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Trackball issue
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Pirjo
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Pirjo asked on 12 Jun 2013, 07:35 AM
Hi,

I have a strange problem with trackballs. It happens when the chartview has multiple y-axis and multiple types of series (e.g. line series and bar series). The problem is that the trackball shows only for one or two categories starting from the left. I have attached a picture, in which there is a chartview with four categories, three series and two y-axis. In this case the trackball shows for the first two categories only. When I move the mouse over the third or fourth category, no trackball appears.

This problem seems to have something to do with two things:
1.) the order the different serie types are added to the chartview
2.) incomplete series

 In my case the problem happens when the bar series is added first to the chartview and then the line series, and the series are incomplete. However, it doesn't happen for all cases having these two conditions, so there must be some third factor affecting to this.

I'm populating the chartview dynamically from datatable. The trackball is added to the chartview like following:

     Dim Trackball As New ChartTrackballController()
     AddHandler Trackball.TextNeeded, AddressOf trackball_textNeeded
     Trackball.InfoElementOffset = New System.Drawing.Point(0, -20)
     rChartView.Controllers.Add(Trackball)

The formatting for the trackball texts is done in trackball_textNeeded  event handler.

I'm using Telerik Q1/2013

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Pirjo
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answered on 13 Jun 2013, 07:09 AM
Hi again,

Today I managed to reproduce the trackball problem also for a chartview with complete series, i.e. it seems that condition 2 in my previous post does not have to be filled.

Regards,
Pirjo
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Peter
Telerik team
answered on 17 Jun 2013, 07:11 AM
Hello Pirjo,

Thank you for writing.

The trackball functionality does not support multiple axes and the presence of multiple axes breaks the trackball logic. I logged this in our Public Issue Tracking System. You can add your vote for it and subscribe for status change notifications here: http://www.telerik.com/support/pits.aspx#/public/winforms/15187.

Due to the internal logic of the trackball functionality I am not able to provide a suitable workaround for this.

Your Telerik points have been updated for your feedback.

Regards,
Peter
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Larry
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answered on 29 Sep 2014, 09:53 PM
I have the exact same problem with multiple axis.
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Dimitar
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answered on 30 Sep 2014, 01:33 PM
Hello Larry,

Thank you for writing.

This functionality is still not implemented. The item is now transferred to our Feedback Portal. You can track it for status changes and add your vote for it here.

I hope this information helps.

Regards,
Dimitar
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Steve
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answered on 17 Mar 2016, 06:09 PM
I would like this functionality as well.
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Dimitar
Telerik team
answered on 21 Mar 2016, 08:50 AM
Hello Steve,

Thank you for writing.

The item is now completed and this should work without problems. 
 
Let me know if you have additional questions.
 
Regards,
Dimitar
Telerik
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Pirjo
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Peter
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