annotate base/RangeMapper.h @ 519:21f86744d38e sv-v1.4

...
author Chris Cannam
date Thu, 11 Dec 2008 12:37:16 +0000
parents 9525c9d7e54d
children b4a8d8221eaf
rev   line source
Chris@189 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@189 2
Chris@189 3 /*
Chris@189 4 Sonic Visualiser
Chris@189 5 An audio file viewer and annotation editor.
Chris@189 6 Centre for Digital Music, Queen Mary, University of London.
Chris@202 7 This file copyright 2006 QMUL.
Chris@189 8
Chris@189 9 This program is free software; you can redistribute it and/or
Chris@189 10 modify it under the terms of the GNU General Public License as
Chris@189 11 published by the Free Software Foundation; either version 2 of the
Chris@189 12 License, or (at your option) any later version. See the file
Chris@189 13 COPYING included with this distribution for more information.
Chris@189 14 */
Chris@189 15
Chris@189 16 #ifndef _RANGE_MAPPER_H_
Chris@189 17 #define _RANGE_MAPPER_H_
Chris@189 18
Chris@189 19 #include <QString>
Chris@189 20
Chris@189 21
Chris@189 22 class RangeMapper
Chris@189 23 {
Chris@189 24 public:
Chris@189 25 virtual ~RangeMapper() { }
Chris@189 26 virtual int getPositionForValue(float value) const = 0;
Chris@189 27 virtual float getValueForPosition(int position) const = 0;
Chris@189 28 virtual QString getUnit() const { return ""; }
Chris@189 29 };
Chris@189 30
Chris@189 31
Chris@189 32 class LinearRangeMapper : public RangeMapper
Chris@189 33 {
Chris@189 34 public:
Chris@189 35 LinearRangeMapper(int minpos, int maxpos,
Chris@189 36 float minval, float maxval,
Chris@464 37 QString unit = "", bool inverted = false);
Chris@189 38
Chris@189 39 virtual int getPositionForValue(float value) const;
Chris@189 40 virtual float getValueForPosition(int position) const;
Chris@189 41
Chris@189 42 virtual QString getUnit() const { return m_unit; }
Chris@189 43
Chris@189 44 protected:
Chris@189 45 int m_minpos;
Chris@189 46 int m_maxpos;
Chris@189 47 float m_minval;
Chris@189 48 float m_maxval;
Chris@189 49 QString m_unit;
Chris@464 50 bool m_inverted;
Chris@189 51 };
Chris@189 52
Chris@189 53
Chris@189 54 class LogRangeMapper : public RangeMapper
Chris@189 55 {
Chris@189 56 public:
Chris@189 57 LogRangeMapper(int minpos, int maxpos,
Chris@356 58 float minval, float maxval,
Chris@464 59 QString m_unit = "", bool inverted = false);
Chris@189 60
Chris@356 61 static void convertRatioMinLog(float ratio, float minlog,
Chris@356 62 int minpos, int maxpos,
Chris@356 63 float &minval, float &maxval);
Chris@356 64
Chris@356 65 static void convertMinMax(int minpos, int maxpos,
Chris@356 66 float minval, float maxval,
Chris@356 67 float &ratio, float &minlog);
Chris@356 68
Chris@189 69 virtual int getPositionForValue(float value) const;
Chris@189 70 virtual float getValueForPosition(int position) const;
Chris@189 71
Chris@189 72 virtual QString getUnit() const { return m_unit; }
Chris@189 73
Chris@189 74 protected:
Chris@189 75 int m_minpos;
Chris@189 76 int m_maxpos;
Chris@189 77 float m_ratio;
Chris@189 78 float m_minlog;
Chris@189 79 float m_maxlog;
Chris@189 80 QString m_unit;
Chris@464 81 bool m_inverted;
Chris@189 82 };
Chris@189 83
Chris@189 84
Chris@189 85 #endif