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diff --git a/kalzium/src/molcalcwidget.h b/kalzium/src/molcalcwidget.h
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+++ b/kalzium/src/molcalcwidget.h
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+#ifndef MOLCALCWIDGET_H
+#define MOLCALCWIDGET_H
+/***************************************************************************
+ *   Copyright (C) 2005 by Carsten Niehaus                                 *
+ *   [email protected]                                                      *
+ *                                                                         *
+ *   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 of the License, 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.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.             *
+ ***************************************************************************/
+
+#include "molcalcwidgetbase.h"
+
+#include "moleculeparser.h"
+
+class KToggleAction;
+class KLineEdit;
+
+class Element;
+class MolcalcDialog;
+class MoleculeParser;
+
+/**
+ * This widget is a small calculator for molecules.
+ *
+ * @author Carsten Niehaus
+ * @author Pino Toscano
+ * @author Inge Wallin
+ */
+class MolcalcWidget : public MolcalcWidgetBase
+{
+	Q_OBJECT
+	public:
+		/**
+		 * Constructor
+		 * @param parent parent widget
+		 * @param name name of this widget
+		 */
+		MolcalcWidget( QWidget *parent = 0, const char *name = 0 );
+
+	protected slots:
+		void slotCalcButtonClicked();
+
+	private slots:
+		void clear();
+
+    private:
+		/**
+		 * @return the HTML code of an element symbol and its
+		 * subscripted amount. Eg: Mg<sub>2</sub>
+		 */
+		QString compositionString( ElementCountMap &_map );
+
+		/**
+		 * This methods gathers all the data and updates the 
+		 * contents of the widget.
+		 */
+		void updateUI();
+
+	private:
+		MoleculeParser   m_parser;
+		
+		double           m_mass;
+		bool 			 m_validInput;
+		ElementCountMap  m_elementMap;
+};
+
+
+#endif // MOLCALC_IMPL_H