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[ANN] Aida/Web 6.2 Spring edition is out
by Janko MivÅ¡ek Feb. 11, 2011

Feb. 11, 2011

Dear Smalltalkers, On the sunny side of the Alps we have a spring already, so let me bring a bit spring to you too with this new Aida release :) Fresh features from last month: - new event framework - unified JSON messaging (over WebSocket, Ajax, Comet) - pure JavaScript for Ajax, Prototype loaded only on demand - image based persistence - snapshot every hour - view active/logged sessions in Security - whitelisted IPs in Security - red 'browser not supported' warning on top of page And to repeat new features from Christmas beta: *Mobile* devices like smartpone and tablet support, with mobile device detection and special mobile CSS as addition to screen CSS, so that you can easily adapt your existing apps to mobile simply by overriding the existing CSS. *HTML5* support: Aida switches now to HTML5 by default and HTML5 specific features will be gradually added, WebSocket is there already, local storage and offline support comes next. *WebSocket* support for bidirectional communication between server and browser, as a replacement for Comet. WebSocket channel is now automatically open on the session with WebSocket capable browser. *JSON* messaging introduced to be gradually used as only message format in unified (Ajax or WebSocket) communication between server and browser *Widget forms" introduced, hierarchy of forms follow the hierarchy of standalone widgets, each widget can Ajax submit its own form together with subforms in subwidgets. There is now a continuously built One-click Pharo image (with new Aida preloaded and running) available via Download now button on http://wwww.aidaweb.si/download.html (thanks Pharo guys!). 6.2 is released on Squeak/Pharo and VisualWorks and it will be also avaiable on the soon to be released VisualWorks 7.8 CD. Release notes with most important new features highlighted are available at: http://www.aidaweb.si/release-notes-6.2 . Happy web smalltalking with new Aida! Janko -- Janko MivÅ¡ek AIDA/Web Smalltalk Web Application Server http://www.aidaweb.si

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windows/flaps not responding
by Markus Schlager Feb. 9, 2011

Feb. 9, 2011

Hi all, I'm currently teaching smalltalk with pharo1.1 on Linux to pupils (10th grade). Some of them are experiencing the following problem: After reopening their pharo-image none of the windows left open before nor the window-flap at the bottom are responsive to mouse-clicks. Wherever you're clicking on, the world-menu shows up. You can open new system windows though. These will behave nicely. Is there any way to reactivate the old system-windows and the flap? Unfortunately I discarded the buggy images. Essentially the pupils had been reading ProfStef-Tutorials and some workspaces and browsers opened. Markus

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Pharocasts: GUI with Polymorph
by laurent laffont Feb. 9, 2011

Feb. 9, 2011

Develop a contact manager desktop application. You will learn: - how Pharo helps the "Program by intention" style of programming - how to create basic persistency of created Contact object - how to compose a GUI, basic widgets, events and layout http://www.pharocasts.com/2011/02/pharo-gui-with-polymorph.html <http://www.pharocasts.com/2011/02/pharo-gui-with-polymorph.html> Laurent Laffont - @lolgzs <http://twitter.com/#!/lolgzs> Pharo Smalltalk Screencasts: http://www.pharocasts.com/ Blog: http://magaloma.blogspot.com/

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[ANN] JNIPort 2.0 for VisualWorks, Pharo and Squeak
by Joachim Geidel Feb. 5, 2011

Feb. 5, 2011

JNIPort 2.0 for VisualWorks, Pharo and Squeak is now available! JNIPort is a Smalltalk library which allows Java code to be invoked from Smalltalk. It acts as a bridge between the world of Smalltalk objects and a Java Virtual Machine (JVM) where Java code is executing. For more information see http://jniport.wikispaces.com JNIPort 2.0 for VisualWorks can be loaded from the Cincom Public Store Repository and from the JNIPort wiki at http://jniport.wikispaces.com/Downloads JNIPort 2.0 for Pharo and Squeak is available from SqueakSource at http://www.squeaksource.com/JNIPort.html and from the JNIPort wiki. The changes from JNIPort 1.9 are: - JNIPort can now be used in Pharo and Squeak. - Packages have been renamed such that the can be shared between Store and Monticello. - Platform specific code has been moved to separate packages to make the core packages portable between VisualWorks, Pharo, and Squeak. - The much-critized _null postfix used for selectors of wrapper methods which don't have arguments is gone. - A few bugs have been fixed. Installation instructions for VisualWorks are on the JNIPort wiki, instructions for Pharo and Squeak are on the wiki of the JNIPort project page of SqueakSource. I strongly encourage you to read the instructions before installing and using JNIPort. JNIPort 2.0 has been tested with: - VisualWorks from 7.5 to 7.8 (trent dec10.3) on Mac OS X 10.6.6 and Windows XP SP 3 - VisualWorks from 7.7 to 7.8 (trent dec10.3) on Ubuntu 10.04 (64bit) with both the 32-bit and the 64-bit VisualWorks VMs - Squeak 4.2 on Mac OS X 10.6.6 and Windows XP SP 3 - Pharo 1.1.1 and 1.2 on Mac OS X 10.6.6 and Windows XP SP 3 Known issues: - In Pharo 1.1.1, you may encounter an error when JNIPort tries to register a new Java object in an internal weak dictionary. This is a bug in Pharo's implementation of this collection class. I can't do anything about it. If you can't live with it, please upgrade to Pharo 1.2. - JNIPort for Pharo and Squeak currently cannot be used with the Cog VM. - Callbacks from foreign operating system threads cannot be used in Pharo and Squeak. The Alien foreign function interface does not yet support this feature. When you run the unit tests, three tests will fail because of this restriction. These failures are expected and do not indicate bugs. Best regards, Joachim Geidel

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Pharocasts: StringCalculator Kata
by laurent laffont Feb. 5, 2011

Feb. 5, 2011

This is the first Kata proposed by the 12meses12katas<http://www.12meses12katas.com/> (12 months 12 katas) initiative. You will learn: Test-Driven Development, the Pharo way. Recorded and edited by Rafael Luque <http://vimeo.com/user1627267> (big thank you!). Here: http://www.pharocasts.com/2011/02/stringcalculator-kata.html Laurent Laffont - @lolgzs <http://twitter.com/#!/lolgzs> Pharo Smalltalk Screencasts: http://www.pharocasts.com/ Blog: http://magaloma.blogspot.com/

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TFFiler: creates file containers to store external files in Monticello
by Tony Fleig Feb. 4, 2011

Feb. 4, 2011

I've published a tool I'm using called TFFiler. My problem was that I had a number of external files that were required for my Seaside web application. These were CSS, Javascript, and image files that had to be placed in a specific directory tree structure. When I moved my web app to another system, I always had to remember to reconstruct the external directory tree. Over time, the directory tree got larger and more complex. For deployment, I wanted the files to be served by Apache and not the Seaside ExternalFileLibrary. (ExternalFileLibrary was the most convenient approach during development.) This meant the directory tree should be moved to a location other than the Pharo Resources directory, which was the most convenient location during development. The current version of Monticello does not provide a way to save external files with a project. TFFiler addresses this shortcoming. Now when I load my project from Monticello the necessary external files are deployed automatically. Maybe someone else will find this useful as well. http://www.tonyfleig.com/smallthoughts/blog/tffiler http://www.squeaksource.com/TFFiler Regards, TF

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Matrix
by Werner Kassens Feb. 3, 2011

Feb. 3, 2011

Hi, i use Pharo-1.1-11411 and got a few questions. i looked at the comments of Matrix: it talks about Array2D but this object does not exist? it says "Element-wise matrix arithmetic works", but this is not true: while + - * functions in this way: aNumber + aMatrix, "/" does not always function: aSmallInteger / aMatrix produces an error, because aMatrix is tested with isZero. a simple fix would be to change the first program line in SmallInteger>>/ from: aNumber isZero ifTrue: [^(ZeroDivide dividend: self) signal]. to: (aNumber isNumber and: [aNumber isZero]) ifTrue: [^(ZeroDivide dividend: self) signal]. further aMatrix + aNumber and similar arithmetic dont work. but with the above fix it would work nicely with simple implementations like this: Collection>>/ / aNumber ^aNumber adaptToCollection: self andSend: #/ and so forth. while testing these things with Fractions, i noticed this: printing {3/4} produces this output:{(3/4)}. printing {{0.75}} produces this output:#(#(0.75)). printing {{3/4}} produces this output:{((Array new: 1) at: 1 put: (3/4); yourself)}. i wonder what the last output wants to tell me? does it want to tell me, that the last thing uses up a lot more memory than the first two, and accessing it takes more time, so that i should use the second thing instead, or is it (more or less) just print output related? werner

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auto compile accessors / updators
by Phil Feb. 1, 2011

Feb. 1, 2011

Is there an equivalent in in pharo/squeak of the GemStone method #compileMissingAccessingMethods cheers, phil

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Left recursion in PetitParser
by Andrew Black Jan. 31, 2011

Jan. 31, 2011

I have a PetitParser question. A small part of my grammar is like this: expression := constant / namedSend / ... namedSend := receiver dot namedMessage / ... receiver := expression This is of course left-recursive. I believed the "all the rest is magic" blurb and just went ahead and wrote it as given above. I get an infinite recursion when I run the parser. I know how to left-factor the grammar by hand. But should I have to? How powerful is thy magic, Lukas? Andrew

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Scrolling in a Morphic game
by Aidan Gauland Jan. 29, 2011

Jan. 29, 2011

Hello, I am developing a game in Morphic -- nothing serious; just a spare time project -- and I have come to a tricky part: the viewport. So far, I have just put my Morphs in a PasteUpMorph for testing, but now I need to have a viewport to a (game) world that is larger than the screen, and be able to pan/scroll the view around the world. I really have no idea how I could or should do this in Morphic. Maybe subclass PasteUpMorph and override #drawSubmorphs? Can anyone here offer any advice with this? Regards, Aidan

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