BlurTransitionPlugin class

Animates a Gaussian blur from maxSigma → 0 (reveal) or 0 → maxSigma (exit).

⚠️ EXPENSIVE — uses ImageFilter.blur. Disabled automatically by FrameBudgeter when FPS drops below threshold.

Params:

  • sigma (double) — Maximum blur radius. Default: 12.0

Usage:

MotionWidget(
  transition: BlurTransitionPlugin(),
  params: {'sigma': 20.0},
  child: myWidget,
)
Inheritance

Constructors

BlurTransitionPlugin()
const

Properties

affectedProperties → List<AnimatableProperty>
All widget properties this transition modifies. Used by FrameBudgeter to decide whether to skip expensive effects.
no setteroverride
description → String
Human-readable description of this transition (optional, for tooling).
no setteroverride
hashCode → int
The hash code for this object.
no setterinherited
id → String
Unique identifier used to look up this plugin in TransitionRegistry.
no setteroverride
isExpensive → bool
True when this effect uses expensive GPU operations (blur, shader, clip). The FrameBudgeter will disable expensive plugins under FPS threshold.
no setteroverride
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

build({required Animation<double> animation, required Widget child, Map<String, Object?> params = const {}}) → Widget
Builds the animated widget for the forward direction.
override
buildCurved({required Animation<double> animation, required Curve curve, required Widget child, Map<String, Object?> params = const {}}) → Widget
Helper — wraps build with a CurvedAnimation.
inherited
buildReverse({required Animation<double> animation, required Widget child, Map<String, Object?> params = const {}}) → Widget
Builds the animated widget for the reverse direction.
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