GaugeChartWidget class

A modern gauge chart widget for displaying a single metric value.

This widget displays a value on a semi-circular or circular gauge, useful for KPIs, progress indicators, and single-value metrics.

Features

  • Customizable value range
  • Smooth animations
  • Customizable segments
  • Full theme support

Example

GaugeChartWidget(
  value: 75,
  minValue: 0,
  maxValue: 100,
  theme: ChartTheme.light(),
  title: 'Performance',
)
Inheritance

Constructors

GaugeChartWidget({Key? key, required double value, double minValue = 0.0, double maxValue = 100.0, int segments = 5, double startAngleDegrees = 180.0, double sweepAngleDegrees = 180.0, ChartTheme? theme, bool showGrid = true, bool showAxis = true, bool showLabel = true, String? title, String? subtitle, String? centerLabel, String? unit, bool useGlassmorphism = false, bool useNeumorphism = false, VoidCallback? onChartTap, bool isLoading = false, bool isError = false, String? errorMessage})
const

Properties

centerLabel → String?
final
errorMessage → String?
final
hashCode → int
The hash code for this object.
no setterinherited
isError → bool
final
isLoading → bool
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
maxValue → double
The maximum value of the gauge.
final
minValue → double
The minimum value of the gauge.
final
onChartTap → VoidCallback?
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
segments → int
The number of segments/divisions on the gauge.
final
showAxis → bool
final
showGrid → bool
final
showLabel → bool
final
startAngleDegrees → double
The start angle in degrees (0 is right, positive is clockwise).
final
subtitle → String?
final
sweepAngleDegrees → double
The sweep angle in degrees (how much of the circle to use).
final
theme → ChartTheme?
final
title → String?
final
unit → String?
final
useGlassmorphism → bool
final
useNeumorphism → bool
final
value → double
The current value to display on the gauge.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<GaugeChartWidget>
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