import 'package:flutter/material.dart';

final _formKey = GlobalKey<FormState>();

class FormWidget extends StatelessWidget {
  const FormWidget({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("FlutterForm Widget"),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Form(
          key: _formKey,
          child: Column(
            children: [
              TextFormField(
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Enter Something';
                  }
                  return null;
                },
              ),
              TextFormField(
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Enter Something';
                  }
                  return null;
                },
              ),
              ElevatedButton(
                onPressed: () {
                  if (_formKey.currentState!.validate()) {
                    // it trigger very form field validator
                    ScaffoldMessenger.of(context).showSnackBar(
                      const SnackBar(
                        content: Text('Great'),
                      ),
                    );
                  }
                },
                child: const Text('Validate'),
              )
            ],
          ),
        ),
      ),
    );
  }
}