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//=============================================================================
// MuseScore
// Music Composition & Notation
//
// Copyright (C) 2002-2009 Werner Schweer
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2
// as published by the Free Software Foundation and appearing in
// the file LICENCE.GPL
//=============================================================================
#ifndef __AL_SIG_H__
#define __AL_SIG_H__
#include "fraction.h"
namespace Ms {
class Xml;
class XmlReader;
//-------------------------------------------------------------------
// Time Signature Event
// Incomplete measures as for example pickup measures have
// a nominal duration different from actual duration.
//-------------------------------------------------------------------
class SigEvent {
Fraction _timesig;
Fraction _nominal;
int _bar; ///< precomputed value
public:
int read(XmlReader&, int fileDivision);
void write(Xml&, int) const;
SigEvent() : _timesig(0, 0) {} ///< default SigEvent is invalid
SigEvent(const Fraction& s, int bar = 0)
: _timesig(s), _nominal(s), _bar(bar) {}
SigEvent(const Fraction& s, const Fraction& ss, int bar = 0)
: _timesig(s), _nominal(ss), _bar(bar) {}
SigEvent(const SigEvent& e);
bool operator==(const SigEvent& e) const;
bool valid() const { return _timesig.isValid(); }
QString print() const { return _timesig.print(); }
Fraction timesig() const { return _timesig; }
Fraction nominal() const { return _nominal; }
void setNominal(const Fraction& f) { _nominal = f; }
int bar() const { return _bar; }
void setBar(int val) { _bar = val; }
};
//---------------------------------------------------------
// SigList
//---------------------------------------------------------
class TimeSigMap : public std::map<int, SigEvent > {
void normalize();
public:
TimeSigMap() {}
void add(int tick, const Fraction&);
void add(int tick, const SigEvent& ev);
void del(int tick);
void read(XmlReader&, int fileDiv);
void write(Xml&) const;
void dump() const;
const SigEvent& timesig(int tick) const;
void tickValues(int t, int* bar, int* beat, int* tick) const;
int bar2tick(int bar, int beat) const;
QString pos(int t) const;
unsigned raster(unsigned tick, int raster) const;
unsigned raster1(unsigned tick, int raster) const; // round down
unsigned raster2(unsigned tick, int raster) const; // round up
int rasterStep(unsigned tick, int raster) const;
};
} // namespace Ms
#endif
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