LibAC-flutter/lib/TextFields.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';

enum InputType {
  Text,
  Number,
  Date;

  TextInputType getType() {
    switch (this) {
      case Text:
        return TextInputType.text;
      case Number:
        return TextInputType.number;
      case Date:
        return TextInputType.datetime;
    }
  }

  List<TextInputFormatter> getFormatters() {
    var lst = [];

    switch (this) {
      case Text:
        return [FilteringTextInputFormatter.deny("")];
      case Number:
        return [FilteringTextInputFormatter.digitsOnly];
      case Date:
        return [
          FilteringTextInputFormatter.digitsOnly,
          FilteringTextInputFormatter.allow("-"),
          FilteringTextInputFormatter.allow("/")
        ];
    }
  }
}

class HighlightTextfield extends StatelessWidget {
  TextEditingController controller;
  InputType inputStyle;
  Color selected;
  Color inactive;
  HighlightTextfield(
      {required this.controller,
      required this.inputStyle,
      required this.selected,
      required this.inactive});

  @override
  Widget build(BuildContext context) {
    return TextField(
      controller: controller,
      keyboardType: inputStyle.getType(),
      inputFormatters: inputStyle.getFormatters(),
      decoration: InputDecoration(
        focusedBorder: OutlineInputBorder(
          borderSide: BorderSide(
            color: selected,
          ),
        ),
        border: OutlineInputBorder(
          borderSide: BorderSide(
            color: inactive,
          ),
        ),
      ),
    );
  }

  void updateColors(Color active, Color inactive) {
    selected = active;
    this.inactive = inactive;
  }
}