Re: Function Key on Subfile Program

[Mark Murphy <jmarkmurphy@xxxxxxxxx>]

You only have the WRITE there. The program doesn't stop and wait for the
user to do something until you do an EXFMT or READ. According to the I/O
feedback area document, the feedback area is returned for every successful
I/O operation. So I suspect that if you look at the AIB character after a
write, it will reflect the last key pressed. It doesn't really mean
anything except on an input operation. I don't think you can update that
area and expect the values you put in there to stay across an IO operation
to the associated file.

On Tue, Mar 7, 2023 at 10:18 AM Brad Stone <bvstone@xxxxxxxxx> wrote:

> It's been years since I've written a subfile program, but I have a
> question.
>
> The program has a subfile (SFL01, CTL01, OVR01) as well as another screen
> (SCR01).
>
> The F3 key is defined on the subfile as well as the screen.
>
> SCR01 is displayed when they take an option on a subfile record.  The
> screen is displayed and if they hit F3 we come back to the loop displaying
> the subfile.  F5 (refresh) is forced into the function key so the subfile
> is refresh, but for some reason when we are initializing the subfile
> (writing the CTL01 record) it's getting set back to F3, so then it exits
> the program all together.
>
>      FGGFAS1D   CF   E             WORKSTN
>      F                                     SFILE(SFL01:RRN)
>      F                                     INFDS(WDSUBF)
>      D WDSUBF          DS
>      D  W$KEY                369    369
>      D  SFLPG#               378    379B 0
>
> So, the W$KEY is what we check to see what function key they pressed.  It's
> x'40' on startup.
>
> They go into the SCR01 and press F3 and it's x'33'.  The value x'35' (F5)
> is being forced into it so the subfile is refreshed... but during this
> code, it's set back to x'33'.
>
>        C                   eval      RRN = 0
>        C                   MOVEA     '0010'        *IN(31)
>        C                   WRITE     CTL01
>        C                   MOVEA     '0100'        *IN(31)
>
> The WRITE operation is where it gets set back.  And of course that causes
> it to exit out all together (which we don't want to happen).
>
> I don't recall this happening before.. then again, it's been years since
> I've done a subfile.  :)
>
> Bradley V. Stone
> www.bvstools.com
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