#ifndef FRAMELESSWINDOW_H #define FRAMELESSWINDOW_H #include QT_BEGIN_NAMESPACE class QVBoxLayout; QT_END_NAMESPACE class FramelessWindow : public QWidget { Q_OBJECT public: explicit FramelessWindow(QWidget *parent = nullptr); void setCentralWidget(QWidget * widget); signals: private: QVBoxLayout * m_centralLayout = nullptr; QWidget * m_centralWidget = nullptr; // just a pointer, doesn't take the ownership. }; #endif // FRAMELESSWINDOW_H