94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
//=============================================================================
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// MusE Score
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// Linux Music Score Editor
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// $Id: sig.h 5221 2012-01-16 15:09:25Z wschweer $
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//
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// Copyright (C) 2002-2009 Werner Schweer and others
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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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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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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class Xml;
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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(const QDomElement&, 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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typedef std::map<const int, SigEvent>::iterator iSigEvent;
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typedef std::map<const int, SigEvent>::const_iterator ciSigEvent;
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class TimeSigMap : public std::map<const 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(const QDomElement&, 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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const char* 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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#endif
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