lvgl/examples/event/about.md

title, description, order

title	description	order
Events	Widget events and user input handling.	50

Widgets emit events such as LV_EVENT_CLICKED, LV_EVENT_VALUE_CHANGED, LV_EVENT_DRAW_MAIN, and LV_EVENT_KEY. You register a callback with lv_obj_add_event_cb() and receive an lv_event_t pointer from which you read the code, target, and user data. The examples cover basic wiring, bubbling, custom event codes, and reading input device state inside a handler.