August 2015 - Pharo-users - lists.pharo.org

World lastKeystroke and openInWorld: aPasteUpMorph
by Markus Schlager Feb. 20, 2016

Feb. 20, 2016

Hi, I'm using pharo to teach smalltalk as first 'real' programming language at school. With older versions of pharo I was glad that my pupils could track keystrokes so easily by evaluating World lastKeystroke. With Pharo3.0/4.0 this only returns '<down>' independently of any keys I'm typing. f := PasteUpMorph new openInWorld. f takeKeyBoardFocus. f lastKeystroke. Is returning the empty string. Hence, my question: Is lastKeystroke broken, or how is it meant to be used now? Second problem: In older versions of pharo this would work: f := PasteUpMorph new openInWorld. b := EllipseMorph new. b openInWorld: f. But with Pharo 3.0/4.0 the last line raises an error: MessageNotUnderstood: PasteUpMorph>>startSteppingSubmorphsOf With f := WorldMorph new openInWorld. b := EllipseMorph new. b openInWorld: f. pharo freezes. So: How is openInWorld: meant to be used? Markus

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Halo Menu On Spec Tree Node
by Craig Johnson Jan. 6, 2016

Jan. 6, 2016

Hi All, I had an issue - when I opened a Halo on a Spec tree node in the UI and select the menu Icon, I got a DNU message. However if I selected a normal Morph, the menu Icon worked fine. I'm using Pharo 4.0 released version. Fixed this by changing TreeModel>>iconFor to: iconFor: aNode ^ iconBlock value cull: aNode content*s* cull: aNode Craig

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[ANN] Multiple Desktop support for Pharo 5
by Torsten Bergmann Dec. 21, 2015

Dec. 21, 2015

Julien Delplanque provided this week a goodie to switch between "desktops" - but his initial solution was more or less hiding windows and not really switching between real Pharo worlds/desktops. I gave him some tips what could be done on the pharo-user list. Havent heard from him afterwards. Now I was able to spend a few hours on this topic myself and implemented a full multiple desktop solution myself. This works in Pharo 5 only (currently) and requires latest VM (at least on Windows) from files.pharo.org to get the keyboard shortcuts right. To try: Gofer new smalltalkhubUser: 'TorstenBergmann' project: 'DesktopManager'; configuration; loadDevelopment. The goodie has some nice features like keyboard navigation, world menu integration and even a custom spotter with preview of the desktops. Quick start: =========== - evaluate the above expression in a Pharo 5 image - check the world menu "Desktop" - you can press CTRL + D and then CTRL + A (= Desktop Add) to add a new desktop - you can press CTRL + D and then CTRL + D (= Desktop Desktop) to open the overview - you can press CTRL + D and then CTRL + P (= Desktop Previous) to navigate to the previous desktop - you can press CTRL + D and then CTRL + N (= Desktop Next) to navigate to the next desktop The code is hopefully a good example on how to build a custom spotter, shortcuts, inspector extensions, ... Additionally all this is described in a new article including screenshots and a guide on how to use this new goodie: https://medium.com/@astares/multiple-desktops-for-pharo-5cbc46f3179f Actually the article took more time to write than coding but I hope it helps explaining Pharo and why it is a power tool. Project is on http://www.smalltalkhub.com/#!/~TorstenBergmann/DesktopManager Article and code is still subject to change. Have fun T.

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More fun with Morphic: 1st iteration of a Mindmapping tool
by Stephan Eggermont Nov. 19, 2015

Nov. 19, 2015

The past three days, Noah Domingo (15) and I have been working on a new Morphic example. We have build a first iteration of a Mindmapping tool. Noah shows it in: https://vimeo.com/136943448 We would be interested in some design critique. The way the Rubric text field is embedded in the MindmapNode is not so clean. The code can be loaded by Gofer it smalltalkhubUser: 'StephanEggermont' project: 'Mindmap'; package: 'Mindmap'; load

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Re: [Pharo-users] Using Google service discovery API's with Pharo Smalltalk by Richard J. Prinz
by Andy Burnett Nov. 9, 2015

Nov. 9, 2015

Sven wrote <<< I hadn't seen this posted on the mailing list, but this is really cool stuff. Using Google service discovery API's with Pharo Smalltalk by Richard J. Prinz http://www.min.at/prinz/?x=entry:entry150318-104537 < http://www.min.at/prinz/?x=entry:entry150318-104537;comments:1#comments> >>> I totally agree with this. I have played with the code, and started writing some code which manipulates the Google services. It is really powerful. Also, Richard has developed a slick way of dealing with OAuth when running a client app. This is great!

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[ OT ] About Encodings and Character Sets
by Sven Van Caekenberghe Sept. 28, 2015

Sept. 28, 2015

This is a nice article: What Every Programmer Absolutely, Positively Needs to Know About Encodings and Character Sets to Work With Text http://kunststube.net/encoding/ Which refers to this well known article: The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) http://www.joelonsoftware.com/articles/Unicode.html Sven PS: in Pharo, the first part of this draft might help too: Character Encoding and Resource Meta Description http://stfx.eu/EnterprisePharo/Zinc-Encoding-Meta/ A newer version will be part of the upcoming book.

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Rectangle center rounding
by Jan BlizniÄenko Sept. 22, 2015

Sept. 22, 2015

Hello I came to problem with Roassal which originates in Rectangle class. Although rectangle holds its points (origin and corner) in float (not rounded) numbers, the Rectangle>>#center method rounds it down to integers. It causes wierd behavior in Roassal where moving elements in some ocasions are "jumping" to all directions like a jelly. I understand it is for performance reasons, but I think this optimisation is not on the right place. Rectangle origin: 0.9(a)0.9 corner: 3@3 just does not have center 1@1, it is way too far from the real center. Shouldn't the rounded method be separated as for example roundedCenter or something like that to eliminate the confusion? Jan -- View this message in context: http://forum.world.st/Rectangle-center-rounding-tp4837980.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[Smalltalks 2015] --- Invitation
by Andres Valloud Sept. 10, 2015

Sept. 10, 2015

The FundaciÃ³n Argentina de Smalltalk proudly invites you to one of the premier Smalltalk conferences in the world. Let's meet at Buenos Aires, November 11-13! For more details, see the invitation here: http://www.fast.org.ar/Smalltalks2015-invitation.pdf

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[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"

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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

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