How to customize the trackball appearance in WPF Chart?

This article explains how to modify the default appearance of the Trackball in WPF Chart. By default, the Trackball displays the Y-axis value, but this guide will demonstrate how to display the Trackball content with the corresponding X-axis value. This can be achieved using the TrackBallLabelTemplate in the WPF Chart Series, as shown in the following code snippet:

<syncfusion:SfChart>
      <syncfusion:SfChart.Resources>
            <DataTemplate x:Key="labelTemplate">
                 <Border CornerRadius="2" Background="Violet">
                     <TextBlock Foreground="White" 
                                Margin="5" 
                                Text="{Binding Item.Name}"/>
                 </Border>
            </DataTemplate>
      </syncfusion:SfChart.Resources>  
          ..
      <syncfusion:ColumnSeries ItemsSource="{Binding Data}" 
                               XBindingPath="Name"
                               ShowTrackballInfo="True"
                               TrackBallLabelTemplate="{StaticResource labelTemplate}"
                               YBindingPath="Height">
      </syncfusion:ColumnSeries>
 
      <syncfusion:SfChart.Behaviors>
           <syncfusion:ChartTrackBallBehavior/>
      </syncfusion:SfChart.Behaviors>
</syncfusion:SfChart>

Screenshot:

The following screenshot displays a chart with customized Trackball content.

Conclusion

I hope you enjoyed learning how to customize the trackball appearance in WPF Chart.

You can refer to our WPF Chart feature tour page know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our WPF Chart Examples to understand how to create and manipulate data.

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