/
operatorrule.h
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/
operatorrule.h
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/*
* The Doomsday Engine Project
*
* Copyright (c) 2011-2013 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBDENG2_OPERATORRULE_H
#define LIBDENG2_OPERATORRULE_H
#include "../Rule"
namespace de {
/**
* Calculates a value by applying a mathematical operator to the values of one
* or two other rules.
* @ingroup widgets
*/
class DENG2_PUBLIC OperatorRule : public Rule
{
public:
enum Operator {
Equals,
Negate,
Half,
Double,
Sum,
Subtract,
Multiply,
Divide,
Maximum,
Minimum
};
public:
OperatorRule(Operator op, Rule const *unary);
OperatorRule(Operator op, Rule const *left, Rule const *right);
protected:
~OperatorRule();
void update();
private:
Operator _operator;
Rule const *_leftOperand;
Rule const *_rightOperand;
};
} // namespace de
#endif // LIBDENG2_OPERATORRULE_H