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SchedulerControl.CustomDrawDependency Event

Enables dependencies to be painted manually.

Namespace: DevExpress.XtraScheduler

Assembly: DevExpress.XtraScheduler.v22.2.dll

NuGet Package: DevExpress.Win.Scheduler


public event CustomDrawObjectEventHandler CustomDrawDependency

Event Data

The CustomDrawDependency event's data class is CustomDrawObjectEventArgs. The following properties provide information specific to this event:

Property Description
Bounds Returns the bounding rectangle of the drawing area.
Cache Gets an object which specifies the storage for the pens, fonts and brushes. Use it for custom painting in Scheduler Reports.
Graphics Gets an object used for painting.
Handled Gets or sets whether an event was handled. If it was handled, the default actions are not required.
ObjectInfo Gets information on the painted element.

The event data class exposes the following methods:

Method Description
DrawDefault() Renders the element using the default drawing mechanism.
DrawHtml(HtmlTemplate, DxHtmlPainterContext, Action<DxHtmlPainterArgs>) Paints the required HTML template inside an element that raised this event. The context parameter allows you to assign an object that transfers mouse events to template elements.
DrawHtml(HtmlTemplate, Action<DxHtmlPainterArgs>) Paints the required HTML template inside an element that raised this event.


The CustomDrawDependency event is raised before a Dependency is painted. The event parameter’s CustomDrawObjectEventArgs.ObjectInfo property provides all the information necessary to paint a dependency. The return value of this property should be typecast to the DependencyViewInfo type.

Set the CustomDrawObjectEventArgs.Handled property to true to prohibit default appointment painting.

The following code snippet draws a red dashed line to indicate appointment dependencies other than AppointmentDependencyType.FinishToStart type in the Gantt View. Default dependency painting is cancelled by setting the CustomDrawObjectEventArgs.Handled to true.

private void schedulerControl1_CustomDrawDependency(object sender, CustomDrawObjectEventArgs e)
    DependencyViewInfo dvi = (DependencyViewInfo)e.ObjectInfo;
    if (dvi.Dependencies[0].Type != AppointmentDependencyType.FinishToStart) {
        Pen myPen = e.Cache.GetPen(Color.Red);
        myPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;
        dvi.Graphics.DrawLine(myPen, dvi.Start, dvi.End);
        e.Handled = true;
See Also