Base Widget (lv_obj)

The most fundamental of all Widgets is the Base Widget, on which all other widgets are based. From an Object-Oriented perspective, think of the Base Widget as the Widget class from which all other Widgets inherit.

By this mechanisms, all Widgets carry the features of the Base Widget. Therefore, the functions and functionalities of the Base Widget can be used with other widgets as well. For example lv_obj_set_width(slider, 100).

The Base Widget can be used directly as a simple widget. While it is a simple rectangle, it has a large number of features shared with all Widgets, detailed in Common Widget Features. In HTML terms, think of it as a <div>.