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