Squeak-dev November 2006

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157 participants
223 discussions

[OT] RedaForth
by Francisco Garau 07 Nov '06

07 Nov '06

Hi, Recently, a new open source Forth has been released the public domain. It is been used to teach children from poor areas, the fundamentals of programming. The system is tiny - the full distribution is a just 386kb zip file http://www.geocities.com/redaforth/reda4pc.zip I was mostly impressed by the vector graphics editor that it includes (image attached). It is used by the kids to draw their cartoon characters, but also to define the fonts used by the system. Cheers, Francisco --- That which we call a rose by another name would smell as sweet ---

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[ANN] FileMan on SqueakMap
by Masashi UMEZAWA 06 Nov '06

06 Nov '06

Hi, I've released FileMan on SqueakMap. http://map.squeak.org/package/f9917683-25da-4a6c-a013-b36527a100c1 Squeak's file libraries (Directory, DirectoryEntry, FileStream, etc.) are sometimes very confusing to use. FileMan provides a simple, refactored interfaces for manipulating files and directories by wrapping those classes. "Before" subDir := FileDirectory default directoryNamed: 'subDir'. subDir assureExistence. [str := subDir newFileNamed: 'file1'. str nextPutAll: 'Hello!'] ensure: [str close]. "After installation of FileMan" './subDir' asDirectoryEntry at: 'file2' put: 'Hello!'. Another example: "Copy all contents in ./doc to ./bkup/yymmdd (for daily backup)" './doc' asDirectoryEntry copyTo: './bkup' / Date today yyyymmdd. Features: - Path representation is portable (the example code runs on Windows, Mac, Linux). - Small package (consists of just two classes - FmDirectoryEntry, FmFileEntry) - Basic file operations - Dictionary-like operations - Pipe-like operations - Zip archive operations Enjoy! -- [:masashi | ^umezawa]

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don't forget about #squeak!
by Aaron Reichow 06 Nov '06

06 Nov '06

Hey folks! Just a little reminder about #squeak, the #squeak IRC channel over at irc.freenode.net. You can get to it using a regular IRC client, including the one built into Squeak. Or, you can get to it using the newly created page which contains a java irc applet: http://www.bitquabit.com/rev/squeakChat/ There are a lot of old-timers who think of IRC just as chat, and therefore automatically assume that it is nothing but a place where teenagers are annoying. While we are often pretty informal and social in #squeak and it often is a distraction from more productive Squeaking, we also have our fair share of worthwhile discussions. We have a good group of regulars (20-40 in channel at a time), and a mix of folks all along the spectrum from total newbie to seasoned guru, including folks like Craig, Goran, Ken Causey and many others. There has been a fair share of serious discussion, and a lot of project collaboration over the years. This email is also to announce that I finally put up a page with a java IRC applet. I figured it might help lower the barrier for getting onto the channel. That said, for those who read this, come on via the java applet and feel like becoming regulars, remember that there is an IRC client for Squeak as well as many other IRC clients that are a world better than this java applet. But, at least it's dead easy to use and doesn't require you to install anything, which makes it great for new users and when you're in a computer lab somewhere. the url again, just in case you are too lazy to scroll back up: http://www.bitquabit.com/rev/squeakChat/ (with many thanks to bmp!) Check us out sometime! Regards, Aaron revaaron(a)bitquabit.com || rev in #squeak on irc.freenode.net "Liberty will not descend to a people, a people must raise themselves to Liberty." -- Emma Goldman

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Daap implementation in Squeak
by Yann Monclair 06 Nov '06

06 Nov '06

Hello, I just started an implementation of the Digital Audio Access Protocol [1] in Squeak. This protocol is used by Apples iTunes [2] to share music over a lan. I found very little documentation[3] on this protocol, since Apple has decided not to disclose the documentation on its specifics. I have published the little code I wrote so far on SqueakSource [4]. I am stuck after the login request. As I understand it, iTunes doesn't send you the session-id, but an encrypted id, leaving you to decrypt it. Unfortunately, Apple added some byte switching or something to the classic MD5 encryption (I'm far from an expert in crypto, so I might not be using the appropriate vocabulary). I found a c library to connect to daap shares [5], but I didn't really get, even after looking at the code. I would appreciate any help to figure this session-id thing out :) I think having a daap implementation in Squeak, can be really useful for multimedia purposes, and we could probably find cool applications :p Here the code I write in a workspace to get a daapsession DaapSession connectTo: 'localhost'. this will return a DaapSession knowing the server, the content codes (typing info) and a DaapLogin. the encrytped session-id is accessible via DaapSession>>sid (or DaapLogin>>mlid) Thanks, Yann [1] http://en.wikipedia.org/wiki/Digital_Audio_Access_Protocol [2] http://www.apple.com/itunes/overview/ [3] http://tapjam.net/daap/ [4] http://www.squeaksource.com/daap.html [5] http://crazney.net/programs/itunes/authentication.html

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[Q] Safe way of removing class from system
by Sungjin Chun 06 Nov '06

06 Nov '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Is there safe way of removing class from system without making ObsoleteClass? What I found is check whether there're instances of the class and remove all methods, instance variables and class variables, and make its superclass as Object, then remove the class and if there's ObsoleteClass, then I use becomeForward: like this: anObsoleteClass becomeForward: Object. I'm not sure my way of removing is correct thing. Thanks in advance. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFTpInQqspS1+XJHgRAkQuAKCmF8MPtS6BQh2atFqdBP0wz0qAegCgrdYr u7IwxAul05pgY/v/38y2kC4= =aii4 -----END PGP SIGNATURE-----

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The Weekly Squeak Summary No. 5: Oct 29 - Nov 4, 2006
by Michael Haupt 06 Nov '06

06 Nov '06

Dear Squeakers, welcome to the The Weekly Squeak Summary, a weekly report on what's going on in the world of Squeak based on the Weekly Squeak blog. It's been a quiet week in terms of Squeak news items, but here are the week's highlights: Other than the traffic on Smalltalk-related mailing lists may suggest, Squeakers meet in the physical world as well. This week brought a report from the Smalltalk party in Bern [4], where numerous prominent Smalltalk/Squeak projects have been presented. Moreover, November's Squackers meeting was held on November 1st [3]. Two interviews with the creators of two outstanding Seaside applications - QTone and DabbleDB - give insights on their ideas and opinions [5]. Finally, more news from the VM corner of the world... the idea of providing the Strongtalk VM as a foundation for dynamic languages other than Smalltalk has been formulated. Quite naturally, the language of choice has been Ruby [6]. Last week's news items: [1] Wiki: migrations… http://weeklysqueak.wordpress.com/2006/11/03/wiki-migrations/ [2] Etoys documentation for teachers http://weeklysqueak.wordpress.com/2006/11/02/etoys-documentation-for-teache… [3] Squackers meeting - November http://weeklysqueak.wordpress.com/2006/11/01/squackers-meeting-november/ [4] Bern Smalltalk party writeup http://weeklysqueak.wordpress.com/2006/11/01/bern-smalltalk-party-writeup/ [5] Ocean Waves: the applications built on Seaside http://weeklysqueak.wordpress.com/2006/10/31/ocean-waves-the-applications-b… [6] Strongtalk VM for RUBY? http://weeklysqueak.wordpress.com/2006/10/30/strongtalk-vm-for-ruby/ You can find this and much more on The Weekly Squeak blog, the newsblog dedicated to the world of Squeak: http://news.squeak.org/ Subscribe to the Weekly Squeak RSS feed: http://news.squeak.org/feed/ Happy squeaking, Michael

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3.9 browser speed
by Andreas Raab 05 Nov '06

05 Nov '06

Hi Guys - I noticed that briefly yesterday but did some more investigation today and it turns out that the tools in 3.9 have become *really* slow. And it's not just because of the TTF caching. I turned off TTFs completely and noticed that things were still slow and then I devised a little benchmark: win := Browser openBrowser topView. win extent: 600@350. br := win model. br systemCategoryListIndex: 1. World doOneCycle. Transcript cr; show: [1 to: 10 do:[:i| br classListIndex: i. World doOneCycle. ]] timeToRun. The interesting thing about this benchmark is that you can run it multiple times to "increase the load" by having more browsers on the screen. I only noticed this accidentally but it turns out to be the relevant part. In 3.8 the above results in a sequence of Run 1: 598 msecs Run 2: 630 msecs Run 3: 683 msecs Run 4: 689 msecs So there is a little bit of slowdown when you add more browsers which is what I would expect (due to rounded corners triggering some extra overdraw, the additional structure etc). In 3.9 however, we get the following: Run 1: 883 msecs Run 2: 1311 msecs Run 3: 1632 msecs Run 4: 2006 msecs After four runs, we need 2.5 times as long as the first run. Something is causing a tremendous overhead for any additional browser on the screen. This matches my experience though originally I had attributed that to the TTF problems but it seems the issue is way deeper than that. Any ideas what was changed in 3.9 that could cause that slowdown? Cheers, - Andreas

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SqueakSource is down
by Damien Cassou 05 Nov '06

05 Nov '06

Can't access www.squeaksource.com anymore.

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Re: [ANN] SmallDEVS
by Ken G. Brown 05 Nov '06

05 Nov '06

I see .avi format videos at <http://www.fit.vutbr.cz/~janousek/SmallDEVS>. If you install Flip4Mac WMV components <http://www.flip4mac.com/> and enable it from System Preferences after you install, the videos get displayed with Quicktime ok. Ken >Message: 21 >Date: Fri, 03 Nov 2006 23:24:57 +0100 >From: Serge Stinckwich <Serge.Stinckwich(a)info.unicaen.fr> >Subject: Re: [ANN] SmallDEVS >To: squeak-dev(a)lists.squeakfoundation.org > >I try to look at the videos, but the codec is not supported under mac OS >X ... > >-- oooo >Dr. Serge Stinckwich OOOOOOOO >UniversitÈ de Caen>CNRS UMR 6072>GREYC>MAD OOESUGOO >http://purl.org/net/SergeStinckwich oooooo >Smalltalkers do: [:it | All with: Class, (And love: it)] \ / > ##

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Re: Games with Squeak
by Bill Schwab 05 Nov '06

05 Nov '06

Micke: Just a few random comments: Re the swiki, the user name and password are something like squeak/viewpoints; when I last checked, they exist to keep vandals out, not regular readers of this list. A quick search should help if the preceding pair does not work. Croquet indeed appears to be the current direction for 3D in Squeak. Ideally, I would hope to see its retained mode (drawing objects instead of merely triangles) engine factored for use in Squeak. It is possible that it won't matter, but I still think it would offer flexibility for both Croquet and Squeak. I had some reasonably intense 3D graphics running in Wonderland under programmatic control with the camera controls suppressed, but a bug fix (IIRC for the class builder) more or less killed it. With a steady population of objects, it runs quite well, but after the fix, creating new objects causes disruptive delays. That aside, the Alice description of objects is designed for end users, so I was constantly translating from jargon to layman's language to get it to work. Alice is very powerful, just not quite in the way one might want. Croquet's approach to 3D seemed to be much more direct. Bill Wilhelm K. Schwab, Ph.D. University of Florida Department of Anesthesiology PO Box 100254 Gainesville, FL 32610-0254 Email: bills(a)anest4.anest.ufl.edu Tel: (352) 846-1285 FAX: (352) 392-7029

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