CharacterInputOTPChild class

A character-based OTP input field with validation and transformation.

Supports filtering input based on codepoint predicates and transforming input characters (e.g., converting to uppercase). Commonly used for creating numeric or alphanumeric OTP fields.

Example:

CharacterInputOTPChild(
  predicate: CharacterInputOTPChild.isDigit,
  keyboardType: TextInputType.number,
)
Inheritance

Constructors

CharacterInputOTPChild({CodepointPredicate? predicate, CodepointUnaryOperator? transform, bool obscured = false, bool readOnly = false, TextInputType? keyboardType})
Creates a CharacterInputOTPChild.
const

Properties

hashCode → int
The hash code for this object.
no setterinherited
hasValue → bool
Whether this child can hold a value (i.e., is an input field).
no setteroverride
keyboardType → TextInputType?
The keyboard type to use for input.
final
obscured → bool
Whether to obscure the input character.
final
predicate → CodepointPredicate?
Predicate to validate allowed codepoints.
final
readOnly → bool
Whether the input is read-only.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
transform → CodepointUnaryOperator?
Function to transform codepoints before storing.
final

Methods

build(BuildContext context, InputOTPChildData data) → Widget
Builds the widget for this OTP child.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

isAlphabetLower(int codepoint) → bool
Tests if the codepoint is a lowercase letter (a-z).
isAlphabetUpper(int codepoint) → bool
Tests if the codepoint is an uppercase letter (A-Z).
isDigit(int codepoint) → bool
Tests if the codepoint is a digit (0-9).
lowerToUpper(int codepoint) → int
Converts a lowercase letter to uppercase.
upperToLower(int codepoint) → int
Converts an uppercase letter to lowercase.