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/***************************************************************************
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef EXPRESSION_H
#define EXPRESSION_H
#include <katapultitem.h>
class CalculatorCatalog;
/**
@author Tobi Vollebregt
*/
class Expression : public KatapultItem
{
Q_OBJECT
public:
Expression(CalculatorCatalog*, const QString&);
virtual QPixmap icon(int) const;
virtual QString text() const;
void setText(const QString&);
double result() const;
bool parseError() const;
//evaluate() must be const, or ActionEvaluateExpression::execute() can't call it.
//It makes sense because evaluate() does _not_ change the expression,
//it just calculates the result and remembers that.
void evaluate(bool assignments = false) const;
CalculatorCatalog* catalog() const;
private:
CalculatorCatalog* const _catalog;
QString _text;
mutable double _result;
mutable bool _parseError;
};
#endif
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