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From Erik de Hair <>
Subject Re: changing order of collection items
Date Wed, 18 Mar 2015 08:46:22 GMT
On 03/17/2015 09:16 PM, Martin Grigorov wrote:
> Hi,
> Maybe you can use the Bulk support - select few items in the table, then
> click Up/Down action and depending on the action increase/decrease the rank
> of the selected items.
> Martin Grigorov
> Freelancer, available for hire!
> Wicket Training and Consulting
> On Tue, Mar 17, 2015 at 7:17 PM, Erik de Hair <> wrote:
Hi Martin,

I thought your idea would be a nice solution but there's one problem 
when moving succeeding items down. Each pair of items will switch ranks 
than but won't move down. This could be solved by moving items down 
while beginning at the bottom of the sorted set, but I don't think I can 
influence the order in which the bulk actions are called to the single 
items, do I?

I can't expect users to only select 'solitary' items and I think it's 
not possible to check for that condition.

Would it be possible to create a different view for a datatable which 
displays the items (implementing some interface with methods like 
'rankUp/Down()') with 2 buttons per row for moving a single item up or 
down, by calling rankUp/Down of this item?

>> Hi Oscar, Dan,
>> I think my question wasn't really clear. The ordering in the table is not
>> the problem (I've already implemented the comparable interface based on the
>> mentioned rank-property).
>> I need to arbitrarily change the order of the items by moving an item up
>> or down in the list (this should change the rank values). I was wondering
>> if anybody had an idea or any experience with an elegant way to implement
>> the moving-actions to be executed by the user.
>> Thanks,
>> Erik
>> On 03/17/2015 05:48 PM, Dan Haywood wrote:
>>> And also, you can write a custom comparator and reference it using
>>> @CollectionLayout(sortedBy=MyCustomComparator.class)
>>> Cheers
>>> Dan
>>> On 17 March 2015 at 16:39, GESCONSULTOR <> wrote:
>>>   Hi Erick.
>>>> Simply by implementing the Comparable interface.
>>>> HTH,
>>>> Oscar
>>>>   El 17/3/2015, a las 16:43, Erik de Hair <> escribió:
>>>>> Hi,
>>>>> Anybody a great idea for changing item order in a sorted set using the
>>>> wicket viewer? I have a rank-property in the database but how to easily
>>>> manage the item order (move item(s) up/down single or multiple places)...
>>>>> Thanks,
>>>>> Erik

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