LegendLinear class

A legend for continuous/linear data showing a color gradient.

LegendLinear displays a gradient bar with tick labels to show the mapping between numeric values and colors in a continuous color scale.

Example usage:

LegendLinear(
  scale: scaleSequential(
    domain: [0, 100],
    interpolator: interpolateBlues,
  ),
  config: LegendLinearConfig(
    length: 200,
    labelCount: 5,
  ),
)
Inheritance

Constructors

LegendLinear({Key? key, required dynamic scale, LegendLinearConfig config = const LegendLinearConfig(), List<double>? tickValues, String tickFormat(double)?, String? title, TextStyle? titleStyle})
Creates a linear legend.
const

Properties

config → LegendLinearConfig
Configuration for the legend.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scale → dynamic
The continuous color scale to visualize.
final
tickFormat → String Function(double)?
Custom tick format function.
final
tickValues → List<double>?
Custom tick values for labels.
final
title → String?
Optional title for the legend.
final
titleStyle → TextStyle?
Text style for the title.
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