#ifndef MAINWINDOW_H #define MAINWINDOW_H #include QT_BEGIN_NAMESPACE namespace Ui { class MainWindow; } class QGraphicsScene; QT_END_NAMESPACE class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = nullptr); ~MainWindow(); protected: bool eventFilter(QObject *obj, QEvent *event) override; private: void createComponents(); Ui::MainWindow *ui; QGraphicsScene *m_scene; }; #endif // MAINWINDOW_H