LegendOrdinal<T> class

A legend for categorical/ordinal data.

LegendOrdinal works with ordinal scales to display a legend that maps discrete domain values to colors or other visual properties.

Example usage:

LegendOrdinal(
  scale: scaleOrdinal(
    domain: ['A', 'B', 'C'],
    range: [Colors.blue, Colors.red, Colors.green],
  ),
  config: LegendConfig(direction: LegendDirection.horizontal),
)
Inheritance

Constructors

LegendOrdinal({Key? key, required dynamic scale, Map<T, String>? labels, LegendConfig config = const LegendConfig(), void onTap(T value, int index)?, Set<T>? selectedValues, double inactiveOpacity = 0.3})
Creates an ordinal legend.
const

Properties

config → LegendConfig
Configuration for the legend.
final
hashCode → int
The hash code for this object.
no setterinherited
inactiveOpacity → double
Opacity for unselected items.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
labels → Map<T, String>?
Optional custom labels for domain values.
final
onTap → void Function(T value, int index)?
Callback when an entry is tapped.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scale → dynamic
The ordinal scale to use.
final
selectedValues → Set<T>?
Set of selected values (for toggleable legends).
final

Methods

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
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