Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!usc!bloom-beacon!eru!luth!sunic!chalmers!tekno.chalmers.se!d83_sven_a
From: d83_sven_a@tekno.chalmers.se (SVEN AXELSSON)
Newsgroups: comp.sys.mac.programmer
Subject: Secret coding techniques (was: User item in a SFGetFile dialog - how?)
Message-ID: <2466@tekno.chalmers.se>
Date: 16 Oct 89 09:46:20 GMT
References: <2426@tekno.chalmers.se> <8711@hoptoad.uucp>
Organization: Chalmers Univ. of Technology, Gothenburg, Sweden
Lines: 35

In article <8711@hoptoad.uucp>, tim@hoptoad.uucp (Tim Maroney) writes:
> In article <2426@tekno.chalmers.se> d83_sven_a@tekno.chalmers.se
> (SVEN AXELSSON) writes:
>>Hi.
> 
> Hello.
> 
>>I want to put a user-item into my custom SFGetFile dialog. How do I get the
>>user-item procedure connected? I can't do the usual GetItem - SetItem stuff
>>since SFPGetFile will read the dialog template for me. Is there a way of
>>handling this, short of writing my own filterProc - something I do NOT
>>want to do.
> 
> No.  But I don't see what's wrong with writing your own filter proc.
> Just type in the function definition from Inside Mac and pass the name
> of the function to SFPGetFile.  It's certainly no harder than writing a
> user item drawing procedure.
> 
> Your item filter procedure will get passed a -1 item for initialization.
> This is the time to do the GetDItem-SetDItem soft-shoe to bind the user
> item drawing procedure.  The entire function shouldn't take more than
> ten lines if this is all you're doing.
> -- 
> Tim Maroney, Mac Software Consultant, sun!hoptoad!tim, tim@toad.com

OK, I've had a few answers similar to this one. What I meant was that I thought
I had to write my own DialogHook procedure - something altogether different
(sorry about the mixup). Actually I found out about the -1 item myself
shortly after my first posting in Apples source-code examples (SC018-StdFile).
The next question is then - where is this documented? Not in Inside Macintosh
at least (?) I suppose there are lots and lots of useful but not-too-well-
documented techniques for writing code. Is there a definite source for
finding them (loke a book or something)?

	Sven.