How to store scroller position when use ajax.reload()

How to store scroller position when use ajax.reload()

whywhy Posts: 2Questions: 1Answers: 0

Hello all,
I use the last DataTables 1.10.12 and Scroller 1.2.0 , when I use ajax.reload() refresh data, the scroll bar position will move to the top of table . How can I move the scroll bar to the exact row after reload data.

Thanks,
August

Answers

  • Tom (DataTables)Tom (DataTables) Posts: 139Questions: 0Answers: 26

    You want to use the saveState option along with scoller, this will save the position of where you are in the table upon page reload.

    See this example for more information.

    Thanks

    Tom

  • whywhy Posts: 2Questions: 1Answers: 0

    Hi Tom,
    I have used saveState option , when I reload data from a local file, it will save the position.But when I reload data from server by ajax, the scoller will goto the top of table.

    My code :

    setInterval(function () {                   
                        table.ajax.reload(null, false);                         
                    }, 
                    20000);
    
  • jr42.gordonjr42.gordon Posts: 305Questions: 2Answers: 49

    Try this out. Before AJAX is called, save current scroll position

    // dt = DataTable object
    curr_pos = {
                'top': $(dt.settings()[0].nScrollBody).scrollTop(),
                'left': $(dt.settings()[0].nScrollBody).scrollLeft()
            };
    

    Then after data is loaded and refreshed in table

    $(dt.settings()[0].nScrollBody).scrollTop( curr_pos.top );
    $(dt.settings()[0].nScrollBody).scrollLeft( curr_pos.left );
    
  • allanallan Posts: 49,715Questions: 1Answers: 7,339 Site admin

    I've just tried putting a little example together: http://live.datatables.net/duqanoni/1/edit . It appears to work as you want - the scrolling position is held.

    Can you link to a test page showing the issue please.

    Allan

  • ViperetViperet Posts: 1Questions: 0Answers: 0

    Allan, your example is incorrect, because scroller requires paging: true and you have it turned off. Datatables complains about this, but alert() isn't enabled in sandboxed JS environment (see JS console).
    I narrowed problem to serverSide option. When you enable serverSide: true with Scroller extension - scrolling position isn't saved on ajax.reload(null, false);
    see modified example http://live.datatables.net/ziqavune/1/edit

  • allanallan Posts: 49,715Questions: 1Answers: 7,339 Site admin

    Thanks. That example doesn't actually use server-side processing, but this updated one does and it does show the issue you are seeing.

    I would say that with if you want to hold position with server-side processing enabled, try simply draw(). However that also appears to suffer from that issue.

    Thanks for letting me know about it. I'll try to look into it as soon as I can.

    Allan

  • coolboyjulescoolboyjules Posts: 19Questions: 6Answers: 1

    Does anyone have any idea of a workaround? Like just before ajax.reload() saving the scrollPosition and then afterwards just moving to that position? A bit hacky but it could work, no?

    Thanks

  • DavidHarkerDavidHarker Posts: 10Questions: 1Answers: 0

    Hi, I am also having this problem.

    Is there an update on this issue?

    Thanks.

  • ngmanageitngmanageit Posts: 1Questions: 0Answers: 0

    Hi, I am also having this problem.

    Any solution?

    Thanks

  • nikhilsheth2049nikhilsheth2049 Posts: 17Questions: 4Answers: 0

    Facing same problem. :(

    any one found solution?

  • allanallan Posts: 49,715Questions: 1Answers: 7,339 Site admin

    As a workaround you could possibly use Scroller.

    Allan

  • colincolin Posts: 5,389Questions: 0Answers: 937

    Hi all,

    Here's a solution - it's based on the example that Allan used before. Now, the xhr event triggers a one-off jump after the next draw, taking the table back to where it was.

    I think this should do the trick. If there's any edge cases or problems, please let me know,

    Cheers,

    Colin

  • nikhilsheth2049nikhilsheth2049 Posts: 17Questions: 4Answers: 0

    Hello Colin,

    It works for small amount of rows. Please check the same for minimum 500 records. it is not working. scroll is reset with top position. (serverSide: true, scroller: true)

  • nikhilsheth2049nikhilsheth2049 Posts: 17Questions: 4Answers: 0

    When you click on button it calls server API twice
    --- first due to ajax reload
    --- after "table.row(position).scrollTo(false);" DataTable scroller automatically call api.

    That's why for more records it is not working as expected.

  • colincolin Posts: 5,389Questions: 0Answers: 937

    Yep, looking into it now, hope to make sense of it :)

  • colincolin Posts: 5,389Questions: 0Answers: 937

    Hi @nikhilsheth2049 ,

    Right, here is the latest attempt! :)

    This time, it's getting the position of the scroll bar from the parent container, and it returns there after the reload.

    Hope his does the trick.

    Cheers,

    Colin

  • nikhilsheth2049nikhilsheth2049 Posts: 17Questions: 4Answers: 0

    Hello @colin ,

    Thanks for quick reply.

    Still it NOT works as expected. :(

    what happen when I click on button...
    --- it call api.
    --- scroll position remain same.
    --- BUT records are not shown on the table.

    before click on button :

    after click on button :

    Hope you got my point :smile:

  • colincolin Posts: 5,389Questions: 0Answers: 937

    Hi @nikhilsheth2049 ,

    Is that reproducible with the example I gave? I'm not seeing an empty table there when I follow those steps.

    Cheers,

    Colin

  • nikhilsheth2049nikhilsheth2049 Posts: 17Questions: 4Answers: 0

    Hello @colin ,

    Sorry for late reply(different timezone :smile: ).

    Ya your example is perfect.

    It produce blank data in datatable because I used rowsgroup plugin. If I remove that plugin then it works fine as expected but if I add that rowsgroup plugin then it creates blank data only when click on button(as we discussed).

    Will you help to combine rowsGroup with your example ?

    Thanks in advance.

  • colincolin Posts: 5,389Questions: 0Answers: 937

    Hi again,

    That rowsGroup plugin isn't one of ours, it's a third-party plugin created by one of the community members. We're happy to take a look, we could write an example under the Support 60 option.

    Cheers,

    Colin

  • PerronPerron Posts: 1Questions: 0Answers: 0

    Hi all

    Older post, but I seem to have the same kind of problem.

    However, the table only scrolls all the way up when a row is selected (just before the reload) from the first 'draw page'. When I scroll down to subsequent draws, then the selected postion remains correct.

    Does that help to solve the problem?

  • colincolin Posts: 5,389Questions: 0Answers: 937

    Hi @Perron ,

    We're happy to take a look, but as per the forum rules, please link to a test case - a test case that replicates the issue will ensure you'll get a quick and accurate response. Information on how to create a test case (if you aren't able to link to the page you are working on) is available here.

    Cheers,

    Colin

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