Class ChartTrendline

Represents the base abstract class for all trendline types in the chart.

Inheritance

System.Object

ChartTrendline

ExponentialTrendline

LinearTrendline

LogarithmicTrendline

MovingAverageTrendline

PolynomialTrendline

PowerTrendline

Namespace: Syncfusion.Maui.Charts

Assembly: Syncfusion.Maui.Charts.dll

Syntax

public abstract class ChartTrendline : BindableObject, ITooltipDependent, IMarkerDependent, ICartesianLegendDependent

Constructors

ChartTrendline()

Initializes a new instance of the ChartTrendline class.

Declaration

public ChartTrendline()

Fields

BackwardForecastProperty

Identifies the BackwardForecast bindable property.

Declaration

public static readonly BindableProperty BackwardForecastProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

EnableTooltipProperty

Identifies the EnableTooltip bindable property.

Declaration

public static readonly BindableProperty EnableTooltipProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

ForwardForecastProperty

Identifies the ForwardForecast bindable property.

Declaration

public static readonly BindableProperty ForwardForecastProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

IsVisibleProperty

Identifies the IsVisible bindable property.

Declaration

public static readonly BindableProperty IsVisibleProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

LabelProperty

Identifies the Label bindable property.

Declaration

public static readonly BindableProperty LabelProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

MarkerSettingsProperty

Identifies the MarkerSettings bindable property.

Declaration

public static readonly BindableProperty MarkerSettingsProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

OpacityProperty

Identifies the Opacity bindable property.

Declaration

public static readonly BindableProperty OpacityProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

ShowMarkersProperty

Identifies the ShowMarkers bindable property.

Declaration

public static readonly BindableProperty ShowMarkersProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

ShowTrackballLabelProperty

Identifies the ShowTrackballLabel bindable property.

Declaration

public static readonly BindableProperty ShowTrackballLabelProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

StrokeDashArrayProperty

Identifies the StrokeDashArray bindable property.

Declaration

public static readonly BindableProperty StrokeDashArrayProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

StrokeProperty

Identifies the Stroke bindable property.

Declaration

public static readonly BindableProperty StrokeProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

StrokeWidthProperty

Identifies the StrokeWidth bindable property.

Declaration

public static readonly BindableProperty StrokeWidthProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

TooltipTemplateProperty

Identifies the TooltipTemplate bindable property.

Declaration

public static readonly BindableProperty TooltipTemplateProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

TrackballLabelTemplateProperty

Identifies the TrackballLabelTemplate bindable property.

Declaration

public static readonly BindableProperty TrackballLabelTemplateProperty

Field Value

Type
Microsoft.Maui.Controls.BindableProperty

Properties

BackwardForecast

Gets or sets the number of periods to forecast backward.

Declaration

public int BackwardForecast { get; set; }

Property Value

Type	Description
System.Int32	The default value is 0.

EnableTooltip

Gets or sets a value indicating whether the tooltip for trendline should be shown or hidden.

Declaration

public bool EnableTooltip { get; set; }

Property Value

Type	Description
System.Boolean	It accepts bool values and its default value is False.

Remarks

The trendline tooltip will appear when you click or tap the trendline area.

ForwardForecast

Gets or sets the number of periods to forecast forward.

Declaration

public int ForwardForecast { get; set; }

Property Value

Type	Description
System.Int32	The default value is 0.

IsVisible

Gets or sets a value indicating whether the trendline is visible.

Declaration

public bool IsVisible { get; set; }

Property Value

Type	Description
System.Boolean	The default value is true.

Label

Gets or sets the label for the trendline.

Declaration

public string Label { get; set; }

Property Value

Type	Description
System.String	The default value is null.

MarkerSettings

Gets or sets the marker settings to customize the appearance of trendline markers.

Declaration

public ChartMarkerSettings MarkerSettings { get; set; }

Property Value

Type	Description
ChartMarkerSettings	It accepts a ChartMarkerSettings instance. If null, default marker settings will be used.

Remarks

This property allows customization of marker appearance including type, size, fill, stroke, and stroke width.

Markers are only displayed when ShowMarkers is set to true.

The marker settings follow the same pattern as series markers, supporting all standard marker shapes and styles.

Examples

<chart:LinearTrendline ShowMarkers="True">
    <chart:LinearTrendline.MarkerSettings>
        <chart:ChartMarkerSettings Type="Diamond" Fill="Blue" Stroke="DarkBlue" StrokeWidth="2" Width="10" Height="10" />
    </chart:LinearTrendline.MarkerSettings>
</chart:LinearTrendline>

Opacity

Gets or sets the opacity of the trendline.

Declaration

public double Opacity { get; set; }

Property Value

Type	Description
System.Double	The default value is 1.0.

ShowMarkers

Gets or sets a value indicating whether to show markers for the trendline data points.

Declaration

public bool ShowMarkers { get; set; }

Property Value

Type	Description
System.Boolean	The default value is false.

Remarks

When enabled, markers will be displayed at calculated trendline points to highlight key positions along the trendline.

The marker appearance can be customized using the MarkerSettings property.

Markers support tooltip interaction when EnableTooltip is also enabled.

Examples

<chart:LinearTrendline ShowMarkers="True">
    <chart:LinearTrendline.MarkerSettings>
        <chart:ChartMarkerSettings Type="Circle" Fill="Red" Width="8" Height="8" />
    </chart:LinearTrendline.MarkerSettings>
</chart:LinearTrendline>

ShowTrackballLabel

Gets or sets a value indicating whether to show trackball label for the trendline.

Declaration

public bool ShowTrackballLabel { get; set; }

Property Value

Type	Description
System.Boolean	It accepts bool values and its default value is False.

Remarks

The trendline trackball label will appear when trackball is activated and intersects with the trendline.

Stroke

Gets or sets the brush used to paint the trendline.

Declaration

public Brush Stroke { get; set; }

Property Value

Type	Description
Microsoft.Maui.Controls.Brush	The default value is null.

StrokeDashArray

Gets or sets the stroke dash pattern for the trendline.

Declaration

public DoubleCollection StrokeDashArray { get; set; }

Property Value

Type	Description
Microsoft.Maui.Controls.DoubleCollection	The default value is null.

StrokeWidth

Gets or sets the width of the trendline stroke.

Declaration

public double StrokeWidth { get; set; }

Property Value

Type	Description
System.Double	The default value is 2.0.

TooltipTemplate

Gets or sets the DataTemplate that can be used to customize the appearance of the trendline tooltip.

Declaration

public DataTemplate TooltipTemplate { get; set; }

Property Value

Type	Description
Microsoft.Maui.Controls.DataTemplate	It accepts a Microsoft.Maui.Controls.DataTemplate value.

TrackballLabelTemplate

Gets or sets the DataTemplate that can be used to customize the appearance of the trendline trackball label.

Declaration

public DataTemplate TrackballLabelTemplate { get; set; }

Property Value

Type	Description
Microsoft.Maui.Controls.DataTemplate	It accepts a Microsoft.Maui.Controls.DataTemplate value.

Methods

OnBindingContextChanged()

Called when the binding context changes.

Declaration

protected override void OnBindingContextChanged()