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qwavselection.h

/***************************************************************************
                          selection.h  -  description
                             -------------------
    begin                : Sun Dec 1 2002
    copyright            : (C) 2002 by Peter Eschler
    email                : eschler@users.sourceforge.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QwavSELECTION_H
#define QwavSELECTION_H

//---------------------------------------------------------------------------
// Includes: qt
//---------------------------------------------------------------------------

#include <qobject.h>


//---------------------------------------------------------------------------
// Includes: project
//---------------------------------------------------------------------------

#include "qwavdefines.h"


//---------------------------------------------------------------------------
// Class: QwavSelection
//---------------------------------------------------------------------------

Qwav_USING_NAMESPACE

Qwav_BEGIN_NAMESPACE

class QWAV_EXPORTIMPORT QwavSelection : public QObject
{
    Q_OBJECT
    Q_PROPERTY(long firstSample READ firstSample WRITE setFirstSample )
    Q_PROPERTY(long lastSample  READ lastSample  WRITE setLastSample )
    
public: 
    QwavSelection(long first=0, long last=0);
    QwavSelection( const QwavSelection& s);
    ~QwavSelection();

    inline void setFirstSample( const long& s);
    inline void setLastSample( const long& s);

    inline const long& firstSample() const;
    inline const long& lastSample() const;

    inline bool        isValid() const;
    inline void        swap();
    
    QwavSelection& operator= (const QwavSelection& s);
    bool       operator< (const QwavSelection& s);
    bool       operator!=(const QwavSelection& s);

    static QwavSelection NullSelection;    
private:
    long    _firstSample;
    long    _lastSample;        


};


//---------------------------------------------------------------------------
// Method: setFirstSample
//---------------------------------------------------------------------------
            
void QwavSelection::setFirstSample( const long& s)
{
    _firstSample = s;

    if( _firstSample < 0 )
        _firstSample = 0;
}


//---------------------------------------------------------------------------
// Method: setLastSample
//---------------------------------------------------------------------------
    
void QwavSelection::setLastSample( const long& s)
{
    _lastSample = s;
    if( _lastSample < 0 )
        _lastSample = 0;
    
}


//---------------------------------------------------------------------------
// Method: firstSample
//---------------------------------------------------------------------------

const long& QwavSelection::firstSample() const
{
    return _firstSample;
}


//---------------------------------------------------------------------------
// Method: lastSample
//---------------------------------------------------------------------------

const long& QwavSelection::lastSample() const
{
    return _lastSample;
}


//---------------------------------------------------------------------------
// Method: isValid
//---------------------------------------------------------------------------

bool QwavSelection::isValid() const
{
    if( _firstSample >=0 && _firstSample < _lastSample )
        return true;
    else
        return false;
}


//---------------------------------------------------------------------------
// Method: swap
//---------------------------------------------------------------------------

void QwavSelection::swap()
{
    long t = _firstSample;
    _firstSample = _lastSample;
    _lastSample = t;
}
    
Qwav_END_NAMESPACE

#endif // QwavSELECTION_H

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