Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!hsdndev!husc6!zariski!fry From: fry@zariski.harvard.edu (David Fry) Newsgroups: comp.sys.mac.system Subject: Re: ScrollBar design question Message-ID: <7105@husc6.harvard.edu> Date: 26 Jun 91 03:07:39 GMT References: <1991Jun25.124247.11023@cbnews.cb.att.com> <22430@duke.cs.duke.edu> Sender: news@husc6.harvard.edu Organization: Harvard Math Department Lines: 25 In article lamont@convex.com (Bradley Lamont) writes: >In <22430@duke.cs.duke.edu> jfw@neuro (John F. Whitehead) writes: > >>... but when you slide it, you see the window slide so you know >>exactly how much you need to move it! > >For some reason, Apple chose not to do this. It is part of the mac user >interface guidelines not to update the screen during scrolling when the >"thumb" is being moved, only to update when the arrows are clicked. >From the point of view of programming it in a new application, it is >extermely easy to do. But adding it to existing applications would require >rewriting the scrollbar control routine. > Well, it's not generally applicable, but the 4-Plus programmer's add on for THINK C features a "power thumb" option that does just this for THINK C windows, so it's certainly possible to add the feature via an INIT for at least some applications. David Fry fry@math.harvard.EDU Department of Mathematics fry@huma1.bitnet Harvard University ...!harvard!huma1!fry Cambridge, MA 02138