Scene class final

A time-bounded section of a video — the single source of truth for everything inside it.

A scene must have a length: duration is required, and the type system (not a runtime assert) enforces it. The Video parent owns the running offsets and mounts a SceneScope above each scene, so a Scene renders only its content: a Stack aligned to the canvas center — video framing convention, so a bare Text child reads well without layout boilerplate.

Scenes are not standalone widgets: outside a Video there is no time scope to resolve against, and building one throws a FluvieTimingError.

Inheritance
Available extensions

Constructors

Scene({required Time duration, Background? background, List<Widget> children = const [], Defaults? motionDefaults, List<Audio> audio = const [], Transition? enter, Transition? exit, Camera? camera, Key? key})
Creates a scene lasting duration showing children on its canvas, optionally over a static background.
const
Scene.centered({required Time duration, required Widget child, Background? background, Defaults? motionDefaults, List<Audio> audio = const [], Transition? enter, Transition? exit, Camera? camera, Key? key})
A single-child convenience: child mounted centered on the canvas — children: [Center(child: child)], nothing more.
Scene.sequence({required TimelineSchedule timeline, Background? background, List<Widget> children = const [], Defaults? motionDefaults, List<Audio> audio = const [], Transition? enter, Transition? exit, Camera? camera, Key? key})
A scene whose duration comes from a TimelineSchedule — the scene lasts exactly as long as the schedule it hosts.
factory

Properties

audio → List<Audio>
Audio tracks scoped to this scene — authoring data the audio pipeline mounts at render.
final
background → Background?
The static backdrop behind children, or null for none. It is simply the first Stack child — the same Background widget works as an animated, anchored child in children instead (the gradient shift).
final
camera → Camera?
The scene-wide camera move, or null for a static frame.
final
children → List<Widget>
The scene's content, stacked in declaration order and aligned to the canvas center.
final
duration → Time
How long the scene lasts. Must be absolute (frames, seconds, or ms): scene durations define the video length, so a relative duration would be a fraction of itself.
final
enter → Transition?
The transition this scene wants on the boundary it enters across.
final
exit → Transition?
The transition this scene wants on the boundary it exits across.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
motionDefaults → Defaults?
Scene-level animation defaults, layered between each element's own defaults and the video's; null inherits unchanged.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

animate(List<Animation> animations, {Anchor? anchor, TimeRange? window, Defaults? defaults}) → Widget

Available on Widget, provided by the Animate extension

Binds animations to this widget by wrapping it in a MotionTarget.
build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
show({Time? from, Time? to}) → Widget

Available on Widget, provided by the Animate extension

Visibility-window sugar: animate([], window: from.to(to)) with from defaulting to the window start and to to its end.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

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