Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!schooner.cis.ohio-state.edu!thitt
From: thitt@schooner.cis.ohio-state.edu (Todd A Hitt)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Standard File and Desk Accessories
Message-ID: <51276@tut.cis.ohio-state.edu>
Date: 7 Jun 89 02:54:44 GMT
References: <50967@tut.cis.ohio-state.edu> <7547@hoptoad.uucp> <4972@umd5.umd.edu>
Sender: news@tut.cis.ohio-state.edu
Reply-To: Todd A Hitt <thitt@cis.ohio-state.edu>
Organization: Ohio State University Computer and Information Science
Lines: 61

Thanks for all your ideas on Desk Accessories & (non)Standard-File.  For a few
of you who have asked why I can't use globals it's because I have a DA that's
mostly in MPW Pascal and somewhat in MPW C.  Neither one of these environments
provide "official" support for globals in DA's.  I'm sure someone from
Symantec can enlighten us but I think they get around this problem by using
another register (maybe A4?) to "anchor" the global variables.  I believe
that applications have their globals referenced by A5.

But enough of that.  Here's the solution or part of it, I used (and it works)
that was sent to me by Krzysztof Kozminski:

>In article <50967@tut.cis.ohio-state.edu> you write:
>>Has anybody used a non-standard dialog box with SFPPutFile?  I would like
>>to add a check box to the bottom of my PutFile dialog box.  In my dlgHook
>>procedure I can toggle this item, but...how does one get the status of
>>whether the check box was checked after SFPPutFile returns?
>>
>>I can't use a global variable in a Desk Accessory.  I've tried using the
>>dialog's refCon - which causes Standard File to crash.
>
>I am not sure how you are going to use dialog's refCon - I don't think
>you can get at your DialogPtr before or after calling CFPPutFile ...
>
>Anyway, just an idea, based on what I do:
>
>	long **h = NewHandle(4);
>	int checkBoxValue;
>
>	**h = (long) &checkBoxValue;
>	AddResource(h,'pvte',0,"\p");
>
>	/* Now you have a private resource (in whatever is the current
>	   resource file) that stores the address of your result. */
>	
>	SFPPutfFile( ..., myHook, ...);
>
>	/* my Hook calls GetResource(...'pvte',0...) to find out where to
>	   put the value of the check box control. */
>	
>	RmveResource(h);	/* Don't want it added to, e.g., System */
>
[stuff deleted]

I've modified it a little to suit me but it works like a champ.  I do feel
a little funny using the resource manager like this, but it doesn't look like
there is any particularly clean way to do this.

Thanks Krzysztof!

=	=	=	=	=	=	=	=	=	=
Todd Hitt				 thitt@cis.ohio-state.edu
Battelle Columbus/Ohio State University	 hitt%36.114@ohstpy.mps.ohio-state.edu
(614)424-3297
"You were not put on this earth to 'Get It'"
	- "Lo Pan" in Big Trouble in Little China

-=-


=	=	=	=	=	=	=	=	=	=
Todd Hitt				 thitt@cis.ohio-state.edu