Squeak-dev January 2007

squeak-dev@lists.squeakfoundation.org

160 participants
184 discussions

Key values in Tweak platform-dependend?
by Stefan 21 Jan '07

21 Jan '07

Hi folks, We are 3 students trying to implement a lil' game in Tweak. In doing so, we have to catch keyboard events using a method like: onKeyDown: event | keyValue | <on: keyDown> keyValue := event keyValue. Thereby the value of keyValue differs in dependency of the underlying OS. On Windows the keyValue equals the ASCII-values ('A' = 65). On Mac OS we get completely different values, e.g., an 'A' results in 0. Currently we work around that problem by checking Smalltalk platformName. Does someone know another (and better ;) ) way to resolve it? Thanks for your help.

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Squeak on the PlayStation 3
by Aaron Reichow 21 Jan '07

21 Jan '07

Hello everyone- I just had a quick question- does anyone here have a PlayStation 3? If so, have you tried running Squeak? You do have to install it yourself, but it can be done without a modchip or anything else DMCA- breaking. You can use a keyboard and a mouse, attached using USB- no need to write new code to use the controller, though that'd be fun too. I'm curious what a "0 tinyBenchmarks" produces, not that is the best benchmark in the world or the VM would be optimized. Anywho, if anyone is working on this I'd be interested in hearing about it! Info on getting Linux on your PS3 here: http://www-128.ibm.com/developerworks/power/library/pa-linuxps3-1/? ca=dgr-lnxw07Linux-and-PlayStation%203 Regards, Aaron

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Meaning behind SqueakFoundation Logo
by Giuseppe Luigi Punzi 21 Jan '07

21 Jan '07

This was discussed before. I started a thread about this and, well, you can read the responses.... http://lists.squeakfoundation.org/pipermail/squeak-dev/2006-October/110042.…

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Fw: [Box-Admins] General mailingadministrator needed
by Klaus D. Witzel 21 Jan '07

21 Jan '07

Folks, this one is a message forwarded from the Box-Admin list. /Klaus On Thu, 18 Jan 2007 12:10:50 +0100, Marcus Denker wrote: > > On 18.01.2007, at 11:42, Klaus D. Witzel wrote: > >> Hi Marcus, >> >> have a (quick'n dirty, dashed) job description and experience w.r.t. >> stats, workload, expectations on response time etc, periodic stuff? >> > > -> be the admin of all lists that have no admin (but I will try to get > admins for those before) > -> worload: Not much. > -> responsibility: e.g. add new lists should one be needed. > > Marcus > On Thu, 18 Jan 2007 11:37:03 +0100, Marcus Denker wrote: > Hi, > > Anyone intersted in taking over the job as a general > lists.squeakfoundation.org mailinglist admin? > > Marcus

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FFI ExternalStructure - proper memory cleanup
by Jim McLoughlin 21 Jan '07

21 Jan '07

Hello, I have had a casual interest in squeak for a while, but just started doing more serious development in it recently (lots of fun!). I am trying to bridge some functionality from the gnu scientific library (GSL) so I can do numerical stuff in squeak. I have successfully bridged the main functionality I need, but after some research am still a bit confused on the proper way to deal with memory allocated outside the VM: 1. I have ExternalStructure subclasses, e.g. GSLMatrix, that correspond to C structures in the GSL library. (see http://www.gnu.org/software/gsl/manual/html_node/Matrices.html#Matrices for the structure definition.) 2. I allocate these structures using FFI with the GSL library, e.g. via gsl_matrix * gsl_matrix_alloc (size_t n1, size_t n2) 3. I can deallocate the external memory with an FFI call: void gsl_matrix_free (gsl_matrix * m) My questions is WHEN/WHERE I should make this call to make sure external memory is cleaned up properly. In the FFI examples and searching the website, I have seen this done in instance methods "free", "dispose", "destroy", as well as the "post-mortem" finalization described here: http://wiki.squeak.org/squeak/664. Can anyone describe or point me to the "best practice" I should use? Similarly, I assume that if I created instances that point to external structures (e.g. created instances in my Workspace), and shutdown squeak, when I restart the VM, I have some instances with handles that point to invalid external addresses. I am OK to just avoid using these objects, but will the fact that they still have these handles cause problems (e.g. when garbage collection occurs)? If so, what is the best practice here - to reconstitute the external portion of the objects when the image is loaded? Thanks for any help, apologies if this is more appropriate for the beginners list. cheers, Jim M

3 4

primUntrustedUserDirectory trouble of new mac carbon VM
by Tetsuya HAYASHI 21 Jan '07

21 Jan '07

Hi, all, About mac vm 3.8.14beta6U and 3.8.14beta7U, I have trouble. SecurityManager default primUntrustedUserDirectory returns a path name, '/Users/tetha/Library/Preferences/Internet' But, I believe it should have 'My Squeak' as the last path component. When I setup the value of SqueakBrowserUnTrustedDirectory entry in Info.plist as ~/Library/Preferences/Squeak/Internet/My Squeak/aaaaaaaa (add a dummy component aaaaaaaa) then returns '/Users/tetha/Library/Preferences/Internet/My Squeak' I use MacOSX 10.4.8 on PPC box. Best regards, -- Tetsuya HAYASHI <tetha(a)st.rim.or.jp>, <tetha(a)mac.com>

2 7

Linux 3.9 VM and Plugins
by Brad Fuller 21 Jan '07

21 Jan '07

I'm using the 3.9-8 version of the VM from http://squeakvm.org/unix/. It does not contain all the plugins, only: AioPlugin PseudoTTYPlugin UnixOSProcessPlugin XDisplayControlPlugin vm-display-X11 vm-display-fbdev vm-display-null vm-sound-ALSA (yeah!) vm-sound-OSS vm-sound-null Must I build the VM to get all the plugins available for *nix? Or are they available somewhere else? -- brad fuller www.bradfuller.com

2 2

Meaning behind SqueakFoundation Logo
by Brad Fuller 20 Jan '07

20 Jan '07

What is the meaning behind the 3 globes that orbit the smalltalk logo in Stéphane's logo. Has it been proposed to approve this logo for squeak promotion? Or is it only for the SqueakFoundation? Or? -- brad fuller www.bradfuller.com

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About comments, deodorant for bad code, and comment removal by refactorings
by Klaus D. Witzel 20 Jan '07

20 Jan '07

Hi folks, this one jumped right into my eyes: "Comments are not evil by themselves, but are sometimes used as a deodorant to cover bad code. Often we can remove the comments after doing some refactorings, because they are not needed anymore. The code should be self-explaining." For the rest of "Source Code Mining for Code Duplication Refactorings with Formal Concept Analysis", see - http://www.emn.fr/x-info/emoose/alumni/thesis/rriquelme.pdf /Klaus

1 0

Squeak web browser
by David Faught 20 Jan '07

20 Jan '07

Here are a few observations about improving the current status of web browsing in Squeak: After looking through both Scamper and MediaView code, I think that the best approach for coding an improved web browser natively in Squeak would be to work directly on improving Scamper, and maybe use elements of MediaView as a general guide to what might be done with Scamper. Reference the discussion around http://lists.squeakfoundation.org/pipermail/squeak-dev/2006-October/109903.… For this approach, it would probably be useful to upgrade/replace the HTTPSocket code with either the HTTPClient code or the Curl plugin that have been talked about. In my opinion, a better approach would be to build a plugin based on Mozilla's Gecko rendering engine, or http://developer.mozilla.org/en/docs/XULRunner, or maybe even http://ubrowser.com/ and probably requiring the VM changes that Andreas Raab posted on this list a while ago for doing callbacks. For the reasons outlined in my 3 Feb 2006 diary entry at http://people.squeakfoundation.org/person/dfaught/, I will personally not be doing anything at all with any of these approaches, so feel free to explore this area. I am abandoning this particular project because I have contributed very little to it outside of some research, and feel that my time is better spent elsewhere. Dave

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