view data/fileio/DataFileReaderFactory.h @ 360:ac300d385ab2

* Various fixes to object lifetime management, particularly in the spectrum
  layer and for notification of main model deletion.
  The main purpose of this is to improve the behaviour of the spectrum, but I
  think it may also help with #1840922 Various crashes in Layer Summary window.

/* -*- 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 _DATA_FILE_READER_FACTORY_H_
#define _DATA_FILE_READER_FACTORY_H_

#include <QString>

class DataFileReader;
class Model;

class DataFileReaderFactory
{
public:
    enum Exception { ImportCancelled };

    /**
     * Return the file extensions that we have data file readers for,
     * in a format suitable for use with QFileDialog.  For example,
     * "*.csv *.xml".
     */
    static QString getKnownExtensions();

    /**
     * Return a data file reader initialised to the file at the
     * given path, or NULL if no suitable reader for this path is
     * available or the file cannot be opened.
     * Caller owns the returned object and must delete it after use.
     */
    static DataFileReader *createReader(QString path,
					size_t mainModelSampleRate);

    /**
     * Read the given path, if a suitable reader is available.
     * Return NULL if no reader succeeded in reading this file.
     */
    static Model *load(QString path, size_t mainModelSampleRate);
};

#endif