Cubist at aol.com
Cubist at aol.com
Fri Jan 14 17:06:26 CST 2005
sez aj445 at traverse.lib.mi.us:
>OK, I've got a stack working, now I want to make it less klunky.
>Right now, the user answers questions in a series of Question & Answer
>cards, and when they go to the Summary card, all the questions and
>responses are listed in one scrolling text field.
>It is automatic-- every time the Summary card is opened, there is a new
>summary added on top of the old one, and all are saved.
> pass openCard
> repeat with i = 1 to the number of cds of bg "Q&A"
> put (bg fld "Question" of cd i of bg "Q&A") & return after
> put (bg fld "Response" of cd i of bg "Q&A") & return & return
> end repeat
> put the long date & return & theSummary before cd fld "Destination"
>of cd "List"
>Of course, this means that EVERY time the summary page is opened, there
>is a new set appended to the old-- this can add up if you thrash around
>in the stack a while!
Since your code creates a fresh, shiny new summary every time, why not
just *put* that summary into the target field? Yes, that would nuke whatever old
summary used to be there. Is this a problem?
>One solution might be to only do the update if the answers on the Q&A
>cards have changed.
>How would this be done?
Well, it depends on what you want to do.
Scenario 1: Complete summary every time, old summaries are forgotten
Just put the fresh summary into the target field and be done with it.
Scenario 2: Complete summary every time, old summaries are NOT forgotten
Create the fresh summary, put it before the target field.
Scenario 3: Summary consists of ONLY those answers that have changed since
last time, old summaries are NOT forgotten
This one needs a little work. Give each answer-card a custom property,
call it ChangedReply or something. In an openCard handler, save the
previously-existing answer that *was* on the card; on a closeCard handler, compare the
saved answer to the *current* answer, and set the ChangedReply of that card
accordingly. Like so:
put field "Answer" into OldAnswer
-- plus whatever else you do, if anything, in openCard
set the ChangedReply of this card to (field "Answer" <> OldAnswer)
-- plus whatever else you do, if anything, in closeCard
If this were HyperCard, you'd probably have all your Answer cards sharing
a single background, and these handlers would go into that background script.
This being Rev, the equivalent trick would be to have all the Answer-related
stuff (fields, etc) in a group which is shared by all your Answer cards, and
these handlers would go into the scrip of that group.
So: You've now got ChangedReply properties for all your Answer cards, and
the ChangedReply property of any given card is True if the user changed his
answer the last time he visited that card, or False otherwise. With all that in
mind, your Summarize handler could end up looking like this:
repeat with i = 1 to the number of cds of bg "Q&A"
if (the ChangedReply of cd i of bg "Q&A) then
put (bg fld "Question" of cd i of bg "Q&A") & return after theSummary
put (bg fld "Response" of cd i of bg "Q&A") & return & return after
put the long date & return & theSummary & return & "- - - - - - -" & return
before cd fld "Destination" of cd "List"
When that "if" statement in the loop is executed, only those cards for
which the reply *has* changed, and which therefore have True as the value for
their ChangedReply property, will show up in the summary.
Hope this helps...
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