```dart
class CustomTextField extends StatefulWidget {
  final String hint;
  final TextEditingController controller;
  final Color baseColor;
  final Color borderColor;
  final Color errorColor;
  final TextInputType inputType;
  final bool obscureText;
  final Function validator;
  final Function onChanged;

  CustomTextField(
      {this.hint,
      this.controller,
      this.onChanged,
      this.baseColor,
      this.borderColor,
      this.errorColor,
      this.inputType = TextInputType.text,
      this.obscureText = false,
      this.validator});

  _CustomTextFieldState createState() => _CustomTextFieldState();
}

class _CustomTextFieldState extends State<CustomTextField> {
  Color currentColor;

  @override
  void initState() {
    super.initState();
    currentColor = widget.borderColor;
  }

  @override
  Widget build(BuildContext context) {
    return Card(
      elevation: 0.0,
      color: Colors.white,
      shape: RoundedRectangleBorder(
        side: BorderSide(color: currentColor, width: 2.0),
        borderRadius: BorderRadius.circular(20.0),
      ),
      child: Padding(
        padding: EdgeInsets.symmetric(horizontal: 10.0),
        child: TextField(
          obscureText: widget.obscureText,
          onChanged: (text) {
            if (widget.onChanged != null) {
              widget.onChanged(text);
            }
            setState(() {
              if (!widget.validator(text) || text.length == 0) {
                currentColor = widget.errorColor;
              } else {
                currentColor = widget.baseColor;
              }
            });
          }, 
          //keyboardType: widget.inputType,
          controller: widget.controller,
          decoration: InputDecoration(
            hintStyle: TextStyle(
              color: widget.baseColor,
              fontFamily: "OpenSans",
              fontWeight: FontWeight.w300,
            ),
            border: InputBorder.none,
            hintText: widget.hint,
          ),
        ),
      ),
    );
  }
}
```

```dart
 _emailField = new CustomTextField(
      baseColor: Colors.grey,
      borderColor: Colors.grey[400],
      errorColor: Colors.red,
      controller: _email,
      hint: "E-mail Adress",
      inputType: TextInputType.emailAddress,
      validator: Validator.validateEmail,
    );
    _passwordField = CustomTextField(
      baseColor: Colors.grey,
      borderColor: Colors.grey[400],
      errorColor: Colors.red,
      controller: _password,
      obscureText: true,
      hint: "Password",
      validator: Validator.validatePassword,
);
```


---

```Dart
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

class TextFieldCus extends StatelessWidget {
  final String hintText,text;
  final bool obscureText, enabled;
  final Function onChanged;
  final TextInputType textInputType;
  final int maxLength;
  final int maxlines;
  final TextInputAction textInputAction;
  final Color textColor;
  final String error;
  final Function onEditComplete;
  final List<TextInputFormatter> textInputFormatter;


  TextFieldCus({this.textInputFormatter,this.maxLength,this.onEditComplete,this.error,this.textColor,this.textInputAction,this.maxlines,this.text,@required this.hintText, this.obscureText, this.onChanged, this.enabled,this.textInputType});

  @override
  Widget build(BuildContext context) {
    TextEditingController _controller=text!=null?TextEditingController(text: text):null;
    if(_controller!=null) {
      _controller.selection = TextSelection.fromPosition(
          TextPosition(offset: _controller.text.length));
    }
    OutlineInputBorder outlineInputBorder =  const OutlineInputBorder(
      borderSide: const BorderSide(color: Colors.white, width: 0.0),
    );
    return Padding(
      padding: const EdgeInsets.fromLTRB(0, 6, 0, 6),
      child: TextField(
        onSubmitted:onEditComplete,
        maxLines: maxlines,
        style: TextStyle(color: textColor),
        keyboardType: textInputType,
        obscureText: obscureText == null ? false : obscureText,
        maxLength:maxLength!=null?maxLength:null ,
        onChanged: onChanged,
        enabled: enabled != null ? enabled : true,
        inputFormatters: textInputFormatter,
        controller: _controller!=null?_controller:null,
        textInputAction: textInputAction!=null?textInputAction:TextInputAction.done,
        decoration: InputDecoration(
            counterText: '',
          errorText: error,
          labelStyle: TextStyle(color: Colors.grey),
          enabledBorder: outlineInputBorder,
            labelText: hintText,
            hintStyle: TextStyle(color: Colors.white),
            border: outlineInputBorder
        ),
      ),
    );
  }
}
```