text: #ifndef MAINFORM_H
  #define MAINFORM_H
  
  #include <QWidget>
  #include <QPushButton>
  #include <QToolTip>
  #include <QGridLayout>
  #include <QScreen>
  #include <QGuiApplication>
  #include <QFont>
  
  class MainForm : public QWidget
  {
      Q_OBJECT
  
  public:
      MainForm(QWidget *parent = nullptr);
      ~MainForm();
      void setupUi();
  
  private slots:
      void onCloseButton();
  
  private:
      QPushButton *button1;
      QPushButton *button2;
      QPushButton *button3;
      QPushButton *button4;
      QPushButton *closeButton;
      int scrWidth;
      int scrHeight;
  };
  #endif // MAINFORM_H
  