This is Be-careful in view mode; [Up]
Date: Sun 13-Jul-1989 23:55:47 From: Unknown Subject: Be careful! I spent a lot of hours tracking this down, so in the interests of saving other people time--- Be *very* careful using save/restore in DPS. My specific example was to do a save/restore around a particularly complex operation. Inside that operation if an error occurred I would call NXAlert() (or NXRunAlertPanel()). The first time the alert went up, everything was fine. Then I repeated my complex operation, and got another error---this NXAlert() didn't work so well. (To clarify: save/NXAlert/restore/save/NXAlert/restore is the sequence that breaks things.) This sort of makes sense; the first NXAlert sets things up for any subsequent NXAlerts---and if you restore out from under the first one, of course you'll get problems. In summary, programming DPS is *not* the same as programming PostScript as far as save/restore is concerned. Solution? Use a different PS context for your own rendering and don't call Appkit stuff in that context, or simply be very careful about what operations you allow inside of a save/restore pair. -tom "just trying to get some useful information into this group, which to date has been a pretty dull party, like those ones you go to at some major academic conferences with the nerds who neither know how to dance nor how to drink, so they sit around and blab about computers while the *wonderful* dance music wastes itself bouncing against the walls, but I don't suppose anyone reading this group knows what I mean . . . >From: mnkonar@gorby.SRC.Honeywell.COM (Murat N. Konar)
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Marcel Waldvogel and Netfuture.ch.