
+public:
+                    ScChartLockGuard( ScDocument* pDoc );
+    virtual         ~ScChartLockGuard();
+
+    void            AlsoLockThisChart( const ::com::sun::star::uno::Reference<
+                        ::com::sun::star::frame::XModel >& xModel );
+
+private:
+    std::vector< ::com::sun::star::uno::WeakReference<
+        ::com::sun::star::frame::XModel > > maChartModels;
+
+    ScChartLockGuard();
+    ScChartLockGuard( const ScChartLockGuard& );
+};
+
+/** Use this to lock all charts in the calc for a little time.
+    They will unlock automatically unless you call StartOrContinueLocking() again.
+*/
+class ScTemporaryChartLock
+{
+public:
+                    ScTemporaryChartLock( ScDocument* pDoc );
+    virtual         ~ScTemporaryChartLock();
+
+    void            StartOrContinueLocking();
+    void            StopLocking();
+    void            AlsoLockThisChart( const ::com::sun::star::uno::Reference<
+                        ::com::sun::star::frame::XModel >& xModel );
+
+private:
+    ScDocument*                         mpDoc;
+    Timer                               maTimer;
+    std::auto_ptr< ScChartLockGuard >   mapScChartLockGuard;
+
+    DECL_LINK( TimeoutHdl, Timer* );
+
+    ScTemporaryChartLock();
+    ScTemporaryChartLock( const ScTemporaryChartLock& );
+};
+
+
+#endif