RE: Display file attributes

The declaration of Mesg78_A is as follows:
A            MESG78_A       1A  P       and "works".

It just "doesn't stop working" at the end of "Mesg78", but continues on past
the end of the field for 82 more characters, until immediately before the
next field on the screen.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Vernon Hamberg
Sent: Wednesday, November 03, 2004 7:27 PM
To: Midrange Systems Technical Discussion
Subject: Re: Display file attributes


Tim

What is the declaration of &MESG78_A - should be 1 character, right? And 
what value do you give it?

Also, is it defined in the same format where it is used?

Vern

At 06:54 PM 11/3/2004, you wrote:
>Following suggestions made by list members to a previously asked 
>question, I have converted a display file from using an indicator 
>driven/hard-coded attribute to using a program generated attribute 
>field. I have encountered a discrepancy I did not expect. This being my 
>first attempt at using these 'P' fields, I don't know if my 
>expectations were wrong or my implementation was incorrect.
>
>Initially, the DDS for the field had:
>A            MESG78        78   O 22  2
>A  99                                             DSPATR(RI)
>A  99                                             DSPATR(BL)
>A                                           24  3'F12>'
>I changed this to:
>A            MESG78        78   O 22  2
>A                                      DSPATR(&MESG78_A)
>A                                           24  3'F12>'
>
>Note that the only change is in the 'DSPATR' lines.
>
>Initially, when there was an error (*In99 - *On) the field Mesg78 would 
>show correctly, reverse imaged and blinking. The 'non-field' part of 
>the display (line22pos80, line23, and line24pos1) immediately following 
>the MESG78 field would show as normal.
>
>After I changed to using the attribute field 'Mesg78_A', the Mesg78 
>field was reverse imaged and blinking, but the attributes did not stop 
>at the end of the intended field. Instead, they continued until line 
>24, position 1. This is the position immediately before the space where 
>the attributes for next declared field would be. In neither case does 
>the constant 'F12>' have any explicitly declared attributes, either 
>hard-coded or P-Fields.
>
>I did not see anything concerning differences between 'hard-code' 
>DSPATRs and P-field DSPATRs in the 'DDS Reference: Display Files' 
>manual.
>
>I have not done enough testing to verify my conclusion, but it appears 
>that a P-Field attribute is in effect until the next declared screen 
>field is reached, and that a hardcode attribute applies only to the 
>intended field.
>
>Is this difference intentional?
>Do I have something incorrect in my code?
>What is the best method of having the P-field attribute end where 
>intended? If this is an 'undocumented feature', are there any others 
>that I should be aware of before (if) I adopt 'P-fields' as my standard 
>method of applying attributes?
>
>Thanks in advance for any help.
>
>Tim Kredlo
>Exterior Wood, Inc
>
>
>
>
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