Help with saving state to vector with arbitrary length

[Kohei Yoshida]

Hi Albert,

On 05/06/2013 04:13 AM, Albert Thuswaldner wrote:
> Hi,
> While removing the limit of 3 sort criteria in Calc, I more or less
> intentionally left out fixing the saving of state.
>
> The state is set here:
> http://opengrok.libreoffice.org/xref/core/sc/source/ui/view/cellsh2.cxx#507
>
> and retrived here:
> http://opengrok.libreoffice.org/xref/core/sc/source/ui/view/cellsh2.cxx#429
>
> As can be seen in the code above the state is only saved for 3 sort
> criteria. The state is kept by six RIDs FN_PARAM_1 to FN_PARAM_6, one
> integer to keep record of the position in the dropdown list, and one
> boolean to hold the sort order for each criteria.
>
> How do I solve this now when the there can be an arbitary number of
> sort criteria? Is it possible to save the state as two vectors
> one integer vector, and one bool vector? Vectors with arbitrary lengths.
So, in theory, you could just store the whole ScSortParam and avoid any 
future trouble of having to decompose the sort state in the way 
currently done.  To do that, you need to derive a new class from 
SfxPoolItem that is specifically designed to store ScSortParam, store 
the ScSortParam state to this new class, and put that into rReq.  You 
can keep the new class inside sc since it'd be only used in Calc code.

Doing it this way would also future-proof ourselves against any changes 
we might make to ScSortParam in the future.  It would also eliminates 
having to retrieve the states individually and passing them to 
ScSortParam; you could just pass the whole thing in one step.

Kohei

-- 
Kohei Yoshida, LibreOffice Calc hacker, SUSE.