text: #ifndef WIDGET_H
  #define WIDGET_H
  
  #include <QWidget>
  
  QT_BEGIN_NAMESPACE
  namespace Ui { class Widget; }
  QT_END_NAMESPACE
  
  class Widget : public QWidget
  {
    Q_OBJECT
  
   public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
  
   private:
    Ui::Widget *ui;
  };
  #endif // WIDGET_H
  