Squeak-dev August 2009

squeak-dev@lists.squeakfoundation.org

114 participants
300 discussions

Wiki
by richard snow 05 Aug '09

05 Aug '09

http://mypals.info/tikiwiki-2.1/tiki-index.php?page=SqueakForAlpha Sorry forgot to paste the link. I'm getting tired lol. rss -- http://mypals.info

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My Squeak for Alpha wiki page updated....
by richard snow 05 Aug '09

05 Aug '09

I've included the two relevant squeak-dev threads into the Wiki. rss -- http://mypals.info

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Trunk
by Alexander Lazarević 05 Aug '09

05 Aug '09

Hi, with the latest updates to the trunk it seems one can not just quit the image any more. MenuMorph class(Object)>>doesNotUnderstand: #chooseFrom:title: MenuMorph class>>confirm:orCancel: MorphicUIManager>>confirm:orCancel: TheWorldMenu(Object)>>confirm:orCancel: Regards, Alex

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Preference Pragmas redux
by Andreas Raab 05 Aug '09

05 Aug '09

Folks - I've just pushed a version of preference pragmas into the trunk. With preference pragmas, you no longer need to litter Preferences with loose methods that confuse Monticello and don't get uninstalled. With preference pragmas, you define your preferences locally (for example as class variables) and provide an annotation that can be discovered automatically. A sample preference looks like here: MyClass>>samplePref <preference: 'Sample Preference' category: 'My Application' description: 'A sample preference in my application' type: #Boolean> ^SamplePref The following types of preferences are currently supported: #Boolean, #String, #Number, and #Color. When a preference is changed, the accompanying setter method is called. Preference pragmas will help us get rid of most of the dependencies between Preferences and the rest of the world. New preference browsers or entire implementations can easily be written without introducing unnecessary dependencies by virtue of discovering the annotation. Cheers, - Andreas

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can anyone justify the following comment behaviour?
by Eliot Miranda 05 Aug '09

05 Aug '09

Hi All, in ParseNode>>printCommentOn: there is the most perplexing destructive modification of a comment on printing: printCommentOn: aStream indent: indent | thisComment | self comment == nil ifTrue: [^ self]. 1 to: self comment size do: [:index | index > 1 ifTrue: [aStream crtab: indent]. aStream nextPut: $". thisComment *:=* self comment at: index. self printSingleComment: thisComment on: aStream indent: indent. aStream nextPut: $"]. *!!* self comment: nil The result is that a parse tree can only be printed once before it prints without comments. Can anyone justify this? I would like to remove it; it makes no sense to me. best Eliot

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want to get squeak running on Gentoo Alpha architecture (compaq es-40)
by richard snow 05 Aug '09

05 Aug '09

I tried to build the sources and ran into a couple problems. first it was trying to use decgcc. Fixed that in the configure script. SqMain.c (i think) was trying to include sys/proc.h and I don't have that file. -- http://mypals.info

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Squeakfest USA schedule
by Rita Freudenberg 04 Aug '09

04 Aug '09

Hi everyone, the schedule for Squeakfest USA is now online! Have a look at it here: http://squeakland.org/squeakfest/usa/schedule/ Registration is still open here: http://squeakland.org/squeakfest/usa/register/ Rita Freudenberg rita(a)squeakland.org

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Computer on a stick
by Gary Dunn 04 Aug '09

04 Aug '09

On Sun, 2 Aug 2009 10:46:52 K. K. Subramaniam wrote: > Hi, > > It has been a long time since we had a thread on Dynabook vision and Squeak > hardware, so I thought I will revive it again with a new twist. > > We normally think of computer as a big machine into which we stick in > Etoys2Go sticks to work. Why not reverse the design? How about a Etoys > console into which we stick a computer strip like gumstix? If an object > was conceived as a composable computer why not push it all the way down and > *out*? > > Build a dumb machine with storage and console into which we stick a > cartridge containing processor(s), memory and network. For a student, the > most precious records are in storage and the look-n-feel is in the console > (keyboard,video,mouse or trackpad). Digital data has a much longer life > than a processor, RAM or network technology. The specific instruction set, > memory or networking technology is increasingly irrelevant for personal > computing needs. One does not have to change their whole console just to > get to upgrade processor, RAM or wifi. We can get off the forced upgrade > treadmill. > > Are there any consoles that work like this? > > Subbu What you describe is not so far off from the central hardware piece of the Open Slate Project. Back when I started OSP, computers were relegated to labs and consumed all available desk space. Being an avid Newton fan I wanted every student to carry around a Message Pad type device which they could use in every class. This evolved into a self-made slate PC with FOSS OS. Lately my thinking is to make Squeak the UI. The difference between your concept and mine is that an OSP slate will have a display and pen interface. It too can be expanded using USB keyboard and mouse, and large monitor. -- Gary Dunn, Honolulu osp(a)aloha.com http://openslate.net/ http://e9erust.blogspot.com/ Sent from a Newton 2100 via Mail V

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Re: [squeak-dev] Re: [etoys-dev] Installing Etoys and Squeak on
by osp＠aloha.com 04 Aug '09

04 Aug '09

> On 04.08.2009, at 21:51, David Corking wrote: > > > Bert Freudenberg wrote: > > > >> Only if someone can think of a way to reliably detect the problem. > > ... > >> (PulseAudio) is what appears to break Squeak sound, because it works > >> fine on "real ALSA" but breaks on "emulated ALSA". > > > > Oh, I had hoped the workaround would be an effective fallback for > > everyone on Debian derivatives. I bet the lack of native ALSA is far > > from trivial to detect in a shell script :( > > Yes, but detecting active pulseaudio is simpler. See my comment on > > http://tracker.squeakland.org/browse/SQ-214 > > >> OSS is obsolete. It's not supported out-of-the-box on most modern > >> Linux > >> distros anymore. If at all, it is provided by an emulation layer like > >> alsa-oss which adds considerable delay. We would get Squeak talking > >> to OSS > >> talking to emulated ALSA talking to PulseAudio talking to real > >> ALSA. No > >> wonder there is delay in that. > > > > I haven't done any testing - is the delay noticeable? > > We tried it in SoaS on an Intel Classmate in Mexico today. First using > the alsa-oss wrapper which had an awful delay. Then using the padsp > wrapper, much better, but still with a slight delay. > > > The OSS API > > (via emulation layers) is not obsolete, and OSS is still the standard > > on BSD. > > You are right - but since in many Linux distros it is not pre- > installed anymore (not even the emulation wrapper) we cannot rely on > it. Likewise, it is not on the OLPC XO (which actually prompted doing > the ALSA driver). > > > 10 years ago, ALSA was the next big thing. Now, ALSA is fading away, > > and OSS and /dev/dsp , with all their flaws, are still here. > > ALSA seems to still be the low-level interface of choice. It's just > that PulseAudio is trying to virtualize it, breaking some code. > > >> Here is an overview of the various Linux sound APIs: > >> > >> http://0pointer.de/blog/projects/guide-to-sound-apis.html > > > > (great guide - thanks - and the author admits his bias too! I also > > enjoyed the linked article: http://lwn.net/Articles/299211/ and > > comments) > > > > Given that so many distros have already gone to PulseAudio, Lennart > > makes a pretty convincing case for the Linux VM to move towards a > > "PulseAudio-safe" subset of the ALSA API. Thanks for your patience > > with me. > > > Well, the code is here if you want to try: > > http://squeakvm.org/svn/squeak/trunk/platforms/unix/vm-sound-ALSA/sqUnixSou… > > - Bert - On my FreeBSD desktop Dell GX280 running FreeBSD 7.1, I get a 0.5 sec delay between clicking on a key on the piano keyboard and the start of sound event. Just good enough for toy, much too long for anything serious. Doesn't sound like a piano, either, more like a pipe organ set to reed pipes. Although FreeBSD uses the OSS API, most the the code has been replaced with better stuff. Definitly NOT obsolete. Other APIs are layered on top of this, which adds delays. Two small related items: "Pulseaudio doesn't work !" http://lists.freebsd.org/pipermail/freebsd-multimedia/2007-July/007194.html "FreeBSD's sound system lineage...." http://forums.freebsd.org/archive/index.php/t-2613.html Gary Dunn Open Slate

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Squeakfest Brasil report
by Bert Freudenberg 04 Aug '09

04 Aug '09

Forwarding a message from Marta, member of Squeakland's education team, who organized an awesome Squeakfest in Porto Alegre last week. - Bert - ------------------------------ From: "Marta Voelcker" <marta(a)pensamentodigital.org.br> Date: 3. August 2009 00:45:30 MESZ To: <squeakland(a)squeakland.org> Subject: [squeakland] Hello from Porto Alegre Hello, I would like to thank the Etoys team that came to Porto Alegre and have joined us at Squeakfest Brasil and World Conference on Computers in Education www.wcee2009.org From July 23 to 25th we had around 300 people attending Sqeuakfest Brasil at UFRGS Porto Alegre. The conference was held in an auditorium for 250 people and 3 rooms ( located near the auditorium) each room with 20 laptops each. Hands on workshops on these rooms were always crowded. Colleagues from our local research group, Teachers from Uruguay, Kathleen Harness, Kathleen Smith and Avigail Snir ( from Etoys Illinois) and Randall Caton and children form Luciana de Abreu School, have conducted hands on workshops. One of the rooms had focus for developers ( since most attendees were educators), there Yoshiki, Scott Wallace, Alex Warth, Bert and Rita Freudenberg, plus Gonzalo Sabala ( Argentina) and Jecel ( Brasil) conducted activities for developers or activities related to robotics. On the main room there was several kinds of presentations, from a PhD Thesis (Edson Lindner) to high school student sharing their experiences. Local reports like Sdenka Salas Pilco from Peru, and many friends from Uruguay where great! Lea Fagundes pleased us with a great presentation “Why powerful ideas?” and ended the conference with many plans to disseminate the one to one modality among the more than 20 municipalities attending the conference. The Squeakfest had a great and friendly atmosphere. This was the first time that I organized a conference like this, I could be nervous, but I had the constant feeling that I was among friends! I look forward to lead the organization of the second Squeakfest Brasil for July 2010! From July 27th to 31st I, Tim, Rita, Bert, Scott, Yoshiki, Alex Warth, Kathleen Harness, Kathleen Smith, Avigail Snir attended WCCE in Bento Gonçalves, a city near Porto Alegre. There, we have interacted with many other researchers and students working in different areas on ICT for Education. We conducted a Workshop and a Panel about Squeak Etoys. Well, two weeks ago few people in Brasil new about squeak etoys. Now we end the week with a new mailing list America-latina(a)squeakland.org with more than 230 participants and many plans for this new local community, for that and for your friendship and support I want to say thank you for all those that came to Proto Alegre, and for those that couldn´t come, you can start planning for 2010 J, cause we are certainly going to gather again! Kind regards and a I wish you a great Squeakfest in Los Angeles, Marta _______________________________________________ squeakland mailing list squeakland(a)squeakland.org http://lists.squeakland.org/mailman/listinfo/squeakland

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