Lv_label_set_long_mode() doesn't work

When using the list component, if the text is too long, set LV_ LABEL_ LONG_ SCROLL_ CIRCULAR has no effect.(lvgl 8.2.0)

Please send a code snippet to reproduce the issue.

I’m late. The code is as follows:

obj_btn = lv_list_add_btn(obj_list, ResourcePool::GetImage("wifi_on"), (char *)ssid_buf);

Does not scroll when ssid_buf is too long.

lv_obj_t * lv_list_add_btn(lv_obj_t * list, const void * icon, const char * txt)



    lv_obj_t * obj = lv_obj_class_create_obj(&lv_list_btn_class, list);


    lv_obj_set_size(obj, LV_PCT(100), 100);

    //lv_obj_set_flex_flow(obj, LV_FLEX_FLOW_ROW);

    if(icon) {

        lv_obj_t * img = lv_img_create(obj);

        lv_img_set_src(img, icon);



    if(txt) {

        lv_obj_t * label = lv_label_create(obj);

        lv_label_set_text(label, txt);

        lv_label_set_long_mode(label, LV_LABEL_LONG_SCROLL_CIRCULAR);

        lv_obj_set_style_text_color(label, lv_color_hex(0xFFFFFF), 0);


        //lv_obj_set_flex_grow(label, 1);


    return obj;


Do you use a custom style?

With the default theme with this code it works for me:

 btn = lv_list_add_btn(list1, LV_SYMBOL_FILE, "Something long to demonstrate scroll");

Yes, thank you for your reply! I customized lv_ list_ add_ Btn ().

and then I try to switch back to the default to scroll.

It should be that I have not set the width of the label component.