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From Erik de Hair <e.deh...@pocos.nl>
Subject Re: changing order of collection items
Date Wed, 18 Mar 2015 14:17:17 GMT

On 03/18/2015 11:43 AM, Dan Haywood wrote:
> I've had two ideas on this.
>
> ~~~
> The first is very generic... allow no-arg actions to be rendered as buttons
> on table rows.  The action on the domain object (shown as a table row)
> would update state to change its apparent ordering).  The viewer would then
> re-render the same collection in the same way it does currently for bulk
> actions (by invoking the finder that returned the list).
This would be very nice to have. This reduces the amount of clicks to be 
performed by the user very much.
> ~~~
> The other idea is a little more specialized; introduce a new Movable
> interface into the applib, eg:
>
> public interface Movable {
>      void moveBetween(Object before, Object after);
> }
>
> Then, enhance the Wicket viewer so that "movable" objects could be dragged
> up and down; on release the viewer would invoke the "moveBetween" method
> passing the objects before and after the drop zone, and then (as above)
> re-render the list.
For updating ranks, I would prefer this solution.
>
> ~~~
> If either of these appeals then raise a ticket (actually, I think there
> might be one already for the first idea).
I will raise a ticket for both solutions.
>
> In terms of actually implementing these tickets, I have no plans myself but
> Martin (as our resident Wicket expert) might either (a) oblige or (b)
> provide some guidance.
>
> Cheers
> Dan
>
>
> On 18 March 2015 at 09:06, Martin Grigorov <mgrigorov@apache.org> wrote:
>
>> Hi,
>>
>> On Wed, Mar 18, 2015 at 10:46 AM, Erik de Hair <e.dehair@pocos.nl> wrote:
>>
>>> 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
>>>> https://twitter.com/mtgrigorov
>>>>
>>>> On Tue, Mar 17, 2015 at 7:17 PM, Erik de Hair <e.dehair@pocos.nl>
>> 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?
>>
>> Everything is possible!
>> The fastest and easiest way (for me!) would be to create a custom component
>> factory that creates a custom component for objects implementing this
>> special/custom interface and renders them as you wish. But this is me
>> thinking as a Wicket developer. Maybe Dan will have a better Isis solution
>> for the problem.
>>
>>
>>>
>>> Erik
>>>
>>>   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 <o.bou@gesconsultor.com>
>> wrote:
>>>>>>    Hi Erick.
>>>>>>
>>>>>>> Simply by implementing the Comparable interface.
>>>>>>>
>>>>>>> HTH,
>>>>>>>
>>>>>>> Oscar
>>>>>>>
>>>>>>>
>>>>>>>    El 17/3/2015, a las 16:43, Erik de Hair <e.dehair@pocos.nl>
>>>>>>> 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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