Kirk: THANKS!!
That sounds great, and you taught me more too. Jody > On May 30, 2018, at 11:57 AM, Kirk Brooks via 4D_Tech <4d_tech@lists.4d.com> > wrote: > > Hi Jody, > > On Wed, May 30, 2018 at 10:39 AM Jody Bevan via 4D_Tech < > 4d_tech@lists.4d.com> wrote: > >> 1. How can the parent form know that a change was made in the Subform >> Detail form (which is information from another table) so that it will save >> the record? Ideally I will be able to determine what changes were made in >> each field. >> > > Code in the subform executes CALL SUBFORM CONTAINER($myEvent) > $myEvent is a custom event number. It can be anything. If you just want to > know about basic events from the subform you can pass > > Form event*-1 > > It's a good, but not required, idea to send the inverse of the Form event > to avoid confusion. Or you can make up your own numbers. Don't go crazy > with this - you probably only need one or two. > > Back on the parent form the subform object receives this and you can read > it with the Form event function. Here's the thing - this form event fires > on the subform no matter what. So you don't need to enable the subform for > anything for this form event to fire there. In fact I pretty rarely use any > of the parent level form events on my subforms. > > However, if you are manipulating data in another table in the subform I'd > encourage you to manage the saving of that record in the subform code. The > idea being to encapsulate the subform operations within themselves. > > Remember that the subform maintains its own memory space for local vars (so > $myVar on the parent isn't seen by subform methods and vice versa). > Subforms also have their own name space, so an object named "form_title" > can exist on the parent form and the subform with no conflict. > > HTH > -- > Kirk Brooks > San Francisco, CA > ======================= > ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **********************************************************************
