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ToolTip not working in RadChart when ScrollMode.ZoomAndScroll is set

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answered on 10 Mar 2010, 09:19 AM

Hi Uma Shanmugam,

Because of the way zooming and data sampling work, the data context used for showing the tooltips is not persisted. While technically tooltips cannot be directly exposed for sampled (summarized) data this doesn't mean we will not allow tooltips when zooming and scrolling is enabled - simply it will take some time as it is a separate feature.

Sincerely yours,
Vladimir Milev
the Telerik team

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answered on 16 Nov 2011, 08:34 AM

Hello Fabio Laserra,

This feature was implemented and is available with the current release of RadChart. When grouping or sampling data, as in your case, we are generating an auxiliary datacontext for each datapoint. It can be accessed through datapoint.dataitem property. It constainst a list of string/string key/value pairs. For each group descriptor you create the key value pair will indicate the name of the property by which grouping is performed and the actual group key for the item in question. This is all the information that makes sense to be exposed when grouping/sampling data. Hope this helps.

Best wishes,
Vladimir Milev
the Telerik team

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