Chris@189: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@189: 
Chris@189: /*
Chris@189:     Sonic Visualiser
Chris@189:     An audio file viewer and annotation editor.
Chris@189:     Centre for Digital Music, Queen Mary, University of London.
Chris@189:     This file copyright 2006 Chris Cannam.
Chris@189:     
Chris@189:     This program is free software; you can redistribute it and/or
Chris@189:     modify it under the terms of the GNU General Public License as
Chris@189:     published by the Free Software Foundation; either version 2 of the
Chris@189:     License, or (at your option) any later version.  See the file
Chris@189:     COPYING included with this distribution for more information.
Chris@189: */
Chris@189: 
Chris@189: #ifndef _RANGE_MAPPER_H_
Chris@189: #define _RANGE_MAPPER_H_
Chris@189: 
Chris@189: #include <QString>
Chris@189: 
Chris@189: 
Chris@189: class RangeMapper 
Chris@189: {
Chris@189: public:
Chris@189:     virtual ~RangeMapper() { }
Chris@189:     virtual int getPositionForValue(float value) const = 0;
Chris@189:     virtual float getValueForPosition(int position) const = 0;
Chris@189:     virtual QString getUnit() const { return ""; }
Chris@189: };
Chris@189: 
Chris@189: 
Chris@189: class LinearRangeMapper : public RangeMapper
Chris@189: {
Chris@189: public:
Chris@189:     LinearRangeMapper(int minpos, int maxpos,
Chris@189:                       float minval, float maxval,
Chris@189:                       QString unit = "");
Chris@189:     
Chris@189:     virtual int getPositionForValue(float value) const;
Chris@189:     virtual float getValueForPosition(int position) const;
Chris@189: 
Chris@189:     virtual QString getUnit() const { return m_unit; }
Chris@189: 
Chris@189: protected:
Chris@189:     int m_minpos;
Chris@189:     int m_maxpos;
Chris@189:     float m_minval;
Chris@189:     float m_maxval;
Chris@189:     QString m_unit;
Chris@189: };
Chris@189: 
Chris@189: 
Chris@189: class LogRangeMapper : public RangeMapper
Chris@189: {
Chris@189: public:
Chris@189:     LogRangeMapper(int minpos, int maxpos,
Chris@189:                    float ratio, float minlog,
Chris@189:                    QString m_unit = "");
Chris@189: 
Chris@189:     virtual int getPositionForValue(float value) const;
Chris@189:     virtual float getValueForPosition(int position) const;
Chris@189: 
Chris@189:     virtual QString getUnit() const { return m_unit; }
Chris@189: 
Chris@189: protected:
Chris@189:     int m_minpos;
Chris@189:     int m_maxpos;
Chris@189:     float m_ratio;
Chris@189:     float m_minlog;
Chris@189:     float m_maxlog;
Chris@189:     QString m_unit;
Chris@189: };
Chris@189: 
Chris@189: 
Chris@189: #endif