Collection class

A versatile collection widget designed for managing and displaying groups of items within the Arcane UI component system.

The Collection widget serves as a flexible container for rendering lists of widgets, supporting both static children and dynamic builder patterns. It intelligently handles sliver-based layouts by detecting if children include sliver widgets such as Section, nested Collection, or other slivers via Widget.isSliver. This makes it ideal for use in scrollable views like CustomScrollView or as part of larger sliver compositions.

Key features:

• Supports static list of Widget children for simple, predefined content.
• Provides builder mode for efficient rendering of large or dynamic lists using IndexedWidgetBuilder.
• Custom builder mode utilizes MultiSliver for advanced sliver-based item generation.
• Automatically chooses between SListView for non-sliver children and MultiSliver for sliver-compatible content.
• Integrates with Pylon for reactive state management in dynamic collections.

Usage example:

Collection(
  children: [
    Section(title: 'Items'),
    CardCarousel(items: itemList),
  ],
)

Or for dynamic lists:

Collection.builder(
  builder: (context, index) => ListTile(title: Text('Item $index')),
  childCount: 100,
)

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• Collection

Mixed-in types

• SliverSignal

Available extensions

• AnimateWidgetExtensions
• DebugContainer
• IconExtension
• SkeletonExtension
• TextExtension
• WidgetExtension
• XAST
• XOnGestureWidget
• XSliverWidget
• XWidget
• XWidgetArcane
• XWidgetEdge
• XWidgetEffect
• XWidgetFrost
• XWidgetInvert
• XWidgetPixelate
• XWidgetPixelateBlur
• XWidgetRGB
• XWidgetWarp

Constructors

Collection({Key? key, List<Widget> children = const []})

The default constructor for creating a Collection with a static list of child widgets.

const

Collection.builder({Key? key, required IndexedWidgetBuilder? builder, int? childCount})

Creates a Collection using a builder for dynamic child generation.

const

Collection.custom({Key? key, required IndexedWidgetBuilder? builder, required int? childCount})

Creates a custom Collection using a builder with MultiSliver support.

const

Properties

asBuilder → NeverWidgetBuilder

Available on Widget, provided by the WidgetExtension extension

no setter

asSliver → Widget

Available on Widget, provided by the XWidgetArcane extension

no setter

base → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

black → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

blockQuote → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

blurIn → Widget

Available on Widget, provided by the XWidgetEffect extension

no setter

bold → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

builder → IndexedWidgetBuilder?

An optional builder function for dynamically generating child widgets at specific indices.

final

centered → Widget

Available on Widget, provided by the XWidget extension

no setter

childCount → int?

The total number of children when using a builder.

final

children → List<Widget>

The list of static child widgets to render within the collection.

final

customBuilder → bool

Indicates whether a custom builder is used, enabling MultiSliver for sliver-based rendering.

final

ellipsis → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

expand → Widget

Available on Widget, provided by the XWidget extension

no setter

extraBold → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

extraLight → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

firstP → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

flexible → Widget

Available on Widget, provided by the XWidget extension

no setter

foreground → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

h1 → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

h2 → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

h3 → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

h4 → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

hashCode → int

The hash code for this object.

no setter, inherited

ih → Widget

Available on Widget, provided by the XWidgetArcane extension

no setter

inlineCode → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

intrinsicHeight → Widget

Available on Widget, provided by the XWidget extension

no setter

intrinsicSize → Widget

Available on Widget, provided by the XWidget extension

no setter

intrinsicWidth → Widget

Available on Widget, provided by the XWidget extension

no setter

italic → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

iw → Widget

Available on Widget, provided by the XWidgetArcane extension

no setter

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

lead → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

li → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

light → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

medium → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

modify → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

mono → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

muted → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

normal → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

p → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

primaryForeground → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

safeArea → Widget

Available on Widget, provided by the XWidget extension

no setter

sans → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

scrollable → Widget

Available on Widget, provided by the XWidget extension

no setter

scrollableHorizontal → Widget

Available on Widget, provided by the XWidget extension

no setter

secondaryForeground → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

semiBold → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

singleLine → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

small → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textCenter → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textEnd → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textJustify → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textLarge → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textLeft → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textMuted → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textRight → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textSmall → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

textStart → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

thin → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

underline → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x2Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x3Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x4Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x5Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x6Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x7Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x8Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

x9Large → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

xLarge → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

xSmall → TextModifier

Available on Widget, provided by the TextExtension extension

no setter

Methods

animate({Key? key, List<Effect>? effects, AnimateCallback? onInit, AnimateCallback? onPlay, AnimateCallback? onComplete, bool? autoPlay, Duration? delay, AnimationController? controller, Adapter? adapter, double? target, double? value}) → Animate

Available on Widget, provided by the AnimateWidgetExtensions extension

Wraps the target Widget in an Animate instance, and returns the instance for chaining calls. Ex. myWidget.animate() is equivalent to Animate(child: myWidget).

asSkeleton({bool enabled = true, bool leaf = false, Widget? replacement, bool unite = false, AsyncSnapshot? snapshot}) → Widget

Available on Widget, provided by the SkeletonExtension extension

Converts the widget to a skeleton with advanced configuration options.

asSkeletonSliver({bool enabled = true}) → Widget

Available on Widget, provided by the SkeletonExtension extension

Converts the widget to a skeleton suitable for sliver layouts.

ast(int ml) → Widget

Available on Widget, provided by the XAST extension

build(BuildContext context) → Widget

Builds the Collection widget based on the provided configuration.

override

center({Key? key}) → Widget

Available on Widget, provided by the WidgetExtension extension

clip({Clip clipBehavior = Clip.hardEdge}) → Widget

Available on Widget, provided by the WidgetExtension extension

clipOval({Clip clipBehavior = Clip.antiAlias}) → Widget

Available on Widget, provided by the WidgetExtension extension

clipPath({Clip clipBehavior = Clip.antiAlias, required CustomClipper<Path> clipper}) → Widget

Available on Widget, provided by the WidgetExtension extension

clipRRect({BorderRadiusGeometry borderRadius = BorderRadius.zero, Clip clipBehavior = Clip.antiAlias}) → Widget

Available on Widget, provided by the WidgetExtension extension

constrained({double? minWidth, double? maxWidth, double? minHeight, double? maxHeight, double? width, double? height}) → Widget

Available on Widget, provided by the WidgetExtension extension

createElement() → StatelessElement

Creates a StatelessElement to manage this widget's location in the tree.

inherited

debugContainer([Color color = Colors.red]) → Widget

Available on Widget, provided by the DebugContainer extension

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

excludeSkeleton({bool exclude = true}) → Widget

Available on Widget, provided by the SkeletonExtension extension

Controls whether the widget should be preserved in skeleton mode.

expanded({int flex = 1}) → Widget

Available on Widget, provided by the WidgetExtension extension

iconDestructiveForeground() → Widget

Available on Widget, provided by the IconExtension extension

iconLarge() → Widget

Available on Widget, provided by the IconExtension extension

iconMedium() → Widget

Available on Widget, provided by the IconExtension extension

iconMutedForeground() → Widget

Available on Widget, provided by the IconExtension extension

iconPrimary() → Widget

Available on Widget, provided by the IconExtension extension

iconPrimaryForeground() → Widget

Available on Widget, provided by the IconExtension extension

iconSecondary() → Widget

Available on Widget, provided by the IconExtension extension

iconSecondaryForeground() → Widget

Available on Widget, provided by the IconExtension extension

iconSmall() → Widget

Available on Widget, provided by the IconExtension extension

iconX2Large() → Widget

Available on Widget, provided by the IconExtension extension

iconX2Small() → Widget

Available on Widget, provided by the IconExtension extension

iconX3Large() → Widget

Available on Widget, provided by the IconExtension extension

iconX3Small() → Widget

Available on Widget, provided by the IconExtension extension

iconX4Large() → Widget

Available on Widget, provided by the IconExtension extension

iconX4Small() → Widget

Available on Widget, provided by the IconExtension extension

iconXLarge() → Widget

Available on Widget, provided by the IconExtension extension

iconXSmall() → Widget

Available on Widget, provided by the IconExtension extension

ignoreSkeleton() → Widget

Available on Widget, provided by the SkeletonExtension extension

Excludes the widget from skeleton effects in its parent skeleton context.

intrinsic({double? stepWidth, double? stepHeight}) → Widget

Available on Widget, provided by the WidgetExtension extension

intrinsicHeight() → Widget

Available on Widget, provided by the WidgetExtension extension

intrinsicWidth({double? stepWidth, double? stepHeight}) → Widget

Available on Widget, provided by the WidgetExtension extension

isSliver(BuildContext context) → bool

Available on Widget, provided by the XSliverWidget extension

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onDoublePressed(VoidCallback action, {HitTestBehavior? behavior, Set<PointerDeviceKind>? supportedDevices}) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for double press/tap gestures to this widget in Arcane UI.

onHover(void action(bool hovering)) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for hover events to this widget in Arcane UI.

onLongPressed(VoidCallback action, {HitTestBehavior? behavior, Set<PointerDeviceKind>? supportedDevices}) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for long press gestures with the primary button to this widget in Arcane UI.

onLongSecondaryPressed(VoidCallback action, {HitTestBehavior? behavior, Set<PointerDeviceKind>? supportedDevices}) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for long press gestures with the secondary button to this widget in Arcane UI.

onLongTertiaryPressed(VoidCallback action, {HitTestBehavior? behavior, Set<PointerDeviceKind>? supportedDevices}) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for long press gestures with the tertiary button to this widget in Arcane UI.

onPressed(VoidCallback action, {HitTestBehavior? behavior, Set<PointerDeviceKind>? supportedDevices}) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for primary press/tap gestures to this widget in Arcane UI.

onSecondaryPressed(VoidCallback action, {HitTestBehavior? behavior, Set<PointerDeviceKind>? supportedDevices}) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for secondary press gestures (right-click) to this widget in Arcane UI.

onTertiaryPressed(VoidCallback action, {HitTestBehavior? behavior, Set<PointerDeviceKind>? supportedDevices}) → Widget

Available on Widget, provided by the XOnGestureWidget extension

Adds a handler for tertiary press gestures (middle-click) to this widget in Arcane UI.

pad(double all) → Widget

Available on Widget, provided by the XWidget extension

padBottom(double value) → Widget

Available on Widget, provided by the XWidget extension

padBy({double? left, double? top, double? right, double? bottom, double? horizontal, double? vertical}) → Widget

Available on Widget, provided by the XWidgetArcane extension

padHorizontal(double value) → Widget

Available on Widget, provided by the XWidgetArcane extension

padLeft(double value) → Widget

Available on Widget, provided by the XWidget extension

padOnly({double left = 0, double top = 0, double right = 0, double bottom = 0}) → Widget

Available on Widget, provided by the XWidget extension

padRight(double value) → Widget

Available on Widget, provided by the XWidget extension

padSliverBy({double? left, double? top, double? right, double? bottom, double? horizontal, double? vertical}) → Widget

Available on Widget, provided by the XWidgetArcane extension

padSliverHorizontal(double value) → Widget

Available on Widget, provided by the XWidgetArcane extension

padTop(double value) → Widget

Available on Widget, provided by the XWidget extension

positioned({Key? key, double? left, double? top, double? right, double? bottom}) → Widget

Available on Widget, provided by the WidgetExtension extension

shadeEdge(double radius) → Widget

Available on Widget, provided by the XWidgetEdge extension

shadeFrost(double value) → Widget

Available on Widget, provided by the XWidgetFrost extension

shadeInvert() → Widget

Available on Widget, provided by the XWidgetInvert extension

shadePixelate(double radius) → Widget

Available on Widget, provided by the XWidgetPixelate extension

shadePixelateBlur({int samples = 4, double pixelSize = 8, double radius = 2}) → Widget

Available on Widget, provided by the XWidgetPixelateBlur extension

shadeRGB({double radius = 5, double spin = 1}) → Widget

Available on Widget, provided by the XWidgetRGB extension

shadeWarp({double amplitude = 1, double frequency = 1, double z = 1, int octaves = 2}) → Widget

Available on Widget, provided by the XWidgetWarp extension

shadeWarpAnimation({double amplitude = 1, double frequency = 1, double z = 1, double zSpeed = 1, int octaves = 2}) → Widget

Available on Widget, provided by the XWidgetWarp extension

shimmer({bool loading = true}) → Widget

Available on Widget, provided by the XWidgetArcane extension

sized({double? width, double? height}) → Widget

Available on Widget, provided by the WidgetExtension extension

sized({double? width, double? height}) → Widget

Available on Widget, provided by the XWidget extension

then(InlineSpan span) → Widget

Available on Widget, provided by the TextExtension extension

thenButton({required VoidCallback onPressed, required Widget child}) → Widget

Available on Widget, provided by the TextExtension extension

thenInlineCode(String text) → Widget

Available on Widget, provided by the TextExtension extension

thenText(String text) → Widget

Available on Widget, provided by the TextExtension extension

toBox(BuildContext context, {bool softWarn = true}) → Widget

Available on Widget, provided by the XSliverWidget extension

toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode

Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.

inherited

toSliver(BuildContext context, {bool fillRemaining = false, bool softWarn = true}) → Widget

Available on Widget, provided by the XSliverWidget extension

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

transform({Key? key, required Matrix4 transform}) → Widget

Available on Widget, provided by the WidgetExtension extension

withAlign(AlignmentGeometry alignment) → Widget

Available on Widget, provided by the WidgetExtension extension

withMargin({double? top, double? bottom, double? left, double? right, double? horizontal, double? vertical, double? all}) → Widget

Available on Widget, provided by the WidgetExtension extension

withOpacity(double opacity) → Widget

Available on Widget, provided by the WidgetExtension extension

withPadding({double? top, double? bottom, double? left, double? right, double? horizontal, double? vertical, double? all, EdgeInsetsGeometry? padding}) → Widget

Available on Widget, provided by the WidgetExtension extension

withTooltip(String tooltip) → Widget

Available on Widget, provided by the XWidgetArcane extension

Operators

operator ==(Object other) → bool

The equality operator.

inherited