Path: utzoo!attcan!uunet!hodge!pnet06!thecloud
From: thecloud@pnet06.cts.com (Ken Mcleod)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Help!  My program disables Finder double-clicking somehow.
Message-ID: <221@hodge.UUCP>
Date: 12 Jun 88 12:32:10 GMT
Sender: rusty@hodge.UUCP
Organization: People-Net [pnet06], Orange, CA
Lines: 29

guido@cwi.nl (Guido van Rossum) writes:
> [more stuff in reply to question about loss of double-clicks]
>
>Besides, the Finder should be smart enough to reset its event mask.

 There is a ***GLOBAL*** system event mask which is set by SetEventMask().
This causes the OS Event Manager to only post certain types of events to
applications (and the Finder is an application). Most applications
rightfully do not mess with the global mask; instead, if they don't
want to receive certain types of events, they pass the appropriate mask
to GetNextEvent/WaitNextEvent/EventAvail. (Ref. IM V.1 p.254; V.2 p.70)
 I have disassembled several pd/shareware applications that I've come
across which cause the Finder to ignore double-clicks after they are run.
In each, the SysEvtMask global at $0144 was being messed with.
 
 So if your program is causing the Finder to ignore double-clicks after
you run it, and you're using SetEventMask(), DON'T. Alternately, you
could do a SetEventMask(everyEvent-keyUpMask) just before your program
exits...this resets the global mask to "factory specs."
 
 By the way, I assume the previous post by atchison@hpindda.HP.COM (Lee
Atchison) meant to say "mouseUp events" instead of "keyUp events"....

Disclaimer: I have 2MB RAM, and can run FWP *and* MF.

Ken McLeod =========================     .......     ======================
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