showNInputDialog function

Future<String?> showNInputDialog({ required BuildContext context, required String title, String? message, String? initialText, String confirmLabel = 'Save', String cancelLabel = 'Cancel', String? hintText, TextInputType? keyboardType, int maxLines = 1, String? validator(String?)?, })

Shows an input dialog returning the entered text.

Implementation

Future<String?> showNInputDialog({
  required BuildContext context,
  required String title,
  String? message,
  String? initialText,
  String confirmLabel = 'Save',
  String cancelLabel = 'Cancel',
  String? hintText,
  TextInputType? keyboardType,
  int maxLines = 1,
  String? Function(String?)? validator,
}) {
  final TextEditingController controller =
      TextEditingController(text: initialText);
  return showDialog<String>(
    context: context,
    child: Dialog(
      title: title,
      subtitle: message,
      content: TextField(
        controller: controller,
        keyboardType: keyboardType,
        maxLines: maxLines,
        decoration: InputDecoration(
          hintText: hintText,
          border: OutlineInputBorder(
              borderRadius: BorderRadius.circular(AppRadius.small)),
        ),
      ),
      actions: <Widget>[
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: Text(cancelLabel),
        ),
        FilledButton(
          onPressed: () {
            if (validator != null) {
              final String? error = validator(controller.text);
              if (error != null) {
                ScaffoldMessenger.of(context).showSnackBar(
                  SnackBar(content: Text(error)),
                );
                return;
              }
            }
            Navigator.of(context).pop(controller.text);
          },
          child: Text(confirmLabel),
        ),
      ],
    ),
  );
}