#include <QApplication>

#include <QFileDialog>
#include <QTimer>

void Test() {
  QWidget* w = new QWidget();
  w->show();
  QFileDialog* dialog = new QFileDialog(w);
  dialog->open(nullptr, nullptr);

  QTimer::singleShot(1000, w, [=]() {
    dialog->close();
    dialog->deleteLater();
    w->close();
    w->deleteLater();
    });
}

int main(int argc, char* argv[]) {
  SetCurrentProcessExplicitAppUserModelID(L"yes");

  QApplication a(argc, argv);
  a.setQuitOnLastWindowClosed(false);
  QTimer* loop_timer = new QTimer();
  loop_timer->setInterval(2000);
  loop_timer->setSingleShot(false);
  loop_timer->start();
  QObject::connect(loop_timer, &QTimer::timeout, loop_timer, [=]() {
    Test();
    });

  return a.exec();
}