Widgets: Add window state handler

Sine Striker

2023-12-11 677e7a737897e8c2a60564085821545810369e02

 examples/shared/widgetframe/windowbar.h

@@ -62,7 +62,7 @@
    protected:
        WindowBar(WindowBarPrivate &d, QWidget *parent = nullptr);

        QScopedPointer<WindowBarPrivate> d_ptr;
        const std::unique_ptr<WindowBarPrivate> d_ptr;
    };

}