view data/model/NoteModel.h @ 1455:ec9e65fcf749

The use of the begin/end pairs here just seems to cause too many rows to be deleted (from the visual representation, not the underlying model). Things apparently work better if we just modify the underlying model and let the change signals percolate back up again. To that end, update the change handlers so as to cover their proper ranges with dataChanged signals.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _NOTE_MODEL_H_
#define _NOTE_MODEL_H_

#include "IntervalModel.h"
#include "NoteData.h"
#include "base/RealTime.h"
#include "base/PlayParameterRepository.h"
#include "base/Pitch.h"

/**
 * NoteModel -- a concrete IntervalModel for notes.
 */

/**
 * Note type for use in a sparse model.  All we mean by a "note" is
 * something that has an onset time, a single value, a duration, and a
 * level.  Like other points, it can also have a label.  With this
 * point type, the model can be thought of as representing a simple
 * MIDI-type piano roll, except that the y coordinates (values) do not
 * have to be discrete integers.
 */

struct Note
{
public:
    Note(sv_frame_t _frame) : frame(_frame), value(0.0f), duration(0), level(1.f) { }
    Note(sv_frame_t _frame, float _value, sv_frame_t _duration, float _level, QString _label) :
        frame(_frame), value(_value), duration(_duration), level(_level), label(_label) { }

    int getDimensions() const { return 3; }

    sv_frame_t frame;
    float value;
    sv_frame_t duration;
    float level;
    QString label;

    QString getLabel() const { return label; }
    
    void toXml(QTextStream &stream,
               QString indent = "",
               QString extraAttributes = "") const
    {
        stream <<
            QString("%1<point frame=\"%2\" value=\"%3\" duration=\"%4\" level=\"%5\" label=\"%6\" %7/>\n")
            .arg(indent).arg(frame).arg(value).arg(duration).arg(level)
            .arg(XmlExportable::encodeEntities(label)).arg(extraAttributes);
    }

    QString toDelimitedDataString(QString delimiter, DataExportOptions opts, sv_samplerate_t sampleRate) const {
        QStringList list;
        list << RealTime::frame2RealTime(frame, sampleRate).toString().c_str();
        list << QString("%1").arg(value);
        list << RealTime::frame2RealTime(duration, sampleRate).toString().c_str();
        if (!(opts & DataExportOmitLevels)) {
            list << QString("%1").arg(level);
        }
        if (label != "") list << label;
        return list.join(delimiter);
    }

    struct Comparator {
        bool operator()(const Note &p1,
                        const Note &p2) const {
            if (p1.frame != p2.frame) return p1.frame < p2.frame;
            if (p1.value != p2.value) return p1.value < p2.value;
            if (p1.duration != p2.duration) return p1.duration < p2.duration;
            if (p1.level != p2.level) return p1.level < p2.level;
            return p1.label < p2.label;
        }
    };
    
    struct OrderComparator {
        bool operator()(const Note &p1,
                        const Note &p2) const {
            return p1.frame < p2.frame;
        }
    };
};


class NoteModel : public IntervalModel<Note>, public NoteExportable
{
    Q_OBJECT
    
public:
    NoteModel(sv_samplerate_t sampleRate, int resolution,
              bool notifyOnAdd = true) :
        IntervalModel<Note>(sampleRate, resolution, notifyOnAdd),
        m_valueQuantization(0)
    {
        PlayParameterRepository::getInstance()->addPlayable(this);
    }

    NoteModel(sv_samplerate_t sampleRate, int resolution,
              float valueMinimum, float valueMaximum,
              bool notifyOnAdd = true) :
        IntervalModel<Note>(sampleRate, resolution,
                            valueMinimum, valueMaximum,
                            notifyOnAdd),
        m_valueQuantization(0)
    {
        PlayParameterRepository::getInstance()->addPlayable(this);
    }

    virtual ~NoteModel()
    {
        PlayParameterRepository::getInstance()->removePlayable(this);
    }

    float getValueQuantization() const { return m_valueQuantization; }
    void setValueQuantization(float q) { m_valueQuantization = q; }

    QString getTypeName() const { return tr("Note"); }

    virtual bool canPlay() const { return true; }

    virtual QString getDefaultPlayClipId() const
    {
        return "elecpiano";
    }

    virtual void toXml(QTextStream &out,
                       QString indent = "",
                       QString extraAttributes = "") const
    {
        std::cerr << "NoteModel::toXml: extraAttributes = \"" 
                  << extraAttributes.toStdString() << std::endl;

        IntervalModel<Note>::toXml
            (out,
             indent,
             QString("%1 subtype=\"note\" valueQuantization=\"%2\"")
             .arg(extraAttributes).arg(m_valueQuantization));
    }

    /**
     * TabularModel methods.  
     */
    
    virtual int getColumnCount() const
    {
        return 6;
    }

    virtual QString getHeading(int column) const
    {
        switch (column) {
        case 0: return tr("Time");
        case 1: return tr("Frame");
        case 2: return tr("Pitch");
        case 3: return tr("Duration");
        case 4: return tr("Level");
        case 5: return tr("Label");
        default: return tr("Unknown");
        }
    }

    virtual QVariant getData(int row, int column, int role) const
    {
        if (column < 4) {
            return IntervalModel<Note>::getData(row, column, role);
        }

        PointListConstIterator i = getPointListIteratorForRow(row);
        if (i == m_points.end()) return QVariant();

        switch (column) {
        case 4: return i->level;
        case 5: return i->label;
        default: return QVariant();
        }
    }

    virtual Command *getSetDataCommand(int row, int column, const QVariant &value, int role)
    {
        if (column < 4) {
            return IntervalModel<Note>::getSetDataCommand
                (row, column, value, role);
        }

        if (role != Qt::EditRole) return 0;
        PointListConstIterator i = getPointListIteratorForRow(row);
        if (i == m_points.end()) return 0;
        EditCommand *command = new EditCommand(this, tr("Edit Data"));

        Point point(*i);
        command->deletePoint(point);

        switch (column) {
        case 4: point.level = float(value.toDouble()); break;
        case 5: point.label = value.toString(); break;
        }

        command->addPoint(point);
        return command->finish();
    }

    virtual SortType getSortType(int column) const
    {
        if (column == 5) return SortAlphabetical;
        return SortNumeric;
    }

    /**
     * NoteExportable methods.
     */

    NoteList getNotes() const {
        return getNotesWithin(getStartFrame(), getEndFrame());
    }

    NoteList getNotesWithin(sv_frame_t startFrame, sv_frame_t endFrame) const {
        
        PointList points = getPoints(startFrame, endFrame);
        NoteList notes;

        for (PointList::iterator pli =
                 points.begin(); pli != points.end(); ++pli) {

            sv_frame_t duration = pli->duration;
            if (duration == 0 || duration == 1) {
                duration = sv_frame_t(getSampleRate() / 20);
            }

            int pitch = int(lrintf(pli->value));
            
            int velocity = 100;
            if (pli->level > 0.f && pli->level <= 1.f) {
                velocity = int(lrintf(pli->level * 127));
            }

            NoteData note(pli->frame, duration, pitch, velocity);

            if (getScaleUnits() == "Hz") {
                note.frequency = pli->value;
                note.midiPitch = Pitch::getPitchForFrequency(note.frequency);
                note.isMidiPitchQuantized = false;
            }
        
            notes.push_back(note);
        }
        
        return notes;
    }

protected:
    float m_valueQuantization;
};

#endif