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diff --git a/src/3rdparty/adaptagrams/libcola/box.h b/src/3rdparty/adaptagrams/libcola/box.h
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+/*
+ * vim: ts=4 sw=4 et tw=0 wm=0
+ *
+ * libcola - A library providing force-directed network layout using the 
+ *           stress-majorization method subject to separation constraints.
+ *
+ * Copyright (C) 2014  Monash University
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * See the file LICENSE.LGPL distributed with the library.
+ *
+ * This library 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.
+ *
+ * Author(s):  Michael Wybrow
+ *
+*/
+
+#ifndef LIBCOLA_BOX_H
+#define LIBCOLA_BOX_H
+
+#include <cstdio>
+
+#include "libvpsc/rectangle.h"
+
+
+namespace cola {
+
+/**
+ * @brief A box consisting of four edge values for representing padding or 
+ *        margins for rectangles.
+ */
+class Box
+{
+    public:
+        /**
+         * @brief Constructs a padding or margin box consisting of a value for
+         *        each edge.
+         *
+         * Values should be nonnegative.
+         *
+         * @param[in] xMin  Minimum horizontal value.
+         * @param[in] xMax  Maximum horizontal value.
+         * @param[in] yMin  Minimum vertical value.
+         * @param[in] yMax  Maximum vertical value.
+         */
+        Box(double xMin, double xMax, double yMin, double yMax);
+        /**
+         * @brief Constructs a padding or margin box consisting of a value for
+         *        each edge.
+         *
+         * Values should be nonnegative.
+         *
+         * @param[in] all   The value to be used for all four edges.
+         */
+        Box(double all);
+        /**
+         * @brief Constructs an empty padding or margin box.
+         */
+        Box();
+        ~Box();
+
+        bool empty(void) const;
+        double min(size_t dim) const;
+        double max(size_t dim) const;
+        void outputCode(FILE *fp) const;
+        vpsc::Rectangle rectangleByApplyingBox(
+                const vpsc::Rectangle rectangle) const;
+
+   private:
+        static double nonNegative(double value);
+
+        double m_min[2];
+        double m_max[2];
+};
+
+} // namespace cola
+#endif