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62 lines
2.5 KiB
62 lines
2.5 KiB
/***************************************************************************
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* Copyright (C) 2005 Tobi Vollebregt *
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* tobivollebregt@gmail.com *
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* *
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* Copyright (C) 2005 by Joe Ferris *
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* jferris@optimistictech.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#ifndef EXPRESSION_H
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#define EXPRESSION_H
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#include <katapultitem.h>
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class CalculatorCatalog;
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/**
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@author Tobi Vollebregt
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*/
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class Expression : public KatapultItem
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{
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Q_OBJECT
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public:
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Expression(CalculatorCatalog*, const TQString&);
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virtual TQPixmap icon(int) const;
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virtual TQString text() const;
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void setText(const TQString&);
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double result() const;
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bool parseError() const;
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//evaluate() must be const, or ActionEvaluateExpression::execute() can't call it.
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//It makes sense because evaluate() does _not_ change the expression,
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//it just calculates the result and remembers that.
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void evaluate(bool assignments = false) const;
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CalculatorCatalog* catalog() const;
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private:
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CalculatorCatalog* const _catalog;
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TQString _text;
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mutable double _result;
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mutable bool _parseError;
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};
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#endif
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