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On 26/02/2010, at 8:34 AM, Doug Palme wrote:
I am sure this is possible but what I am not sure on is how to set
it up.
I have a full screen display file that uses lines through 16. I
have a
subfile control record defined with headings on line 17 and a
subfile that
has fields layed out beginning on line 18.
What I would like to do, is display the main record format and then
lay
the subfile on top of that, so that both are displayed at the same
time.
Ensure all record formats do not overlap. This is different from
overlay. Overlap means record formats share lines and will require a
different technique. All data and display attributes for each record
format must be on discrete lines. That is the beginning or ending
attributes for a field cannot be on a line used by another format.
This can happen without you being aware of it when fields start in the
first column or end in the last column of a screen.
If all formats are discrete then simply specify OVERLAY on the second
and subsequent formats. There is an implied OVERLAY on SFL records so
you don't need to (can't?) specify it there.
I know that I have seen this done, or something similar to it at some
point. Or do I have that in reverse order, the subfile displayed
first as
a write and then exfmt on the main record format?
The order in which you write is unimportant as long as the OVERLAYing
records are written after the record without OVERLAY. You generally
need one record without OVERLAY to cause the screen to be cleared of
previous output. The decision on which format to read is usually based
on the one most likely to be changed by users. I usually build screens
from the top down but there is no requirement for that.
Consider FORMATA occupies lines 1 to 16. FORMATB (SFL) occupies lines
18 to ?? (probably 22), FORMATC (SFLCTL) occupies line 17, and FORMATD
(f-keys) occupies line 23.
I would put OVERLAY on FORMATC and FORMATD. I would load FORMATB,
write FORMATA, write FORMATD, and EXFMT on FORMATC.
If the SFL is simply informational and FORMATA accepts user input then
I would probably put OVERLAY on FORMATA, and FORMATC. I would load
FORMATB, write FORMATD, write FORMATC, and EXFMT on FORMATA.
Other combinations are equally valid.
Regards,
Simon Coulter.
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