Squeak-dev March 2005

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Re: Yahoo!
by Cg 11 Jun '05

11 Jun '05

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Where are system globals (Smalltalk and SystemOrganization)
by Aaron Gray 01 Jun '05

01 Jun '05

Are Smalltalk and SystemOrganization "global variables". If so where are the system globals and how do I list them, within a browser and say to the Transaction window from the workspace ? Aaron

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Improving Squeak's Multimedia - Part 2
by Brad Fuller 08 May '05

08 May '05

Hi All, Fantastic, we have several people who are interested and I hope willing to play a part in improving Squeak's Multimedia capabilities: Blake (Blake: what's your last name?) Dean Swan Craig Latta Russell Penney Steve Elkins Martin Kuball Yoshiki Ohshima Mark McCahill Juan Vuletich Cornelius Huber Brad Fuller I hope I didn't misspell or miss someone. If so, apologies. Let me start off the discussion by asking some hi-level questions. And, by all means, please chime in. I present only one slanted POV --- your views will be valuable to provide a robust analysis of the situation. === Multimedia Definition Maybe the first order of business is to achieve agreement on what we mean by "Multimedia". I looked it up after Martin's email and he's right - multimedia includes a variety of media such as the real-time areas (e.g. film/video, music) as well as static media (e.g. text, graphics.) Russell provided another interesting POV that containers could hold a multitude of multimedia assets. and that these basic frameworks could provide easy re-use. My 2cents: I was only thinking of "real-time" assets such as audio, music, video, etc. What are your thoughts on the definition of Multimedia? === Hi Level Interests? Furthermore, our definition of Multimedia may be a clear superset of what we want to tackle. For instance, it might turn out that we have just enough hands, or interest, to look at the audio classes; or maybe just video; or maybe the majority is only interested in adding MPEG4 to Squeak. For me, I'm obviously interested in only audio and video. I know this is broad, but I just want to get the top level issues out of the way. As an example of elimination, I am not interested in graphics or text. What are your interests? ==== Attack Plan Finally, I propose that we decide on what to tackle and how to do it. From a bird's eye view, we might look at 3 distinct phases (not necessarily linear in order - can be approached simultaneously): * Review/Discuss/Plan/Fix existing classes (which hopefully fix existing tools/apps) * Discuss-Design/Plan/Enhance existing classes * Discuss-Design/Plan/Add new capabilities: new classes, tools and end-user applications. (That's a lot, right there.) I'm willing to put in time, at the very least, toward fixing and enhancing the audio/music side of MM. I'm also interested in helping to test and use any video functionality - especially audio-video synchronization issues. Lastly, I would like to begin discussing new real-time capabilities for Squeak -- sort of plan while we get the house in order (the discussions might circumvent fixes, who knows.) What areas interest you? And, are you interested in helping? ===== Is This A Team? Finally, Finally, In light of the current squeak-dev traffic: Does this look like a team to propose? It seems orthogonal to the team proposals from the castaways. What do you think about MM as a team? Is it a sub-team? How does the rest of the Squeak community feel? brad BTW: Are there any related on-going projects that should be incorporated?

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[ANN] Kedama version 2.0
by Yoshiki Ohshima 03 May '05

03 May '05

Hello, I've been working on a parallel particle programming system called Kedama. The last version wasn't quite good enough to announce, but I feel this version is a bit better. Kedama is deeply inspired by StarLogo and StarSqueak. In Kedama, you can control thousands of objects with eToy-like tile scripts. Please take a look at: http://www.is.titech.ac.jp/~ohshima/squeak/kedama2/ and give it a try. Thank you! -- Yoshiki

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[ANN] OSC for Squeak
by Markus Gaelli 17 Apr '05

17 Apr '05

Hi folks, besides the client I also implemented now most of the server functionality for OSC in Squeak, a fancy and free Smalltalk Environment with lots of cool people and developments, definitely interesting also for you arty guys on osc-dev. Check out for example http://www.opencroquet.org 1.) Doc This version is for Smalltalk-Developers. If I come around I like to create an EToyish Interface (see: http://www.squeakland.org) for it. For now you have to fire up a squeak image, then open SqueakMap Package Loader -> OSC, then program Smalltalk... 1.)a OSC-Client: (OSCMessage for: {'/foo' . 1000 . -1 . 'hello' . 1.234 . 5.678}) sendTo: '10.0.1.2' port: 5017 1.) b OSC-Server: (OSCServer listenOnPort: yourPort) inspect Have a look in the messageQueue of the server, you can get the next message from there via nextOrNil (it is a SharedQueue) See also the tests. 2.) Limitations: - Blobs are not passed yet, also no support for bundles yet. - One test is not running due to bizarre floating point arithmetic: #('/foo' 1000 -1 'hello' 1.233999967575073 5.67799997329712) is certainly not #('/foo' 1000 -1 'hello' 1.234 5.678) Hope nobody needs too precise floats... Cheers, Markus

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Squeak-3.7b audio recording issue on FC3
by Brad Fuller 12 Apr '05

12 Apr '05

Hi All, I'm running the following: FC3 kernel: 2.6.10-2.1.11.rhfc3.ccrma Alsa driver 1.0.8-1.rhfc3.ccrma Squeak VM 3.7b from the hp dnl site (the Intel x86 Linux rpm) Squeak3.7.5958-full.image clean Both Alsa and the OSS emulation work fine with other applications (such as ardour and mplayer using it's OSS interface). I haven't seen any problems with them so far. In Squeak, audio plays fine. But, when I start up squeak, go to the Widgets flap, drag out a "Sound" morph and push record, squeak hangs. Its repeatable every time. Any idea why? I'm thinking back thru my memory and I can't remember if this has happened before... but it may have. I searched thru Mantis and found nothing but one audio bug that was a playback bug. Anybody else running Linux with 3,7? If you are, can you try this and see if you get the same result? Any ideas? I'll keep searching the archives... and dig more into this bug on 3.7. Just wanted to see if anyone has seen this issue before I go searching too far. thanks, brad

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6293LowSpaceWatcherFix-dtl considered harmful
by Andreas Raab 09 Apr '05

09 Apr '05

Hi Folks - Trying to track a problem in Tweak I ran into the above mentioned update. I won't comment on the process of how it got into the image (I think you all know my opinion about eyeballing system-critical changes and I am almost certain that the approval went something like "oh, what possible harm could a one-line change do") but I am rather interested in what problem this is trying to fix. The comment of the change set states: "The low space watcher is interrupted in the context of the wrong process when the eventTickler process (or other high priority process) is running. This prevents low space detection from functioning properly." But this makes no sense whatsoever. The low space watcher can be only be interrupted if it is running (non-running processes are never interrupted) but all the running low space watcher does is to throw up an interrupt (which we all agree on is the right thing to do) on the currently active process. If the user presses Alt-period when this happens why would it be wrong to interrupt the low space watcher? It is precisely the right thing to do (in fact, it is the only thing that can be done if we are to honor the user interrupt). If we choose to *ignore* the actual running process (such as is done in the above update) and just arbitrarily interrupt the "main" project process we will never be able to interrupt any run-away process which is different from the main process. As an example, take: [[true] whileTrue:[]]] forkAt: Processor userSchedulingPriority+1. With the original version of the method you *were* able to interrupt that process (try it - revert to its previous version run the above and hit alt-period). With the version of the method in the update you will not be able to interrupt a runaway process like the above. Whatever this update is trying to address, it cannot possibly be what is being claimed in the preamble. So what problem is this update trying to solve? Cheers, - Andreas

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graphic designers: trash can icon!!
by Lex Spoon 04 Apr '05

04 Apr '05

The current trash can icon in Squeak does not look right if your background is non-white. I have played a little with trying to fix it, but this is beyond my graphics tweaking skills. Does anyone know how to fix the thing so that it looks okay on an arbitrary background? Or, is there a trashcan icon we can steal from somewhere else? Or does someone want to draw a new one? Don't forget there are really two icons: closed can, and open can. -Lex

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Finding a method.
by Michael van der Gulik 03 Apr '05

03 Apr '05

Hi all. When coding, I'm often wanting to go to a specific method at a specific class. Is there a shortcut to do so? E.g. I just want to press ALT-something from anywhere (i.e. a global keystroke), and then type in 'MyClass>>myMethod', which will pop up a browser on that method. Preferably, it would do so without me having to reach over for the mouse. Mikevdg.

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Automatic Startup
by Daniel Salama 03 Apr '05

03 Apr '05

Hi, I've been playing with Squeak to develop web based applications. My intentions are to be able to develop some web based framework which will require that Squeak be running all the time. I'm running Squeak on a linux server. Is it mandatory for the X interface to be running? Can Squeak be started as a daemon process? If not, how would you suggest to configure the machine so each time it's rebooted, Squeak will be launched? Thanks, Daniel Salama

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