/ Login Screen

Provides login screen with login/signup functionalities

Provides login screen with login/signup functionalities

Flutter Login

FlutterLogin is a ready-made login/signup widget with many animation effects to demonstrate the capabilities of Flutter.

Flutter-Login

Installation

Follow the install instructions here

Reference

Property Type Desciption
onSignup AuthCallback Called when the user hit the submit button when in sign up mode
onLogin AuthCallback Called when the user hit the submit button when in login mode
onRecoverPassword RecoverCallback Called when the user hit the submit button when in recover password mode
title String The large text above the login [Card], usually the app or company name
logo String The path to the asset image that will be passed to the Image.asset()
messages LoginMessages Describes all of the labels, text hints, button texts and other auth descriptions
theme LoginTheme FlutterLogin's theme. If not specified, it will use the default theme as shown in the demo gifs and use the colorsheme in the closest Theme widget
emailValidator FormFieldValidator<String> Email validating logic, Returns an error string to display if the input is invalid, or null otherwise
passwordValidator FormFieldValidator<String> Same as emailValidator but for password
onSubmitAnimationCompleted Function Called after the submit animation's completed. Put your route transition logic here
logoTag String Hero tag for logo image. If not specified, it will simply fade out when changing route
titleTag String Hero tag for title text. Need to specify LoginTheme.beforeHeroFontSize and LoginTheme.afterHeroFontSize if you want different font size before and after hero animation
showDebugButtons bool Display the debug buttons to quickly forward/reverse login animations. In release mode, this will be overrided to false regardless of the value passed in

NOTE: It is recommended that the child widget of the Hero widget should be the
same in both places. For title's hero animation use the
LoginThemeHelper.loginTextStyle in the next screen to get the style of the
exact text widget in the login screen. LoginThemeHelper can be accessed by adding
this line

import 'package:flutter_login/theme.dart';

LoginMessages

Property Type Desciption
usernameHint String Hint text of the user name [TextField]
passwordHint String Hint text of the password [TextField]
confirmPasswordHint String Hint text of the confirm password [TextField]
forgotPasswordButton String Forgot password button's label
loginButton String Login button's label
signupButton String Signup button's label
recoverPasswordButton String Recover password button's label
recoverPasswordDescription String Description in password recovery form
goBackButton String Go back button's label. Go back button is used to go back to to login/signup form from the recover password form
confirmPasswordError String The error message to show when the confirm password not match with the original password
recoverPasswordSuccess String The success message to show after submitting recover password

LoginTheme

Property Type Desciption
primaryColor Color The background color of major parts of the widget like the login screen and buttons
accentColor Color The secondary color, used for title text color, loading icon, etc. Should be contrast with the [primaryColor]
errorColor Color The color to use for [TextField] input validation errors
cardTheme CardTheme The colors and styles used to render auth [Card]
inputTheme InputDecorationTheme Defines the appearance of all [TextField]s
buttonTheme LoginButtonTheme A theme for customizing the shape, elevation, and color of the submit button
titleStyle TextStyle Text style for the big title
bodyStyle TextStyle Text style for small text like the recover password description
textFieldStyle TextStyle Text style for [TextField] input text
buttonStyle TextStyle Text style for button text
beforeHeroFontSize double Defines the font size of the title in the login screen (before the hero transition)
afterHeroFontSize double Defines the font size of the title in the screen after the login screen (after the hero transition)

Examples

You can view the complete example in the [example project] which resulted in the
gif above

Basic example

import 'package:flutter/material.dart';
import 'package:flutter_login/flutter_login.dart';
import 'dashboard_screen.dart';

const users = const {
  '[email protected]': '12345',
  '[email protected]': 'hunter',
};

class LoginScreen extends StatelessWidget {
  Duration get loginTime => Duration(milliseconds: 2250);

  Future<String> _authUser(LoginData data) {
    print('Name: ${data.name}, Password: ${data.password}');
    return Future.delayed(loginTime).then((_) {
      if (!users.containsKey(data.name)) {
        return 'Username not exists';
      }
      if (users[data.name] != data.password) {
        return 'Password does not match';
      }
      return null;
    });
  }

  Future<String> _recoverPassword(String name) {
    print('Name: $name');
    return Future.delayed(loginTime).then((_) {
      if (!users.containsKey(name)) {
        return 'Username not exists';
      }
      return null;
    });
  }

  @override
  Widget build(BuildContext context) {
    return FlutterLogin(
      title: 'ECORP',
      logo: 'assets/images/ecorp-lightblue.png',
      onLogin: _authUser,
      onSignup: _authUser,
      onSubmitAnimationCompleted: () {
        Navigator.of(context).pushReplacement(MaterialPageRoute(
          builder: (context) => DashboardScreen(),
        ));
      },
      onRecoverPassword: _recoverPassword,
    );
  }
}

basic

Theming via ThemeData

Login theme can be customized indectly by using ThemeData like this

// main.dart
import 'package:flutter/material.dart';
import 'login_screen.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Login Demo',
      theme: ThemeData(
        primarySwatch: Colors.deepPurple,
        accentColor: Colors.orange,
        cursorColor: Colors.orange,
        textTheme: TextTheme(
          display2: TextStyle(
            fontFamily: 'OpenSans',
            fontSize: 45.0,
            color: Colors.orange,
          ),
          button: TextStyle(
            fontFamily: 'OpenSans',
          ),
          subhead: TextStyle(fontFamily: 'NotoSans'),
          body1: TextStyle(fontFamily: 'NotoSans'),
        ),
      ),
      home: LoginScreen(),
    );
  }
}

// login_screen.dart
import 'package:flutter/material.dart';
import 'package:flutter_login/flutter_login.dart';
import 'dashboard_screen.dart';

class LoginScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FlutterLogin(
      title: 'ECORP',
      logo: 'assets/images/ecorp.png',
      onLogin: (_) => Future(null),
      onSignup: (_) => Future(null),
      onSubmitAnimationCompleted: () {
        Navigator.of(context).pushReplacement(MaterialPageRoute(
          builder: (context) => DashboardScreen(),
        ));
      },
      onRecoverPassword: (_) => Future(null),
    );
  }
}

theme-data

Custom labels

import 'package:flutter/material.dart';
import 'package:flutter_login/flutter_login.dart';
import 'dashboard_screen.dart';

class LoginScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FlutterLogin(
      title: 'ECORP',
      logo: 'assets/images/ecorp.png',
      onLogin: (_) => Future(null),
      onSignup: (_) => Future(null),
      onSubmitAnimationCompleted: () {
        Navigator.of(context).pushReplacement(MaterialPageRoute(
          builder: (context) => DashboardScreen(),
        ));
      },
      onRecoverPassword: (_) => Future(null),
      messages: LoginMessages(
        usernameHint: 'Username',
        passwordHint: 'Pass',
        confirmPasswordHint: 'Confirm',
        loginButton: 'LOG IN',
        signupButton: 'REGISTER',
        forgotPasswordButton: 'Forgot huh?',
        recoverPasswordButton: 'HELP ME',
        goBackButton: 'GO BACK',
        confirmPasswordError: 'Not match!',
        recoverPasswordDescription:
            'Lorem Ipsum is simply dummy text of the printing and typesetting industry',
        recoverPasswordSuccess: 'Password rescued successfully',
      ),
    );
  }
}
Login/Signup Password Recovery
custom-label-login custom-label-recover

Theme customization


import 'package:flutter/material.dart';
import 'package:flutter_login/flutter_login.dart';
import 'dashboard_screen.dart';

class LoginScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final inputBorder = BorderRadius.vertical(
      bottom: Radius.circular(10.0),
      top: Radius.circular(20.0),
    );

    return FlutterLogin(
      title: 'ECORP',
      logo: 'assets/images/ecorp-lightgreen.png',
      onLogin: (_) => Future(null),
      onSignup: (_) => Future(null),
      onSubmitAnimationCompleted: () {
        Navigator.of(context).pushReplacement(MaterialPageRoute(
          builder: (context) => DashboardScreen(),
        ));
      },
      onRecoverPassword: (_) => Future(null),
      theme: LoginTheme(
        primaryColor: Colors.teal,
        accentColor: Colors.yellow,
        errorColor: Colors.deepOrange,
        titleStyle: TextStyle(
          color: Colors.greenAccent,
          fontFamily: 'Quicksand',
          letterSpacing: 4,
        ),
        bodyStyle: TextStyle(
          fontStyle: FontStyle.italic,
          decoration: TextDecoration.underline,
        ),
        textFieldStyle: TextStyle(
          color: Colors.orange,
          shadows: [Shadow(color: Colors.yellow, blurRadius: 2)],
        ),
        buttonStyle: TextStyle(
          fontWeight: FontWeight.w800,
          color: Colors.yellow,
        ),
        cardTheme: CardTheme(
          color: Colors.yellow.shade100,
          elevation: 5,
          margin: EdgeInsets.only(top: 15),
          shape: ContinuousRectangleBorder(
              borderRadius: BorderRadius.circular(100.0)),
        ),
        inputTheme: InputDecorationTheme(
          filled: true,
          fillColor: Colors.purple.withOpacity(.1),
          contentPadding: EdgeInsets.zero,
          errorStyle: TextStyle(
            backgroundColor: Colors.orange,
            color: Colors.white,
          ),
          labelStyle: TextStyle(fontSize: 12),
          enabledBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: Colors.blue.shade700, width: 4),
            borderRadius: inputBorder,
          ),
          focusedBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: Colors.blue.shade400, width: 5),
            borderRadius: inputBorder,
          ),
          errorBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: Colors.red.shade700, width: 7),
            borderRadius: inputBorder,
          ),
          focusedErrorBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: Colors.red.shade400, width: 8),
            borderRadius: inputBorder,
          ),
          disabledBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: Colors.grey, width: 5),
            borderRadius: inputBorder,
          ),
        ),
        buttonTheme: LoginButtonTheme(
          splashColor: Colors.purple,
          backgroundColor: Colors.pinkAccent,
          highlightColor: Colors.lightGreen,
          elevation: 9.0,
          highlightElevation: 6.0,
          shape: BeveledRectangleBorder(
            borderRadius: BorderRadius.circular(10),
          ),
          // shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(5)),
          // shape: CircleBorder(side: BorderSide(color: Colors.green)),
          // shape: ContinuousRectangleBorder(borderRadius: BorderRadius.circular(55.0)),
        ),
      ),
    );
  }
}

theme

GitHub

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