Redisplaying Multi-Values

A confusing feature of AREV is knowing which WINDOW_COMMON% variables to use where. Several people have asked how they can load a set of associated multivalues from an option key on a field and have the system recognise the fact that the multivalues have been loaded.

For example, we might want to press F2, load up a set of booking information (artiste, date and time) dependant on the F2 response and then return to the screen and individually amend these items. Simply plugging the information into @RECORD does not work. The data is there but the status line tells you that you are on Amv 1/0.

To achieve this, it is necessary to tell the system to redisplay @RECORD (WC_DISPLAY_ACTION% = 5), to recalculate the current prompt (WC_RESET% = 4), that the AMV values have been changed (WC_AMV_ACTION% = 5) and how many rows deep the AMV now is (WC_AMV_VARS%<0,3> = counter). Eg

          *
          *    This code is on an F2 key.  The user has been prompted
          *    for whether or not to load a parameter table into the
          *    current record.  The parameter table is a set of
          *    associated MVs in PARAM and it has to go into @RECORD<2-4>
          *
          IF USER.RESP = "Y" THEN
               FOR X = 1 TO MVS.TO.LOAD
                    @RECORD<2,-1> = PARAM<1,X>
                    @RECORD<3,-1> = PARAM<2,X>
                    @RECORD<4,-1> = PARAM<3,X>
               NEXT
               *
               *    Now toggle WINDOW_COMMON% variables (inserted at
               *    beginning)
               *
               WC_DISPLAY_ACTION% = 5
               WC_AMV_ACTION% = 5
               WC_AMV_VARS%<0,3> = MVS.TO.LOAD
               WC_RESET% = 4
          END

(Volume 1, Issue 10, Page 4)