annotate data/model/RegionModel.h @ 1649:1cc9a0d4b1b6 single-point

Update RegionModel following NoteModel, er, model. They have quite a bit in common that we should now pull out some of

/* -*- 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 SV_REGION_MODEL_H
#define SV_REGION_MODEL_H

#include "EventCommands.h"
#include "TabularModel.h"
#include "Model.h"

#include "base/RealTime.h"
#include "base/EventSeries.h"
#include "base/UnitDatabase.h"

#include "system/System.h"

#include <QMutex>

/**
 * RegionModel -- a model for intervals associated with a value, which
 * we call regions for no very compelling reason.
 */
class RegionModel : public Model,
                    public TabularModel,
                    public EventEditable
{
    Q_OBJECT
    
public:
    RegionModel(sv_samplerate_t sampleRate,
                int resolution,
                bool notifyOnAdd = true) :
        m_sampleRate(sampleRate),
        m_resolution(resolution),
        m_valueMinimum(0.f),
        m_valueMaximum(0.f),
        m_haveExtents(false),
        m_valueQuantization(0),
        m_haveDistinctValues(false),
        m_notifyOnAdd(notifyOnAdd),
        m_sinceLastNotifyMin(-1),
        m_sinceLastNotifyMax(-1),
        m_completion(0) {
    }

    RegionModel(sv_samplerate_t sampleRate, int resolution,
                float valueMinimum, float valueMaximum,
                bool notifyOnAdd = true) :
        m_sampleRate(sampleRate),
        m_resolution(resolution),
        m_valueMinimum(valueMinimum),
        m_valueMaximum(valueMaximum),
        m_haveExtents(false),
        m_valueQuantization(0),
        m_haveDistinctValues(false),
        m_notifyOnAdd(notifyOnAdd),
        m_sinceLastNotifyMin(-1),
        m_sinceLastNotifyMax(-1),
        m_completion(0) {
    }

    virtual ~RegionModel() {
    }

    QString getTypeName() const override { return tr("Region"); }

    bool isOK() const override { return true; }
    sv_frame_t getStartFrame() const override { return m_events.getStartFrame(); }
    sv_frame_t getEndFrame() const override { return m_events.getEndFrame(); }
    sv_samplerate_t getSampleRate() const override { return m_sampleRate; }
    int getResolution() const { return m_resolution; }

    QString getScaleUnits() const { return m_units; }
    void setScaleUnits(QString units) {
        m_units = units;
        UnitDatabase::getInstance()->registerUnit(units);
    }

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

    bool haveDistinctValues() const { return m_haveDistinctValues; }

    float getValueMinimum() const { return m_valueMinimum; }
    float getValueMaximum() const { return m_valueMaximum; }
    
    int getCompletion() const { return m_completion; }

    void setCompletion(int completion, bool update = true) {

        bool emitCompletionChanged = true;
        bool emitGeneralModelChanged = false;
        bool emitRegionChanged = false;

        {
            QMutexLocker locker(&m_mutex);

            if (m_completion != completion) {
                m_completion = completion;

                if (completion == 100) {

                    if (m_notifyOnAdd) {
                        emitCompletionChanged = false;
                    }

                    m_notifyOnAdd = true; // henceforth
                    emitGeneralModelChanged = true;

                } else if (!m_notifyOnAdd) {

                    if (update &&
                        m_sinceLastNotifyMin >= 0 &&
                        m_sinceLastNotifyMax >= 0) {
                        emitRegionChanged = true;
                    }
                }
            }
        }

        if (emitCompletionChanged) {
            emit completionChanged();
        }
        if (emitGeneralModelChanged) {
            emit modelChanged();
        }
        if (emitRegionChanged) {
            emit modelChangedWithin(m_sinceLastNotifyMin, m_sinceLastNotifyMax);
            m_sinceLastNotifyMin = m_sinceLastNotifyMax = -1;
        }        
    }

    /**
     * Query methods.
     */

    int getEventCount() const {
        return m_events.count();
    }
    bool isEmpty() const {
        return m_events.isEmpty();
    }
    bool containsEvent(const Event &e) const {
        return m_events.contains(e);
    }
    EventVector getAllEvents() const {
        return m_events.getAllEvents();
    }
    EventVector getEventsSpanning(sv_frame_t f, sv_frame_t duration) const {
        return m_events.getEventsSpanning(f, duration);
    }
    EventVector getEventsWithin(sv_frame_t f, sv_frame_t duration) const {
        return m_events.getEventsWithin(f, duration);
    }
    EventVector getEventsStartingWithin(sv_frame_t f, sv_frame_t duration) const {
        return m_events.getEventsStartingWithin(f, duration);
    }
    EventVector getEventsCovering(sv_frame_t f) const {
        return m_events.getEventsCovering(f);
    }

    /**
     * Editing methods.
     */
    void add(Event e) override {

        bool allChange = false;
           
        {
            QMutexLocker locker(&m_mutex);
            m_events.add(e);
//!!!???        if (point.getLabel() != "") m_hasTextLabels = true;

            float v = e.getValue();
            if (!ISNAN(v) && !ISINF(v)) {
                if (!m_haveExtents || v < m_valueMinimum) {
                    m_valueMinimum = v; allChange = true;
                }
                if (!m_haveExtents || v > m_valueMaximum) {
                    m_valueMaximum = v; allChange = true;
                }
                m_haveExtents = true;
            }

            if (e.hasValue() && e.getValue() != 0.f) {
                m_haveDistinctValues = true;
            }
            
            sv_frame_t f = e.getFrame();

            if (!m_notifyOnAdd) {
                if (m_sinceLastNotifyMin == -1 || f < m_sinceLastNotifyMin) {
                    m_sinceLastNotifyMin = f;
                }
                if (m_sinceLastNotifyMax == -1 || f > m_sinceLastNotifyMax) {
                    m_sinceLastNotifyMax = f;
                }
            }
        }
        
        if (m_notifyOnAdd) {
            emit modelChangedWithin(e.getFrame(),
                                    e.getFrame() + e.getDuration() + m_resolution);
        }
        if (allChange) {
            emit modelChanged();
        }
    }
    
    void remove(Event e) override {
        {
            QMutexLocker locker(&m_mutex);
            m_events.remove(e);
        }
        emit modelChangedWithin(e.getFrame(),
                                e.getFrame() + e.getDuration() + m_resolution);
    }
    
    /**
     * TabularModel methods.  
     */

    int getRowCount() const override {
        return m_events.count();
    }

    int getColumnCount() const override {
        return 5;
    }

    bool isColumnTimeValue(int column) const override {
        // NB duration is not a "time value" -- that's for columns
        // whose sort ordering is exactly that of the frame time
        return (column < 2);
    }

    sv_frame_t getFrameForRow(int row) const override {
        if (row < 0 || row >= m_events.count()) {
            return 0;
        }
        Event e = m_events.getEventByIndex(row);
        return e.getFrame();
    }

    int getRowForFrame(sv_frame_t frame) const override {
        return m_events.getIndexForEvent(Event(frame));
    }
    
    QString getHeading(int column) const override {
        switch (column) {
        case 0: return tr("Time");
        case 1: return tr("Frame");
        case 2: return tr("Value");
        case 3: return tr("Duration");
        case 4: return tr("Label");
        default: return tr("Unknown");
        }
    }

    QVariant getData(int row, int column, int role) const override {

        if (row < 0 || row >= m_events.count()) {
            return QVariant();
        }

        Event e = m_events.getEventByIndex(row);

        switch (column) {
        case 0: return adaptFrameForRole(e.getFrame(), getSampleRate(), role);
        case 1: return int(e.getFrame());
        case 2: return adaptValueForRole(e.getValue(), getScaleUnits(), role);
        case 3: return int(e.getDuration());
        case 4: return e.getLabel();
        default: return QVariant();
        }
    }

    Command *getSetDataCommand(int row, int column, const QVariant &value, int role) override {
        
        if (row < 0 || row >= m_events.count()) return nullptr;
        if (role != Qt::EditRole) return nullptr;

        Event e0 = m_events.getEventByIndex(row);
        Event e1;

        switch (column) {
        case 0: e1 = e0.withFrame(sv_frame_t(round(value.toDouble() *
                                                   getSampleRate()))); break;
        case 1: e1 = e0.withFrame(value.toInt()); break;
        case 2: e1 = e0.withValue(float(value.toDouble())); break;
        case 3: e1 = e0.withDuration(value.toInt()); break;
        case 4: e1 = e0.withLabel(value.toString()); break;
        }

        ChangeEventsCommand *command =
            new ChangeEventsCommand(this, tr("Edit Data"));
        command->remove(e0);
        command->add(e1);
        return command->finish();
    }

    SortType getSortType(int column) const override
    {
        if (column == 4) return SortAlphabetical;
        return SortNumeric;
    }

    
    /**
     * XmlExportable methods.
     */
    void toXml(QTextStream &out,
               QString indent = "",
               QString extraAttributes = "") const override {

        Model::toXml
            (out,
             indent,
             QString("type=\"sparse\" dimensions=\"3\" resolution=\"%1\" "
                     "notifyOnAdd=\"%2\" dataset=\"%3\" subtype=\"%4\" "
                     "valueQuantization=\"%5\" minimum=\"%6\" maximum=\"%7\" "
                     "%8")
             .arg(m_resolution)
             .arg(m_notifyOnAdd ? "true" : "false")
             .arg(getObjectExportId(&m_events))
             .arg("region")
             .arg(m_valueQuantization)
             .arg(m_valueMinimum)
             .arg(m_valueMaximum)
             .arg(extraAttributes));
        
        m_events.toXml(out, indent, QString("dimensions=\"3\""));
    }
    
protected:
    sv_samplerate_t m_sampleRate;
    int m_resolution;

    float m_valueMinimum;
    float m_valueMaximum;
    bool m_haveExtents;
    float m_valueQuantization;
    bool m_haveDistinctValues;
    QString m_units;
    
    bool m_notifyOnAdd;
    sv_frame_t m_sinceLastNotifyMin;
    sv_frame_t m_sinceLastNotifyMax;

    EventSeries m_events;

    int m_completion;

    mutable QMutex m_mutex;
};

#endif