class MyWidget extends QWidget
    {
 
        private $quit;
        private $slider;
        private $layout;
        private $lcd;
 
        function __construct()
        {
            parent::__construct();
 
            $this->quit = new QPushButton(tr("Quit"));
            $this->quit->setFont(new QFont("Times", 18, QFont::Bold));
 
            $this->lcd = new QLCDNumber(2);
            $this->lcd->setSegmentStyle(QLCDNumber::Filled);
 
            $this->slider = new QSlider(Qt::Horizontal);
            $this->slider->setRange(0, 99);
            $this->slider->setValue(0);
 
            $this->connect($this->quit, SIGNAL('clicked()'), 
                        QApplication::instance(), SLOT('quit()'));
            $this->connect($this->slider, SIGNAL('valueChanged(int)'),
                        $this->lcd, SLOT('display(int)'));
 
            $this->layout = new QVBoxLayout();
            $this->layout->addWidget($this->quit);
            $this->layout->addWidget($this->lcd);
            $this->layout->addWidget($this->slider);
            $this->setLayout($this->layout);
        }
    }