Re: Fixed v Free Display Variables

Recommendation after 30 years of building screens. Always make any screen
field move explicit, never implicit.

By that I mean, fields in the display or print file should always have a
unique name and you should always move to them explicitly. It will just
save a ton of time in debugging and modify the code.

My standard is to always use a character on the front for I (Input),
O(Output), B(Both), H (Hidden), P(Parameter) for how the field is used (I
know I will hear the screaming).

For example, field customer number used as a output field in a subfile
would be O_CUSTNO. If used in a Edit/Display Panel, it would be B_CUSNO.

So in every given cases you know exactly when the field is loaded in your
code. If you do this, you will not have any problem with having the same
field name in your program as in display file and trying to guess where it
got loaded.

If you have questions on screens, I would be happy to help.



On Thu, Jul 19, 2018 at 10:05 AM Jon Paris <jon.paris@xxxxxxxxxxxxxx> wrote:

Whatever the problem it is highly unlikely (near impossible) for it to be
a fixed/free issue. Under the covers the two are identical.

But you are obviously not showing all of your code because the dcl-proc
should be followed by a dcl-pi and there isn't one there.

Variables within a subprocedure are local and therefore would not normally
be available to display without copying it somewhere.

The fact that it has the same name in the subprocedure as it has on the
file means you have _two_ versions of the field Qty in the program - one
global (the file version) and one local (the GetHazmat version). The global
version will always be the one used by any display file output (unless Data
Structure I/O is used which is not th case here as Qty is a stand-alone.

All of which is to say that your fixed form version must have a value
being placed in the global Qty field and you free version doesn't.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Jul 19, 2018, at 6:29 AM, jyoung@xxxxxxxxxxxxx wrote:

I have an interesting question. (very new dev here) Let's say my

display file has a output field named Qty. In fixed format, the program
declares a standalone variable Qty and sets the message. The display file
shows the message when I run the program.

P GetHazmat B
D Qty S 40 Inz('G = Gallon, GP = 5 Gallon Pail')

However, if I try to do the same in free format, the message will not

display. I assume because the Qty variable is being created again? But then
why does it work fixed format? I know to solve the issue is just to not
declare it again as a standalone in free format, but that doesn't solve my
curiosity. Does anyone have some clarification?

Dcl-proc GetHazmat;
Dcl-S Qty Char(40) Inz('G = Gallon, GP = 5 Gallon Pail');

Thanks,
Jeffrey Young



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