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134 lines
3.7 KiB
134 lines
3.7 KiB
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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Rosegarden
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A MIDI and audio sequencer and musical notation editor.
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This program is Copyright 2000-2008
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Guillaume Laurent <glaurent@telegraph-road.org>,
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Chris Cannam <cannam@all-day-breakfast.com>,
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Richard Bown <richard.bown@ferventsoftware.com>
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The moral rights of Guillaume Laurent, Chris Cannam, and Richard
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Bown to claim authorship of this work have been asserted.
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Other copyrights also apply to some parts of this work. Please
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see the AUTHORS file and individual file headers for details.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#ifndef _RG_NOTATIONGROUP_H_
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#define _RG_NOTATIONGROUP_H_
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#include "base/Sets.h"
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#include <utility>
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#include "base/Event.h"
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#include "NotationElement.h"
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namespace Rosegarden
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{
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class Quantizer;
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class NotationStaff;
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class NotationProperties;
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class Key;
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class Clef;
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/// Several sorts of "Beamed Group"
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class NotationGroup : public AbstractSet<NotationElement,
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NotationElementList>
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{
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public:
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typedef NotationElementList::iterator NELIterator;
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enum Type { Beamed, Tupled };
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/// Group contents will be sampled from elements surrounding elementInGroup
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NotationGroup(NotationElementList &nel, NELIterator elementInGroup,
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const Quantizer *,
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std::pair<timeT, timeT> barRange,
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const NotationProperties &properties,
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const Clef &clef, const Key &key);
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/// Caller intends to call sample() for each item in the group, _in order_
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NotationGroup(NotationElementList &nel,
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const Quantizer *,
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const NotationProperties &properties,
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const Clef &clef, const Key &key);
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virtual ~NotationGroup();
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Type getGroupType() const { return m_type; }
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/**
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* Writes the BEAMED, BEAM_ABOVE, and STEM_UP properties into the
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* notes in the group, as appropriate. Does not require tqlayout x
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* coordinates to have been set.
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*/
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void applyStemProperties();
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/**
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* Writes beam data into each note in the group. Notes' tqlayout x
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* coordinates must already have been set. Does not require
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* applyStemProperties to have already been called.
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*/
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void applyBeam(NotationStaff &);
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/**
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* Writes tupling line data into each note in the group. Notes'
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* tqlayout x coordinates must already have been set. Does nothing
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* if this is not a tupled group.
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*/
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void applyTuplingLine(NotationStaff &);
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virtual bool contains(const NELIterator &) const;
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virtual bool sample(const NELIterator &i, bool goingForwards);
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protected:
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virtual bool test(const NELIterator &i);
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private:
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struct Beam
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{ // if a beam has a line equation y = mx + c,
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int gradient; // -- then this is m*100 (i.e. a percentage)
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int startY; // -- and this is c
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bool aboveNotes;
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bool necessary;
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};
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Beam calculateBeam(NotationStaff &);
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int height(const NELIterator&) const;
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bool haveInternalRest() const;
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//--------------- Data members ---------------------------------
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std::pair<timeT, timeT> m_barRange;
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const Clef &m_clef;
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const Key &m_key;
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int m_weightAbove, m_weightBelow;
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bool m_userSamples;
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long m_groupNo;
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Type m_type;
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const NotationProperties &m_properties;
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};
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}
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#endif
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