view data/model/SparseTimeValueModel.h @ 875:3e6ed8a8577b tonioni

Use a sparse time-value model only for outputs with fixed bin count of 1, not for those with unknown bin count.
(Precursor to using more than one model for outputs with unknown bin count)

/* -*- 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 _SPARSE_TIME_VALUE_MODEL_H_
#define _SPARSE_TIME_VALUE_MODEL_H_

#include "SparseValueModel.h"
#include "base/PlayParameterRepository.h"
#include "base/RealTime.h"

/**
 * Time/value point type for use in a SparseModel or SparseValueModel.
 * With this point type, the model basically represents a wiggly-line
 * plot with points at arbitrary intervals of the model resolution.
 */

struct TimeValuePoint
{
public:
    TimeValuePoint(long _frame) : frame(_frame), value(0.0f) { }
    TimeValuePoint(long _frame, float _value, QString _label) : 
	frame(_frame), value(_value), label(_label) { }

    int getDimensions() const { return 2; }
    
    long frame;
    float value;
    QString label;

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

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


class SparseTimeValueModel : public SparseValueModel<TimeValuePoint>
{
    Q_OBJECT
    
public:
    SparseTimeValueModel(size_t sampleRate, size_t resolution,
			 bool notifyOnAdd = true) :
	SparseValueModel<TimeValuePoint>(sampleRate, resolution,
					 notifyOnAdd)
    {
        // Model is playable, but may not sound (if units not Hz or
        // range unsuitable)
	PlayParameterRepository::getInstance()->addPlayable(this);
    }

    SparseTimeValueModel(size_t sampleRate, size_t resolution,
			 float valueMinimum, float valueMaximum,
			 bool notifyOnAdd = true) :
	SparseValueModel<TimeValuePoint>(sampleRate, resolution,
					 valueMinimum, valueMaximum,
					 notifyOnAdd)
    {
        // Model is playable, but may not sound (if units not Hz or
        // range unsuitable)
	PlayParameterRepository::getInstance()->addPlayable(this);
    }

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

    QString getTypeName() const { return tr("Sparse Time-Value"); }

    virtual bool canPlay() const { return true; }

    /**
     * TabularModel methods.  
     */
    
    virtual int getColumnCount() const
    {
        return 4;
    }

    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("Label");
        default: return tr("Unknown");
        }
    }

    virtual QVariant getData(int row, int column, int role) const
    {
        if (column < 2) {
            return SparseValueModel<TimeValuePoint>::getData
                (row, column, role);
        }

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

        switch (column) {
        case 2:
            if (role == Qt::EditRole || role == SortRole) return i->value;
            else return QString("%1 %2").arg(i->value).arg(getScaleUnits());
        case 3: return i->label;
        default: return QVariant();
        }
    }

    virtual Command *getSetDataCommand(int row, int column, const QVariant &value, int role)
    {
        if (column < 2) {
            return SparseValueModel<TimeValuePoint>::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 2: point.value = value.toDouble(); break;
        case 3: point.label = value.toString(); break;
        }

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

    virtual bool isColumnTimeValue(int column) const
    {
        return (column < 2); 
    }

    virtual SortType getSortType(int column) const
    {
        if (column == 3) return SortAlphabetical;
        return SortNumeric;
    }
};


#endif