view data/model/RegionModel.h @ 537:3cc4b7cd2aa5

* Merge from one-fftdataserver-per-fftmodel branch.  This bit of
reworking (which is not described very accurately by the title of
the branch) turns the MatrixFile object into something that either
reads or writes, but not both, and separates the FFT file cache
reader and writer implementations separately.  This allows the
FFT data server to have a single thread owning writers and one reader
per "customer" thread, and for all locking to be vastly simplified
and concentrated in the data server alone (because none of the
classes it makes use of is used in more than one thread at a time).
The result is faster and more trustworthy code.

/* -*- 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 _REGION_MODEL_H_
#define _REGION_MODEL_H_

#include "IntervalModel.h"
#include "base/RealTime.h"

/**
 * RegionModel -- a concrete IntervalModel for intervals associated
 * with a value, which we call regions for no very compelling reason.
 */

/**
 * Region "point" type.  A region is something that has an onset time,
 * a single value, and a duration.  Like other points, it can also
 * have a label.
 *
 * This is called RegionRec instead of Region to avoid name collisions
 * with the X11 Region struct.  Bah.
 */

struct RegionRec
{
public:
    RegionRec(long _frame) : frame(_frame), value(0.0f), duration(0) { }
    RegionRec(long _frame, float _value, size_t _duration, QString _label) :
	frame(_frame), value(_value), duration(_duration), label(_label) { }

    int getDimensions() const { return 3; }

    long frame;
    float value;
    size_t duration;
    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\" label=\"%5\" %6/>\n")
	    .arg(indent).arg(frame).arg(value).arg(duration).arg(label).arg(extraAttributes);
    }

    QString toDelimitedDataString(QString delimiter, size_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 (label != "") list << label;
        return list.join(delimiter);
    }

    struct Comparator {
	bool operator()(const RegionRec &p1,
			const RegionRec &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;
	    return p1.label < p2.label;
	}
    };
    
    struct OrderComparator {
	bool operator()(const RegionRec &p1,
			const RegionRec &p2) const {
	    return p1.frame < p2.frame;
	}
    };
};


class RegionModel : public IntervalModel<RegionRec>
{
    Q_OBJECT
    
public:
    RegionModel(size_t sampleRate, size_t resolution,
                bool notifyOnAdd = true) :
	IntervalModel<RegionRec>(sampleRate, resolution, notifyOnAdd),
	m_valueQuantization(0),
        m_haveDistinctValues(false)
    {
    }

    RegionModel(size_t sampleRate, size_t resolution,
                float valueMinimum, float valueMaximum,
                bool notifyOnAdd = true) :
	IntervalModel<RegionRec>(sampleRate, resolution,
                            valueMinimum, valueMaximum,
                            notifyOnAdd),
	m_valueQuantization(0),
        m_haveDistinctValues(false)
    {
    }

    virtual ~RegionModel()
    {
    }

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

    bool haveDistinctValues() const { return m_haveDistinctValues; }

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

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

        IntervalModel<RegionRec>::toXml
	    (out,
             indent,
	     QString("%1 subtype=\"region\" 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("Value");
        case 3: return tr("Duration");
        case 4: return tr("Label");
        default: return tr("Unknown");
        }
    }

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

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

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

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

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

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

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

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

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

    virtual void addPoint(const Point &point)
    {
        if (point.value != 0.f) m_haveDistinctValues = true;
        IntervalModel<RegionRec>::addPoint(point);
    }
    
protected:
    float m_valueQuantization;
    bool m_haveDistinctValues;
};

#endif