OOPSLA 2003 Trip report Squeak BOF

Missed start of Dan's talk about his weather station hardware/software. Certainly if you are looking for a high end visual local weather display for your house, ski resort, golf club, TV station, yacht club then look no further.

Cost about $220 with power supply cost for one board is about $120 can add lead acid battery and get 4-5 hours UPS support. People using mini-ATX boards are hobbyists, lots of activity in this area A year or more back, very few choices, now it changes weekly.

Ned's Talk

{Sorry had to prepare my talk well Ned was talking, but people who use tablet PCs and want way better pen interaction should see Ned's work}

Takashi Yamamiya Talk Language Game & Skeleton

{Well this is hard to talk about. As an artist he makes machines that make music and a lot more. Like a large wooden machine/bicycle that generates fibonacci numbers! Really quite amazing}

From his slides. "I love machines and I made a computer as the greatest computer in our day

But I noticed something missing, the essence of computer is not in hardware, it's in software"

So he has been inventing games in Squeak

But using BNF grammer to build music scores and games, then animation and bouncing Morphs and parse trees. {When was the last time you saw a BNF parse tree dance?}

Ah, it's too hard to explain, really words fail me.

Skeleton A constraint system paper scissors rock. game

One game has dancing man and woman stick figures using skeleton constraint rules and Interaction with space and music volume. Feedback loop isn't perfect so animation is well cartoonish which fits just fine into the animation. Did he interact with all this I think he did we were just boggled by the presentation.

Someone have a link to his work? http://csdl.computer.org/comp/proceedings/c5/2003/1975/00/19750110abs.htm http://www.dnp.co.jp/museum/nmp/nmp_i/articles/kirin.html

Croquet Covered before.

Tweak II Looks like Morphic, and mostly taken from there. The important change is in the scripting part. It looks more like a Smalltalk browser, but that is outdated now, but just gives you an impression. How we take the etoy scripts out and show them using a smalltalk syntax, this will change. The target is older children, young adults and novice programmers, versus the professionals.

{Ack Hardware problems}

Ok, back Now let's talk about Monticello Old tools, envy ginsu, Also cvs needed to have these tools to do collaborative development.

Example got a class, change a method. Do the save. off another image and visit the repository, open it, we can see the new version Now we can load it from the tool. Issue it conflicts with my version. Tool allow merging, then saving yet another version v4. This version knows it was merged from v2 and v3 repository can be to SMTP, directory, HTTP or FTP Also I'm sure he mentioned Omnibase By allowing SMTP you can load into a repository and manipulate and re-distribute. We are running quite a few repositories usually read only. Simple then to collaborate. Thus you can do offline work, then later publish to the server. Since you can move repository trees you move that historical data around. We would like to use Ned's connectors to plot the tree.

Question can you do preambles/postambles No not yet.

Ned: Packaging and distributing issues, been using the SAR format so I can stick in any format of Squeak artifacts, projects changesets, etc etc Then a simple load script to load and fiddle with things.

? want to make Monticello to be a versioning system, not a packaging system.

{Details}

Yoshiki Ohshima Squeak in Japan, m17n and more

Showed some hardware, 600x800 VGA display size of paperback folded over keyboard. Bigger proportion of Mac users since its origin Early m17n work in 1999 and Camp Smalltalk workshop in mar 2002 TV program features Alan in April 2002 A lot of tryout after the TV show Kyoto project 2003 books, lectures, IPA projects etc Squeak-ja mailing list has > 250 members

Advanced LeArning Network in Kyoto (ALAN-K Project) started in 2002 a three year project

Squeak book in Japan hit #1 two weeks in a row, sold 4-5 thousand copies. Does m17n work? Used by hundreds of or thousands of people. works with 3.6 works with croquet 3.6, Seaside, Postres, etc Various Translation work and idea's (Diego's Andreas' Ned's

Applications->natural language translation->m17n infrastructure

Gave an example of getting the <- in unicode.

The changes gets convert to UTF-8 additional info for CJKV. X-CTEXT (ISO-2022), EUC (-JP,-KR-CN) shift JIS Platform specific keyboard interpreters cliepInterpreters are used.

SqueakLand e-toys Last months 8 thousand hits. 2000 download a month. e-toys most important tool in Squeak in the School industry Really*** big in Japan now. Notes about Squeakers DVD

Traits You seen this before but I'll continue writing.

Create a class circle Now I've a trait called TCircle, like area, bounds, etc. etc requires center and radius Back to circle class and setup to say it uses TCircle Now in blue it notes I'm missing two required methods center and radius. show I've no class methods, but I can see the TCircle methods. So to the required category and we specify the center and radius methods (getters and setters) Note that I could specify shouldNotImplement as a method here, like we do for the center setter and the center getter is a constant point. So circle new and ask for the area. See how the Trait has given me the code Now lets add TDrawing trait One requirment bounds is there already and supported drawOn: isn't there so we add code to draw on the world canvas. Then create the circle and do the draw.

back to the circle class, lets create an initalize-release category and do the initialization, then on the class class side setup the new method to do the initialize. In looking back we've only implemented initialize, all the rest comes from Traits. Now add TColor Need the rgb value, setup the accessors/mutators. fix up the initialize do the draw, we get a red circle

Now add a TBorder trait add it to the class Ah now there the overridden methods, like drawon, which is overridden by Circle Ok let's add an alias, that makes the TBorder drawon called borderDrawon. need to add that to the drawon Now for requires borderBounds we decide the border should be bigger. so the bound should be the border width added to the circle.

back to the class definition and you'll see the grammer specifics the traits plus the deleted methods.

Ted

Trait seem to be protocols? Small a few in a trait, lots of traits in a class (say 22)

Yes that is more complicated, need to fiddle with the browser.

Lots of positive comments.

Onward to OOPSLA 2003 Trip report Wednesday