WidgetPointer class Null safety

Create the pointer to indicate the value with built-in shape.

To highlight values, set any desired widget to child property.

Widget build(BuildContext context) {
   return Container(
       child: SfRadialGauge(
         axes:<RadialAxis>[RadialAxis(
            pointers: <GaugePointer>[WidgetPointer(value: 50,
             widget: Container( height: 30, width: 30,
                  decoration: BoxDecoration(
                    shape: BoxShape.circle,
                    border: Border.all(color: Colors.red)),
                      child: Icon( Icons.check, color: Colors.black ))
            )],
           )]
       ));
}
Inheritance
Implemented types

Constructors

WidgetPointer({Key? key, double value = 0, bool enableDragging = false, ValueChanged<double>? onValueChanged, ValueChanged<double>? onValueChangeStart, ValueChanged<double>? onValueChangeEnd, ValueChanged<ValueChangingArgs>? onValueChanging, AnimationType animationType = AnimationType.ease, bool enableAnimation = false, double animationDuration = 1000, GaugeSizeUnit offsetUnit = GaugeSizeUnit.logicalPixel, double offset = 0, required Widget child})
Create a widget pointer with the default or required properties. [...]
const

Properties

animationDuration double
Specifies the duration of the pointer animation. [...]
final
animationType AnimationType
Specifies the different type of animation for pointer. [...]
final
child Widget
A widget, which is to be used as the pointer. [...]
final
enableAnimation bool
Whether to enable the pointer animation. [...]
final
enableDragging bool
Whether to allow the pointer dragging. [...]
final
hashCode int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree. [...]
final, inherited
offset double
Adjusts the widget pointer position. [...]
final
offsetUnit GaugeSizeUnit
Calculates the pointer position either in logical pixel or radius factor. [...]
final
onValueChanged ValueChanged<double>?
Called during a drag when the user is selecting a new value for the pointer by dragging. [...]
final
onValueChangeEnd ValueChanged<double>?
Called when the user is done selecting a new value of the pointer by dragging. [...]
final
onValueChangeStart ValueChanged<double>?
Called when the user starts selecting a new value of pointer by dragging. [...]
final
onValueChanging ValueChanged<ValueChangingArgs>?
Called during a drag when the user is selecting before a new value for the pointer by dragging. [...]
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
value double
Specifies the value to the pointer. [...]
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 RenderWidgetPointer 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