149  * @param sel_opt id of the selected option (0 ... number of option - 1);
162     /*In infinite mode interpret the new ID relative to the currently visible "page"*/  in lv_roller_set_selected()
206  * Get the id of the selected option
208  * @return id of the selected option (0 ... number of option - 1);
594  * Refresh the position of the roller. It uses the id stored in: roller->ddlist.selected_option_id
630     int32_t id = roller->sel_opt_id;  in refr_position()  local
631     lv_coord_t sel_y1 = id * (font_h + line_space);  in refr_position()
708             int32_t id = (mid - label_y1) / label_unit;  in release_handler()  local
710             if(id < 0) id = 0;  in release_handler()
711             if(id >= roller->option_cnt) id = roller->option_cnt - 1;  in release_handler()
713             new_opt = id;  in release_handler()
721     uint32_t id  = roller->sel_opt_id; /*Just to use uint32_t in event data*/  in release_handler()  local
722     lv_res_t res = lv_event_send(obj, LV_EVENT_VALUE_CHANGED, &id);  in release_handler()
742         /*Move to the new id*/  in inf_normalize()