I like the idea, but I'm finding that the value change event only fires
when prefix portion of the token changes.
It does NOT fire when the token changes from:
#INDEX:----/2///$///////
to
#INDEX:----/3///$///////
But it DOES fire when it changes from:
#INDEX:----/2///$///////
to
#EDIT:----FOO
This makes it impossible to keep track of the last INDEX place the user was
on this way... I suppose I could track it in the constructor of the INDEX
place activity... i.e. make a call to your hypothetical LastIndexTrackerclass
in the Index place activity's constructor...
Thanks for your reply... By the way, am I right that the value change event
only fires this way?
On Monday, February 27, 2012 2:07:47 PM UTC-5, Ovidiu Mihaescu wrote:
>
> 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 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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