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Unable to change row positions, when they are sorted [message #1162376]

Wed, 30 October 2013 10:32

SD Khan

Messages: 63
Registered: May 2013

Member

Hi Dirk,

I am using GlazedLists for storing rows, when i sort rows in the nattable by clicking on column header, rows are sorted correctly.

Now, i want's to move some of the rows on top, I do this by removing them from filter list and adding again on top but as rows are sorted, change does not get visible and rows remain positioned in their sorted order.

However, when i remove sorting or do this when rows are non-sorted then it works fine and rows get visible on top.

I think, sorting mechanism restrict rows to move on top, to maintain sorting order. is it right behavior ?, Is there any mode or a way through which i can change row positions when rows are already sorted ?

Thanks,
SD Khan

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Re: Unable to change row positions, when they are sorted [message #1162395 is a reply to message #1162376]

Wed, 30 October 2013 10:48

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

Hi,

Quote:

I do this by removing them from filter list and adding again on top

- If you sort using GlazedLists, the underlying list is not sorted, instead you get a sorted view on the list.
- Your modifications are performed on the base list, which means you are changing the structure of the underlying list.

Having those two facts in mind it should be obvious that changes to the underlying list are not reflected if sorting is applied. If you have such a requirement you need to use a sort mechanism that really sorts your data (Collection.sort()) instead of having just a sorted view.

Greez,
Dirk

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Re: Unable to change row positions, when they are sorted [message #1164019 is a reply to message #1162395]

Thu, 31 October 2013 11:28

SD Khan

Messages: 63
Registered: May 2013

Member

By doing some more R&D i found the mode in sorted list, now I have changed the mode of SortedList from STRICT_SORT_ORDER to AVOID_MOVING_ELEMENTS. Now, restriction does not persist after sorting and i can move the rows if they are already in sorted order Smile

.

Regards,
Safdar Khan

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