build method

  1. @override
Widget build(
  1. BuildContext context,
  2. Function onValueChanged
)
override

Builds the widget representing the field.

context The build context.

onValueChanged A function to be called when the value of the field changes.

Implementation

@override
Widget build(BuildContext context, Function onValueChanged) {
  return Padding(
    padding: padding,
    child: DropdownButtonFormField<String>(
      icon: icon,
      style: textStyle,
      value: selectedValue,
      decoration: dropdownDecoration,
      items: items.map((String value) {
        return DropdownMenuItem<String>(
          value: value,
          child: Text(value),
        );
      }).toList(),
      onChanged: (newValue) {
        selectedValue = newValue;
        onChanged(newValue);
        onValueChanged();
      },
      validator: (value) {
        if (validators.isNotEmpty) {
          for (var validator in validators) {
            var output = validator(value);
            if (output != null) {
              return output;
            }
          }
        }
        return null;
      },
    ),
  );
}