HintStyle.ValueLineStyle Property

Gets or sets the options that configure the value line appearance for the crosshair hint.

Namespace: DevExpress.XamarinForms.Charts

Assembly: DevExpress.XamarinForms.Charts.dll

NuGet Package: DevExpress.XamarinForms.Charts

Declaration

public CrosshairLineStyle ValueLineStyle { get; set; }

Property Value

Type	Description
CrosshairLineStyle	An object that stores the value line appearance settings.

Remarks

Tooltips are the default display of the ChartView hints. To customize tooltips, refer to the TooltipHintBehavior class.

To set the chart hints to crosshair cursor behavior, set the Hint.Behavior property to the CrosshairHintBehavior object.

A crosshair cursor is a pair of intersecting horizontal and vertical lines (value line and argument line) with the corresponding axis labels at the end of these lines. You can use the corresponding properties of the CrosshairHintBehavior object to show or hide these lines and their labels, and the hint style ArgumentLineStyle and ValueLineStyle properties to customize their appearance.

XAML

<dxc:ChartView>    
    <dxc:ChartView.Hint>
        <dxc:Hint Enabled="True">
            <!--...-->
            <dxc:Hint.Behavior>
                <dxc:CrosshairHintBehavior 
                            GroupHeaderTextPattern="{} Year: {A$YYYY}"
                            ArgumentLineVisible="False"
                            ArgumentLabelVisible="False"
                            MaxSeriesCount="3" />
            </dxc:Hint.Behavior>
        </dxc:Hint>
    </dxc:ChartView.Hint>
</dxc:ChartView> 

Example

This example demonstrates how to set the ChartView hint behavior to crosshair, and how to specify the crosshair hint properties.

1. Set the ChartView.Hint property to the Hint object, with the Enabled property set to True.
2. Assign the CrosshairHintBehavior object to the Hint.Behavior property. Specify the GroupHeaderTextPattern and MaxSeriesCount properties to manage the crosshair cursor label content.
3. Create a new HintStyle object and assign it to the Hint.Style property to customize the hint appearance. Assign the CrosshairLineStyle class instance with specified LabelBackgroundColor, Stroke, and TextStyle properties to the HintStyle.ArgumentLineStyle and HintStyle.ValueLineStyle properties to modify appearance of the hint lines and hint labels.

XAML

<dxc:ChartView.Hint>
    <dxc:Hint Enabled="True">
        <!--...-->
        <dxc:Hint.Behavior>
            <dxc:CrosshairHintBehavior
                    GroupHeaderTextPattern="{} Year: {A$YYYY}"
                    MaxSeriesCount="3" />
        </dxc:Hint.Behavior>
        <dxc:Hint.Style>
            <dxc:HintStyle>
                <dxc:HintStyle.ArgumentLineStyle>
                    <dxc:CrosshairLineStyle LabelBackgroundColor="#383c44"
                                            Stroke="Blue">
                        <dxc:CrosshairLineStyle.TextStyle>
                            <dxc:TextStyle Color="White"
                                           Size="30"/>
                        </dxc:CrosshairLineStyle.TextStyle>
                    </dxc:CrosshairLineStyle>
                </dxc:HintStyle.ArgumentLineStyle>
                <dxc:HintStyle.ValueLineStyle>
                    <dxc:CrosshairLineStyle LabelBackgroundColor="#383c44"
                                            Stroke="Red">
                        <dxc:CrosshairLineStyle.TextStyle>
                            <dxc:TextStyle Color="White"
                                           Size="30"/>
                        </dxc:CrosshairLineStyle.TextStyle>
                    </dxc:CrosshairLineStyle>
                </dxc:HintStyle.ValueLineStyle>
            </dxc:HintStyle>
        </dxc:Hint.Style>
    </dxc:Hint>
</dxc:ChartView.Hint>