The Demonstrate Subfile 5 (Array/PosTo) command provides a
demonstration of a subfile loaded from array data. A 'Position To'
option is supported. The code provided includes comments for how to
modify the source to fit your specific needs. The subfile provides
an option to select one of the entries which causes the value to be
passed back as a parameter. A display option is also provided.
You can try out the function with the command:
DMOSUBF5
To further exercise the demonstration:
- Try the display option
- Rollup/Rolldown
- Select a value
- Try the 'Position To' function
- Try the Help key
- End with F3 or F12 without making a selection
DMOSUBF5 is a subset of the DMOSUBF tool with the major difference
that array data is used to load the subfile rather than data base
records. This is typical of many applications that have a small
number of values that the user can select from and a subfile provides
a good selection technique.
The intent of the source is to allow you to build a similar subfile
display application with a minimum of effort.
All of the screens support help text. The help text shown is
standard for things like function keys and option entries. Sample
formats are provided for field help text.
Differences with other DMOSUBF tools
------------------------------------
The DMOSUBF tool provides a typical work type display of data base
records in a subfile.
The DMOSUBF2 command (part of DMOSUBF) provides display only
functions (no changes or additions) of data base records in a
subfile.
DMOSUBF3 provides the same function as DMOSUBF5, but does not have a
'Position To' entry at the top of the display.
DMOSUBF4 provides the same function as DMOSUBF3 except that a window
is used.
DMOSUBF6 provides the same function as DMOSUBF4 plus a 'Position To'
entry.
Getting started
---------------
Command definition, CL, DDS, and RPG source are provided. You may
not want a command interface or a CL program, but rather call the RPG
program from some other program. Or you may decide to use the CL
program only during the testing of the code and then eliminate it
when integrating the RPG/DDS code into a full application.
The DUPSTDSRC command provides a simple method of copying the
standard source. The SRCTYP *SUBF5xxx must be used:
*SUBF5CMD Command definition source
*SUBF5CLP CL source
*SUBF5RPG RPG source
*SUBF5DSPF DDS Display file source
For example, to duplicate the RPG source, use:
DUPSTDSRC MBR(xxx) SRCTYP(*SUBF5RPG) TEXT('...')
SRCFILE(QRPGSRC)
For each source member that you copy, some number of required changes
are needed. Optional changes may also be made. The typical use
would be to make only the required changes and achieve a working
application before changing the optional statements.
As with DMOSUBF, the source includes comments to assist you in making
the changes. There are 2 kinds of comments:
** Temporary. These are designed to assist you in making changes
to the source. After your application is ready, you may
remove these comments with the RMVSRCCMT TAA Tool.
** Permanent. These are designed to be retained in the source to
document the code.
Array data
----------
The program is written so that the array data is part of the program
(compile time array). It could be loaded from a file or from your
own code at the beginning of the program.
The program is written so that only a value and a text description
will appear in the subfile and the same values appear if a record is
displayed. You may have a more complex set of information to be
displayed in the subfile as well as more detail information.
The program assumes that when an array element is read from the ARVAL
array that is blank, 'end of file' is sensed and the last page of
entries is displayed. You may have a different method of determining
the 'end of file' and if so scan the RPG source for ENDFILE.
Instead of array data, your data may be in a data base file. If the
file contains a small number of records (such as 100 or less), you
may choose to use DMOSUBF5 rather than DMOSUBF2 which deals with data
base records. For example, you could read the data at the beginning
of the program and place it an array or a multiple occurrence data
structure.
Alternate View
--------------
The default in the standard code is to provide a single view of the
data (the Demonstration default allows an alternate view).
You may specify an option for an alternate view by scanning the RPG
code for ALTVW and use a SETON instead of a SETOF.
This activates the F11 key to allow a flip/flop between the main and
alternate view. The F11 description is either 'View 1' or 'View 2'.
The RPG ZZCVT subroutine is used for converting both the main and
alternate view fields prior to display if needed.
Fields for the alternate view should be entered in DDS (Scan for
ALTVW) and follow the instructions.
Command parameters *CMD
------------------
None
Restrictions
------------
Only the first '1' option is used to return a value. If multiple are
entered by the user, all those after the first are ignored.
Prerequisites
-------------
The following TAA Tools must be on your system:
ADJVAR Adjust variable
FILEFDBCK File feedback
SNDESCMSG Send escape message
Implementation
--------------
None, the tool is ready to use.
Objects used by the tool
------------------------
Object Type Attribute Src member Src file
------ ---- --------- ---------- ----------
DMOSUBF5 *CMD TAASTDF QATTCMD
TAASTDFC *PGM CLP TAASTDFC QATTCL
TAASTDFR *PGM RPG TAASTDFR QATTRPG
TAASTDFD *FILE DSPF TAASTDFD QATTDDS
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