showDestructiveDialogue method Null safety

void showDestructiveDialogue(
  1. {required BuildContext context,
  2. required String title,
  3. required String message,
  4. required Future<void> onConfirm(
      )}
    )

    Shows a destructive dialogue containing a negative title and message, for confirming the execution of a destructive action. For example, deleting a message.

    One action is to 'Cancel' which closes the dialogue, doing nothing. The other action is 'Delete' which executes the destructive action onConfirm.

    Implementation

    static void showDestructiveDialogue(
    {required BuildContext context,
    required String title,
    required String message,
    required Future<void> Function() onConfirm}) {
  showDialog(
    context: context,
    builder: (BuildContext context) => AlertDialog(
      title: Text(title),
      content: Text(message),
      actions: <Widget>[
        TextButton(
          onPressed: () => Navigator.pop(context),
          child: const Text('Cancel'),
          style: ButtonStyle(
            foregroundColor: MaterialStateProperty.all(Colors.black),
          ),
        ),
        TextButton(
          onPressed: () async {
            await onConfirm();
            Navigator.pop(context);
          },
          child: const Text("Delete"),
          style: ButtonStyle(
            foregroundColor: MaterialStateProperty.all(Colors.red),
          ),
        ),
      ],
    ),
  );
}