
          if (n === 0) {
            this.el.selected.style.display = 'none';
            return;
          } else {
            this.el.selected.style.display = 'block';
          }

          if (current < 0) current = n - 1;
          if (current >= n) current = 0;
          this.selectedCurrent = current;

          let item = this.selectedItems[current];

          let phIndex = this.ohIndexToPhIndex[item.source];
          let meta = this.scatterMeta[phIndex];
          let phName = this.ohIndexToPhN