local roller = lvgl.Roller(nil, { options = { options = "January\nFebruary\nMarch\nApril\nMay\nJune\nJuly\nAugust\nSeptember\nOctober\nNovember\nDecember", mode = lvgl.ROLLER_MODE.INFINITE, }, visible_cnt = 4, align = lvgl.ALIGN.CENTER }) print("create roller:", roller) roller:onevent(lvgl.EVENT.VALUE_CHANGED, function (obj, code) print(obj:get_selected_str()) end)