view data/model/PathModel.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 2007 QMUL.
    
    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 _PATH_MODEL_H_
#define _PATH_MODEL_H_

#include "Model.h"
#include "SparseModel.h"
#include "base/RealTime.h"

#include <QStringList>


struct PathPoint
{
    PathPoint(long _frame) : frame(_frame), mapframe(_frame) { }
    PathPoint(long _frame, long _mapframe) :
        frame(_frame), mapframe(_mapframe) { }

    int getDimensions() const { return 2; }

    long frame;
    long mapframe;

    QString getLabel() const { return ""; }

    void toXml(QTextStream &stream, QString indent = "",
               QString extraAttributes = "") const {
        stream << QString("%1<point frame=\"%2\" mapframe=\"%3\" %4/>\n")
            .arg(indent).arg(frame).arg(mapframe).arg(extraAttributes);
    }
        
    QString toDelimitedDataString(QString delimiter,
                                  size_t sampleRate) const {
        QStringList list;
        list << RealTime::frame2RealTime(frame, sampleRate).toString().c_str();
        list << QString("%1").arg(mapframe);
        return list.join(delimiter);
    }

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

class PathModel : public SparseModel<PathPoint>
{
public:
    PathModel(size_t sampleRate, size_t resolution, bool notify = true) :
        SparseModel<PathPoint>(sampleRate, resolution, notify) { }

    virtual void toXml(QTextStream &out,
                       QString indent = "",
                       QString extraAttributes = "") const
    {
        SparseModel<PathPoint>::toXml
            (out, 
             indent,
             QString("%1 subtype=\"path\"")
             .arg(extraAttributes));
    }

    /**
     * TabularModel is inherited via SparseModel, but we don't need it here.
     */
    virtual QString getHeading(int) const { return ""; }
    virtual bool isColumnTimeValue(int) const { return false; }
    virtual SortType getSortType(int) const { return SortNumeric; }

};


#endif