images lazy-loading

10 posts, 0 answers
  1. Gladys
    Gladys avatar
    10 posts
    Member since:
    Jul 2009

    Posted 10 Dec 2009 Link to this post

    Hi there, we are trying to load about 300 images into coverflow. Does the coverflow do images lazy-loading? Any options to configure to speed up the image loading performance?

    Thanks,
    -Gladys
  2. Hristo Borisov
    Admin
    Hristo Borisov avatar
    298 posts

    Posted 14 Dec 2009 Link to this post

    Hello Gladys,

    Unfortunately there is no lazy-loading option for the current version of RadCoverFlow. We plan to include UI virtualization in one of our next releases, but I cannot promise you an exact date. To optimize the current performance you can turn off both the loading animation and the reflection that are rendered for every item. I hope this will partially resolve your problems.

    Excuse us for this inconvenience, and I hope this will not be a show stopper for you.

    Regards,
    Hristo Borisov
    the Telerik team

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  4. Gladys
    Gladys avatar
    10 posts
    Member since:
    Jul 2009

    Posted 14 Dec 2009 Link to this post

    Thanks for the response. I think this feature will be very useful to improve the performance for coverflow. Hopefully it can be released as early as possible.

    Thanks,
    -Gladys
  5. Valeri Hristov
    Admin
    Valeri Hristov avatar
    2252 posts

    Posted 15 Dec 2009 Link to this post

    Hi Gladys,

    We understand that this feature is important and we will do our best to provide it in the near future, however, I cannot promise a specific release date at this moment.

    Greetings,
    Valeri Hristov
    the Telerik team

    Instantly find answers to your questions on the new Telerik Support Portal.
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  6. Oscar
    Oscar avatar
    25 posts
    Member since:
    Aug 2012

    Posted 18 Apr 2011 Link to this post

    I know the Telerik team has done great improvements on the controls, especially when data Optimization has been an issue.

    On Version 2011 Q1  , if we have 300 images can we tell the cover flow just to load just one specific one and not all of them (image) , in other words Lazy Loading the images ?,

    This will  increase the performance of Cover Flow tremendously !
    Because if I have 50 images for example, it seems as if the coverflows needs to Know the existence of all 50 (load them all) to work moving  them.. so If I click on Image #2 and then scrolls to image 50 to expand it, or show more info about it. it seems as if the coverflows needs to process all images from # 2 to # 50, why not just jump from 2 to 50 and ignore the ones in between......

    If not possible with XAML how can we do it in Code ?

    Regards
  7. lynn
    lynn avatar
    4 posts
    Member since:
    Mar 2011

    Posted 18 Apr 2011 Link to this post

    Hi Oscar,

    You can do this in code by Add'ing and Remove'ing items from the ObservableCollection that you set as your Itemssource i.e. separate the list of choices that you present to users from the list of items associated with your CoverFlow.
  8. Oscar
    Oscar avatar
    25 posts
    Member since:
    Aug 2012

    Posted 19 Apr 2011 Link to this post

    @lynn.. Thank you
    have you seen the effect when you have 50 images or maybe more.. I mean Lazy and intelligent loading

    Telerik Team:
    Quote
    " We understand that this feature is important and we will do our best to provide it in the near future, however, I cannot promise a specific release date at this moment."

    Greetings,
    Valeri Hristov
    the Telerik team


    is it possible now with your latest version ?
    :)
  9. Valeri Hristov
    Admin
    Valeri Hristov avatar
    2252 posts

    Posted 20 Apr 2011 Link to this post

    RadCoverFlow now supports UI virtualization that should be of help in such scenarios.

    Greetings,
    Valeri Hristov
    the Telerik team
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  10. Thomas Weidman
    Thomas Weidman avatar
    12 posts
    Member since:
    Apr 2004

    Posted 17 Aug 2011 Link to this post

    Hello-

    With support for  UI virtualization, is there a limit to the number of images you could bind to the coverflow ojbect?   Also I do not see  UI virtualization listed in the feature set for Coverflow, I do see it in ohter controls that Grid.

    I'm looking into the feasibility of using Coverflow for ~500 images.

    Thanks,

    -Thomas
  11. Valeri Hristov
    Admin
    Valeri Hristov avatar
    2252 posts

    Posted 22 Aug 2011 Link to this post

    Hi Thomas,

    There should be no problem to display 500+ images in RadCoverFlow.

    All the best,
    Valeri Hristov
    the Telerik team

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