#include <QString>
#include <QFileDialog>

#include <QApplication>

int main(int argc, char *argv[])
{ // initial directory
  static const QString dir{ QStringLiteral("C:/") };

  QApplication app(argc,argv);

  // non-native file dialog at root of system drive
  QFileDialog filedialog(nullptr,"test",dir);
  filedialog.setOption(QFileDialog::DontUseNativeDialog);
  filedialog.setViewMode(QFileDialog::Detail);

  // note that the "Users" directory does not have an icon (unlike the other ones).
  // also within the "Users" directory, the directory for the current user also
  // does not have an icon.
  // besides these directories, there are more directories missing their icon
  // (also on other drives). it seems to only affect directories, not drives/files.
  filedialog.show();

  return QApplication::exec();
}