C++ utility class allowing subscribing to changes of particular members (properties) of a class (=Observer pattern simplified). Works well with UI properties that can only be updated on the GUI thread. C++ equivalent of Android's LiveData.

A sleek audio player built with Qt 6, supporting MP3 playback with play/pause, track navigation, shuffle, and loop modes. Displays metadata (title, artist, album art) and features an interactive seek bar. Uses QML for a modern UI and C++ for backend logic, showcasing Qt's multimedia capabilities in a clean, responsive design.