> The "sliding window" is  the exact concept 
> i'm planning to implement, but without an 
> explicit "more.." button. I would simply keep
> track of the current window (actual record in 
> the pdb) and of the selected item (offset into 
> the current window/record) and automatically 
> switch from a window to the other.

I am leaving the list management (scrolling,
etc.) to the OS so I am not quite sure this is
easy to implement; what event would you use to
decide to change your "sliding window"?

> I think the list will not be used to randomly 
> search an item, but to browse items that are 
> closer to the searched one.

Yeah, that's another reason why I haven't replaced
mine yet.  I have a search function that lets you
"jump" to a particular entry in the list (similar
to the address book find), and from there the user
might want to navigate to a neighboring record.

> Obviously a linear search is not an optimal 
> solution. 

If the records are sorted, you might be able to
use a binary search.  I think I briefly tested 
it with 40,000 records and it was reasonably
fast in my case.

Oliver


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