131 lines
3.4 KiB
C++
131 lines
3.4 KiB
C++
//=============================================================================
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// MuseScore
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// Music Composition & Notation
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//
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// Copyright (C) 2014 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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#include "keylist.h"
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#include "xml.h"
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#include "score.h"
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namespace Ms {
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//---------------------------------------------------------
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// key
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//
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// locates the key sig currently in effect at tick
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//---------------------------------------------------------
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KeySigEvent KeyList::key(int tick) const
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{
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KeySigEvent ke;
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ke.setKey(Key::C);
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if (empty())
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return ke;
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auto i = upper_bound(tick);
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if (i == begin())
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return ke;
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return (--i)->second;
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}
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//---------------------------------------------------------
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// setKey
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//---------------------------------------------------------
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void KeyList::setKey(int tick, KeySigEvent k)
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{
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auto i = find(tick);
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if (i == end())
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insert(std::pair<int, KeySigEvent>(tick, k));
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else
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i->second = k;
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}
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//---------------------------------------------------------
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// nextKeyTick
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//
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// return the tick at which the key sig after tick is located
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// return -1, if no such a key sig
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//---------------------------------------------------------
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int KeyList::nextKeyTick(int tick) const
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{
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if (empty())
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return -1;
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auto i = upper_bound(tick+1);
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return i == end() ? -1 : i->first;
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}
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//---------------------------------------------------------
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// prevKey
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//
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// returns the key before the current key for tick
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//---------------------------------------------------------
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KeySigEvent KeyList::prevKey(int tick) const
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{
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KeySigEvent kc;
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kc.setKey(Key::C);
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if (empty())
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return kc;
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auto i = upper_bound(tick);
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if (i == begin())
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return kc;
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--i;
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if (i == begin())
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return kc;
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return (--i)->second;
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}
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//---------------------------------------------------------
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// currentKeyTick
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//
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// return the tick position of the key currently
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// in effect at tick
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//---------------------------------------------------------
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int KeyList::currentKeyTick(int tick) const
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{
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if (empty())
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return 0;
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auto i = upper_bound(tick);
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if (i == begin())
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return 0;
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--i;
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return i->first;
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}
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//---------------------------------------------------------
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// KeyList::read
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//---------------------------------------------------------
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void KeyList::read(XmlReader& e, Score* cs)
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{
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while (e.readNextStartElement()) {
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if (e.name() == "key") {
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Key k;
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int tick = e.intAttribute("tick", 0);
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if (e.hasAttribute("custom"))
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k = Key::C; // ke.setCustomType(e.intAttribute("custom"));
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else
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k = Key(e.intAttribute("idx"));
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KeySigEvent ke;
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ke.setKey(k);
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(*this)[cs->fileDivision(tick)] = ke;
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e.readNext();
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}
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else
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e.unknown();
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}
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}
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}
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