Squeak-dev June 2001

squeak-dev@lists.squeakfoundation.org

122 participants
362 discussions

Bouyancy project on BSS
by Jerry Bell 26 Jun '01

26 Jun '01

Hi, There is a project on BSS (Bouyancy) that I'd like to play with, but it requires a BouyancyAtom class that's not included with the project. Would someone be willing to send me the classes to make this example work? Thanks! Jerry Bell jdbell(a)fareselaw.com

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Invitation
by Kenneth Fields 26 Jun '01

26 Jun '01

Discourse mapper: a metadiscourse question. I am hoping there are some metalanguage experts on this list! The problem is to describe professional/academic discourse units in object oriented terms (classes, attributes, services). The language I would like to ultimately express this in is UML (unified modeling language). This is an opportunity for me to learn more about object oriented analysis and discourse analysis. What is the proper term for discourse analysis at this most general level of societal conversation? It is not called discipline analysis, because disciplines contain overlapping discourse. One important object in the problem domain would be professional/academic associations - who hold conferences - who discuss the cutting edge of their field - who work on collaborative projects - who have an important archive of information regarding their field - who have important journals, listservs... The question: what are the important classes (objects) at this general level of discourse, what are those classes attributes, what actions can they perform, what are their responsibilities, what knowledge do they contain. The Interdis community would be an exceptional case study as our discourse is about discourse. One class would be <<organization>>, another class would be daily conversation on the <<Listserv>>; the org has a <<name>>: AIS; the org knows <<members>>, the Listserv talks about many <<topics>>... The model and interface will be done in Squeak. I have set up a temp listserv at topica.com because I am inviting a number of discourses into the parlor. send an email to: ooDiscourse-subscribe(a)topica.com Don't be put off by the topica.com registration... it has proven to be no problem in the past for me - quite a good way to set up a limited term conversation - just how limited that term may be, we will see. Thanks, Kenneth Fields Ph.D. Media Arts and Technology Institute of Human Computer Interaction and Media Integration Department of Computer Science Tsinghua University Beijing, China 100084 ken(a)tsinghua.edu.cn ken(a)create.ucsb.edu http://www.create.ucsb.edu/ken (86 10) 8316 1363

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Reminder: Ottawa Smalltalk User Group meeting June 28
by David Buck 26 Jun '01

26 Jun '01

The Ottawa Smalltalk Users Group (in Ottawa, Ontario, Canada) will be having a meeting on June 28, 2001: Designing 3D Game Worlds in Smalltalk Anthony Lander Learning Dimensions Learning Dimensions uses Smalltalk to design worlds for 3D video games. Anthony's talk will look at various aspects of 3D video game design. The talk begins with an overview of the game development pipeline, then looks at some 3D algorithms, and overall design strategies. June 28, 2001 7:00 PM Export Development Corporation 151 O'Connor St. Ottawa Meet in the lobby by 6:45 Please RSVP to david(a)simberon.com if you intend to attend so that we can get an idea of the number of people who will be attending.

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Very large amount of Objects
by Diego Gomez Deck 26 Jun '01

26 Jun '01

What´s the best way to store about 1 million objects in Squeak?? I tried ReferenceStream but seems too slow.... TIA, Diego Gomez Deck

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[updates] 9 more for 3.1alpha
by Dan Ingalls 26 Jun '01

26 Jun '01

-- Folks - I have just forwarded another 9 updates to the servers for 3.1a. Enjoy - Dan ------------------------- 4165lsbTexFix-ar -- Andreas Raab -- 14 June 2001 Fixes texture uploads in accelerated B3D" 4166HandCaching-ar -- Andreas Raab -- 23 June 2001 This change set changes the strategy for figuring out if morphs which are held in the hand can be cached or not. Rather than asking each and every morph about whether it has some translucent color the new strategy takes into account that most translucent morphs will be backed by some opaque morph. An example is the current use of the optional button pane which is constructed using a transparent holder embedded in an opaque system window. Before these changes any window containing such a construction was not cached - now it is." 4167TruncateFile-JMM -- johnmci(a)smalltalkconsulting.com -- 24 May 2001 Add logic to support truncating of an open file" 4168GenieDictRelocation-ar -- Andreas Raab -- 24 June 2001 Relocate the gesture dictionary from the event handler to the other properties. The gesture dictionary is in no way involved in event handling and heavily complicates various future reformulations." 4169scamperStart-ls -- Lex Spoon -- 17 June 2001 Make Scamper start at local start page, instead of instantly downloading something." 4170dbLessCeleste-ls -- Lex Spoon -- 21 June 2001 Allow Celeste to run without a database open. Such an empty Celeste would be well suited for the Tools flap...." 4171scamperCeleste-sw -- Scott Wallace -- 25 June 2001 Put a Scamper web browser and a Celeste email tool into the tools flap. This became possible thanks to Lex Spoon's recent scamperStart and dbLessCeleste updates that allow Scamper to start up with a default local url and Celeste to survive even if there is no mail data base yet established." 4172magnified-sw -- Scott Wallace -- 25 June 2001 Fixes a condition once seen in MagnifierMorph initialization, which could halt the creation of a 'Widgets' flap. Makes Magnifiers launched from the Widgets flap be named 'Magnifier' rather than 'Screening'" 4173MIExtras2-tk

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RE: Squeakland plugin doesn't work with latest IE6 beta?
by Noel J. Bergman 26 Jun '01

26 Jun '01

Are you talking about IE6 for Windows? I am running 6.00.2462.0000, and Squeakland appears to be working just fine for me. --- Noel -----Original Message----- From: Andreas Raab [mailto:Andreas.Raab@gmx.de] Sent: Monday, June 25, 2001 20:58 To: squeak(a)cs.uiuc.edu Subject: RE: Squeakland plugin doesn't work with latest IE6 beta? Well it seems as if IE6 (which I just installed) doesn't support *any* Netscape style plugins. Or did you have any success with, e.g., QT in IE6? Makes me wonder if that's deliberate or not... Cheers, - Andreas > -----Original Message----- > From: John Kozak [mailto:jk@xylema.org] > Sent: Sunday, June 24, 2001 4:45 AM > To: squeak(a)cs.uiuc.edu > Subject: Squeakland plugin doesn't work with latest IE6 beta? > > > subject says it all really: it's IE version 6.0.2479.0006, and the > plugin doesn't seem to connect to it at all... > > John > >

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Re: Undoing changes
by Richard A. O'Keefe 26 Jun '01

26 Jun '01

"look like Dot" is indeed a problem which should be fixed. What's the best way to do it? A new tile "lookLikeMySelf"? I suppose "takeOffClothes" isn't great for little kids :), but takeOffCostume might be okay. Why use three words when two (removeCostume) will do? More generally, wearPreviousCostume "Don the next costume in the history and add the current one to the history. Repeating this will cycle through all the costumes that have been used." costumes addLast: costume. ^self renderedCostume: costumes removeFirst. I _think_ this works, but I don't begin to understand Players, so there is bound to be something wrong with it.

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Re: [BUG][FIX] ifError: error blocks are often incorrect
by Lex Spoon 25 Jun '01

25 Jun '01

mdr(a)scn.org (Mike Rutenberg) wrote: > In 5 methods, people have coded natural but incorrect exception > handling of the form > [normalExpression] ifError: [errorResultExpression] > The allowed form is presently only: > [normalExpression] ifError: [ :err :rcvr | errorResultExpression] > > For, example, > ImageSegment>>copyFromRoots:sizeHint:areUnique: > has the incorrect expression > [outPointerArray _ Array new: segSize // 20] ifError: [ > state _ #tooBig. ^ self]. > > Since the error block is not checked for the right number of arguments, > this mistake will remain dormant until the error exception is actually > taken. A debugger will appear complaining that the block is being > evaluated with the wrong number of arguments. > IMHO, the much bigger problem is that there is code in the image that has never been run! Statement coverage will always flush out this error, and statement coverage is a pretty minimal level of testing. That said, I don't *mind* if ifError: does the check. -Lex

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[ANN]Coming soon: SqueakNews en espanol y El Problema Squeak de Junio
by Editor - Squeak News 25 Jun '01

25 Jun '01

Just a quick note to let you know that SqueakNews will also be published in Spanish, and upon request: here is this month's question in Spanish: En la revista electrónica Squeak Noticias todos los meses vamos a plantear un problema; las respuestas seleccionadas aparecerán publicadas en nuestro sitio. El autor de la respuesta que resulte "elegida por el editor" ganará un regalo sorpresa. Nos gustaría poder publicar las preguntas en esta lista. La pregunta de este mes es un caso que realmente sucedió, aquí va: Justo antes de salir en viaje de negocios, un Squeaker encontró que su casa había sido violada y que los intrusos habían escapado minutos antes sin alcanzar a tocar nada. Estaba furioso pero tenía que volver a dejar la casa sola a causa de su viaje. Tenía por ahí una pequeña alarma portátil y una conexión permanente por cable a Internet. Antes de irse, conectó y activó la alarma y escribió unas 15 líneas de código Squeak que determinarían si la alarma se desconectaba y enviarían un email indicando que la alarma se había disparado. En tan poco tiempo no tenía manera de conectar físicamente la alarma portátil a su computadora. El aviso tenía que ser razonablemente rápido y preciso de manera tal que los intrusos no tuviesen tiempo de desconectar la alarma antes de que él fuese notificado y pudiese llamar a la policía o pedirle a algún amigo que fuera hasta su casa a ver qué ocurría. También quiso "escuchar los latidos" de su computadora por email cada 10 minutos, de modo de poder saber si su computadora seguía con vida (piense que eso produce un gran número de emails diarios). En los 15 minutos que le quedaban antes de partir pudo disponer todo, probarlo e incluso imprimir unas etiquetas de advertencia para los intrusos. ¿Puede adivinar qué hizo y cómo lo hizo? PD: La aplicación le resultó de tanta utilidad que todavía la usa cuando tiene que salir de su casa. Más tarde modificó ligeramente el código para aumentar la frecuencia de los latidos y envió los emails a una cuenta de correo especial. Luego escribió otra aplicación para que su laptop chequeara esa cuenta especial de correo una vez por minuto y le avisara si se detenían los latidos o si la alarma se había activado. También extendió esta utilidad para verificar su sitio de web y enterarse si el sitio se caía; ahora sueña con conectar una webcam y fotografiar a los intrusos. Pero esa es otra historia; usted no necesita hacer esta parte, claro que si le gusta el desafío nadie va a impedírselo. Por favor, envíen sus respuestas con los fragmentos de código directamente a <editor(a)squeaknoticias.com> y no a esta lista. Para que podamos incluirlas en el número de Julio, las respuestas deben llegarnos antes del 27 de Junio. Disculpen el apuro, el mes próximo tendremos más tiempo. Tansel Editor, Squeak News http://www.squeaknews.com

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unscribe
by Ken Perry 25 Jun '01

25 Jun '01

I've enjoyed the mail list but no longer have time to keep up with it. Thanks, Ken

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