Add your own valueChangeHandler that keeps track of the last Index state:
class LastIndexTracker implements ValueChangeHandler<String> {
Index lastIndex;
...
void onValueChange(ValueChangeEvent<String> event) {
if (isIndexToken(...)) {
lastIndex = ....;
}
}
Index getLastIndex() {
return lastIndex;
}
}
On Mon, Feb 27, 2012 at 10:14 AM, Lars <[email protected]> wrote:
> Been searching for an answer to the following problem.... I have an
> application with 2 Places: "Index" and "Edit" each have representative
> tokens that carry state information.
>
> My desire:
> I want for the user to be able to return to the last "Index" state after
> many possible "Edit" states, so say these tokens are on the history stack:
> 1. INDEX:--23--pg1
> 2. INDEX:--23--pg2
> (user sees the document they want to edit and thus enter EDIT place)
> 3. EDIT:--docFOO
> (see anther document from a widget in the EDIT place)
> 4. EDIT:--docBAR
> (and another)
> 5. EDIT:--docBING
>
> Now arrives the problem... I want the user to be able to go back to the
> last INDEX state. Right now my solution is to carry the token (in this
> example "INDEX:--23--pg2") around on the query string as part of the EDIT
> token. What I don't like about this solution is that if the user bookmarks
> a particular EDIT token the INDEX token that is part of the EDIT token gets
> bookmarked as well obviously, and i cannot tell whether the user really
> came from that INDEX state or not.
>
> Preferred solution: Search the History stack for the last INDEX token.
>
> Alternative solution: Use a cookie with a fairly short expiration time to
> store the last INDEX token.
>
> Thoughts? Is there a way to loop through the History stack to find
> particular tokens?
>
> Thanks in advance.
>
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