1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ 2 3 /* 4 Sonic Visualiser 5 An audio file viewer and annotation editor. 6 Centre for Digital Music, Queen Mary, University of London. 7 This file copyright 2006 Chris Cannam. 8 9 This program is free software; you can redistribute it and/or 10 modify it under the terms of the GNU General Public License as 11 published by the Free Software Foundation; either version 2 of the 12 License, or (at your option) any later version. See the file 13 COPYING included with this distribution for more information. 14 */ 15 16 #ifndef SV_UNIT_DATABASE_H 17 #define SV_UNIT_DATABASE_H 18 19 #include <QObject> 20 #include <QString> 21 #include <QStringList> 22 #include <map> 23 24 // This grandly named class is just a list of the names of known scale 25 // units for the various models, for use as the set of fixed values in 26 // unit dropdown menus etc. Of course, the user should be allowed to 27 // enter their own as well. 28 29 class UnitDatabase : public QObject 30 { 31 Q_OBJECT 32 33 public: 34 static UnitDatabase *getInstance(); 35 36 QStringList getKnownUnits() const; 37 void registerUnit(QString unit); 38 39 /** 40 * Return the reference id for a given unit name. If registerNew is 41 * true and the unit is not known, register it and return its new 42 * id. If register is false and the unit is not known, return -1. 43 */ 44 int getUnitId(QString unit, bool registerNew = true); 45 46 QString getUnitById(int id); 47 48 signals: 49 void unitDatabaseChanged(); 50 51 protected: 52 UnitDatabase(); 53 54 typedef std::map<QString, int> UnitMap; 55 UnitMap m_units; 56 int m_nextId; 57 58 static UnitDatabase m_instance; 59 }; 60 61 #endif 62 63