165977 Add focus support for CupertinoAlertDialogAction - #179224

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() => runApp(const AlertDialogApp());

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

  @override
  Widget build(BuildContext context) {
    return CupertinoApp(
      theme: CupertinoThemeData(brightness: Brightness.light),
      home: AlertDialogExample(),
    );
  }
}

class AlertDialogExample extends StatelessWidget {
  AlertDialogExample({super.key});

  FocusNode twoFocusNode = FocusNode();

  Future<void> _showModal(BuildContext context) {
    return showCupertinoModalPopup(
      context: context,
      builder: (BuildContext context) => CupertinoActionSheet(
        title: Text('title'),
        actions: <Widget>[
          CupertinoActionSheetAction(
            child: Text('text'),
            onPressed: () {
              Navigator.pop(context);
            },
          ),
          CupertinoActionSheetAction(
            child: Text('image'),
            onPressed: () {
              Navigator.pop(context);
            },
          ),
        ],
        cancelButton: CupertinoActionSheetAction(
          child: Text('cancel'),
          isDefaultAction: true,
          onPressed: () {
            Navigator.pop(context);
          },
        ),
      ),
    );
  }

  Future<void> _showAlertDialog(BuildContext context) {
    return showCupertinoDialog<void>(
      context: context,
      builder: (BuildContext context) => CupertinoAlertDialog(
        title: GestureDetector(
          child: const Text('Alert'),
          onTap: () {
            twoFocusNode.requestFocus();
            print(twoFocusNode.hasPrimaryFocus);
          },
        ),
        content: const Text('Proceed with destructive action?'),
        actions: <CupertinoDialogAction>[
          CupertinoDialogAction(
            isDefaultAction: true,
            onPressed: () {
              print('No');
              Navigator.pop(context);
            },
            child: const Text('No'),
          ),

          CupertinoDialogAction(
            isDestructiveAction: true,
            onPressed: () {
              print('Yes');
              Navigator.pop(context);
            },
            child: const Text('Yes'),
          ),
        ],
      ),
    );
  }

  Future<void> _showLongAlertDialog(BuildContext context) {
    return showCupertinoDialog<void>(
      context: context,
      builder: (BuildContext context) => CupertinoAlertDialog(
        title: GestureDetector(
          child: const Text('Alert'),
          onTap: () {
            twoFocusNode.requestFocus();
            print(twoFocusNode.hasPrimaryFocus);
          },
        ),
        content: const Text('Proceed with destructive action?'),
        actions: <CupertinoDialogAction>[
          CupertinoDialogAction(
            isDefaultAction: true,
            onPressed: () {
              print('No');
              Navigator.pop(context);
            },
            child: const Text('No'),
          ),
          CupertinoDialogAction(
            isDefaultAction: true,
            onPressed: () {
              print('Maybe');
              Navigator.pop(context);
            },
            child: const Text('Maybe'),
          ),

          CupertinoDialogAction(
            isDestructiveAction: true,
            onPressed: () {
              print('Yes');
              Navigator.pop(context);
            },
            child: const Text('Yes'),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      navigationBar: const CupertinoNavigationBar(
        middle: Text('CupertinoAlertDialog Sample'),
      ),
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            CupertinoButton(
              onPressed: () => _showAlertDialog(context),
              child: const Text('CupertinoAlertDialog'),
            ),
            CupertinoButton(
              onPressed: () => _showLongAlertDialog(context),
              child: const Text('long CupertinoAlertDialog'),
            ),
          ],
        ),
      ),
    );
  }
}