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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
/*
Sonic Visualiser
An audio file viewer and annotation editor.
Centre for Digital Music, Queen Mary, University of London.
This file copyright 2006 Chris Cannam.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version. See the file
COPYING included with this distribution for more information.
*/
#include "UnitDatabase.h"
namespace sv {
UnitDatabase
UnitDatabase::m_instance;
UnitDatabase *
UnitDatabase::getInstance()
{
return &m_instance;
}
UnitDatabase::UnitDatabase() :
m_nextId(0)
{
}
QStringList
UnitDatabase::getKnownUnits() const
{
QStringList list;
for (UnitMap::const_iterator i = m_units.begin(); i != m_units.end(); ++i) {
list.push_back(i->first);
}
return list;
}
void
UnitDatabase::registerUnit(QString unit)
{
if (m_units.find(unit) == m_units.end()) {
m_units[unit] = m_nextId++;
emit unitDatabaseChanged();
}
}
int
UnitDatabase::getUnitId(QString unit, bool registerNew)
{
if (m_units.find(unit) == m_units.end()) {
if (registerNew) registerUnit(unit);
else return -1;
}
return m_units.at(unit);
}
QString
UnitDatabase::getUnitById(int id)
{
for (UnitMap::const_iterator i = m_units.begin(); i != m_units.end(); ++i) {
if (i->second == id) return i->first;
}
return "";
}
UnitDatabase::Quantity
UnitDatabase::getUnitQuantity(QString unit)
{
if (unit == "W" || unit == "V^2") {
return Quantity::Power;
} else if (unit == "V") {
return Quantity::RootPower;
} else {
return Quantity::Other;
}
}
QString
UnitDatabase::asCommonUnit(QString unit)
{
unit = unit.toLower();
if (unit == "hz" || unit == "hertz") return "Hz";
if (unit == "v" || unit == "volt" || unit == "volts") return "V";
if (unit == "db" || unit == "decibel" || unit == "decibels") return "dB";
if (unit == "s" || unit == "sec" || unit == "second" || unit == "seconds")
return "s";
return {};
}
} // end namespace sv
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