view data/model/SparseTimeValueModel.h @ 490:c3fb8258e34d

* Make it possible to import an entire session from an RDF document.
  However, at the moment the timings of events appear to be constrained
  by how far the audio decoder has got through its audio file at the
  time the event is queried -- need to investigate.

/* -*- 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(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)
    {
        // not yet playable
    }

    SparseTimeValueModel(size_t sampleRate, size_t resolution,
			 float valueMinimum, float valueMaximum,
			 bool notifyOnAdd = true) :
	SparseValueModel<TimeValuePoint>(sampleRate, resolution,
					 valueMinimum, valueMaximum,
					 notifyOnAdd)
    {
        // not yet playable
    }

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

    /**
     * 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);
        }

        PointListIterator 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 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 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