text: #include "aboutwindow.h"
  #include "ui_aboutwindow.h"
  
  aboutWindow::aboutWindow(QWidget *parent) :
      QDialog(parent),
      ui(new Ui::aboutWindow)
  {
      ui->setupUi(this);
  
      connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(quit()));
  }
  
  void aboutWindow::quit()
  {
      close();
  }
  
  aboutWindow::~aboutWindow()
  {
      delete ui;
  }
  