Class HorizontalLineAnnotation

This class is used to add a horizontal line annotation to the SfCartesianChart. An instance of this class needs to be added to the Annotations collection.

Inheritance
System.Object
ChartAnnotation
ShapeAnnotation
LineAnnotation
HorizontalLineAnnotation
Inherited Members
Namespace: Syncfusion.Maui.Toolkit.Charts
Assembly: Syncfusion.Maui.Toolkit.dll
Syntax
public class HorizontalLineAnnotation : LineAnnotation, IThemeElement
Remarks

HorizontalLineAnnotation is used to draw a horizontal line across the chart area.

Examples
<chart:SfCartesianChart.Annotations>
  <chart:HorizontalLineAnnotation Y1="10" Text="Horizontal" ShowAxisLabel="True">
  </chart:HorizontalLineAnnotation>
</chart:SfCartesianChart.Annotations>

Constructors

HorizontalLineAnnotation()

Initializes a new instance of the HorizontalLineAnnotation.

Declaration
public HorizontalLineAnnotation()

Fields

AxisLabelStyleProperty

Identifies the AxisLabelStyle bindable property.

Declaration
public static readonly BindableProperty AxisLabelStyleProperty
Field Value
Type
Microsoft.Maui.Controls.BindableProperty
Remarks

The AxisLabelStyle property allows customization of the axis label in the HorizontalLineAnnotation.

ShowAxisLabelProperty

Identifies the ShowAxisLabel bindable property.

Declaration
public static readonly BindableProperty ShowAxisLabelProperty
Field Value
Type
Microsoft.Maui.Controls.BindableProperty
Remarks

The ShowAxisLabel property determines whether the axis label is visible for the HorizontalLineAnnotation.

Properties

AxisLabelStyle

Gets or sets the customized style for the annotation axis label.

Declaration
public ChartLabelStyle AxisLabelStyle { get; set; }
Property Value
Type Description
ChartLabelStyle

This property takes the ChartLabelStyle as its value.
Examples
    <chart:SfCartesianChart>

    <!-- ... Eliminated for simplicity-->
    <chart:SfCartesianChart.Annotations>
         <chart:HorizontalLineAnnotation Y1="10" >
          <chart:HorizontalLineAnnotation.AxisLabelStyle>
            <chart:ChartLabelStyle Background="Yellow"/>
          </chart:HorizontalLineAnnotation.AxisLabelStyle>
         </chart:HorizontalLineAnnotation>
    </chart:SfCartesianChart.Annotations>  

    </chart:SfCartesianChart>

ShowAxisLabel

Gets or sets a value indicating whether to enable or disable the display of the annotation label on the axis.

Declaration
public bool ShowAxisLabel { get; set; }
Property Value
Type Description
System.Boolean

This property takes the bool as its value and its default value is false.
Examples
    <chart:SfCartesianChart>

    <!-- ... Eliminated for simplicity-->
    <chart:SfCartesianChart.Annotations>
         <chart:HorizontalLineAnnotation Y1="10" ShowAxisLabel="True"/>
    </chart:SfCartesianChart.Annotations>  

    </chart:SfCartesianChart>

Methods

Draw(ICanvas, RectF)

Draws the annotation of the chart.

Declaration
protected override void Draw(ICanvas canvas, RectF dirtyRect)
Parameters
Type Name Description
Microsoft.Maui.Graphics.ICanvas canvas
Microsoft.Maui.Graphics.RectF dirtyRect
Overrides