WheelOverlay class

An overlay shown on top of the wheel viewport, typically to highlight the currently selected row.

Usage:

// Outlined style (top/bottom lines) with horizontal inset
WheelOverlay.outlined(inset: 12);

// Filled rounded box style
WheelOverlay.filled(color: Colors.black12, cornerRadius: 8, inset: 16);
Inheritance

Constructors

WheelOverlay({Key? key, WidgetBuilder? builder, double? extent, double? offset, required Widget child})
const

Properties

builder → WidgetBuilder?
Optional builder that paints the overlay content. If null, only child is displayed.
final
child → Widget
The underlying wheel view.
final
extent → double?
Height of the overlay box. Usually matches the item extent.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
offset → double?
Vertical offset applied to the overlay (e.g. to account for headers).
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

build(BuildContext context) → Widget
Builds the wheel with the overlay stacked on top when builder is set.
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
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

Static Methods

delegate({Color? color, BoxBorder? border, BorderRadiusGeometry? borderRadius, EdgeInsetsGeometry? margin}) → WidgetBuilder
Creates a default overlay box with optional border and background color.
filled({Color? color, double? cornerRadius, double? inset}) → WidgetBuilder
Creates an overlay with a rounded background and margin inset.
outlined({Color? borderColor, double? inset}) → WidgetBuilder
Creates an overlay with horizontal border lines.