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
Constructors
- CartesianChartAnnotation({Widget? widget, CoordinateUnit coordinateUnit = CoordinateUnit.logicalPixel, AnnotationRegion region = AnnotationRegion.chart, ChartAlignment horizontalAlignment = ChartAlignment.center, ChartAlignment verticalAlignment = ChartAlignment.center, dynamic x = 0, dynamic y = 0, String? xAxisName, String? yAxisName})
-
Creating an argument constructor of CartesianChartAnnotation class.
const
Properties
- 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 setteroverride
- 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 setterinherited
- 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