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From: stevec@Apple.COM (Steve Christensen)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Using Scrollbars in Dialog Boxes
Message-ID: <9752@goofy.Apple.COM>
Date: 14 Aug 90 22:45:57 GMT
References: <1990Aug14.170520.12153@Neon.Stanford.EDU>
Distribution: na
Organization: Apple Computer Inc., Cupertino, CA
Lines: 25

In article <1990Aug14.170520.12153@Neon.Stanford.EDU> Peter Commons writes:
>I'm trying to use scrollbars in a dialog box and have run into a bit of a snag.
>If I make a call to ModalDialog(), how do I (when do I) track the user's 
>manipulation of the scrollbar? Do I need to write my own filterProc? 

As I recall, if you have a button, checkbox, or control item in a dialog,
ModalDialog will handle tracking the control for you and then return with
the dialog item number in itemHit.  Unfortunately for scrollbars, the tracking
just nudges the position by 1 (i.e., no auto scroll).  If I need a scrollbar
in a dialog, I've just made the item a userItem, built my own scrollbar, and
then when I get a click on the userItem, I call TrackControl() with or with-
out an actionProc depending on whether or not the hit was in the thumb...

steve

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  Steve Christensen             Internet:   stevec@goofy.apple.com
  Apple Computer, Inc.          AppleLink:  STEVEC
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