GaugeAnnotation class Null safety

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. [...]
final, inherited
hashCode int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
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. [...]
final, inherited
positionFactor double
Specifies the position of annotation in radius factor. [...]
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
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. [...]
@protected, 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.
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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}) 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. [...]
@nonVirtual, inherited