CustomizeSankeyNodeToolTipEventArgs Class

Data for the CustomizeNodeToolTip event.

Namespace: DevExpress.XtraCharts.Sankey

Assembly: DevExpress.XtraCharts.v20.2.dll

NuGet Packages: DevExpress.Charts, DevExpress.WindowsDesktop.Charts

Declaration

C#

public class CustomizeSankeyNodeToolTipEventArgs :
    CustomizeSankeyToolTipEventArgs

VB.NET

Public Class CustomizeSankeyNodeToolTipEventArgs
    Inherits CustomizeSankeyToolTipEventArgs

Related API Members

CustomizeSankeyNodeToolTipEventArgs is the data class for the following events:

• SankeyDiagramControl.CustomizeNodeToolTip

Remarks

Example

This example formats tooltip content for links and nodes.

Tooltips are shown when the mouse pointer hovers over a node or link. Use the SankeyToolTipOptions.NodeToolTipEnabled, SankeyToolTipOptions.LinkToolTipEnabled and ToolTipController properties to disable/enable tooltips and customize their appearance. To format tooltip text, handle the CustomizeNodeToolTip and CustomizeLinkToolTip events and specify the CustomizeSankeyToolTipEventArgs.Title and CustomizeSankeyToolTipEventArgs.Content properties in event handlers.

The following code formats text used in tooltips. The e.Node.Tag, e.Link.SourceNode.Tag, and e.Link.TargetNode.Tag properties store values that are shown in default tooltip titles. To obtain node and link weights, use the e.Node.TotalWeight and e.Link.TotalWeight properties.

C#

private void Form1_Load(object sender, EventArgs e) {
    sankeyDiagramControl1.ToolTipOptions.LinkToolTipEnabled = DevExpress.Utils.DefaultBoolean.True;
    sankeyDiagramControl1.ToolTipOptions.NodeToolTipEnabled = DevExpress.Utils.DefaultBoolean.True;
    sankeyDiagramControl1.ToolTipController = new DevExpress.Utils.ToolTipController { 
        ToolTipType = DevExpress.Utils.ToolTipType.Flyout, 
        AllowHtmlText = true 
    };
    sankeyDiagramControl1.CustomizeNodeToolTip += OnCustomizeNodeToolTip;
    sankeyDiagramControl1.CustomizeLinkToolTip += OnCustomizeLinkToolTip;
}
private void OnCustomizeNodeToolTip(object sender, CustomizeSankeyNodeToolTipEventArgs e) {
    e.Title = $"Country: <u>{e.Node.Tag}</u>";
    e.Content = $"{e.Node.TotalWeight:f1}";
}

private void OnCustomizeLinkToolTip(object sender, CustomizeSankeyLinkToolTipEventArgs e) {
    e.Title = $"{e.Link.SourceNode.Tag} → {e.Link.TargetNode.Tag}";
    e.Content = $"{e.Link.TotalWeight}";
}

VB.NET

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
    sankeyDiagramControl1.ToolTipOptions.LinkToolTipEnabled = DevExpress.Utils.DefaultBoolean.[True]
    sankeyDiagramControl1.ToolTipOptions.NodeToolTipEnabled = DevExpress.Utils.DefaultBoolean.[True]
    sankeyDiagramControl1.ToolTipController = New DevExpress.Utils.ToolTipController With {
        .ToolTipType = DevExpress.Utils.ToolTipType.Flyout,
        .AllowHtmlText = True
    }
    sankeyDiagramControl1.CustomizeNodeToolTip += AddressOf OnCustomizeNodeToolTip
    sankeyDiagramControl1.CustomizeLinkToolTip += AddressOf OnCustomizeLinkToolTip
End Sub

Private Sub OnCustomizeNodeToolTip(ByVal sender As Object, ByVal e As CustomizeSankeyNodeToolTipEventArgs)
    e.Title = $"Country: <u>{e.Node.Tag}</u>"
    e.Content = $"{e.Node.TotalWeight:f1}"
End Sub

Private Sub OnCustomizeLinkToolTip(ByVal sender As Object, ByVal e As CustomizeSankeyLinkToolTipEventArgs)
    e.Title = $"{e.Link.SourceNode.Tag} → {e.Link.TargetNode.Tag}"
    e.Content = $"{e.Link.TotalWeight}"
End Sub

Inheritance

Object

CustomizeSankeyToolTipEventArgs

CustomizeSankeyNodeToolTipEventArgs