1import 'package:flutter/material.dart';
2
3Future<bool?> showDeleteDialog(BuildContext context) {
4  return showDialog<bool>(
5    context: context,
6    barrierDismissible: false,
7    builder: (dialogContext) {
8      return AlertDialog(
9        title: const Text('Delete project'),
10        content: const Text('This action cannot be undone.'),
11        actions: [
12          TextButton(
13            onPressed: () => Navigator.of(dialogContext).pop(false),
14            child: const Text('Cancel'),
15          ),
16          ElevatedButton(
17            onPressed: () => Navigator.of(dialogContext).pop(true),
18            child: const Text('Delete'),
19          ),
20        ],
21      );
22    },
23  );
24}

1Future<void> showMandatoryDialog(BuildContext context) {
2  return showDialog<void>(
3    context: context,
4    barrierDismissible: false,
5    builder: (dialogContext) {
6      return PopScope(
7        canPop: false,
8        child: AlertDialog(
9          title: const Text('Finish setup'),
10          content: const Text('Complete this step before leaving.'),
11          actions: [
12            ElevatedButton(
13              onPressed: () => Navigator.of(dialogContext).pop(),
14              child: const Text('Done'),
15            ),
16          ],
17        ),
18      );
19    },
20  );
21}

1import 'package:flutter/material.dart';
2
3class ConfirmDialog extends StatefulWidget {
4  const ConfirmDialog({super.key});
5
6  @override
7  State<ConfirmDialog> createState() => _ConfirmDialogState();
8}
9
10class _ConfirmDialogState extends State<ConfirmDialog> {
11  bool _loading = false;
12
13  Future<void> _confirm() async {
14    if (_loading) return;
15    setState(() => _loading = true);
16
17    try {
18      await Future<void>.delayed(const Duration(seconds: 2));
19      if (!mounted) return;
20      Navigator.of(context).pop(true);
21    } catch (_) {
22      if (!mounted) return;
23      setState(() => _loading = false);
24    }
25  }
26
27  @override
28  Widget build(BuildContext context) {
29    return AlertDialog(
30      title: const Text('Confirm payment'),
31      content: const Text('Proceed now?'),
32      actions: [
33        TextButton(
34          onPressed: _loading ? null : () => Navigator.of(context).pop(false),
35          child: const Text('Cancel'),
36        ),
37        ElevatedButton(
38          onPressed: _loading ? null : _confirm,
39          child: _loading
40              ? const SizedBox(width: 16, height: 16, child: CircularProgressIndicator(strokeWidth: 2))
41              : const Text('Confirm'),
42        ),
43      ],
44    );
45  }
46}

1import 'package:flutter/material.dart';
2import 'package:flutter_test/flutter_test.dart';
3
4void main() {
5  testWidgets('outside tap does not dismiss dialog', (tester) async {
6    await tester.pumpWidget(const MaterialApp(home: Scaffold(body: SizedBox.expand())));
7
8    final context = tester.element(find.byType(Scaffold));
9    // ignore: discarded_futures
10    showDeleteDialog(context);
11    await tester.pumpAndSettle();
12
13    await tester.tapAt(const Offset(4, 4));
14    await tester.pumpAndSettle();
15
16    expect(find.byType(AlertDialog), findsOneWidget);
17  });
18}