CartesianChartAnnotation class

This class has the properties of cartesian chart annotation.

Chart supports annotations that allow you to mark the specific area of interest in the chart area. You can add the custom widgets using this annotation feature as depicted below.

The x and y values can be specified with axis units or pixel units, and these can be identified by using coordinateUnit property. When the logical pixel is specified, the annotation will be placed to pixel values whereas the point is specified, then the annotation will be placed to series point values.

Provides the options x, y, coordinateUnit, and widget to customize the cartesian chart annotation.

Annotations

• @immutable

Constructors

CartesianChartAnnotation({required Widget widget, required dynamic x, required dynamic y, CoordinateUnit coordinateUnit = CoordinateUnit.logicalPixel, String? xAxisName, String? yAxisName, AnnotationRegion region = AnnotationRegion.chart, ChartClipBehavior clip = ChartClipBehavior.clip, ChartAlignment horizontalAlignment = ChartAlignment.center, ChartAlignment verticalAlignment = ChartAlignment.center})

Creating an argument constructor of CartesianChartAnnotation class.

const

Properties

clip → ChartClipBehavior

Clip or hide the annotation when it exceeds the chart area or plot area based on region provided.

final

coordinateUnit → CoordinateUnit

Specifies the coordinate units for placing the annotation in either logicalPixel or point.

final

hashCode → int

The hash code for this object.

no setter, override

horizontalAlignment → ChartAlignment

Aligns the annotations horizontally.

final

region → AnnotationRegion

Annotations can be placed with respect to either plotArea or chart.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

verticalAlignment → ChartAlignment

Aligns the annotations vertically.

final

widget → Widget

Considers any widget as annotation.

final

x → dynamic

Specifies the x-values as pixel, point or percentage values based on the coordinateUnit.

final

xAxisName → String?

Specifies the x-axis name to the annotation that should be bound.

final

y → dynamic

Specifies the y-values as pixel, point or percentage values based on the coordinateUnit.

final

yAxisName → String?

Specifies the y-axis name to the annotation that should be bound.

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.

override