> I've seen that I've just added a scope support in ScrollBar,  with min
> and max value.
>

setScope(int, int, int) has been there since day one in ScrollBar -- all I
added was a Scope data structure so that scope looks like a bean.


>
> In cases where I don't know the max value (for example a dataset where
> i ask additional data at a certain event, for example when I scroll
> bottom, like in Oracle Forms, or like the "Infinite Scrollbar" in
> Google Picasa), the right approach will be to set the max value after
> having loaded additional data ?
>

All scroll bars must have min/max/extent.  If you want to create an
"infinite scroll bar", that's a smoke & mirrors construct created by
adjusting the scroll bar scope and/or value as the user interacts with the
scroll bar.

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