ToggleEffect class

Effect that allows you to toggle the behavior of a builder function at a certain point in time.

Animate().toggle(duration: 500.ms, builder: (_, value, __) =>
  Text('${value ? "Before Delay" : "After Delay"}'))

This is also useful for triggering animation in "Animated" widgets.

foo.animate().toggle(duration: 500.ms, builder: (_, value, child) =>
  AnimatedOpacity(opacity: value ? 0 : 1, child: child))

The child of Animate is passed through to the builder in the child param (possibly already wrapped by prior effects).

Inheritance
Annotations

Constructors

ToggleEffect({Duration? delay, Duration? duration, required ToggleEffectBuilder builder})
const

Properties

begin → void
The begin value for the effect. If null, effects should use a reasonable default value when appropriate.
finalinherited
builder → ToggleEffectBuilder
final
curve → Curve?
The specified curve for the effect. If null, will use the curve from the previous effect, or Animate.defaultCurve if this is the first effect.
finalinherited
delay → Duration?
The specified delay for the effect. If null, will use the delay from the previous effect, or Duration.zero if this is the first effect.
finalinherited
duration → Duration?
The specified duration for the effect. If null, will use the duration from the previous effect, or Animate.defaultDuration if this is the first effect.
finalinherited
end → void
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
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 necessary to implement the effect, based on the provided AnimationController and EffectEntry.
override
buildAnimation(AnimationController controller, EffectEntry entry) → Animation<void>
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