Widget buildPinPut() { return Pinput( onCompleted: (pin) => print(pin), ); } 

 final defaultPinTheme = PinTheme( width: 56, height: 56, textStyle: TextStyle(fontSize: 20, color: Color.fromRGBO(30, 60, 87, 1), fontWeight: FontWeight.w600), decoration: BoxDecoration( border: Border.all(color: Color.fromRGBO(234, 239, 243, 1)), borderRadius: BorderRadius.circular(20), ), ); 

 final focusedPinTheme = defaultPinTheme.copyDecorationWith( border: Border.all(color: Color.fromRGBO(114, 178, 238, 1)), borderRadius: BorderRadius.circular(8), ); final submittedPinTheme = defaultPinTheme.copyWith( decoration: defaultPinTheme.decoration.copyWith( color: Color.fromRGBO(234, 239, 243, 1), ), ); 

 final defaultPinTheme = PinTheme( width: 56, height: 56, textStyle: TextStyle(fontSize: 20, color: Color.fromRGBO(30, 60, 87, 1), fontWeight: FontWeight.w600), decoration: BoxDecoration( border: Border.all(color: Color.fromRGBO(234, 239, 243, 1)), borderRadius: BorderRadius.circular(20), ), ); final focusedPinTheme = defaultPinTheme.copyDecorationWith( border: Border.all(color: Color.fromRGBO(114, 178, 238, 1)), borderRadius: BorderRadius.circular(8), ); final submittedPinTheme = defaultPinTheme.copyWith( decoration: defaultPinTheme.decoration.copyWith( color: Color.fromRGBO(234, 239, 243, 1), ), ); return Pinput( defaultPinTheme: defaultPinTheme, focusedPinTheme: focusedPinTheme, submittedPinTheme: submittedPinTheme, validator: (s) { return s == '2222' ? null : 'Pin is incorrect'; }, pinputAutovalidateMode: PinputAutovalidateMode.onSubmit, showCursor: true, onCompleted: (pin) => print(pin), ); 

 /// Create Controller   final pinController = TextEditingController(); /// Set text programmatically   pinController.setText('1222'); /// Append typed character, useful if you are using custom keyboard   pinController.append('1', 4); /// Delete last character   pinController.delete(); /// Don't call setText, append, delete in build method, this is just illustration.   return Pinput( controller: pinController, ); 

 /// Create FocusNode   final pinputFocusNode = FocusNode(); /// Focus pinput   pinputFocusNode.requestFocus(); /// UnFocus pinput   pinputFocusNode.unfocus(); /// Don't call requestFocus, unfocus in build method, this is just illustration.   return Pinput( focusNode: pinputFocusNode, ); 

 /// Create key   final formKey = GlobalKey<FormState>(); /// Validate manually   /// Don't call validate in build method, this is just illustration.   formKey.currentState!.validate(); return Form( key: formKey, child: Pinput( /// Auto validate after user tap on keyboard done button, or completes Pinput   pinputAutovalidateMode: PinputAutovalidateMode.onSubmit, validator: (pin) { if (pin == '2224') return null; return 'Pin is incorrect'; }, ), ); 

 /// Theme of the pin in default state   final PinTheme? defaultPinTheme; /// Theme of the pin in focused state   final PinTheme? focusedPinTheme; /// Theme of the pin in submitted state   final PinTheme? submittedPinTheme; /// Theme of the pin in following state   final PinTheme? followingPinTheme; /// Theme of the pin in disabled state   final PinTheme? disabledPinTheme; /// Theme of the pin in error state   final PinTheme? errorPinTheme; /// If true keyboard will be closed   final bool closeKeyboardWhenCompleted; /// Displayed fields count. PIN code length.   final int length; /// Fires when user completes pin input   final ValueChanged<String>? onCompleted; /// Called every time input value changes.   final ValueChanged<String>? onChanged; /// See [EditableText.onSubmitted]   final ValueChanged<String>? onSubmitted; /// Called when user clicks on PinPut   final VoidCallback? onTap; /// In order to catch event [enableInteractiveSelection] should be false   final VoidCallback? onLongPress; /// Used to get, modify PinPut value and more.   /// Don't forget to dispose controller   /// ``` dart   /// @override   /// void dispose() {   /// controller.dispose();   /// super.dispose();   /// }   /// ```   final TextEditingController? controller; /// Defines the keyboard focus for this   /// To give the keyboard focus to this widget, provide a [focusNode] and then   /// use the current [FocusScope] to request the focus:   /// Don't forget to dispose focusNode   /// ``` dart   /// @override   /// void dispose() {   /// focusNode.dispose();   /// super.dispose();   /// }   /// ```   final FocusNode? focusNode; /// Widget that is displayed before field submitted.   final Widget? preFilledWidget; /// Sets the positions where the separator should be shown   final List<int>? separatorPositions; /// Builds a Pinput separator   final Widget? separator; /// Defines how [Pinput] fields are being placed inside [Row]   final MainAxisAlignment mainAxisAlignment; /// Defines how each [Pinput] field are being placed within the container   final AlignmentGeometry pinContentAlignment; /// curve of every [Pinput] Animation   final Curve animationCurve; /// Duration of every [Pinput] Animation   final Duration animationDuration; /// Animation Type of each [Pinput] field   /// options:   /// none, scale, fade, slide, rotation   final PinAnimationType pinAnimationType; /// Begin Offset of ever [Pinput] field when [pinAnimationType] is slide   final Offset? slideTransitionBeginOffset; /// Defines [Pinput] state   final bool enabled; /// See [EditableText.readOnly]   final bool readOnly; /// See [EditableText.autofocus]   final bool autofocus; /// Whether to use Native keyboard or custom one   /// when flag is set to false [Pinput] wont be focusable anymore   /// so you should set value of [Pinput]'s [TextEditingController] programmatically   final bool useNativeKeyboard; /// If true, paste button will appear on longPress event   final bool toolbarEnabled; /// Whether show cursor or not   /// Default cursor '|' or [cursor]   final bool showCursor; /// If [showCursor] true the focused field will show passed Widget   final Widget? cursor; /// The appearance of the keyboard.   /// This setting is only honored on iOS devices.   /// If unset, defaults to [ThemeData.brightness].   final Brightness? keyboardAppearance; /// See [EditableText.inputFormatters]   final List<TextInputFormatter> inputFormatters; /// See [EditableText.keyboardType]   final TextInputType keyboardType; /// Provide any symbol to obscure each [Pinput] pin   /// Recommended ●   final String obscuringCharacter; /// IF [obscureText] is true typed text will be replaced with passed Widget   final Widget? obscuringWidget; /// Whether hide typed pin or not   final bool obscureText; /// See [EditableText.textCapitalization]   final TextCapitalization textCapitalization; /// The type of action button to use for the keyboard.   ///   /// Defaults to [TextInputAction.newline] if [keyboardType] is   /// [TextInputType.multiline] and [TextInputAction.done] otherwise.   final TextInputAction? textInputAction; /// Configuration of toolbar options.   ///   /// If not set, select all and paste will default to be enabled. Copy and cut   /// will be disabled if [obscureText] is true. If [readOnly] is true,   /// paste and cut will be disabled regardless.   final ToolbarOptions toolbarOptions; /// See [EditableText.autofillHints]   final Iterable<String>? autofillHints; /// See [EditableText.enableSuggestions]   final bool enableSuggestions; /// See [EditableText.selectionControls]   final TextSelectionControls? selectionControls; /// See [TextField.restorationId]   final String? restorationId; /// Fires when clipboard has text of Pinput's length   final ValueChanged<String>? onClipboardFound; /// Use haptic feedback everytime user types on keyboard   /// See more details in [HapticFeedback]   final HapticFeedbackType hapticFeedbackType; /// See [EditableText.onAppPrivateCommand]   final AppPrivateCommandCallback? onAppPrivateCommand; /// See [EditableText.mouseCursor]   final MouseCursor? mouseCursor; /// Style of error text   final TextStyle? errorTextStyle; /// If [showError] is true and [errorBuilder] is passed it will be rendered under the Pinput   final PinputErrorBuilder? errorBuilder; /// Return null if pin is valid or any String otherwise   final FormFieldValidator<String>? validator; /// Return null if pin is valid or any String otherwise   final PinputAutovalidateMode pinputAutovalidateMode;