annotate data/model/TextModel.h @ 299:576be0d0d218

* Merge transform directory from sv-match-alignment branch
  (the previous comment included notes for this stuff, but I missed it
  in the actual merge)
* Fix crash when a transform fails to create an output model and the
  thread that created the transform then deletes its input model thinking
  it's no longer needed, even though the transform run thread is still
  using it -- fix is to wait() on the transform before returning the
  null output model

/* -*- 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 _TEXT_MODEL_H_
#define _TEXT_MODEL_H_

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

/**
 * Text point type for use in a SparseModel.  This represents a piece
 * of text at a given time and y-value in the [0,1) range (indicative
 * of height on the window).  Intended for casual textual annotations.
 */

struct TextPoint
{
public:
    TextPoint(long _frame) : frame(_frame), height(0.0f) { }
    TextPoint(long _frame, float _height, QString _label) : 
	frame(_frame), height(_height), label(_label) { }

    int getDimensions() const { return 2; }
    
    long frame;
    float height;
    QString label;
    
    QString toXmlString(QString indent = "",
			QString extraAttributes = "") const
    {
	return QString("%1<point frame=\"%2\" height=\"%3\" label=\"%4\" %5/>\n")
	    .arg(indent).arg(frame).arg(height).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(height);
        list << label;
        return list.join(delimiter);
    }

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


// Make this a class rather than a typedef so it can be predeclared.

class TextModel : public SparseModel<TextPoint>
{
public:
    TextModel(size_t sampleRate, size_t resolution, bool notifyOnAdd = true) :
	SparseModel<TextPoint>(sampleRate, resolution, notifyOnAdd)
    { }

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


#endif