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Diffstat (limited to 'katapult/plugins/catalogs/calculatorcatalog/expression.h')
| -rw-r--r-- | katapult/plugins/catalogs/calculatorcatalog/expression.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/katapult/plugins/catalogs/calculatorcatalog/expression.h b/katapult/plugins/catalogs/calculatorcatalog/expression.h new file mode 100644 index 0000000..6d736f9 --- /dev/null +++ b/katapult/plugins/catalogs/calculatorcatalog/expression.h @@ -0,0 +1,60 @@ +/*************************************************************************** + * 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 |