text: #ifndef MAINFORM_H
  #define MAINFORM_H
  
  #include <QWidget>
  #include <QPushButton>
  #include <QScreen>
  #include <QLabel>
  
  class MainForm : public QWidget
  {
      Q_OBJECT
  
  public:
      explicit MainForm(QWidget *parent = nullptr);
      ~MainForm();
      void setupUi();
      void setScreen();
      void setButton();
      void setLabel();
  
  private slots:
      void on_button_clicked();
  
  private:
      QPushButton *button;
      QLabel *ttl;
      QLabel *spec;
  
      int scrWidth;
      int scrHeight;
  };
  #endif // MAINFORM_H
  