Monday, May 7, 2012

Scrolling a Panel Left and Right

Back on November 3rd, I wrote about "cylindrical arrays" and said "ISPF facilities do not allow the shifting of panels right and left except for some very special IBM-originated panels", but Chris Lewis introduced me to a way to simulate it.  Herewith.

The first thing is to rig the panel so that it can have any column headings you desire and fit it with a variable )MODEL.  The "desc" following is the last line of the )BODY and is where the column headings would be stored.  It is followed by a )MODEL section where the actual model is a variable:

@desc
)MODEL ROWS(SCAN)
&modl

Before the panel can be TBDISPL'd, values for those must be set up...

   /* Set up values for the variable-format panel(s)                 */
   desc1   = "V -Member- Type  A/R Base  -Userid-  ---Date--- Time   Li",
             || "btype   Cleared"
   desc2   = "V -Member- Type  A/R Base  -Userid-  -Username----      Cl",
             || "eared  As"
   modl1   = "_z!mlroot  +!z   !mlbase   !mluid    !mldate    !mltime!ml",
             || "loc    !mlclrdt "
   modl2   = "_z!mlroot  +!z   !mlbase   !mluid    !mlsname           !m",
             || "lclrdt !mlclrnm "

...and loaded to the variables named on the screen:

      modl = Value('modl'style)
      desc = Value('desc'style)

Now, whenever the response from the panel is a PF10 or PF11, call the code that inches the "cylindrical array" left or right:

   select
 
      when pfkey = "PF11" then,
         style = style//stylect + 1    /* next style                 */
 
      when pfkey = "PF10" then,
         style = (style+stylect-2)//stylect + 1       /* prev style  */
 
      otherwise nop
   end

That's all there is to it.  Once STYLE is set based on the PF10 or PF11, that style-number is used to select DESC1/MODL1 or DESC2/MODL2 just before the panel is redisplayed.  It's the same panel (really), but the content displayed there will be different enough that it will appear the panel has actually been shifted.

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