Thank you for the quick reply.

My issue is not with rendering the tooltip, it's with determining the information about the overlapped DataItems whenever I hover over a point.

For example, if I have two bubbles at the same point, at the same size on a populated 2D Bubble Chart, and I hover over the point, I only get information for the top-most DataItem. I need a way to determine which bubbles are at that point, and access them as a "collection" of bubbles, rather than just displaying whichever one ends up on top

Hello,

I am glad to hear that my sample helps you.

Please do not hesitate to contact with us if you have any further questions on this matter.

Hristo,

Sorry for the confusion. I originally couldn't get your sample to run, but did some digging this morning and get things working.

I think the example you've given is enough to get close to what I need.

Thanks for the help!

Melissa

Hello ,

Have you run my sample ?  Does it display tooltip with list of a bubbles which overlaps for the current position of the mouse ? in the implementation of IRenderLable interface I had put code which returns list of ellipse primitives which contains the current mouse position:

private void PopulateValues()

        {

            var Core = ultraChart1.GetType().GetProperty("ChartCore", BindingFlags.CreateInstance | BindingFlags.GetField | BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Static);

            var CoreValue = Core.GetValue(ultraChart1, null);

            SceneGraph scene = (SceneGraph)CoreValue.GetType().GetProperty("SceneGraph").GetValue(CoreValue, null);

            Point mouseLocation = Cursor.Position;

            mouseLocation = ultraChart1.PointToClient(mouseLocation);

            List<Primitive> elipses = scene.Cast<Primitive>().Where(p => p is Ellipse && ((Ellipse)p).HitTest(mouseLocation)).ToList<Primitive>();

            MyLabelRenderer.values.Clear();

            foreach(var p in elipses)

                 MyLabelRenderer.values.Add (p.Value);

        }

Isn’t this what you are looking for ?

I am waiting for your feedback.