Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!stevec
From: stevec@Apple.COM (Steve Christensen)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Dialog problems in DA
Message-ID: <47695@apple.Apple.COM>
Date: 3 Jan 91 03:41:06 GMT
References: <4927@tellab5.tellabs.com>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 36

kenk@sunHd.tellabs.com (Ken Konecki) writes:
>I'm having trouble getting dialogs to work inside of a desk accessory. I
>keep the item list as an owned resource and do a GetResource() call to get
>a handle to it. When I create the dialog, I use NewDialog() and pass the
>handle of the item list obtained from GetResource() as the item list
>parameter. I do the dialogging and then call CloseDialog() at the end of
>the routine. Everything works as I expect it to but only on the first time
>I bring up the dialog. The second time I try, I get an address error and
>get dropped into Macsbug. Stepping through the routine with Macsbug, I've
>found that the call to NewDialog() returns a valid dialog record, but the
>control list is NIL. As you would expect, the first time through the
>routine, the control list of the dialog window is not NIL. This is of
>course why it the routine bombs the second time but not the first. The big
>question is: Why is the control list NIL the second time I call
>NewDialog()?
>
>I have enclosed the offending routine at the end of this post. The desk
>accessory I'm writing is a simple calendar display. The dialog is used to
>set the month and year that is being displayed. I'm using Think C 4.0 on a
>Mac SE.
>
> [code snippet deleted]

I guess my first question would be "why aren't you just using a dialog
template (DLOG) as well as the item list (DITL)?".  You can then just
call GetNewDialog() which will return a non-nil pointer if everything
is setup OK.  I don't know exactly why your way is failing, but this
seems a whole lot simpler...

steve

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