Transition class final

How two adjacent scenes blend at their boundary.

A transition is pure authoring data — one value class for every kind, with the variant parameter non-null exactly for its own kind:

Transition.cut()
Transition.crossFade(0.5.seconds, overlap: true)
Transition.wipe(0.4.seconds, direction: Edge.right)
Transition.zoom(0.6.seconds, into: Alignment.center)
Transition.slide(0.4.seconds, from: Edge.right)

overlap controls timing: true means the two scenes share the blend window and the total video shortens by duration; false means each scene plays its full length and the blend overlays the incoming scene's first frames while the outgoing is held at its final frame.

Annotations

Constructors

Transition.crossFade(Time duration, {bool overlap = true, Curve ease = Ease.linear})
A dissolve lasting duration: the incoming scene fades in over the outgoing one, with no dip to the background in between.
const
Transition.cut()
A hard cut: zero duration, no overlap, no blend window at all.
const
Transition.slide(Time duration, {Edge? from = Edge.right, bool overlap = true, Curve ease = Ease.linear})
A push lasting duration: the incoming scene slides in from the from edge while the outgoing slides off toward the opposite one.
const
Transition.wipe(Time duration, {Edge? direction = Edge.right, bool overlap = true, Curve ease = Ease.linear})
A reveal lasting duration whose front travels toward direction: Edge.right uncovers the incoming scene left-to-right.
const
Transition.zoom(Time duration, {Alignment? into = Alignment.center, bool overlap = true, Curve ease = Ease.linear})
A zoom lasting duration: the outgoing scene scales up anchored at into while fading out over the incoming one.
const

Properties

direction → Edge?
The direction of travel of a TransitionKind.wipe front; null for every other kind.
final
duration → Time
How long the blend window lasts. Must be absolute (frames, seconds, or ms): a boundary sits between two scenes, so a relative duration is ambiguous and rejected at resolution time.
final
ease → Curve
The easing applied to the blend progress; defaults to Ease.linear (a plain dissolve reads linear — opinionated motion is one parameter away).
final
from → Edge?
The edge a TransitionKind.slide pushes in from; null for every other kind.
final
hashCode → int
The hash code for this object.
no setteroverride
into → Alignment?
The anchor a TransitionKind.zoom scales into; null for every other kind.
final
kind → TransitionKind
Which blend this transition performs.
final
overlap → bool
Whether the two scenes share the blend window.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
The factory-call form, omitting ease: curve singletons have no stable textual form, and identity equality makes one up unhelpful.
override

Operators

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