Re: Using a timeout with display files

On Aug 12, 2021, at 5:22 PM, Peter Dow <petercdow@xxxxxxxxx> wrote:

I wrote a test display file and program to answer that.

The display file has 5 i/o fields and the INVITE keyword on the record format. It was compiled with DFRWRT(*NO).

The program WRITEs the display record, sleeps for 10 seconds, then uses your routines from RPG Error Handling redpiece to capture the screen and write the contents to a file.

I ran it and entered some data, but did not press ENTER or any other AID key. After 10 seconds, the program ended, and the file showed the data I had entered.

So it DOES capture the current content as keyed in.

Btw, thanks for those examples in the redpiece - made it much easier to test this!

--
*Peter Dow* /
Dow Software Services, Inc.
909 793-9050
petercdow@xxxxxxxxx <mailto:petercdow@xxxxxxxxx>
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On 8/12/2021 8:05 AM, Jon Paris wrote:

Yes it will do it without a key being pressed - but it is _what_ it reads that I am unsure of. i.e. the last buffered content or the physical current content as keyed in. I hope for the latter but as I said have never used it in that context.


Jon Paris

On Aug 11, 2021, at 5:47 PM, Peter Dow <petercdow@xxxxxxxxx> wrote:

Well, the quote says it will read the contents without requiring an AID key to be pressed. However, I've never used it; I would've thought getting the handles would be the major drawback.

I seem to remember way back pre-internet someone writing a utility to share a screen that, unlike STRCPYSCN, showed the screen without waiting for an AID key.

I'll take a look at the Redpiece.


On 8/11/2021 2:22 PM, Jon Paris wrote:

Be in treating to see if that works Peter. I've used the DSM APIs a few times but never for this purpose.

I suspect that it may not work because we are dealing here with a block mode terminal - and if no key has been pressed (such as enter or an F key) that would cause data to be sent then I suspect that this API will not get the exact current content.

As to the handles etc. the RPG Redpiece on Error Handling includes code to do that because we used the API to grab the screen content in the event of an error.


Jon Paris

On Aug 11, 2021, at 1:24 PM, Peter Dow <petercdow@xxxxxxxxx> wrote:

Hi Javier,

Take a look at https://www.ibm.com/docs/en/i/7.1?topic=ssw_ibm_i_71/apis/QsnReadScr.htm

"The Read Screen (QsnReadScr) API reads the contents of the entire screen without requiring an AID-generating key to be pressed."

The trick would be getting the input buffer and command handles.

That also has a link to https://www.ibm.com/docs/en/i/7.1?topic=ssw_ibm_i_71/apis/QsnReadImm.htm

"The Read Immediate (QsnReadImm) API reads the contents of all input fields on the display without requiring an AID key to be pressed."

Good luck!

--
*Peter Dow* /
Dow Software Services, Inc.
909 793-9050
petercdow@xxxxxxxxx <mailto:petercdow@xxxxxxxxx>
pdow@xxxxxxxxxxxxxx <mailto:pdow@xxxxxxxxxxxxxx>

/
On 8/11/2021 10:11 AM, Javier Sanchez wrote:

John/Daniel:

All that is already working. What I need is to know if there is a way to
enforce the system to actually read the display with what's on it if there
was anything typed in on it by the user. What I'm having now is working,
the 30-second timeout gives control back to the program, but I don't have
any modified data by the user.

I was looking after the use of the MDT indicator, but I'm not sure if when
it times out, it would turn the MDT's on and have any data back in the
program.

Thanks!!!

message: 2

date: Wed, 11 Aug 2021 15:56:23 +0000
from: John Rusling via RPG400-L <rpg400-l@xxxxxxxxxxxxxxxxxx>
subject: RE: Using a timeout with display files

Javier,

Only way I know of is override the display file and then use write/reads
instead of exfmt on the display file.

My (old) example, all rpg . . .

o--------------------------------------------------------------------------
<=> - Timeout a workstations after nn period of inactivity
--------------------------------------------------------------------------
ftsusdp4d cf e workstn
f usropn
f maxdev(*file)

. . .

// Override waitrcd on the display file for shorter interval
gCmd = 'OVRDSPF FILE(TSUSDP4D) TOFILE(*LIBL/TSUSDP4D)
WAITRCD(30)';
gMsgid = utlty_RunCmd(gCmd);
if not %open(tsusdp4d);
open tsusdp4d;
endif;
- - - -
. . .
monitor;
// Write screen, wait for input
write SCREEN1;
read tsusdp4d;
on-error 1331;
msg_Completion('Due to inactivity, ' + %trimr(psds.Pgm)
+ ' auto-exited.':3);
exsr @exit;
endmon;

hth - john


------------------------------

message: 3
date: Wed, 11 Aug 2021 18:18:53 +0200
from: Daniel Gross <daniel@xxxxxxxx>
subject: Re: Using a timeout with display files

Man, these tricks a so long ago - I don't remember exactly, but is it
possible, that you need to code the INVITE keyword on DDS level?

I think I wrote something similar about 20-25 years ago for the logistics
company I worked for - but I don't remember exactly how I did it - but
INVITE plopped up in my mind, when I read your mail - but I don't know, if
it is right.

HTH
Daniel

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