Hello,

I've been using Telerik Silverlight controls in our product, and am very interested in the new ChartView control. However, I would like to make sure that what I'm trying to do will be possible with the new control. I'll describe below how the functionality is currently implemented - can you please let me know whether/how this would be done with chart view. An example with the chartview would be even more appreciated.

I have a graph where I would like to display multiple values. I'll use a weather analogy - let's say I would like to be able to display temperature trends. So for each date, I would like to display three values:
1) historical average low
2) historical average high
3) average temperature for that day for the current year
4) I would also like to display a "baseline" comparison value, a horizontal line across the whole graph.
 
The candlestick seemed ideal for the first 3 values, except that it doesn't work since (3) could actually be above/below the range defined by (1) and (2). So I was using a candlestick to show (1) and (2) (I believe rangebar is another option?), and then a separate scatterseries to show (3). (4) is done with a ChartArea Annotation.

My concerns:
1) trackballInfo - I would like to be able to display all 3 values in the trackball popup. However, I haven't figured out from the samples how to do that - it seems to only display the values for a single series, and with my approach I'm using two separate series for this data.
2) I can get a candlestick to show up properly in a sample chartview, however the scatterseries doesn't seem to work. I saw something on the forums about Scatterseries not designed for categorical information - is a date considered categorical?

Finally - your roadmap says the release version of this functionality is coming in February - any update on *when* in February?

Thank you.

Maria

Hi,

Going straight to your questions:

1) You can display more than one series information inside a trackball info. Please, refer to this example to see how this is implemented: http://demos.telerik.com/silverlight/#ChartView/Financial

2) Yes, datetime is currently implemented as categorical. Have you considered/tried retemplating the candlestick template to include the needed marker?

The release is scheduled for the week of February 15th.

Kind regards,
Vladimir Milev
the Telerik team

Hello Telerik,

I need some information on the trackballinfo feature of the ChartView.

I have multiple series in my ChartView but one of them has no value for all the category in the ChartView.

Is there a way for the TrackBallInfo not to display the last known value instead of showing it as I am scrolling on the ChartView?

I am not sure to be clear enough so I've attached a file showing the behavior.

Hello Sébastien,

Indeed the behavior you are observing is odd. I have logged it in our PITS system and notified our developers. You can track this issue here.

Unfortunately the values for the trackball are set in code behind after the closest data points are discovered, so there is little you can do to influence this behavior from your code.

All the best,
Yavor
the Telerik team