warnLogOff method
Implementation
Future<bool> warnLogOff(BuildContext context) async {
var rval = await showDialog<bool>(
context: context,
builder: (c) => AlertDialog(
title: Text('Attenzione', textAlign: TextAlign.center, style: TextStyle(color: Colors.yellow)),
content: Text('Sei sicuro di volerti disconnettere?'),
actions: [
TextButton(style: TextButton.styleFrom(foregroundColor: Colors.green), onPressed: () => Navigator.pop(c, true), child: Text('Si')),
TextButton(style: TextButton.styleFrom(foregroundColor: Colors.red), onPressed: () => Navigator.pop(c, false), child: Text('No')),
],
));
return rval ?? false;
}