Windows: QFileSystemWatcher does not signal directoryChanged() when files are modified in a watched directory

It does emit the signal when files are added to or removed from the directory. It does not fire the signal when existing files are modified. According to the documentation: http://doc.trolltech.com/4.6/qfilesystemwatcher.html#directoryChanged it should:

This signal is emitted when the directory at a specified path, is modified (e.g., when a file is added, modified or deleted) or removed from disk.

This can be fixed by modifying qfilesystemwatcher_win.cpp:QWindowsFileSystemWatcherEngine::addPaths so that the flag

FILE_NOTIFY_CHANGE_LAST_WRITE

is added to the flags for directories as well as files so that the code becomes:

       uint flags = isDir
                           ? (FILE_NOTIFY_CHANGE_DIR_NAME
                              | FILE_NOTIFY_CHANGE_FILE_NAME
                              | FILE_NOTIFY_CHANGE_LAST_WRITE)
                           : (FILE_NOTIFY_CHANGE_DIR_NAME
                              | FILE_NOTIFY_CHANGE_FILE_NAME
                              | FILE_NOTIFY_CHANGE_ATTRIBUTES
                              | FILE_NOTIFY_CHANGE_SIZE
                              | FILE_NOTIFY_CHANGE_LAST_WRITE
                              | FILE_NOTIFY_CHANGE_SECURITY);

I don't work on the other platforms I can't compare this behaviour to what they do.