C++ Chord::setDuration方法代码示例

void MTrack::processPendingNotes(QList<MidiChord> &midiChords,
                                 int voice,
                                 const Fraction &startChordTickFrac,
                                 const Fraction &nextChordTick)
      {
      Score* score     = staff->score();
      int track        = staff->idx() * VOICES + voice;
      Drumset* drumset = staff->part()->instr()->drumset();
      bool useDrumset  = staff->part()->instr()->useDrumset();
                  // all midiChords here should have the same onTime value
                  // and all notes in each midiChord should have the same duration
      Fraction startChordTick = startChordTickFrac;
      while (!midiChords.isEmpty()) {
            Fraction tick = startChordTick;
            Fraction len = nextChordTick - tick;
            if (len <= Fraction(0))
                  break;
            len = findMinDuration(midiChords, len);
            Measure* measure = score->tick2measure(tick.ticks());
            len = splitDurationOnBarBoundary(len, tick, measure);

            auto dl = toDurationList(measure, voice, tick, len, Meter::DurationType::NOTE);
            if (dl.isEmpty())
                  break;
            const TDuration &d = dl[0].second;
            const Fraction &tupletRatio = dl[0].first;
            len = d.fraction() / tupletRatio;

            Chord* chord = new Chord(score);
            chord->setTrack(track);
            chord->setDurationType(d);
            chord->setDuration(d.fraction());
            Segment* s = measure->getSegment(chord, tick.ticks());
            s->add(chord);
            chord->setUserPlayEvents(true);
            addElementToTuplet(voice, tick, len, chord);

            for (int k = 0; k < midiChords.size(); ++k) {
                  MidiChord& midiChord = midiChords[k];
                  setMusicNotesFromMidi(score, midiChord.notes, startChordTick,
                                        len, chord, tick, drumset, useDrumset);
                  if (!midiChord.notes.empty() && midiChord.notes.first().len <= len) {
                        midiChords.removeAt(k);
                        --k;
                        continue;
                        }
                  setTies(chord, score, midiChord.notes);
                  for (auto &midiNote: midiChord.notes)
                        midiNote.len -= len;
                  }
            startChordTick += len;
            }
      fillGapWithRests(score, voice, startChordTick,
                       nextChordTick - startChordTick, track);
      }

Chord* MCursor::addChord(int pitch, const TDuration& duration)
      {
      createMeasures();
      Measure* measure = _score->tick2measure(_tick);
      Segment* segment = measure->getSegment(Segment::Type::ChordRest, _tick);
      Chord* chord = static_cast<Chord*>(segment->element(_track));
      if (chord == 0) {
            chord = new Chord(_score);
            chord->setTrack(_track);
            chord->setDurationType(duration);
            chord->setDuration(duration.fraction());
            segment->add(chord);
            }
      Note* note = new Note(_score);
      chord->add(note);
      note->setPitch(pitch);
      note->setTpcFromPitch();
      _tick += duration.ticks();
      return chord;
      }

void MsScWriter::note(const QString pitch, const QVector<Bww::BeamType> beamList,
                      const QString type, const int dots,
                      bool tieStart, bool /*TODO tieStop */,
                      StartStop triplet,
                      bool grace)
      {
      qDebug() << "MsScWriter::note()"
               << "type:" << type
               << "dots:" << dots
               << "grace" << grace
      ;

      if (!stepAlterOctMap.contains(pitch)
          || !typeMap.contains(type)) {
            // TODO: error message
            return;
            }
      StepAlterOct sao = stepAlterOctMap.value(pitch);

      int ticks = 4 * MScore::division / type.toInt();
      if (dots) ticks = 3 * ticks / 2;
      qDebug() << "ticks:" << ticks;
      TDuration durationType(TDuration::V_INVALID);
      durationType.setVal(ticks);
      qDebug() << "duration:" << durationType.name();
      if (triplet != ST_NONE) ticks = 2 * ticks / 3;

      BeamMode bm  = (beamList.at(0) == Bww::BM_BEGIN) ? BEAM_BEGIN : BEAM_AUTO;
      Direction sd = AUTO;

      // create chord
      Chord* cr = new Chord(score);
      //ws cr->setTick(tick);
      cr->setBeamMode(bm);
      cr->setTrack(0);
      if (grace) {
            cr->setNoteType(NOTE_GRACE32);
            cr->setDurationType(TDuration::V_32ND);
            sd = UP;
            }
      else {
            if (durationType.type() == TDuration::V_INVALID)
                  durationType.setType(TDuration::V_QUARTER);
            cr->setDurationType(durationType);
            sd = DOWN;
            }
      cr->setDuration(durationType.fraction());
      cr->setDots(dots);
      cr->setStemDirection(sd);
      // add note to chord
      Note* note = new Note(score);
      note->setTrack(0);
      xmlSetPitch(note, sao.s.toAscii(), sao.a, sao.o);
      if (tieStart) {
            Tie* tie = new Tie(score);
            note->setTieFor(tie);
            tie->setStartNote(note);
            tie->setTrack(0);
            }
      cr->add(note);
      // add chord to measure
      Segment* s = currentMeasure->getSegment(cr, tick);
      s->add(cr);
      if (!grace) {
            doTriplet(cr, triplet);
            int tickBefore = tick;
            tick += ticks;
            Fraction nl(Fraction::fromTicks(tick - currentMeasure->tick()));
            currentMeasure->setLen(nl);
            qDebug() << "MsScWriter::note()"
                     << "tickBefore:" << tickBefore
                     << "tick:" << tick
                     << "nl:" << nl.print()
            ;
            }
      }