text: #include <QVBoxLayout>
  
  #include "mainwindow.h"
  #include "ui_mainwindow.h"
  
  MainWindow::MainWindow(QWidget *parent) :
      QMainWindow(parent),
      ui(new Ui::MainWindow)
  {
      ui->setupUi(this);
      this->setFixedSize(200, 300);
      layout = new QVBoxLayout;
      ui->centralWidget->setLayout(layout);
      layout->addWidget(elevator.GetWidget());
  }
  
  MainWindow::~MainWindow()
  {
     delete layout;
     delete ui;
  }
  