QFileSystemModel/Win: Fix file system operations failing due to watchers

File system operations like renaming/removing may fail on Windows when
file system watchers are present. Add functions to
QFileSystemModelPrivate to temporarily remove the watchers prior to such
operations and to restore them in case of failure. Use them for
rename/remove (within a feature check for QFileSystemWatcher
and Q_OS_WIN).

Task-number: QTBUG-65683
Change-Id: I90142901892fbf9b1e1206a3397a95ffd3c8f010
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/widgets/dialogs/qfileinfogatherer_p.h b/src/widgets/dialogs/qfileinfogatherer_p.h
index bb13d4eb01..cc82f42850 100644
--- a/src/widgets/dialogs/qfileinfogatherer_p.h
+++ b/src/widgets/dialogs/qfileinfogatherer_p.h
@@ -167,6 +167,13 @@ public:
     explicit QFileInfoGatherer(QObject *parent = 0);
     ~QFileInfoGatherer();
 
+#if QT_CONFIG(filesystemwatcher) && defined(Q_OS_WIN)
+    QStringList watchedFiles() const            { return watcher->files(); }
+    QStringList watchedDirectories() const      { return watcher->directories(); }
+    void watchPaths(const QStringList &paths)   { watcher->addPaths(paths); }
+    void unwatchPaths(const QStringList &paths) { watcher->removePaths(paths); }
+#endif // filesystemwatcher && Q_OS_WIN
+
     // only callable from this->thread():
     void clear();
     void removePath(const QString &path);