Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!dewey.soe.berkeley.edu!oster
From: oster@dewey.soe.berkeley.edu (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Simulating a Menu Bar with Pop-Up Menus
Message-ID: <32966@ucbvax.BERKELEY.EDU>
Date: 3 Dec 89 04:43:22 GMT
References: <9095@hoptoad.uucp> <1989Nov28.053644.28100@agate.berkeley.edu> <2880@murtoa.cs.mu.oz.au> <32943@ucbvax.BERKELEY.EDU> <2884@murtoa.cs.mu.oz.au>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster)
Organization: School of Education, UC-Berkeley
Lines: 36

In article <2884@murtoa.cs.mu.oz.au> rob@murtoa.UUCP (Robert Wallen) writes:
_>>I just checked THINK C V.4 for this. It crashed with a bus error.  
_>>It is undoubtedly a bug in Apple's code.

_>Yeh?  Why?  I mean sure the standard MDEF doesnt work quite the way I want it
_>to but I have never had it crash with bus errors or address errors...
_>Id blame Symantec before Apple on this one.
I owe Apple an apology. I just double checked using a pop-up menu tester
program I wrote.  Apple's MDEF doesn't crash on its own, this is a bug in
THINK C Version 4.

_>My biggest object to writing my own MDEF (which is basically a copy of MDEF-0)
_>is that I cant track Apples changes to the system.  I dont have a color Mac
_>(just an SE/30 :-) and so its 'real hard' to make sure that my custom MDEF,
_>CDEF, etc handle all the appropriate 'mctb' thingies.  I would prefer to be
_>able to call the 'standard' code because I know (hope) that Apple will keep it
_>up to date for me.

Apple's source code for the current MDEF 0 is available on some for-pay
services such as MacNet.  You can call the standard code, just call it
like you would any code handle:
	mdef0 = GetResource('MDEF', 0);
	HLock(mdef0);
	CallPascal(mesg, men, mRect, where, which, *mdef0);
	HUnlock(mdef0);
The standard warnings about tail patches apply here, and you can't just
jump to it, since you need to unlock it after, but I think the risk is
acceptable, since the menu manager has to be able to call user-written
MDEFs, so it unreasonable to expect MDEF0 to patch bugs in the system.


> The mac is a detour in the inevitable march of mediocre computers.
> drs@bnlux0.bnl.gov (David R. Stampf)
--- David Phillip Oster          -master of the ad hoc odd hack. 
Arpa: oster@dewey.soe.berkeley.edu 
Uucp: {uwvax,decvax}!ucbvax!oster%dewey.soe.berkeley.edu