#ifndef MAINWINDOW_H #define MAINWINDOW_H #include #include namespace Ui { class MainWindow; } class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = nullptr); void keyPressEvent(QKeyEvent*); ~MainWindow(); private: QTimer timer; QColor color; Ui::MainWindow *ui; private slots: void handleTick(); }; #endif // MAINWINDOW_H