adguard-home-manager/lib/widgets/load_status_widgets.dart

import 'package:flutter/material.dart';

class LoadingData extends StatelessWidget {
  final String text;

  const LoadingData({
    super.key,
    required this.text,
  });

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(24),
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            const CircularProgressIndicator(),
            const SizedBox(height: 30),
            Padding(
              padding: const EdgeInsets.symmetric(horizontal: 20),
              child: Text(
                text,
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: 22,
                  color: Theme.of(context).colorScheme.onSurfaceVariant
                ),
              ),
            )
          ],
        ),
      ),
    );
  }
}

class ErrorLoadData extends StatelessWidget {
  final String text;

  const ErrorLoadData({
    super.key,
    required this.text
  });

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          const Icon(
            Icons.error,
            color: Colors.red,
            size: 50,
          ),
          const SizedBox(height: 30),
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 20),
            child: Text(
              text,
              textAlign: TextAlign.center,
              style: TextStyle(
                fontSize: 22,
                color: Theme.of(context).colorScheme.onSurfaceVariant
              ),
            ),
          )
        ],
      ),
    );
  }
}