#ifndef MAINWINDOW_H #define MAINWINDOW_H #include namespace Ui { class MainWindow; } class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = root); ~MainWindow(); protected: void paintEvent(QPaintEvent* event) Q_DECL_OVERRIDE; private: constexpr static QWidget* root = 0; Ui::MainWindow *ui; }; #endif // MAINWINDOW_H