ArcGauge class

A partial-arc progress gauge with rich overlay and layout support.

Place a child widget at the centre, attach header / footer labels, or use a widgetIndicator that moves with the arc tip. The reverse flag fills the arc from the far end, fillColor colours the inner circle, and unitText appends a unit suffix to the auto-formatted centre value.

ArcGauge(
  controller: cpuCtrl,
  unitText: '%',
  fillColor: Colors.black12,
  header: const Text('CPU', style: TextStyle(fontWeight: FontWeight.bold)),
  footer: const Text('utilisation'),
)
Inheritance

Constructors

ArcGauge({Key? key, required GaugeController controller, double min = 0, double max = 100, double startAngleDeg = 135, double sweepAngleDeg = 270, String? centerLabel, TextStyle? centerLabelStyle, List<GaugeRange> ranges = const [], GaugeStyle? style, GaugeMode? mode, String? semanticsLabel, Widget? child, Widget? header, Widget? footer, Color? fillColor, bool reverse = false, bool showValue = true, String? unitText, Widget? widgetIndicator, double? backgroundWidth})
const
ArcGauge.cpuUsage({Key? key, required GaugeController controller, GaugeStyle? style, GaugeMode? mode, Widget? child, Widget? header, Widget? footer, Widget? widgetIndicator, String? semanticsLabel})
CPU usage preset (0–100 %).
factory
ArcGauge.networkSpeed({Key? key, required GaugeController controller, double maxMbps = 100, GaugeStyle? style, GaugeMode? mode, Widget? child, Widget? header, Widget? footer, String? unitText, Widget? widgetIndicator, String? semanticsLabel})
Download/upload speed preset (0–maxMbps Mbps).
factory

Properties

backgroundWidth → double?
Override for the background track stroke width (logical pixels).
final
centerLabel → String?
Overrides the auto-formatted centre value label.
final
centerLabelStyle → TextStyle?
Text style for the centre label.
final
child → Widget?
Widget shown at the centre of the gauge (replaces the canvas value label when provided).
final
controller → GaugeController
final
fillColor → Color?
Solid fill colour for the circle inside the arc track.
final
Widget shown directly below the gauge.
final
hashCode → int
The hash code for this object.
no setterinherited
Widget shown directly above the gauge.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
max → double
final
min → double
final
mode → GaugeMode?
Ambient / instrument rendering mode.
final
ranges → List<GaugeRange>
Coloured band segments drawn over the background track.
final
reverse → bool
When true, fills the arc from the far (clockwise) end of the track rather than from the start.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticsLabel → String?
Accessibility label announced by screen readers.
final
showValue → bool
Whether to render the auto-formatted value in the centre.
final
startAngleDeg → double
final
style → GaugeStyle?
Visual style. Falls back to GaugeThemeExtension then DefaultGaugeStyle.
final
sweepAngleDeg → double
final
unitText → String?
Unit suffix appended to the auto-formatted centre label (e.g. '%').
final
widgetIndicator → Widget?
Widget that tracks the current arc tip position.
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