QDirIterator does not show hidden files, and the documentation does not mention
any flags that could be used to enable showing of hidden files.

I'd expect QDirIterator to show all files by default, and if not
this should be clearly documented!

Testcase:

#include <QtCore>
#include <cstdio>
int main(int argc, char *argv[])
{
  if (argc != 2) {
    fprintf(stderr,"Usage: %s <directory>\n");
    exit(1);
  }
  QDirIterator it(QString(argv[1]), QDirIterator::Subdirectories);
  while (it.hasNext()) {
    it.next();
    qDebug() << it.fileInfo().fileName();
  }
  return 0;
}

Run it on a directory with a hidden file, and see that it is not printed