GaugeAnnotation class

RadialAxis allows to add widgets such as text and image as an annotation to a specific point of interest in the radial gauge.

GaugeAnnotation provides options to add any image, text or other widget over a gauge widget with respect to angle or axisValue. Display the current progress or pointer value inside the gauge using a text widget annotation.

Widget build(BuildContext context) {
   return Container(
       child: SfRadialGauge(
         axes:<RadialAxis>[RadialAxis(
           annotations: <GaugeAnnotation>[
           GaugeAnnotation(widget: Text('Annotation'))
           ]
           )]
       ));
}
Inheritance

Constructors

GaugeAnnotation({Key? key, double? axisValue, GaugeAlignment horizontalAlignment = GaugeAlignment.center, double? angle, GaugeAlignment verticalAlignment = GaugeAlignment.center, double positionFactor = 0, required Widget widget})
Create an GaugeAnnotation with the required properties.
const

Properties

angle → double?
Specifies the angle for positioning the annotation
final
axisValue → double?
Specifies the axis value for positioning annotation.
final
child → Widget?
The widget below this widget in the tree.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
horizontalAlignment → GaugeAlignment
How the annotation should be aligned horizontally in the respective position.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
positionFactor → double
Specifies the position of annotation in radius factor.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
verticalAlignment → GaugeAlignment
How the annotation should be aligned vertically in the respective position.
final
widget → Widget
Specifies the annotation widget.
final

Methods

createElement() → SingleChildRenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
createRenderObject(BuildContext context) → RenderObject
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.
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
didUnmountRenderObject(covariant RenderObject renderObject) → void
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
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
updateRenderObject(BuildContext context, covariant RenderGaugeAnnotation renderObject) → void
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited