view base/TempWriteFile.h @ 1247:8f076d02569a piper

Make SVDEBUG always write to a log file -- formerly this was disabled in NDEBUG builds. I think there's little use to that, it just means that we keep adding more cerr debug output because we aren't getting the log we need. And SVDEBUG logging is not usually used in tight loops, I don't think the performance overhead is too serious.

Also update the About box.

/* -*- 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 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 _TEMP_WRITE_FILE_H_
#define _TEMP_WRITE_FILE_H_

#include <QTemporaryFile>

/**
 * A class that manages the creation of a temporary file with a given
 * prefix and the renaming of that file to the prefix after use.  For
 * use when saving a file over an existing one, to avoid clobbering
 * the original before the save is complete.
 */

class TempWriteFile
{
public:
    TempWriteFile(QString targetFileName); // may throw FileOperationFailed

    /**
     * Destroy the temporary file object.  If moveToTarget has not
     * been called, the associated temporary file will be deleted
     * without being copied to the target location.
     */
    ~TempWriteFile();

    /**
     * Return the name of the temporary file.  Unless the constructor
     * threw an exception, this file will have been created already
     * (but it will not be open).
     *
     * (If moveToTarget has already been called, return an empty
     * string.)
     */
    QString getTemporaryFilename();

    /**
     * Rename the temporary file to the target filename.
     */
    void moveToTarget();

protected:
    QString m_target;
    QString m_temp;
};


#endif