How to determine what group was clicked inside

Updated on Mar 17, 2026

Environment

Product

RadTimeline for WPF

Description

How to determine which timeline group was clicked.

Solution

Handle the MouseRightButtonDown/MouseLeftButtonDown event of the RadTimeLine and check, if the clicked element is a TimelineItemGroupControl.

Example 1: Checking the clicked element

C#

	private void RadTimeline_MouseRightButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
    {
        var panel = e.OriginalSource as VirtualizingTimelinePanel;
        if (panel != null)
        {
            var groupControl = panel.ParentOfType<TimelineItemGroupControl>();
            if (groupControl != null)
            {
                var context =  (TimelineDataItemGroup)groupControl.DataContext;
            }
        }
    }

VB.NET

	Private Sub RadTimeline_MouseRightButtonDown(ByVal sender As Object, ByVal e As System.Windows.Input.MouseButtonEventArgs)
		Dim panel = TryCast(e.OriginalSource, VirtualizingTimelinePanel)
		If panel IsNot Nothing Then
			Dim groupControl = panel.ParentOfType(Of TimelineItemGroupControl)()
			If groupControl IsNot Nothing Then
				Dim context = CType(groupControl.DataContext, TimelineDataItemGroup)
			End If
		End If
    End Sub

See Also

• Grouping