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[Pharo-project] Cog+linux: external module not found
by Schwab,Wilhelm K Jan. 6, 2012

Jan. 6, 2012

Eliot, I'm getting an external library not found error on Ubuntu lucid with the Cog vm from http://gforge.inria.fr/frs/download.php/29042/CogVM-Unix-13307.zip The library lives in /usr/lib and is known to ldconfig by the name that I have specified in #moduleName. What do I need to do? Bill

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[Pharo-project] happy new year plus cogdroid news
by Dimitry Golubovsky Jan. 6, 2012

Jan. 6, 2012

Hi, I saw responses from several people, will answer to everybody in a single message. StÃ©phane Ducasse wrote: >> It would be nice if a smaller base Pharo image could be built such >> way, so it could be embedded with VM and distributed together. > yes we are working slowly but steadily on that. > Did you try the pavel image? Not yet, but you just reminded me that it exists; eventually I'll try it out ;) Alain Rastoul wrote: > And if yu have an APK that I can download somewhere else than on the market, I never put CogDroid on the market - it is in google code. > I am interested > (the ALT and CTL key missing are really painful, I use the blue/yellow > button emulation but it is not cool) Give me some time to finish locale support, and I'll put some apks to a temporary location (other than google code - downloads in google code are unremovable). Keyboard modifiers work fine in x86 Android, but I just don't have any ARM device with keyboard to test it. > I am not sure the image size is really a problem on a tablet ? > lot of games - angry birds game (free on android market ) for example- are > about 30MB if I m right, It is more about the fact that bundling an image together with apk makes the image immutable. Such approach would be good if a specific application is shipped, or to have a "starter" image that provides a more convenient framework to download/upgrade other images than just doing that in Android browser. > I clearly had the feeling that the battery is going down faster when I use > Pharo perhaps because not all Smalltalk processes are sleepng and so the vm > never sleep ? > The UI morphic process make pauses of 20 ms when there is not event , I > don't know for others processes (Timer event loop, Input events process). > I have to investigate Have a look at this file: http://gitorious.org/~golubovsky/cogvm/dmg-blessed/blobs/master/platforms/a… methods of interest are timerEvent, and every method that calls it. The timerEvent method spawns a thread which generates a predefined (or infinite) number of timer events with given interval (timerDelay which is hardcoded as 200ms). But when interpreter returned by interval timer (this is necessary to have Android runtime poll for events), it will be reentered immediately beause there is some unfinished business. If user input is received, additional timer threads will be spawned, for limited amount of events generated. I may set this timerDelay to much larger value. But then VM will be frozen until any user input arrives - even server mode flag won't help. Even cursors in text inputs will stop blinking. Maybe this timerDelay has to be configurable if battery life is a concern. > Cool, if the clipboard vm primitives are ok, the System Clipboard class > should work ?. Not yet. All I have is a primitive that reads from Android clipboard (maybe I need to add one that writes there), but it has not been integrated with the rest of the image (and such integration is not really part of the VM). Perhaps a pair of items has to be added to the text editing context menu to copy/cut to and paste from Android clipboard. Schwab,Wilhelm K wrote: > Does an Archos 43 count as an Android device? I bought it with plans that fell flat (the target moved, and the OS was a little disappointing). That said, I have it and can > help with testing. I do not have a data plan for it, so my default usage is to copy packages to it via USB. I think it counts, but AFAIK is has 4.3" screen, correct - sized more like a phone? But technically you should be able to run CogDroid on it given enough RAM is available (someone I remember tried it on a phone with 128M RAM and that was not sufficient) 256M should be OK. If you have wifi on the tablet you should be able to hook it up with a home wifi router - only you need to have NAT enabled since Android browser does not use HTTP proxy. Pharo can be configured to use a proxy though so you can access Monticello repos also such way. > It is hard to imagine developing on it, but I'm willing to be pleasantly surprised, and it would be nice to be able to deploy Pharo apps on hand-held devices. You may develop on a PC and then transfer the image to the tablet. Or load packages from Monticello repos as usual (with proxy or NAT). Ben Coman wrote: > Consider getting a Jenkins build going with an Android emulator. Sounds interesting if I could set up build jobs for CogDroid if there are Android build tools on Jenkins. Hopefully I haven't missed anythng - feel free to ask more questions ;) Thanks. -- Dimitry Golubovsky Anywhere on the Web

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[Pharo-project] About ConfigurationOfXMLSupport
by StÃ©phane Ducasse Jan. 6, 2012

Jan. 6, 2012

Hi guys I thought that XMLSupport was about parsing and XMLNode traversal. So why the configuration contains references to SIXX and Grease Core? Stef

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[Pharo-project] What should be in a configuration?
by Dale Henrichs Jan. 6, 2012

Jan. 6, 2012

Obviously, this post is inspired by the 'About ConfigurationOfXMLSupport' thread[1] on the pharo list. Many of the issues with ConfigurationOfXMLSupport are mired in a history that goes back to the very beginnings of Metacello. In the end ConfigurationOfXMLSupport is what it is... When it comes to what should be in a configuration, my opinion is that each project on SqueakSource should have a configuration. If it is worth having a separate project on SqueakSource, then it is worth having a configuration. Yes, even if there is only one package in the project it should have a configuration. The reasoning is simple: - projects evolve over time - as projects grow, eventually it makes sense to split the project into multiple packages - as projects grow, they are ported to other platforms and not all ports can be done without writing some platform specific code that needs to be packaged in a separate package - as projects grow, they become dependent upon other projects ... - over time the support for a project on VERSIONS of a platform change. Support is dropped for one version and added for another - over time the project API changes and not everyone can immediately move to the new API - over long enough periods, projects move from one repository to another Configurations were invented to address these problems and some of these problems exist no matter how many packages or dependent projects are involved. If I use a configuration to load the code from a project, all I have to worry about is which version of the project I want to use. When I see a new version is available, I can control when I load that new code and be assured that the code won't move out from under me ... Remember the message from the Metacello presentation that Mariano and I gave at ESUG 2010[2]: Configurations are NOT for the DEVELOPERS of a project but for the USERS of a project Dale [1] http://forum.world.st/About-ConfigurationOfXMLSupport-td4244103.html [2] http://www.youtube.com/watch?v=zWHS5xIo_xI&feature=youtu.be&a

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[Pharo-project] Refactor class > Accessors not working for instvars with leading numeric
by Ben Coman Jan. 6, 2012

Jan. 6, 2012

For the following accepted class definition (so presumably leading zero is a valid instance variable name), from the menu selecting "Refactor class > Accessors" fails with "Error: End of statement list encountered EpcimIdentifiedObject subclass: #EpcimBaseVoltage instanceVariableNames: '0nVoltageLevel' classVariableNames: '' poolDictionaries: '' category: 'IEC61970-Core' If I take away the leading zero on the instance variable it works okay. I can get by with it not working but wondered whether I log a bug report or am I doing something wrong? I do want to keep the leading zero because I am using it to mark the multiplicity of associations (eg see BaseVoltage/Voltage down the bottom of [1]). [1] http://forum.world.st/forward-engineering-UML-models-into-Smalltalk-code-td…

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[Pharo-project] Prematurely ending document on purpose with the SAXParser
by HernÃ¡n Morales Durand Jan. 6, 2012

Jan. 6, 2012

Since XML-Parser-JAAyer.50 the SAXDriver doesn't check anymore for #checkEOD in the #handle methods, have you removed eod iVar for performance reasons? I need it because I have a very large XML and I want to be able to parse some "header" nodes without parsing the entire XML. Otherwise, what would be the way of doing this with the newer versions? UserSAXParser>>endDocument "This call corresponds to the Java SAX call endDocument()." eod := true Cheers, HernÃ¡n

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[Pharo-project] localization
by Milan Mimica Jan. 6, 2012

Jan. 6, 2012

Hello! I notice many of you are not native English speakers so you must have asked yourself this question before: what are the possibilities of localization in Pharo? I'm mostly interested in date and time localization. I notice there is a class named ChronologyConstants, and sure I can modify it, but how do I do it in a nice way, so that the alterations are saved in my own MC package? Moreover, this class alone is not enough. For example, in Croatian, January is not written or pronounced the same when used in a date or used in a enumeration. The English equivalent of today's date would be "6th of January" - notice the "of". There is even less subtle weaknesses: you don't get to choose default date and time format. Hm, looking at ChronologyConstants again, it seem its purpose never was localization, it is merely a shared pool for constants. Do you have any plans for localization? I haven't seen it mentioned. This is a must have in an enterprise-friendly software, you must agree. -- Milan Mimica http://sparklet.sf.net

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[Pharo-project] OpenGL integerated wtih Squeak IDE
by Lawson English Jan. 6, 2012

Jan. 6, 2012

This is a very poor attempt to do what Matt Fulmer did with OpenCobalt: integrate overlapping Morphic windows with OpenGL. The only advantage is that it doesn't require OpenCobalt. https://www.youtube.com/watch?v=Ctm-Q39nd-k The entire World is being rendered onto an OpenGL texture which is updated with every tick. With the proper scaling , the destop could be repositioned along the z access at any point within the fustrum and still keep the default mouse handling. Add mouse handling from OpenGL itself, and you can have 2D widgets projected onto 3D objects, not to mention 3D widgets fully integrated with the Squeak desktop. Time to revive/revitalize Balloon3D, perhaps? Whatever happened to 3D Morphic? There's obviously a great deal of room for optimization, and of course, the sky is the limit for what could be done in terms of lighting, materials, etc. Using more modern APIs of OpenGL (I'm using immediate mode! (!) and only stuff from the first 6 NeHe tutorials) one could have an awful lot of interesting stuff going on. Lawson

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[Pharo-project] [OT] Any Pharoer in Brussels ?
by laurent laffont Jan. 6, 2012

Jan. 6, 2012

Hi, JohnnyT and me will be in Brussels for FOSDEM from February, Friday 3 to Tuesday 7. We are searching for some place to sleep. Anyone with a couch ? (I promise to bring Fondue Savoyarde http://www.fonduesavoyarde.com/ :) Cheers, Laurent Laffont - @lolgzs <http://twitter.com/#!/lolgzs> Blog: http://magaloma.blogspot.com/ Developer group: http://www.cara74.org Pharo Smalltalk Screencasts: http://www.pharocasts.com/ Pharo web deployment: http://www.alpha.smallharbour.org

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Re: [Pharo-project] [COTDC] 100 - GZipConstants
by Ben Coman Jan. 6, 2012

Jan. 6, 2012

sean(a)clipperadams.com wrote: > A new class for the New Year... > > 99 classes done > 797 classes remaining > Continuing in Compression... > > Today: GZipConstants > > > Comment Of The Day Contest - One Day One Comment > Rules: > #1: Each day a not commented class is elected. Each day the best comment will be integrated with name of the author(s). > #2: If you cannot comment it, deprecate it. > Results: http://code.google.com/p/pharo/wiki/CommentOfTheDayContest > > p.s. this message was sent from a pharo image. Did you know you could easily do that?! > > > Well again this is something I can respond to without a great knowledge of Smalltalk. RFC1952 is short and clear enough that extracts from probably don't need to be included it like the last one I did. -------------8<----snip--------------- This class defines magic numbers taken from the RFC1952 GZIP file format specification version 4.3 (1996) [1]. A class imports these constants as 'class variables' by including the following in its class definition: poolDictionaries: 'GZipConstants' A method on the class side initialises the values. [1] http://www.ietf.org/rfc/rfc1952.txt (Section 2.3.1 Member header and trailer) -------------8<----snip--------------- As an aside the following in [GzipConstants class >> initialize] does not match the specification for bit 5 as "reserved". GZipEncryptFlag := 16r20. "Archive is encrypted" I did find it defined here [2] & [3] however the FAQ [4] specifically says encryption is NOT part of the standard. This constant is only used in [GzipReadStream >> on:from:to] as... (flags anyMask: GZipEncryptFlag) ifTrue:[^self error:'Cannot decompress encrypted stream']. So perhaps its okay to leave but maybe some slight benefit from amending the text as follows.. GZipEncryptFlag := 16r20. "Archive is encrypted. Not supported. Not part of the standard." ifTrue:[^self error:'Cannot decompress encrypted stream. Encryption is not part of RFC1952']. It is a better presentation to a user if you can indicate that it is someone else's fault that their decompress failed, and not Pharo. [2] http://www.onicos.com/staff/iz/formats/gzip.html [3] http://research.cs.wisc.edu/wpis/examples/pcca/gzip/gzip.h [3] http://www.gzip.org/#faq15

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