valentina_old/src/libs/vpatterndb/calculator.h

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/************************************************************************
**
** @file calculator.h
** @author Roman Telezhynskyi <dismine(at)gmail.com>
** @date November 15, 2013
**
** @brief
** @copyright
** This source code is part of the Valentine project, a pattern making
** program, whose allow create and modeling patterns of clothing.
** Copyright (C) 2013-2015 Valentina project
** <https://bitbucket.org/dismine/valentina> All Rights Reserved.
**
** Valentina 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 3 of the License, or
** (at your option) any later version.
**
** Valentina 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 Valentina. If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/
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#ifndef CALCULATOR_H
#define CALCULATOR_H
#include "../qmuparser/qmuformulabase.h"
#include "../vmisc/def.h"
class VContainer;
/**
* @brief The Calculator class for calculation formula.
*
* Main purpose make easy evaluate value of formula and get tokens.
* Note. If created to many parser for different purpes in the same time parser can work wrong.
* Example:
* DialogEditWrongFormula *dialog = new DialogEditWrongFormula(data);
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* dialog->SetFormula(formula);
* if (dialog->exec() == QDialog::Accepted)
* {
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* formula = dialog->GetFormula();
* //Need delete dialog here because parser in dialog don't allow use correct separator for parsing here.
* //Don't know why.
* delete dialog;
* Calculator *cal = new Calculator();
* result = cal->EvalFormula(data->PlainVariables(), formula);
* delete cal;//Here can be memory leak, but dialog already check this formula and probability very low.
* }
*/
class Calculator:public qmu::QmuFormulaBase
{
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public:
Calculator();
virtual ~Calculator() Q_DECL_OVERRIDE;
qreal EvalFormula(const QHash<QString, qreal *> &vars, const QString &formula);
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private:
Q_DISABLE_COPY(Calculator)
void InitVariables(const QHash<QString, qreal *> &vars, const QMap<int, QString> &tokens,
const QString &formula);
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};
#endif // CALCULATOR_H