OtpCodeVerificationField constructor

const OtpCodeVerificationField({ int numberOfDigits = 6, OtpCodeType? codeType, OtpCodeLetterCasing? codeLetterCasing, OtpCodeLetterSet? codeLetterSet, String customSet = '', bool autoFocus = true, ValueChanged<String>? onChanged, required Future<bool> onSubmit(String code), bool showCountdown = true, required DateTime? countdownStartDateTime, Duration countdownDuration = const Duration(minutes: 30), required VoidCallback onExpiredGoBack, bool showWrongCodeMessage = true, String wrongCodeMessage = 'Enter the correct code', String verificationFailedMessageBuilder({ Object? error, }) = defaultVerificationFailedMessageBuilder, String retryButtonLabel = 'Retry', String expiredMessage = 'Your code expired', String expiredButtonLabel = 'Go back to try again', String countdownTextBuilder({ required int secondsCountdown, }) = defaultCountdownText, Widget countdownContainerBuilder({ required Widget child, }) = defaultCountdownContainerBuilder, Widget errorContainerBuilder({ required Widget child, }) = defaultErrorContainerBuilder, Widget digitContainerBuilder({ required Color? activeBorderColor, required Color? backgroundColor, required Color? borderColor, required Widget child, required bool isCurrentDigit, }) = defaultDigitContainerBuilder, Widget buttonBuilder({ required Color? backgroundColor, required String label, required VoidCallback onTap, required Color? textColor, required TextStyle? textStyle, })?, TextStyle? digitTextStyle, TextStyle? errorTextStyle, TextStyle? expiredTextStyle, TextStyle? countdownTextStyle, TextStyle? buttonTextStyle, Color? digitBackgroundColor, Color? digitBorderColor, Color? digitActiveBorderColor, Color? cursorColor, Size? cursorSize = const Size(3, 30), Color? buttonBackgroundColor, Color? buttonTextColor, bool debugShowTextField = false, Key? key, })

Implementation

const OtpCodeVerificationField({
  this.numberOfDigits = 6,
  this.codeType,
  this.codeLetterCasing,
  this.codeLetterSet,
  this.customSet = '',
  this.autoFocus = true,
  this.onChanged,
  required this.onSubmit,
  this.showCountdown = true,
  required this.countdownStartDateTime,
  this.countdownDuration = const Duration(minutes: 30),
  required this.onExpiredGoBack,
  this.showWrongCodeMessage = true,
  this.wrongCodeMessage = 'Enter the correct code',
  this.verificationFailedMessageBuilder = defaultVerificationFailedMessageBuilder,
  this.retryButtonLabel = 'Retry',
  this.expiredMessage = 'Your code expired',
  this.expiredButtonLabel = 'Go back to try again',
  this.countdownTextBuilder = defaultCountdownText,
  this.countdownContainerBuilder = defaultCountdownContainerBuilder,
  this.errorContainerBuilder = defaultErrorContainerBuilder,
  this.digitContainerBuilder = defaultDigitContainerBuilder,
  this.buttonBuilder,
  this.digitTextStyle,
  this.errorTextStyle,
  this.expiredTextStyle,
  this.countdownTextStyle,
  this.buttonTextStyle,
  this.digitBackgroundColor,
  this.digitBorderColor,
  this.digitActiveBorderColor,
  this.cursorColor,
  this.cursorSize = const Size(3, 30),
  this.buttonBackgroundColor,
  this.buttonTextColor,
  this.debugShowTextField = false,
  super.key,
}) : assert(
       numberOfDigits >= 2 && numberOfDigits <= 50,
       'numberOfDigits must be in [2, 50]',
     ),
     assert(
       codeLetterSet != OtpCodeLetterSet.custom || customSet != '',
       'customSet must be non-empty when codeLetterSet is OtpCodeLetterSet.custom',
     ),
     // aToZ / unicodeLetters / custom are letter-portion sets — they
     // can't be combined with codeType=numbersOnly (no letters allowed).
     assert(
       (codeLetterSet != OtpCodeLetterSet.aToZ &&
               codeLetterSet != OtpCodeLetterSet.unicodeLetters &&
               codeLetterSet != OtpCodeLetterSet.custom) ||
           codeType != OtpCodeType.numbersOnly,
       'codeLetterSet aToZ / unicodeLetters / custom requires codeType '
       'to be lettersOnly, numbersAndLetters, or null',
     ),
     // binary is digits-only; codeType must be numbersOnly or null.
     assert(
       codeLetterSet != OtpCodeLetterSet.binary ||
           codeType == null ||
           codeType == OtpCodeType.numbersOnly,
       'codeLetterSet binary requires codeType to be numbersOnly or null',
     ),
     // crockford / hexadecimal / base62 mix digits and letters; codeType
     // must be numbersAndLetters or null.
     assert(
       (codeLetterSet != OtpCodeLetterSet.crockford &&
               codeLetterSet != OtpCodeLetterSet.hexadecimal &&
               codeLetterSet != OtpCodeLetterSet.base62) ||
           codeType == null ||
           codeType == OtpCodeType.numbersAndLetters,
       'codeLetterSet crockford / hexadecimal / base62 requires codeType '
       'to be numbersAndLetters or null',
     ),
     // base62 keeps both cases distinct; forced casing would defeat it.
     assert(
       codeLetterSet != OtpCodeLetterSet.base62 ||
           codeLetterCasing == null ||
           codeLetterCasing == OtpCodeLetterCasing.mixed,
       'codeLetterSet base62 requires codeLetterCasing to be mixed or null',
     );