void MainWindow::resizeEvent(QResizeEvent* event)
{
  QMainWindow::resizeEvent(event);
  qDebug("resize");

  QSize size = event->size();

  ui->frame->setGeometry(size.width() * 0.3,size.height() * 0.4,size.width() * 0.3,size.height() * 0.4);


   // Your code here.
}