Wrong behavior of points on LineSeries.

3 posts, 0 answers
  1. Paul
    Paul avatar
    3 posts
    Member since:
    Nov 2014

    Posted 03 Feb 2015 Link to this post

    Hi,

    in our production app my team noticed strange behavior of RadChart control. Points on LineSeries wasn't on their place after zooming. First we thought, that was problem with our XAML styles or data provided via ObservableCollection, but everything was ok. Then we try to reproduce the bug on clean new WPF project and we did it. When you have more then one LineSeries (when you have one that bug exists too, but hard to notice, becouse only few or exacly one point can have wrong position) on your Chart and try to zoom, then points change their position to wrong, like not rerendering at all. I attached screenshot and solution that reproducing this bug. Can you try yourself and confirm that is a bug in your RadChart control?

    There's solution: http://www27.zippyshare.com/v/oJX0ymTg/file.html

    Greetings,
    Paul.
  2. Petar Marchev
    Admin
    Petar Marchev avatar
    968 posts

    Posted 06 Feb 2015 Link to this post

    Hi Paul,

    Thank you for the attached project and explanations. I was able to quickly reproduce the faulty behavior. It appears that you do not have to zoom in to get this glitch, you can resize the chart and when the axes change their step and range, the second series seems not to get notified and it uses the old axis range to render.

    The RadChart is the old charting solution and we have not made any changes to the code in the last three years. Our efforts are focused on the new ChartView which has a much better overall performance, it is very flexible and easy to set up. I suggest you completely remove the Charting.dll reference and switch to the new chart.

    qsf examples
    online documentation
    sdk samples

    Regards,
    Petar Marchev
    Telerik
     

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  4. Paul
    Paul avatar
    3 posts
    Member since:
    Nov 2014

    Posted 09 Feb 2015 Link to this post

    Thanks for confirmation that is a faulty behavior. 

    Regards,
    Paul.
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