fbmobile/lib/ui/widgets/login_header.dart

import 'package:flutter/material.dart';
import 'package:flutter_translate/flutter_translate.dart';

class LoginHeaders extends StatelessWidget {
  final TextEditingController uriController;
  final TextEditingController usernameController;
  final TextEditingController passwordController;

  final String validationMessage;

  LoginHeaders(
      {@required this.uriController,
      @required this.usernameController,
      @required this.passwordController,
      this.validationMessage});

  @override
  Widget build(BuildContext context) {
    return Column(children: <Widget>[
      this.validationMessage != null ? Text(validationMessage, style: TextStyle(color: Colors.red)) : Container(),
      LoginTextField(uriController, translate('login.url_placeholder'), Icon(Icons.link),
          keyboardType: TextInputType.url),
      LoginTextField(usernameController, translate('login.username_placeholder'), Icon(Icons.person),
          keyboardType: TextInputType.name),
      LoginTextField(passwordController, translate('login.password_placeholder'), Icon(Icons.vpn_key),
          obscureText: true),
    ]);
  }
}

class LoginTextField extends StatelessWidget {
  final TextEditingController controller;
  final String placeHolder;
  final TextInputType keyboardType;
  final bool obscureText;
  final Widget prefixIcon;

  LoginTextField(this.controller, this.placeHolder, this.prefixIcon,
      {this.keyboardType = TextInputType.text, this.obscureText = false});

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.symmetric(horizontal: 10.0),
      margin: EdgeInsets.symmetric(horizontal: 10.0, vertical: 10.0),
      height: 50.0,
      alignment: Alignment.centerLeft,
      decoration: BoxDecoration(color: Colors.white, borderRadius: BorderRadius.circular(10.0)),
      child: TextFormField(
          keyboardType: keyboardType,
          obscureText: obscureText,
          decoration: InputDecoration(
            suffixIcon: IconButton(
              onPressed: () => controller.clear(),
              icon: Icon(Icons.clear),
            ),
            prefixIcon: prefixIcon,
            hintText: placeHolder,
            contentPadding: EdgeInsets.fromLTRB(20.0, 10.0, 20.0, 10.0),
            border: OutlineInputBorder(borderRadius: BorderRadius.circular(32.0)),
          ),
          controller: controller),
    );
  }
}