Squeak-dev February 2000

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163 participants
655 discussions

Re: [Code Request] ProgressBar morph widget
by Bob Arning 28 Feb '00

28 Feb '00

On Sun, 27 Feb 2000 20:53:02 -0500 "Lex Spoon" <lex(a)cc.gatech.edu> wrote: >"Piero Campanelli" <campanelli(a)skylink.it> wrote: >> I am building a GUI for SUnit framework port. I'd like to add a progress >> bar widget(which tells how many tests have been done). Any of you is >> developing (or has developed) this widget ? >> Tnx > > >Such a widgit would be nice for porting the RefactoringBrowser, as well. There is one in my port. Cheers, Bob

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[CCC] ProtoObject class comment
by Dwight Hughes 28 Feb '00

28 Feb '00

Dan's comment for class ProtoObject with a tiny addition. -- Dwight ----------------------------------------------------------------- ProtoObject establishes minimal behavior required of any object in Squeak, even objects that should balk at normal object behavior. Generally these are proxy objects designed to read themselves in from the disk, or to perform some wrapper behavior, before responding to a message. Current examples are ObjectOut and ImageSegmentRootStub, and one could argue that ObjectTracer should also inherit from this class. ProtoObject has no instance variables, nor should any be added. -----------------------------------------------------------------

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Re: [CCC] Re: SqueakCCC! (class comment included)
by Dwight Hughes 28 Feb '00

28 Feb '00

I assume we should only submit the class comment itself and not an actual fileout? It's a bit awkward to fileout a class comment by itself without resorting to a changeset -- and it would in turn be awkward to create a different changeset for every single class comment done. I recently sent five new class comments to Stefan Matthias Aust, which I believe he has already sent to you to be added to the update stream. I will send them to the list under [CCC] for completeness (and further commentary of course). -- Dwight Dan Ingalls wrote: > > >May I suggest that all Class Comment Challenge contributions have "[CCC]" > >in the subject line so they can be filtered and retained for posterity? > >This is a noble undertaking, so let's not lose any of the input. > > Sorry to be slow in responding. > > I think this is a fine idea. I will commit to weekly turnaround of any class comments submitted this way. Allow me to tweak the suggestion: > > 1. Submit only one per message and use a subject line of the form: > > [CCC] PenPointRecorder class comment > > 2. Do your best to survey prior submissions to avoid duplication -- this should be pretty easy if we follow rule 1. > > 3. Mail to the Squeak List -- not me. I know this might mean a couple of hundred extra messages, but what a great problem to have!

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Re: [Code Request] ProgressBar morph widget
by Lex Spoon 28 Feb '00

28 Feb '00

"Piero Campanelli" <campanelli(a)skylink.it> wrote: > I am building a GUI for SUnit framework port. I'd like to add a progress > bar widget(which tells how many tests have been done). Any of you is > developing (or has developed) this widget ? > Tnx Such a widgit would be nice for porting the RefactoringBrowser, as well. Lex

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Re: Polling
by Lex Spoon 28 Feb '00

28 Feb '00

"Charles-A. Rovira" <crovira(a)wt.net> wrote: > There is another reason to avoid using polling. It has very little to do with > optimality but having to do with design. > > Polling assumes a centralized implementation and one CPU controlling > everything. > > If you try to distribute functionality across servers (even if they're only > serving up very simple data streams,) you may not be able to poll the system at > all. Event based designs enable you to design and implement asynchronously > distributed systems. Something which is impossible with polled designs. > As a matter of fact, Morphic is designed with events. It only uses polling at a very low level, when it decides whether a mouse click or release just happened. Lex

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Re: Squeak QuickRef PDF File
by Charles-A. Rovira 28 Feb '00

28 Feb '00

Thanks Lars, for the updated file. This is an excellent bit of documentation. You are to be applauded... I hope you will soon expand the Class hierarchy stuff though. :-) -Charles-A. Lars Nilsson wrote: > Hi all, > > In case someone has tried downloading the PDF file sometime during the past > one or two days and found it to be corrupt, there is now a working version > there. Somehow I must have managed to terminate an upload prematurely > between two computers (juggling the file between a home computer and a > work computer and the webserver itself, losing parts of it in the process). > > My apologies. > > URL: http://chamaeleon.freeservers.com > > Regards, > Lars Nilsson

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Re: [DEMO][APP] Squeak client for timeline presentation
by Russell Swan 27 Feb '00

27 Feb '00

Cool. Thanks for trying it out. On Sun, 27 Feb 2000, Karl Ramberg wrote: > Hi, > I've tested the app and it works fine. It's a really cool way to present > history/ present/ news or any topic for that matter. Can I use it for looking > trough the Squeak mailing list? Thanks. If I take the Squeak mail archive and preprocess it you should be able to use that tool for navigating and exploring it. I'll have to run it on an e-mail archive for one of my experiments. > It takes a few minutes to get used to the zooming function. How about a > magnifying glass tool? You're in Morphic, so if you pull up the World menu and select 'new morph...' you can get a Magnifier Morph and a Fisheye Morph from the Demo category. If you're talking about a non-linear timescale, it's on my list. I think the widgets I have for zooming are a bit clunky. There are 6 total and I think its a bit confusing. I'm thinking of redoing that part. Any suggestions? > It's really slow loading (+1 min) on a mac8500/150, > cable modem. I don't now how big the things pulled of the net are? The files it reads in are 11K, 16K, 90K, and 250K. > A few questions : > 1 What do the red bars mean. Some are bigger than the others, are they more > valid than the others in a demo priority list? Importance is given by y location, so the top story is on top. Size (area) relates to coverage of the topic, so if story A has a red block twice as large as story B, there's twice as much info about A. > 2 When i click on the names I get a popup menu on related issues, but the sub > menu > do not evoke anything? Not yet implemented? The 'Make Title' is implemented, all the rest call Timeline>>#doNothing. I intend to put hooks in there to call back to the server, so you can get a histogram of a terms usage over time, or view all the phrases a term appears in. At some point I have to be able to call up a document relating to a topic, so there's quite a bit of interaction still to be put in. > 3 The "fixed y" button. Is that also part of the prioritizing of the info? 'fixed y' positions all the blocks based on their importance, with the #1 at the top, and the number N (382 in one case) at the bottom. They start overwriting each other and get hard to read, so the 'fill y' on the button spreads out all the displayed topics to fill the whole grid. I have to rewrite the code that places the blocks and the buttons and add some sort of collision detection. > > All of this probably becomes part of the documentation. > > Karl > > Thanks for trying it out. My advisor is giving a demo of it on Tuesday and I started getting nervous when I read statements about Morphic being 2 mouseclicks away from disaster. -Russell Swan

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Re: Pluggable Web Server!?! Why was this so hidden?
by Mark Guzdial 27 Feb '00

27 Feb '00

>HAAAAAAAAAA!!!!! > >I just discovered that there is something called Pluggable Web Server >that will let me write CGI scripts in Squeak! I was just wandering and >exploring the Web tonight and stumbled on page: >http://www.cc.gatech.edu/fac/mark.guzdial/squeak/pws/ >...Now I have to read all the docs I can find (HA! We don't write no >steeenkeen documentation... Read the code and feegure eet out, Gringo!) >to learn to write all the CGI stuff in PWS. I'm writing a large lecture on how to program PWS right now. (There's a first pass in my book, but it's not detailed enough, so I'll do the slides first and go back to update the chapter later.) It'll be posted on the Lecture Schedule page off http://coweb.cc.gatech.edu/cs2340/ this week -- before Tuesday. Mark -------------------------- Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280 (404) 894-5618 : Fax (404) 894-0673 : guzdial(a)cc.gatech.edu http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html

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Re: Mail system
by Lex Spoon 27 Feb '00

27 Feb '00

For such a thing to work, both the sender and receiver of a message need to be able to refer to the database. Further, the whole database needs to be available somewhere out on the network, just in case you refer to something that the receiver doesn't happen to still have locally. It starts to sound like a system where all email is stored in a central database, and your email reader just shows you a selected section of the database. Two difficulties. First, there is a security problem: people should only be able to read messages sent to themselves, messages they have sent, and (!) messages that are quoted in messages sent to them. Perhaps there are two quoting mechanisms: one which lets you see the whole original message, and one which doesn't. Anyway, with capabilities this is all pretty simple, actually --each message has a handle for read access, and each user can log in and get access to a mailbox containing handles for the messages they get direct access to. For quoting, you create new handles that refer to just a part of another message. After security, there is the practical problem that the database will grow larger over time--and someone has to pay for that disk space! So we want to account for how much space each user is taking up, but keeping these accounts up to date is an interesting problem by itself. Just how difficult accounting will be, seems to depend on whether you let people modify the database. Overall it seems feasible, and it sounds interesting, although it sure is complicated compared to the Internet's current scheme for email! Heck, by the time you have the above scheme, you have a lot of what you need for something like Xanadu.... Lex "Ken G. Brown" <kbrown(a)tnc.com> wrote: > Doug Engelbart in his Colloquium at Stanford, An In-Depth Look at > "The Unfinished > Revolution",<http://stanford-online.stanford.edu/engelbart/colloquium/index.html> > talks of the "Dynamic Knowledge Repository" as a place where > technology can be leveraged to improve mankind's *ability* to solve > complex problems. He talks of a system 'Augment/NLS' which has been > previously been implemented with extensive hyperlinking-style > facilities along with other features which allow far more powerful > ways of managing knowledge and information. > > It occurred to me that all these emails could benefit from a system > where instead of including the quoted sections over and over again, > the original email could be stored in a database (or DKR) and just be > pointed to in full or in part via a system of tags as they have done > in Augment/NLS. After all, I wonder how much of the 123 MBytes is > just duplication. > > What would be the feasibility of implementing such a system with > Celeste? Seems like a good database implementation would allow much > more efficient access. This could be extended outside the local email > domain to include bookmarks and notes relative to them from the net, > etc. too. > Ken > > At 3:33 PM -0800 on 2/22/00, John.Maloney(a)disney.com is rumored to > have written: > > >Yep, Steve Putz and I wrote Babar at Xerox PARC and it was used > >internally both at PARC and at ParcPlace Systems for a number of > >years. Celeste was a simple re-implementation of Babar that I wrote > >as a graduate student at the University of Washington. I ported it > >Squeak, and several other folks including Mike Rutenberg and > >Lex Spoon have added a number of important enhancements. > > > >I've currently got a 123 MBytes in my Celeste mail database, but this is > >quite a bit past the point at which Celeste works well! :-> > > > >I will probably break this into several mail archives by year. > >Celeste works quite nicely up to several thousand messages, however, > >and it's totally great to have a mail browser that you can modify. > >Most important, Celeste has been extremely reliable. New messages are > >always written by appending to the file, and in an emergency you can > >regenerate the message index file by scanning the message file. > >This is modeled on Squeak changes file logging; the goal is to > >be able to recover gracefully even from something as dramatic as > >a power failure while fetching your mail. > > > >Incidentally, I think it is best to think of any mail reader as > >a mail database--the most important goal is to retain and organize > >old messages so you can find what you want quickly. If you have > >this, then lots of experiments can be done with the user interface > >without risking the integrity of the mail itself. > > > > -- John > <>

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WinCE SH3 Bug? (was: Please help reading walkback (can't Squeak on CE))
by Francois Le Coguiec 27 Feb '00

27 Feb '00

Bob, Carl, Thanks for your great help! I will try your suggestions ASAP. (Unfortunately I am going to be away from any Squeaking device for 2 weeks, on my way to the airport for a business trip. Pfff I can't wait to be back) For the record: the problem happens every time I just simply start Squeak. The WinCE SH3 version as downloaded from Squeak.org. Since the same image works fine on my Windows desktop and I hear people have used it succesfully with other WinCE PDAs, I lean towards a VM bug on my platform (HP Jornada 690). Thanks again. -Francois- ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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