SliverFadeEffect class

Animates the opacity of a sliver via SliverFadeTransition.

Defaults to begin=0, end=1, matching FadeEffect. The child must produce a sliver, such as SliverList or SliverGrid, inside a viewport. This effect preserves scroll geometry and can be composed with other sliver effects; ordinary box effects such as FadeEffect are not sliver wrappers.

Zero opacity does not disable hit testing. Use SliverIgnorePointer when invisible content must not receive input. Hidden content is excluded from semantics unless alwaysIncludeSemantics is true.

Inheritance
Annotations

Constructors

SliverFadeEffect({Duration? delay, Duration? duration, Curve? curve, Curve? reverseCurve, double? begin, double? end, bool alwaysIncludeSemantics = false})
const

Properties

alwaysIncludeSemantics → bool
Keeps semantic information present even when opacity is zero.
final
begin → double?
The begin value for the effect. If null, effects should use a reasonable default value when appropriate.
finalinherited
curve → Curve?
The specified easing curve for the effect. If null, will inherit the curve from the previous effect, or use Animate.defaultCurve if this is the first effect.
finalinherited
delay → Duration?
The specified delay for the effect. If null, will inherit the delay from the previous effect, or use Duration.zero if this is the first effect.
finalinherited
duration → Duration?
The specified duration for the effect. If null, will inherit the duration from the previous effect, or use Animate.defaultDuration if this is the first effect.
finalinherited
end → double?
The end value for the effect. If null, effects should use a reasonable default value when appropriate.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
reverseCurve → Curve?
The reverse easing curve, inherited from the previous effect when null. With no inherited reverse curve, curve is used in both directions. Like CurvedAnimation, a mid-flight reversal retains its current curve until the controller reaches an endpoint, avoiding a discontinuity.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

build(BuildContext context, Widget child, AnimationController controller, EffectEntry entry) → Widget
Builds the widgets that implement the effect on the target child, based on the provided AnimationController and EffectEntry.
override
buildAnimation(AnimationController controller, EffectEntry entry) → Animation<double>
Returns an animation based on the controller, entry, and begin/end values.
inherited
getBeginRatio(AnimationController controller, EffectEntry entry) → double
Returns a ratio corresponding to the beginning of the specified entry.
inherited
getEndRatio(AnimationController controller, EffectEntry entry) → double
Returns a ratio corresponding to the end of the specified entry.
inherited
getOptimizedBuilder<U>({required ValueListenable<U> animation, Widget? child, required TransitionBuilder builder}) → AnimatedBuilder
Returns an optimized AnimatedBuilder that doesn't rebuild if the value hasn't changed.
inherited
getToggleBuilder({required ValueListenable<double> animation, required Widget child, required bool toggle(), required ToggleEffectBuilder builder}) → AnimatedBuilder
Returns an AnimatedBuilder that rebuilds when the boolean value returned by the toggle function changes.
inherited
isAnimationActive(Animation animation) → bool
Check if the animation is currently running / active.
inherited
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

Constants

defaultValue → const double
neutralValue → const double