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diff --git a/include/basegfx/range/b1drange.hxx b/include/basegfx/range/b1drange.hxx
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+++ b/include/basegfx/range/b1drange.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <basegfx/range/basicrange.hxx>
+
+
+namespace basegfx
+{
+
+    /** A one-dimensional interval over doubles
+
+        This is a set of real numbers, bounded by a lower and an upper
+        value. All inbetween values are included in the set (see also
+        http://en.wikipedia.org/wiki/Interval_%28mathematics%29).
+
+        The set is closed, i.e. the upper and the lower bound are
+        included (if you're used to the notation - we're talking about
+        [a,b] here, compared to half-open [a,b) or open intervals
+        (a,b)).
+
+        That means, isInside(val) will return true also for values of
+        val=a or val=b.
+     */
+    class B1DRange
+    {
+        ::basegfx::BasicRange< double, DoubleTraits >   maRange;
+
+    public:
+        B1DRange() {}
+
+        /// Create degenerate interval consisting of a single double number
+        explicit B1DRange(double fStartValue)
+        :   maRange(fStartValue)
+        {
+        }
+
+        /// Create proper interval between the two given double values
+        B1DRange(double fStartValue1, double fStartValue2)
+        :   maRange(fStartValue1)
+        {
+            expand(fStartValue2);
+        }
+
+        /** Check if the interval set is empty
+
+            @return false, if no value is in this set - having a
+            single value included will already return true.
+         */
+        bool isEmpty() const
+        {
+            return maRange.isEmpty();
+        }
+
+        bool operator==( const B1DRange& rRange ) const
+        {
+            return (maRange == rRange.maRange);
+        }
+
+        bool operator!=( const B1DRange& rRange ) const
+        {
+            return (maRange != rRange.maRange);
+        }
+
+        /// get lower bound of the set. returns arbitrary values for empty sets.
+        double getMinimum() const
+        {
+            return maRange.getMinimum();
+        }
+
+        /// get upper bound of the set. returns arbitrary values for empty sets.
+        double getMaximum() const
+        {
+            return maRange.getMaximum();
+        }
+
+        /// return difference between upper and lower value. returns 0 for empty sets.
+        double getRange() const
+        {
+            return maRange.getRange();
+        }
+
+        /// return middle of upper and lower value. returns 0 for empty sets.
+        double getCenter() const
+        {
+            return maRange.getCenter();
+        }
+
+        /// yields true if value is contained in set
+        bool isInside(double fValue) const
+        {
+            return maRange.isInside(fValue);
+        }
+
+        /// yields true if rRange at least partly inside set
+        bool overlaps(const B1DRange& rRange) const
+        {
+            return maRange.overlaps(rRange.maRange);
+        }
+
+        /// yields true if overlaps(rRange) does, and the overlap is larger than infinitesimal
+        bool overlapsMore(const B1DRange& rRange) const
+        {
+            return maRange.overlapsMore(rRange.maRange);
+        }
+
+        /// add fValue to the set, expanding as necessary
+        void expand(double fValue)
+        {
+            maRange.expand(fValue);
+        }
+
+        /// add rRange to the set, expanding as necessary
+        void expand(const B1DRange& rRange)
+        {
+            maRange.expand(rRange.maRange);
+        }
+
+        /// calc set intersection
+        void intersect(const B1DRange& rRange)
+        {
+            maRange.intersect(rRange.maRange);
+        }
+
+        /// clamp value on range
+        double clamp(double fValue) const
+        {
+            return maRange.clamp(fValue);
+        }
+    };
+
+} // end of namespace basegfx
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */