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diff --git a/src/math-buttons.h b/src/math-buttons.h
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+/*  Copyright (c) 2008-2009 Robert Ancell
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program 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
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ *  02111-1307, USA.
+ */
+
+#ifndef MATH_BUTTONS_H
+#define MATH_BUTTONS_H
+
+#include <glib-object.h>
+#include <gtk/gtk.h>
+#include "math-equation.h"
+
+G_BEGIN_DECLS
+
+#define MATH_BUTTONS(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), math_buttons_get_type(), MathButtons))
+
+typedef struct MathButtonsPrivate MathButtonsPrivate;
+
+typedef struct
+{
+    GtkVBox parent_instance;
+    MathButtonsPrivate *priv;
+} MathButtons;
+
+typedef struct
+{
+    GtkVBoxClass parent_class;
+} MathButtonsClass;
+
+typedef enum {
+    BASIC,
+    ADVANCED,
+    FINANCIAL,
+    PROGRAMMING
+} ButtonMode;
+
+GType math_buttons_get_type(void);
+
+MathButtons *math_buttons_new(MathEquation *equation);
+
+void math_buttons_set_mode(MathButtons *buttons, ButtonMode mode);
+
+ButtonMode math_buttons_get_mode(MathButtons *buttons);
+
+void math_buttons_set_programming_base(MathButtons *buttons, gint base);
+
+gint math_buttons_get_programming_base(MathButtons *buttons);
+
+#endif /* MATH_BUTTONS_H */