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V25.1
  • CustomizeSankeyToolTipEventArgs.Content Property

    Specifies the tooltip’s content.

    Namespace: DevExpress.XtraCharts.Sankey

    Assembly: DevExpress.XtraCharts.v25.1.dll

    NuGet Package: DevExpress.Charts

    #Declaration

    public string Content { get; set; }

    #Property Value

    Type Description
    String

    A string that specifies the tooltip’s content.

    #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.

    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}";
    }
    
    See Also