LuatOS/module/Air8101/demo/lvgl/lvgl_demo_test/slider_demo.lua

local slider_demo = {}

local function event_handler(obj, event)
    if(event == lvgl.EVENT_VALUE_CHANGED) then
        print(string.format("Value: %d\n", lvgl.slider_get_value(obj)));
    end
end

function slider_demo.demo()
    --Create a slider
    local slider = lvgl.slider_create(lvgl.scr_act(), nil);
    lvgl.obj_align(slider, nil, lvgl.ALIGN_CENTER, 0, 0);
    lvgl.obj_set_event_cb(slider, event_handler);
end

return slider_demo