GaugePointer class

An additional needle that can be overlaid on a RadialGauge.

Use RadialGauge.extraPointers to add one or more secondary needles, for example to show a speed limit, a target value, or a min/max marker.

RadialGauge(
  controller: speedCtrl,
  min: 0, max: 200,
  extraPointers: [
    GaugePointer(
      controller: limitCtrl,
      color: Colors.red,
      label: 'Speed limit',
    ),
  ],
)

Constructors

GaugePointer({required GaugeController controller, Color? color, double? strokeWidth, double lengthFraction = 0.75, String? label})

Creates a gauge pointer.

const

Properties

color → Color?

Needle colour. Defaults to the gauge token needle colour at 70% opacity.

final

controller → GaugeController

The controller that drives this pointer's angular position.

final

hashCode → int

The hash code for this object.

no setter, inherited

label → String?

Semantic label for this pointer, announced by screen readers.

final

lengthFraction → double

Fraction of the gauge radius that the needle extends to (0.0–1.0). Defaults to 0.75, which places the tip slightly inside the main needle.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

strokeWidth → double?

Needle stroke width. Defaults to the gauge token needle width.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited