121 lines
4 KiB
C++
121 lines
4 KiB
C++
//=============================================================================
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// MuseScore
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// Music Composition & Notation
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//
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// Copyright (C) 2009 Werner Schweer
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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 version 2
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// as published by the Free Software Foundation and appearing in
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// the file LICENCE.GPL
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//=============================================================================
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#ifndef __FRACTION_H__
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#define __FRACTION_H__
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#include "config.h"
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namespace Ms {
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//---------------------------------------------------------
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// Fraction
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//---------------------------------------------------------
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class Fraction {
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int _numerator;
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int _denominator;
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public:
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constexpr Fraction(int z = 0, int n = 1) : _numerator(z), _denominator(n) {}
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int numerator() const { return _numerator; }
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int denominator() const { return _denominator; }
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int& rnumerator() { return _numerator; }
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int& rdenominator() { return _denominator; }
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void setNumerator(int v) { _numerator = v; }
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void setDenominator(int v) { _denominator = v; }
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void set(int z, int n) { _numerator = z; _denominator = n; }
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bool isZero() const { return _numerator == 0; }
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bool isValid() const { return _denominator != 0; }
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void reduce();
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Fraction reduced() const;
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Fraction absValue() const;
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// check if two fractions are identical (numerator & denominator)
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// == operator checks for equal value:
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bool identical(const Fraction& v) const {
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return (_numerator == v._numerator) && (_denominator == v._denominator);
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}
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int ticks() const;
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static Fraction fromTicks(int v);
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Fraction& operator+=(const Fraction&);
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Fraction& operator-=(const Fraction&);
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Fraction& operator*=(const Fraction&);
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Fraction& operator*=(int);
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Fraction& operator/=(const Fraction&);
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Fraction& operator/=(int);
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Fraction operator+(const Fraction& v) const { return Fraction(*this) += v; }
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Fraction operator-(const Fraction& v) const { return Fraction(*this) -= v; }
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Fraction operator*(const Fraction& v) const { return Fraction(*this) *= v; }
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Fraction operator*(int v) const { return Fraction(*this) *= v; }
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Fraction operator/(const Fraction& v) const { return Fraction(*this) /= v; }
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Fraction operator/(int v) const { return Fraction(*this) /= v; }
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bool operator<(const Fraction&) const;
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bool operator<=(const Fraction&) const;
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bool operator>=(const Fraction&) const;
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bool operator>(const Fraction&) const;
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bool operator==(const Fraction&) const;
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bool operator!=(const Fraction&) const;
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QString print() const { return QString("%1/%2").arg(_numerator).arg(_denominator); }
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operator QVariant() const { return QVariant::fromValue(*this); }
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};
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#ifdef SCRIPT_INTERFACE
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//---------------------------------------------------------
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// FractionWrapper
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//---------------------------------------------------------
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class FractionWrapper : public QObject {
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Q_OBJECT
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Q_PROPERTY(int numerator READ numerator)
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Q_PROPERTY(int denominator READ denominator)
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Q_PROPERTY(int ticks READ ticks)
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Fraction f;
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public slots:
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void setFraction(Fraction _f) { f = _f; }
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public:
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FractionWrapper(const FractionWrapper& w) : QObject() { f = w.f; }
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FractionWrapper() {}
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FractionWrapper(const Fraction& _f) : f(_f) {}
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Fraction fraction() const { return f; }
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int numerator() const { return f.numerator(); }
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int denominator() const { return f.denominator(); }
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int ticks() const { return f.ticks(); }
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};
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#endif // SCRIPT_INTERFACE
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} // namespace Ms
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Q_DECLARE_METATYPE(Ms::Fraction);
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#ifdef SCRIPT_INTERFACE
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Q_DECLARE_METATYPE(Ms::FractionWrapper);
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#endif
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#endif
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