A Flutter TextField that maintain selection state like TextInput in React Native

TextInput.dart

import 'package:flutter/material.dart';

/// A TextField that maintain selection state like React Native
class TextInput extends StatefulWidget {

  TextInput({@required this.decoration, @required this.text, @required this.onChanged});

  final String text;
  final InputDecoration decoration;
  final Function onChanged;

  @override
  _TextInputState createState() => _TextInputState();
}

class _TextInputState extends State<TextInput> {
  final _ctrl = TextEditingController();

  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    _ctrl.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    _ctrl.value = _ctrl.value.copyWith(
      text: widget.text,
    ); 

    return TextField(
      controller: _ctrl,
      decoration: widget.decoration,
      onChanged: widget.onChanged,
    );
  }
}