Re: subfile processing: SFLSIZ=SFLPAG (was: readc & sflnxtchg)

Hello Wynn,

Can you explain this a bit more?  I don't understand the comments about field 
selection.  I am fairly sure 
fields in a subfile record cannot be conditioned.  So do you mean each SFL 
record is really a single field 
which is formatted programmatically?

Regards,
Simon Coulter.

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//--- forwarded letter -------------------------------------------------------
> X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.2 (32)
> Date: Thu, 11 Feb 99 21:08:18 -0500
> From: "Wynn Osborne" <wynn@praxis.net>
> To: MIDRANGE-L@midrange.com
> Reply-To: MIDRANGE-L@midrange.com
> Subject: subfile processing: SFLSIZ=SFLPAG (was: readc & sflnxtchg)

> 
> All this talk of subfiles has me thinking---
> 
> I'd like to hear some views on techniques used when SFLSIZ=SFLPAG.
> 
> I've been a codin' fer about 10 years and have only recently had my eyes
> opened with the possibilities of this neat feature. I find it very intriguing.
> 
> Of course you know that field selection is possible. But further, on each
> write to the subfile, the data may occupy any number of lines you want. For
> example, one line can show header info such as vendor info. Then for a
> detail line, you can write a record that occupies 2 lines. Further, if a
> optional data is present, one can write a record that occupies 4 lines. All
> these can be present in the same subfile.
> 
> My enigma has been trying to find a good skelatal method for doing this.
> It's tough when building pages of data that are variable in nature.
> 
> 
> Of the different schemes I've tried are:
> 
> Using a work file where you can build your subfile page behind the scenes.
> You build the work file first---then you can analyze those records and
> determine how many lines they will occupy on the screen.
> 
> Then there's the approach of doing it with live data...determining, as you
> go, the real estate taken up by the data you are accessing.
> 
> Of course, we've not even discussed paging back through data...tougher yet.
> 
> Sorry to carry on, but it'd be nice to hear how some of you have handled
> these puppies.
> 
> Wynn Osborne
> Sen P/A
> Florida

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