CustomDrawCrosshairEventArgs.CrosshairLegendElements Property

Returns crosshair legend elements to customize their appearance.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v20.1.dll

Declaration

public List<CrosshairLegendElement> CrosshairLegendElements { get; }
Public ReadOnly Property CrosshairLegendElements As List(Of CrosshairLegendElement)

Property Value

Type Description
List<CrosshairLegendElement>

A collection of CrosshairLegendElement objects.

Remarks

If the CrosshairOptions.ContentShowMode (or XYSeries2D.CrosshairContentShowMode) property is Legend, use the CrosshairLegendElements property to customize legend elements when custom drawing a crosshair cursor using the ChartControl.CustomDrawCrosshair event.

Refer to the Tooltip and Crosshair Cursor document for more information on the Crosshair Cursor.

Examples

This example demonstrates how to modify the Crosshair Cursor's appearance using the ChartControl.CustomDrawCrosshair event.

In this sample, crosshair content is displayed in a legend. For this, set the CrosshairOptions.ContentShowMode to the Legend value that the CrosshairContentShowMode enumeration contains. Note that you can specify the crosshair's content show mode for the specified series using the XYSeries2D.CrosshairContentShowMode property.

Use the CustomDrawCrosshairEventArgs.CrosshairLegendElements property to obtain the crosshair legend elements' collection.

To customize each crosshair legend element options, use the CrosshairLegendElement class properties.

using System.Windows;
using System.Windows.Media;
using DevExpress.Xpf.Charts;
namespace CustomDrawCrosshair {
    public partial class MainWindow : Window {
        const int ColorSelectorValue = 10;
        public MainWindow() {
            InitializeComponent();
        }
        private void OnCustomDrawCrosshair(object sender, CustomDrawCrosshairEventArgs e) {
            foreach(CrosshairLegendElement legendElement in e.CrosshairLegendElements) {
                legendElement.Foreground = (legendElement.SeriesPoint.Value > ColorSelectorValue) ? Brushes.Green : Brushes.Red;
                legendElement.LineElement.Brush = legendElement.Foreground;
                legendElement.AxisLabelElement.Background = legendElement.Foreground;
            }            
        }
    }
}
See Also