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diff --git a/chart2/source/controller/inc/ObjectHierarchy.hxx b/chart2/source/controller/inc/ObjectHierarchy.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 CHART2_OBJECTHIERARCHY_HXX
+#define CHART2_OBJECTHIERARCHY_HXX
+
+#include "ObjectIdentifier.hxx"
+
+#include <rtl/ustring.hxx>
+#include <com/sun/star/chart2/XChartDocument.hpp>
+#include <com/sun/star/awt/KeyEvent.hpp>
+
+#include <memory>
+#include <vector>
+
+namespace chart
+{
+
+class ExplicitValueProvider;
+
+namespace impl
+{
+class ImplObjectHierarchy;
+}
+
+class ObjectHierarchy
+{
+public:
+    typedef ObjectIdentifier tOID;
+    typedef ::std::vector< tOID > tChildContainer;
+
+    /** @param bFlattenDiagram
+            If <TRUE/>, the content of the diaram (data series, wall, floor,
+            etc.) is treated as being at the same level as the diagram. (This is
+            used for keyboard navigation).
+     */
+    explicit ObjectHierarchy(
+        const ::com::sun::star::uno::Reference<
+            ::com::sun::star::chart2::XChartDocument > & xChartDocument,
+        ExplicitValueProvider * pExplicitValueProvider = 0,
+        bool bFlattenDiagram = false,
+        bool bOrderingForElementSelector = false );
+    ~ObjectHierarchy();
+
+    static tOID      getRootNodeOID();
+    static bool      isRootNode( const tOID& rOID );
+
+    /// equal to getChildren( getRootNodeOID())
+    tChildContainer  getTopLevelChildren() const;
+    bool             hasChildren( const tOID& rParent ) const;
+    tChildContainer  getChildren( const tOID& rParent ) const;
+
+    tChildContainer  getSiblings( const tOID& rNode ) const;
+
+    /// The result is empty, if the node cannot be found in the tree
+    tOID             getParent( const tOID& rNode ) const;
+    /// @returns -1, if no parent can be determined
+    sal_Int32        getIndexInParent( const tOID& rNode ) const;
+
+private:
+
+    ::std::auto_ptr< impl::ImplObjectHierarchy > m_apImpl;
+};
+
+class ObjectKeyNavigation
+{
+public:
+    explicit ObjectKeyNavigation( const ObjectHierarchy::tOID & rCurrentOID,
+                                  const ::com::sun::star::uno::Reference<
+                                      ::com::sun::star::chart2::XChartDocument > & xChartDocument,
+                                  ExplicitValueProvider * pExplicitValueProvider = 0 );
+
+    bool handleKeyEvent( const ::com::sun::star::awt::KeyEvent & rEvent );
+    ObjectHierarchy::tOID getCurrentSelection() const;
+
+private:
+    void setCurrentSelection( const ObjectHierarchy::tOID& rOID );
+    bool first();
+    bool last();
+    bool next();
+    bool previous();
+    bool up();
+    bool down();
+    bool veryFirst();
+    bool veryLast();
+
+    ObjectHierarchy::tOID m_aCurrentOID;
+    ::com::sun::star::uno::Reference<
+            ::com::sun::star::chart2::XChartDocument > m_xChartDocument;
+    ExplicitValueProvider * m_pExplicitValueProvider;
+    bool m_bStepDownInDiagram;
+};
+
+} //  namespace chart
+
+// CHART2_OBJECTHIERARCHY_HXX
+#endif