CylinderList class

A scrollable cylindrical picker where items are arranged on the surface of a vertical cylinder. Items in the centre of the visible arc appear full- size; items toward the edges wrap away and appear smaller with perspective.

This widget uses a ListWheelScrollView under the hood and adds a 3-D perspective overlay. The itemBuilder receives the item index.

Usage

CylinderList(
  itemCount: 20,
  itemBuilder: (ctx, i) => ListTile(title: Text('Item $i')),
  itemExtent: 48,
  cylinderRadius: 160,
)

Inheritance

Constructors

CylinderList({Key? key, required int itemCount, required IndexedWidgetBuilder itemBuilder, double itemExtent = 48, double cylinderRadius = 160, FixedExtentScrollController? scrollController, bool clipToSize = true, bool looping = true, Color? selectorColor, double? height}): const

Properties

clipToSize → bool: Clip the overflowing cylinder edges.
final
cylinderRadius → double: Radius of the virtual cylinder. Larger values = flatter curvature.
final
hashCode → int: The hash code for this object.
no setterinherited
height → double?: final
itemBuilder → IndexedWidgetBuilder: final
itemCount → int: final
itemExtent → double: Height of each item in logical pixels.
final
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
looping → bool: Whether the list wraps infinitely.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
scrollController → FixedExtentScrollController?: Optional external scroll controller.
final
selectorColor → Color?: Item selector highlight colour.
final

Methods

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<CylinderList>: Creates the mutable state for this widget at a given location in the tree.
override
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
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