cool_stepper 1.0.0

CoolStepper is a widget that displays a step by step sequence of operations. it could be helpful for a form wizard or onboarding.

example/lib/main.dart

import 'package:cool_stepper/cool_stepper.dart';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Cool Stepper',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
        fontFamily: GoogleFonts.poppins().fontFamily,
      ),
      debugShowCheckedModeBanner: false,
      home: MyHomePage(title: 'Cool Stepper'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  final _formKey = GlobalKey<FormState>();
  String selectedRole = "Writer";
  TextEditingController _nameCtrl = TextEditingController();
  TextEditingController _emailCtrl = TextEditingController();

  @override
  Widget build(BuildContext context) {
    final List<CoolStep> steps = [
      CoolStep(
        title: "Basic Information",
        subtitle: "Please fill some of the basic information to get started",
        content: Form(
          key: _formKey,
          child: Column(
            children: [
              _buildTextField(
                labelText: "Name",
                validator: (value) {
                  if (value.isEmpty) {
                    return "Name is required";
                  }
                  return null;
                },
                controller: _nameCtrl,
              ),
              _buildTextField(
                labelText: "Email Address",
                validator: (value) {
                  if (value.isEmpty) {
                    return "Email address is required";
                  }
                  return null;
                },
                controller: _emailCtrl,
              ),
            ],
          ),
        ),
        validation: () {
          if (!_formKey.currentState.validate()) {
            return "Fill form correctly";
          }
          return null;
        },
      ),
      CoolStep(
        title: "Select your role",
        subtitle: "Choose a role that better defines you",
        content: Container(
          child: Row(
            children: <Widget>[
              _buildSelector(
                context: context,
                name: "Writer",
              ),
              SizedBox(width: 5.0),
              _buildSelector(
                context: context,
                name: "Editor",
              ),
            ],
          ),
        ),
        validation: () {
          return null;
        },
      ),
    ];

    final stepper = CoolStepper(
      onCompleted: () {},
      steps: steps,
    );

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Container(
        child: stepper,
      ),
    );
  }

  Widget _buildTextField({
    String labelText,
    FormFieldValidator<String> validator,
    TextEditingController controller,
  }) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 20.0),
      child: TextFormField(
        decoration: InputDecoration(
          labelText: labelText,
        ),
        validator: validator,
        controller: controller,
      ),
    );
  }

  Widget _buildSelector({
    BuildContext context,
    String name,
  }) {
    bool isActive = name == selectedRole;

    return Expanded(
      child: AnimatedContainer(
        duration: Duration(milliseconds: 200),
        curve: Curves.easeInOut,
        decoration: BoxDecoration(
          color: isActive ? Theme.of(context).primaryColor : null,
          border: Border.all(
            width: 0,
          ),
          borderRadius: BorderRadius.circular(8.0),
        ),
        child: RadioListTile(
          value: name,
          activeColor: Colors.white,
          groupValue: selectedRole,
          onChanged: (String v) {
            setState(() {
              selectedRole = v;
            });
          },
          title: Text(
            name,
            style: TextStyle(
              color: isActive ? Colors.white : null,
            ),
          ),
        ),
      ),
    );
  }
}