build method

@override Widget build(BuildContext context)

Implementation

@override
Widget build(BuildContext context) {
  var ls = items.mapList((e) => DropdownMenuItem<T>(value: e.value, child: Text(e.label)));
  return DropdownButtonFormField<T>(
    initialValue: value,
    isExpanded: true,
    items: ls,
    onChanged: (e) {
      value = e;
      updateState();
      onChanged?.call(value);
    },
  );
}