interval.h

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#ifndef INTERVAL_H_
#define INTERVAL_H_

#include <QString>

class CADiatonicPitch;

class CAInterval {
public:
        enum CAQuality {
                Major = 1,
                Minor = -1,
                Perfect = 0,
                Augmented = 2,
                Diminished = -2
        };

        enum CAQuantity {
                Undefined = 0,
                Prime = 1,
                Second = 2,
                Third = 3,
                Fourth = 4,
                Fifth = 5,
                Sixth = 6,
                Seventh = 7,
                Octave = 8
        };

        CAInterval();
        CAInterval( int qlt, int qnt );
        CAInterval( CADiatonicPitch note1, CADiatonicPitch note2, bool absolute=true );

        CAInterval operator~();
        CAInterval operator+( CAInterval );
        CAInterval operator-(CAInterval i) {
                return operator+( CAInterval( i.quality(), i.quantity()*(-1) ) );
        }

        CAInterval operator*( int numerator ) {
                CAInterval interval = *this;
                while ( --numerator ) {
                        interval = interval + (*this);
                }

                return interval;
        }

        bool operator==( CAInterval i ) {
                return i.quality()==_qlt && i.quantity()==_qnt;
        }
        bool operator!=( CAInterval i ) {
                return !(operator==(i));
        }

        inline const int quality() { return _qlt; }
        inline const int quantity() { return _qnt; }

        inline void setQuality( const int qlt ) { _qlt = qlt; }
        inline void setQuantity( const int qnt ) { _qnt = qnt; }

        int semitones();

        static CAInterval fromSemitones( int semitones );
        static const QString qualityToReadable( int k );
        static const QString quantityToReadable( int k );

private:
        int _qlt;
        int _qnt;
};
#endif /* INTERVAL_H_ */