RE: Single Page Subfile Example

["Denzil D'souza" <Denzild@xxxxxxxxxxxxxxxxx>]

Hi
Chandra,

It would be ideal if you could have a temp file, with a structure similar to
that of your subfile...+ a unique key that would identify a relationship
between your subfile record and the temp file records..(could be a hidden
field in the SFL)

The tempfile would be written/updated only in the follwing events and only
when the option typed on the sfl is valid!!
        PageUP
        Page Down
        Enter
        Any other operations like Top or Bottom positioning.....

For this you'd have to use the field(s) in the SFL(fetched by READC) to
chain on your temp file to check if the record is already present...then
perform a chain,
        If the record is found 
                update the temp file
        else 
                Write to the temp file


For processing the options, you'd have to process only when enter is
pressed, then you'd have to read your temp file, process the record based on
the option number that is stored in your temp file and once the record is
processed delete the record...(this would take care of clearing the tempfile
for the next refreshed load)


For your load routine,

        your load logic....goes here
                Once your subfile field are loaded and before the write
                        Chain on your tempfile using the key from the
subfile record
                                If found 
                                        Move Option_Field_Value from
tempfile to the option_field_value of Subfile
                                Else
                                        Move blanks to the
option_field_value of Subfile
                                
                        Increment your RRN
                        WRITE To SFL 

Hope this is clear...

Best Regards
Denzil D'Souza
\m/   \m/





-----Original Message-----
From: Chandra Sekhar Rath [mailto:ChandraRS@xxxxxxxxxxxxxxxxx]
Sent: Monday, July 14, 2003 3:56 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: RE: Single Page Subfile Example 


     Hello Booth,
    
     Thanks for the pointer.Regarding the function keys , what i was trying
to find out is , if i display a screen with a page of records
     and say the user presses option 4 for deletion in 3 records and then
presses page down with out hitting enter.In that case , i       have to
clear the existing records(Since it is a single Page subfile) and build the
next set of records.Now at this instance , if the 
     user presses page up , then the existing records are again cleared and
the old set up records will be displayed.But , i would have
     lost the option 4 , that the user would have entered in 3 records.

    Any work around/sample for that?

    Thanks and regards
    Chandra Sekhar
      
> ----------------------------------------------------------------------
> 
> message: 1
> date: Sun, 13 Jul 2003 08:44:39 -0500 (Central Daylight Time)
> from: "Booth Martin" <Booth@xxxxxxxxxxxx>
> subject: Re: Single Page Subfile Example
> 
> At the time that code was written there probably was not a Select/EndSl
> Opcode.  I've found the best use of programming time in those design
> situations is to consider changing the code to Select and to change the
> GOTO
> sections to sub routines.  A user can not choose two function keys at the
> same time so there should be no conflicts with logic.
>  
>  
>  
> ---------------------------------------------------------
> Booth Martin   http://www.MartinVT.com
> Booth@xxxxxxxxxxxx
> ---------------------------------------------------------
>  
> -------Original Message-------
>  
> From: RPG programming on the AS400 / iSeries
> Date: Thursday, July 10, 2003 07:30:13
> To: RPG400-L@xxxxxxxxxxxx
> Subject: Single Page Subfile Example
>  
> Hi Group,
>  
> Please let me know if there are any sample codes for wrtitng a typical
> maintainance single page subfile example in RPG IV.I understand that to
> keep
> the options , that user has selected on the screen, arrays have to be used
> for storing.So that when Page down has been pressed, and again page up is
> done i donot lose the options that the users have entered .Any example on
> how this 
> has to be done?
>  
> I have been maintaining some old codes of Load all and Expanding
> maintainance sub files.But they are not very structured in the sense that
> they use a lot of Go to statements to handle various events after
> different
> screens are presented..Is it possible to have a single EXFMT in the code
> and
> also a single set of subroutines for handling 'keys pressed' events
> instead
> of multiple EXFMTs and same set of 'keys pressed ' subroutine copied again
> &
> again?
>  
> Please point me toward good structured RPGIV code samples
>  
>  
> Thanks and regards
> Chandra Sekhar Rath
> 
> 
> 
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