September 2015 - Pharo-users

[ann] brick on top of bloc - preview
by Tudor Girba Sept. 10, 2015

Sept. 10, 2015

Hi, We are happy to announce the first preview version of Brick, a new widget set created from scratch on top of Bloc. Brick is being developed primarily by Alex Syrel (together with Alain Plantec, Andrei Chis and myself), and the work is sponsored by ESUG. Brick is part of the Glamorous Toolkit effort and will provide the basis for the new versions of the development tools. Brick's goal is to provide a beautiful looking widget set, and the default look is based on material design. The widgets are theme-able. Right now, there exists: - Label - Simple button - Toggle button - Checkbox - Radio button - Window with or without an active title bar that can include various visual actions and info - Menu - Beautiful scrollbars that are thin by default and enlarge when the mouse hovers over it - Scalable list for huge amounts of items with various heights (The list also allows one for embedding text widgets with in place editing) The next immediate target is the creation of a new Pager widget (the widget that is behind the current GTInspector). You can see some screenshots on the official site: http://gt.moosetechnology.org/brick To play with it, you can download a ready-made image: https://ci.inria.fr/moose/job/gtoolkit5/lastSuccessfulBuild/artifact/gtoolk… and, in a Bloc space, you can browse the examples: BrExampleBrowser exampleOpen We would be happy to hear your feedback. Cheers, Doru -- www.tudorgirba.com "Every thing has its own flow"

13 21

Flattr added to pharo.org
by Marcus Denker Sept. 9, 2015

Sept. 9, 2015

Hi, We added at Flattr button: http://pharo.org/contribute <http://pharo.org/contribute> Direkt link is: https://flattr.com/thing/4606474/Pharo-Welcome-to-Pharo Marcus

2 4

Creating class with empty Catagory!
by Volkert Sept. 8, 2015

Sept. 8, 2015

Would it be nicer to open a Altert box? BW, Volkert

4 3

"Create initializer with inst vars" is broken
by Volkert Sept. 8, 2015

Sept. 8, 2015

Is this a known bug? leads to ... Pharo 4.0 / build 40621 BW, Volkert

3 3

New Pharo based solution in the wild
by Esteban A. Maringolo Sept. 8, 2015

Sept. 8, 2015

Hi all, After one year of negotiations (demos, quotes, etc.) and a couple of months of development, by the end of December we released a pilot version of our pharo based solution. The solution consists of a native mobile app (Android), with Pharo 2.0 servers, using Seaside for the web UI, Seaside-REST for the mobile app API and Zinc Websockets to certain "live" features of the web. The persistence is GLORP using the native PostgreSQL driver. I can't disclose much more about the customer or the solution yet, it is a private solution for a multinational consumer goods company operating in Argentina. But I can comment on the numbers: * The pilot will end in ~40 days * It involves 50 mobile users of the Android app using it daily. * An nginx frontend for static files and http proxying to the pharo app servers * Two pharo images as servers, one for the web interface, and one for the REST API. The image is the same, they work as two separate app servers to make use of each server and for improved reliability (I don't want the seaside failures, which has been none yet, to affect the REST API). * Everything running in DigitalOcean droplets based in NYC (they add ~180ms of latency from here but their price/value equations is unmatched). Some performance numbers: * The Pharo server uptime has been no less than perfect, the first 10 days with uninterrupted uptime. Only shutdown to upgrade the image (yesterday night). * The load is minor, with peaks of ~30 concurrent mobile users during a few "business" moments of the day, the server never passed 15% of CPU use. The disk I/O is also small, but the database is small too (growing daily). If the pilot succeeds the plan is to extend the user base to ~1000 mobile users. But some water must pass under the bridge before thinking of that. And if it ever happens, it is going to be gradual. Some anecdotal info I quit my Smalltalk full time job at InfOil (after 9 years of employment) to dedicate 100% to my new company. So I'm betting big on this. By now I'm the sole Smalltalk developer (devops?) of the company. Time has never been more scarce than nowadays. Why Pharo? * Because it is the best open source Smalltalk ("inspired") out there. * Because I have 10+ years of experience with Smalltalk I can't throw away in the context of rapid prototyping and business domain modelling (emphasis on this). * It was a key advantage during the negotiations, we could show a wireframed live app even before our competition prepared a PowerPoint presentation. The development process with Pharo has been rudimentary, only Monticello packages and a couple of workspace scripts to provision new images. I still can't get my head around Metacello. But honestly I haven't dedicated as much time as it needs to be learnt. Having used VAST ENVY's ConfigurationMaps successfully in the past is a proof I can learn Metacello. During the last years at InfOil we were using git with Dolphin Smalltalk, with CI after every git push to the main repo. This was also linked with our issue tracking system, in order to know in which build a certain issue was fixed. We used Dolphin's PAX's files (CVS friendly), Gitlab, JetBrain's TeamCity and YouTrack I'd like to do the same using Monticello's FileTree, BitBucket and JIRA (CI server to be defined). Hopefully with some time, I'll be able to dive deeper into this. My learning of Pharo tooling hasn't been straightforward, but maybe because I'm old and spoiled with other Smalltalk dialects (VSE, VAST, Dolphin). I was managing the Android code (java) with git branching and merging way before I learnt how to use Monticello. Managing the code (files) was the only advantage of working with Eclipse/Java. Everything else was a burden compared with Pharo. I wanted to share my experiences through a blog, but haven't had time to set it up as I'd like, and by now this email is going to be all I can share. After the pilot, we can talk about reporting a success story for Pharo. I felt like this during the last week: http://devopsreactions.tumblr.com/post/68251866244/successful-deployment-at… Best regards, Esteban A. Maringolo CTO (aka DevOps), http://trentosur.com

8 9

Mathex: Generating latex math from Pharo.
by Julien Delplanque Sept. 8, 2015

Sept. 8, 2015

Hi everyone, Some time ago, I asked for a framework that would allow me to write valid latex math from Pharo (in a similar way that I used to do with pylatex in Python) see the thread here: http://forum.world.st/Generate-latex-from-Pharo-td4826739.html. Damien Cassou pointed me the Pillar-ExporterLaTeX package to do it, so I used it to create the Mathex package that you can get here: https://github.com/juliendelplanque/mathex or by evaluating: Metacello new baseline: 'Mathex'; repository: 'github://juliendelplanque/mathex/repository'; load. for tests: Metacello new baseline: 'MathexTests'; repository: 'github://juliendelplanque/mathex/repository'; load. From now, it does not support all the possible math commands of latex but you can already do things like: (Phi equal: ((1 asMathex + 5 asMathex sqrt) // 2)) equation asString. and get: \begin{equation} \phi=\frac{ 1 +\sqrt{ 5 }}{ 2 }\end{equation} Also, and in fact this is the kind of feature I was looking for, you can export a Matrix into latex math like this: (Matrix diagonal: #(42 42 42)) asMathex asString. Each command/operation is represented by an object in the package. To understand how I implemented that have a look on the MObject>>#doesNotUnderstand: where I explain it. I will soon work on an importer that will create, automatically, latex command as objects from a file that describe how to do it. What do you think about this? Hope this package could helps someone else one day. Julien

4 7

Personal consultancy/development offer
by Esteban A. Maringolo Sept. 8, 2015

Sept. 8, 2015

Hi all, As I shared in other mail, a few months ago one of our customers shut down the biggest project (Pharo based) of my small company, that had a big impact on the economic side but also freed a lot of my committed time. That, plus the birth of my first daughter kept me away from the keyboard from a couple of months. But now I'm coming back to the game :) My company have other prospects which, if sold, will use Pharo as a solution, but meanwhile I'm looking to work freelance in Pharo (or Smalltalk) related projects. If you know of anybody who needs a Pharo/Smalltalk developer, please let me know. Thank you! Esteban

1 0

Modifying the AST of a method
by Sean P. DeNigris Sept. 8, 2015

Sept. 8, 2015

>From GÃ¼nter Khyo: GÃ¼nter Khyo wrote > Hello! > > I want to replace particular nodes of an AST (such as Assignments or Self > sends) with my own nodes. > Is there an easy (high-level) way to do this without being familiar with > the entire compiler infrastructure? > > The problem I am having is that AST nodes maintain internal state such as > parent links and, in the case of RBVariables, links to scopes and > bindings. There might be many other dependencies I am missing and missing > one of them can trigger exceptions with stack traces buried deep in the IR > Code-Generator and visitor calls. > > For example, if I want to replace an assignment such as > > Morph>>position: aPoint > > "box := self fullBounds." > > with something like > > "self assignAndNotifiyDependents: self fullBounds to: 'box' " > > Btw: I know there is a rewrite tool, but I want to do it programmatically. > > Thanks! ----- Cheers, Sean -- View this message in context: http://forum.world.st/Modifying-the-AST-of-a-method-tp4848709.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

3 2

Error pasting UTF8 text (Pharo 5-50298)
by H. Hirzel Sept. 8, 2015

Sept. 8, 2015

Hello I pasted a method from a LibreOffice Writer document into Pharo and got an error message. To replicate the error paste epsilon ^ 'É' as a method into a browser. Suggestions how I can fix this? Regards Hannes

4 6

Loading code with accent in the method or variable name
by Hilaire Sept. 8, 2015

Sept. 8, 2015

4 10