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diff --git a/chart2/source/view/charttypes/BarPositionHelper.hxx b/chart2/source/view/charttypes/BarPositionHelper.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_BARPOSITIONHELPER_HXX
+#define _CHART2_BARPOSITIONHELPER_HXX
+
+#include "PlottingPositionHelper.hxx"
+#include "CategoryPositionHelper.hxx"
+
+//.............................................................................
+namespace chart
+{
+//.............................................................................
+
+//-----------------------------------------------------------------------------
+/**
+*/
+
+class BarPositionHelper : public CategoryPositionHelper, public PlottingPositionHelper
+{
+public:
+    BarPositionHelper( bool bSwapXAndY=true );
+    BarPositionHelper( const BarPositionHelper& rSource );
+    virtual ~BarPositionHelper();
+
+    virtual PlottingPositionHelper* clone() const;
+
+    virtual ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XTransformation >
+                        getTransformationScaledLogicToScene() const;
+
+    void                updateSeriesCount( double fSeriesCount ); /*only enter the size of x stacked series*/
+
+    sal_Int32           getStartCategoryIndex() const {
+                            //first category (index 0) matches with real number 1.0
+                            sal_Int32 nStart = static_cast<sal_Int32>(getLogicMinX() - 0.5);
+                            if( nStart < 0 )
+                                nStart = 0;
+                            return nStart;
+                        }
+    sal_Int32           getEndCategoryIndex() const  {
+                            //first category (index 0) matches with real number 1.0
+                            sal_Int32 nEnd = static_cast<sal_Int32>(getLogicMaxX() - 0.5);
+                            if( nEnd < 0 )
+                                nEnd = 0;
+                            return nEnd;
+                        }
+};
+
+//.............................................................................
+} //namespace chart
+//.............................................................................
+#endif