Excessive map redrawing.

4 posts, 0 answers
  1. Clint Singer
    Clint Singer avatar
    133 posts
    Member since:
    Oct 2012

    Posted 11 Jan 2010 Link to this post

    Hi,

    After enabling redraw regions I noticed that the the map control is excessively redrawing.  I set up a project with nothing but the map in it to ensure that it wasn't something that I was doing.  Even when nothing is happening on the map it is being invalidated multiple times a second.  I have a collegue that uses a fairly low powered laptop and IE uses a significant amount of her CPU when the map is visible.

    Of course on my i7 I didn't notice it :)  Except when the visualizations are enabled; because that amount of flickering would cause seizures.

    I would have expected that it would only invalidate if there were items on it that were actually changing.

    Cheers,
    Clint
  2. Andrey
    Admin
    Andrey avatar
    1681 posts

    Posted 13 Jan 2010 Link to this post

    Hi Clint,

    Thank you for the feedback. That would be a major issue, but I am afraid we cannot reproduce it. Can you send to us your test project for detail research into the problem? Thanks.

    All the best,
    Andrey Murzov
    the Telerik team


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  3. Clint Singer
    Clint Singer avatar
    133 posts
    Member since:
    Oct 2012

    Posted 13 Jan 2010 Link to this post

    Hi,

    I am trying to get a sample that repros the problem. I just updated to Internal build 1219 which may have improved the situation in a naked application with only a map in it.  It could be also that I didn't wait long enough for the map to stop refreshing as I noticed that it continues to flash even when there doesn't appear to be anything happening but if it is left for a number of seconds the flashing subsides.

    Although this situation isn't true with my companys application.  I eliminated everywhere where there would be invalidate calls to ensure that map isn't be invalidated by the application.  It still stays flickering.  Perhaps I have to wait an exceptionally long time for some reason.

    I will spend some more time trying to figure out what may be triggering the excessive redrawing.

    Cheers,
    Clint
  4. Clint Singer
    Clint Singer avatar
    133 posts
    Member since:
    Oct 2012

    Posted 05 Feb 2010 Link to this post

    It turns out that the problem was with a bug in DeepZoom.

    http://support.microsoft.com/kb/979202

    Cheers,
    Clint
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