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calculatorcatalog.h

/***************************************************************************
 *   Copyright (C) 2005  Tobi Vollebregt                                   *
 *   tobivollebregt@gmail.com                                              *
 *                                                                         *
 *   Copyright (C) 2005 by Joe Ferris                                      *
 *   jferris@optimistictech.com                                            *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef CALCULATORCATALOG_H
#define CALCULATORCATALOG_H

#include <kgenericfactory.h>

#include <qmap.h>
#include <qptrlist.h>
#include <qstring.h>
#include <qvaluevector.h>

#include "expression.h"
#include "katapultcatalog.h"

class QWidget;

typedef double (*FunPtr)(double);

/**
@author Tobi Vollebregt
 */
00043 class CalculatorCatalog : public KatapultCatalog
{
      Q_OBJECT

      public:

            struct ParserControl {
                  const char* expression;
                  CalculatorCatalog* catalog;
                  bool assignments; //are assignments enabled?
                  double result;
            };

            struct Function {
                  const char* name;
                  int length;
                  FunPtr fptr;
            };

            CalculatorCatalog(QObject*, const char*, const QStringList&);
            virtual ~CalculatorCatalog();

            //virtual void initialize();
            virtual void readSettings(KConfigBase*);
            virtual void writeSettings(KConfigBase*);
            virtual QWidget* configure();

            int getVarID(const char*);
            double getVar(int) const;
            double setVar(int, double);

            int fracDigits() const;
            bool scientific() const;
            bool degrees() const;
            bool clipboard() const;
            QString formatString() const;
            const Function* functionTable() const;

      protected:

            virtual void queryChanged();

      private:

            typedef QMap<QString, int> VarNameToIdMap;
            typedef QValueVector<double> VarIdToValueVector;

            static const Function radiansFunctionTable[];
            static const Function degreesFunctionTable[];

            void reset();
            bool accepts(const QString&) const;

            Expression _result; // The one result (there's always one).

            VarNameToIdMap varNameToId;      // Maps strings to IDs.
            VarIdToValueVector varIdToValue; // Maps IDs to values.
            QString _pendingVarName; // Pending while rest of assignment is parsed.

            int _fracDigits;   // Number of fractional digits.
            bool _bScientific; // Normal or scientific mode?
            bool _bDegrees;    // Radians or degrees?
            bool _bClipboard;  // Copy to clipboard?
            QString _formatString; // for clipboard copy

      private slots:

            void fracDigitsChanged(int);
            void scientificChanged(bool);
            void degreesChanged(bool);
            void clipboardChanged(bool);
            void formatStringChanged(const QString&);

};


/* from parser.y / parser.cpp: */
int yyparse(CalculatorCatalog::ParserControl*);

#endif

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