UnderlineEffect class

Draws an animated underline beneath each character.

The underline grows from left to right per character, with configurable lineColor and underline height.

Inheritance

Constructors

UnderlineEffect({Duration duration = const Duration(milliseconds: 600), Curve curve = Curves.easeOut, Color? lineColor, double height = 2.0, Duration delayBetweenChars = const Duration(milliseconds: 30)}): Creates an underline drawing animation.
const

curve → Curve: Curve applied to the animation timing for easing.
finalinherited
delayBetweenChars → Duration: Delay between each successive character's animation start.
finalinherited
duration → Duration: Total duration of one full animation cycle for a single character.
finalinherited
hashCode → int: The hash code for this object.
no setterinherited
height → double: Thickness of the underline in logical pixels.
final
lineColor → Color?: Color of the underline. Defaults to the text color if null.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

applyCurve(double t) → double: Applies the effect's curve to a linear value t (0.0–1.0).
inherited
getAnimations(double progress, int charCount) → List<CharacterAnimation>: Generates per-character underline progress animations.
override
getTotalDuration(int charCount) → Duration: Returns the total duration needed to animate all charCount characters.
inherited
noise(int index, [int offset = 0]) → double: Returns a deterministic pseudo-random value (0.0–1.0) for the given index and optional offset.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
staggeredProgress(double globalProgress, int index, int charCount) → double: Computes the per-character progress for staggered animations.
inherited
toString() → String: A string representation of this object.
inherited