From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,714a8558b02b32bb X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2004-01-23 09:52:17 PST Path: archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed.stanford.edu!cyclone.bc.net!news.uunet.ca!nf3.bellglobal.com!nf1.bellglobal.com!nf2.bellglobal.com!news20.bellglobal.com.POSTED!not-for-mail From: "Warren W. Gay VE3WWG" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: GUI was Re: why Ada is so unpopular ? References: <100tkcshhdi686a@corp.supernews.com> <400FD340.3080603@noplace.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <2ZcQb.20032$cQ6.820773@news20.bellglobal.com> Date: Fri, 23 Jan 2004 12:37:54 -0500 NNTP-Posting-Host: 198.96.223.163 X-Complaints-To: abuse@sympatico.ca X-Trace: news20.bellglobal.com 1074879422 198.96.223.163 (Fri, 23 Jan 2004 12:37:02 EST) NNTP-Posting-Date: Fri, 23 Jan 2004 12:37:02 EST Organization: Bell Sympatico Xref: archiver1.google.com comp.lang.ada:4729 Date: 2004-01-23T12:37:54-05:00 List-Id: Jeffrey Carter wrote: > Warren W. Gay VE3WWG wrote: >> Marin David Condic wrote: >>> Wait a minute. Aren't directories usually considered to be some kind >>> of tree structure? Doesn't MSVC++ and the MFC supply some kind of >>> tree widget for displaying things like directories? Seems like every >>> time I pop up a directory on Windows, I see something that looks very >>> reminiscent of a tree and one that looks surprisingly like the one I >>> seem to recall was in the MFC. Maybe I'm wrong, but it looks to me >>> like Microsoft might just be keeping some kind of tree data structure >>> in place for handling directories. Not that the fact that Microsoft >>> does something necessarily makes a recomendation for doing the same - >>> but it would seem like it might not be all that painful for some apps. >> >> You're right, but this doesn't work very well when you drop >> into a directory with thousands of files. A smart tree widget >> might just peruse "directory portions", where the tree widget >> is visible (perhaps a less than trivial exercise). But I suspect >> they take the easy way out, and require all entries to be loaded >> in to the widget's dynamic memory. Otherwise performance in large >> directory cases would not be so abysmal. > > The Windows directory tree only shows directories; the thousands of > files are not part of the tree. This helps reduce the size of the tree. > The thousands of files are shown in the other pane of the window; as you > note, it can take a long time to display all the files in a directory > with many files. What guarantee do you have that you will not have thousands of directories? There is no such guarantee, although you might find it more rare in practice ;-) -- Warren W. Gay VE3WWG http://ve3wwg.tk