Mercurial > hg > svcore
annotate base/TempWriteFile.h @ 1008:d9e0e59a1581
When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)
author | Chris Cannam |
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date | Fri, 14 Nov 2014 13:51:33 +0000 |
parents | 920e3880f7b4 |
children | 1c9bbbb6116a |
rev | line source |
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Chris@674 | 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ |
Chris@674 | 2 |
Chris@674 | 3 /* |
Chris@674 | 4 Sonic Visualiser |
Chris@674 | 5 An audio file viewer and annotation editor. |
Chris@674 | 6 Centre for Digital Music, Queen Mary, University of London. |
Chris@674 | 7 |
Chris@674 | 8 This program is free software; you can redistribute it and/or |
Chris@674 | 9 modify it under the terms of the GNU General Public License as |
Chris@674 | 10 published by the Free Software Foundation; either version 2 of the |
Chris@674 | 11 License, or (at your option) any later version. See the file |
Chris@674 | 12 COPYING included with this distribution for more information. |
Chris@674 | 13 */ |
Chris@674 | 14 |
Chris@674 | 15 #ifndef _TEMP_WRITE_FILE_H_ |
Chris@674 | 16 #define _TEMP_WRITE_FILE_H_ |
Chris@674 | 17 |
Chris@674 | 18 #include <QTemporaryFile> |
Chris@674 | 19 |
Chris@674 | 20 /** |
Chris@674 | 21 * A class that manages the creation of a temporary file with a given |
Chris@674 | 22 * prefix and the renaming of that file to the prefix after use. For |
Chris@674 | 23 * use when saving a file over an existing one, to avoid clobbering |
Chris@674 | 24 * the original before the save is complete. |
Chris@674 | 25 */ |
Chris@674 | 26 |
Chris@674 | 27 class TempWriteFile |
Chris@674 | 28 { |
Chris@674 | 29 public: |
Chris@674 | 30 TempWriteFile(QString targetFileName); // may throw FileOperationFailed |
Chris@674 | 31 |
Chris@674 | 32 /** |
Chris@674 | 33 * Destroy the temporary file object. If moveToTarget has not |
Chris@674 | 34 * been called, the associated temporary file will be deleted |
Chris@674 | 35 * without being copied to the target location. |
Chris@674 | 36 */ |
Chris@674 | 37 ~TempWriteFile(); |
Chris@674 | 38 |
Chris@674 | 39 /** |
Chris@674 | 40 * Return the name of the temporary file. Unless the constructor |
Chris@674 | 41 * threw an exception, this file will have been created already |
Chris@674 | 42 * (but it will not be open). |
Chris@674 | 43 * |
Chris@674 | 44 * (If moveToTarget has already been called, return an empty |
Chris@674 | 45 * string.) |
Chris@674 | 46 */ |
Chris@674 | 47 QString getTemporaryFilename(); |
Chris@674 | 48 |
Chris@674 | 49 /** |
Chris@674 | 50 * Rename the temporary file to the target filename. |
Chris@674 | 51 */ |
Chris@674 | 52 void moveToTarget(); |
Chris@674 | 53 |
Chris@674 | 54 protected: |
Chris@674 | 55 QString m_target; |
Chris@674 | 56 QString m_temp; |
Chris@674 | 57 }; |
Chris@674 | 58 |
Chris@674 | 59 |
Chris@674 | 60 #endif |