import 'package:flutter/material.dart'; /// User interface utilities /// Build and return a full loading page Widget buildLoadingPage() { return Scaffold( body: Center( child: CircularProgressIndicator(), ), ); } /// Build and return an error card Widget buildErrorCard(String message) { return Card( elevation: 2.0, color: Colors.red, child: Padding( padding: const EdgeInsets.all(8.0), child: Row( children: [ Padding( padding: const EdgeInsets.only(right: 8.0), child: Icon( Icons.error, color: Colors.white, ), ), Flexible( child: Text( message, style: TextStyle(color: Colors.white), maxLines: null, ), ) ], ), ), ); }