January 2020 - Pharo-users - lists.pharo.org

Re: [Pharo-users] smalltalk conferences
by tbrunz Jan. 28, 2020

Jan. 28, 2020

I'm in Los Angeles. Plenty of places to hold conferences here! (San Diego & San Francisco, too.) -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Pharo 6.0 and 6.1 64 bit freeze on MacMini
by Ted F.A.van Gaalen Jan. 27, 2020

Jan. 27, 2020

Hi, I reverted to 5.0 because Pharo 6.0 and 6.1 64 bit hangs on my Mac Mini with UDH 4K screen (may that has to do with?) with its maiden image (at first start after download when: I resize or go to full screen. Maybe VM problem? my mac Mini metrics: Hardware Overview: Model Name: Mac mini Model Identifier: Macmini6,2 Processor Name: Intel Core i7 Processor Speed: 2,6 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB L3 Cache: 6 MB Memory: 4 GB Boot ROM Version: MM61.0106.B1F SMC Version (system): 2.8f0 maybe this problem was already reported, but could find it. Kind Regards TedvG

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Fwd: Morph menu entries
by Richard Kenneth Eng Jan. 27, 2020

Jan. 27, 2020

Could someone please explain what the "World contents" menu obtained by right-clicking on the background is all about? (I normally left-click to obtain the "World" menu.) Why are there all those morphs listed? And is this potentially a problem? Thanks. ---------- Forwarded message --------- From: Bob Nemec Date: Sat, 25 Jan 2020 at 10:16 Subject: Morph menu entries Hey Richard, Iâm still learning Pharo, so I donât know what this means, but when I right-click on the desktop I see a long list of StringMorph entries. Later Iâll try starting with a new image. Is there a more recent JRMPC file-out youâd like me to use? *Bob Nemec* *HTS Toronto *| ontario.htseng.com 115 Norfinch Drive | Toronto, ON M3N 1W8 C: 905.442.4539 | T: 416.661.4060 Ext 2255 | F: 416.661.0100 *Delivering Real SuccessÂ®*

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New Smalltalk Blog
by Richard Kenneth Eng Jan. 26, 2020

Jan. 26, 2020

I've created a new Smalltalk blog <https://smalltalk.tech.blog/>. I've left Medium because of their pressure to put everyone behind a paywall. I've opened up the blog for third-party submissions. Anyone can email me an article submission and if I deem it appropriate, I will edit and publish it. Here's an example from Leandro Caniglia, President of FAST: Extending the Smalltalk Syntax <https://smalltalk.tech.blog/2020/01/20/extending-the-smalltalk-syntax/>. Articles should serve to showcase why Smalltalk is such a great language. If possible, an accompanying eye-catching feature image would be nice. (If you look at the other posts, you'll see images of a Maserati and a Tesla!) I would prefer the article submissions to be in LibreOffice format. It would make it easier for me to edit. Thanks, Richard

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Workspace with reliable save feature
by HilaireFernandes Jan. 26, 2020

Jan. 26, 2020

Hi, Do we have an external workspace with a deterministic save feature. I looked at the catalog but found none, Both Workspace and Playground fall short. Workspace save file with 0 byte of content! Playground, with my experience with student, is absolutely not reliable to save script, its auto-save feature always results in lost of code. Particularly when combined with its rename and its inexplicit save behaviour. It is not practical to edit script and save code. I will start a second round of coding with students (12-14 yrs old) and I need them to save their code. The only viable option I see is to ask them to copy and to past their code in an external editor ! It will be a mess for sure and waste of time and energy. Any alternative idea or option I failed to see ? Hilaire ----- http://drgeo.eu -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Re: [Pharo-users] Pharo image processing library
by Pablo Navarro Jan. 26, 2020

Jan. 26, 2020

I'll work on those tests and then we'll do the subclass for image processing. :) I'm very happy to contribute to this project. Pablo. El dom., 26 ene. 2020 12:08, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> escribiÃ³: > Pablo > > if you are interested I would like to increase the tests around Form. > The three that exist are in FormTest and to a certain extent to BitBltTest. > If you write tests I will happily review and integrate in the system. > ( I will see if I can hijack some time during a boring meeting to produce > some more). > > I also check the reference to Form and clearly the class Form itself > refers too much to it. > Now with more tests we would be more confident to change. > > > S. > > > On 25 Jan 2020, at 17:41, Pablo Navarro <pablo1n7(a)gmail.com> wrote: > > Hi everyone! Thanks for the comments, I don't create a repository yet > because, in this first version, I just wanted to try if it was possible, so > only create a Form subclass and add three methods. > > Form subclass: #ImageForm > instanceVariableNames: 'mode' > classVariableNames: '' > package: âSmallImage' > > ââ> > > + aImage > "add two image and return a new ImageForm" > |aImageResult| > > aImageResult := self deepCopy. > > 0 to: self width do:[:x| 0 to: self height > do:[:y| > |aPoint aColorA aColorB| > aPoint := (Point x: x y: y). > aColorA := aImageResult colorAt: aPoint. > aColorB := aImage colorAt: aPoint. > aImageResult colorAt: aPoint put: aColorA + aColorB. ]]. > ^ aImageResult > > â-> > > show: anTitle > "Show a image in a window, scale the image to 500" > |im| > im := (ImageMorph withForm: (self scaledIntoFormOfSize:500) ). > im withSnapshotBorder. > im borderWidth: 5. > im color: (Color gray). > im openInWindowLabeled: (anTitle,' | mode: ', self mode asLowercase, '| ', > self shape). > > -â> > > > The first problem I found was the class Form return 'Form new' and not > 'self class new' so I had to create two class method (in ImageForm): > > newFrom: aForm mode: aMode > "create an ImageForm from to a Form object." > | aImage| > > aImage := self new. > aImage copyFrom: aForm. > aImage mode: aMode. > ^ aImage. > > â> > > open: aFileName > âOpen a image.â > | aImage aForm| > aForm := ImageReadWriter formFromFileNamed: aFileName. > aImage := self newFrom: aForm mode: âARGBâ. > ^ aImage. > > â> > > > I think that the methods (+ and show) should be directly in the class Form > but I didn't want to change the original. If you think it's okay, I can > continue working and this week upload to github with their respective tests. > > P.S. sorry for my limited English. > > > > > Best Regards Pablo. > El 25 de ene. de 2020 12:10 -0300, StÃ©phane Ducasse < > stephane.ducasse(a)inria.fr>, escribiÃ³: > > what I always find strange is that people do not invest in tests for > domains that are super nice to testâ¦. > > S. > > On 25 Jan 2020, at 16:04, Serge Stinckwich <serge.stinckwich(a)gmail.com> > wrote: > > You may have a look to Cuis library : > https://github.com/Cuis-Smalltalk/Numerics > There is an image analysis package. > We have some plan in PolyMath to port it: > https://github.com/PolyMathOrg/PolyMath/issues/158 > > Best, > > On Fri, Jan 24, 2020 at 11:20 PM Pablo Navarro <pablo1n7(a)gmail.com> wrote: > >> Hi everyone! >> >> Iâm searching for one library for image processing in Pharo. I couldn't >> find anything (only wrappers) so I tried programming one for basic >> operations (sum, >> subtraction) with images using class âFormâ. >> >> What do you think about this? >> >> >> For providing a context, I'm studying a PhD. in image processing, but all >> of the operations that I do, do it in Python. I try using Pharo for more >> fun :D. >> >> Best Regards Pablo. >> > > > -- > Serge Stinckwic > âhâ > > Int. Research Unit > on Modelling/Simulation of Complex Systems (UMMISCO) > âSorbonne University > (SU) > French National Research Institute for Sustainable Development (IRD)â > U > âniversity of YaoundÃ© Iâ, Cameroon > "Programs must be written for people to read, and only incidentally for > machines to execute." > https://twitter.com/SergeStinckwich > â > > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr / http://www.pharo.org > 03 59 35 87 52 > Assistant: Julie Jonas > FAX 03 59 57 78 50 > TEL 03 59 35 86 16 > S. Ducasse - Inria > 40, avenue Halley, > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France > > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr / http://www.pharo.org > 03 59 35 87 52 > Assistant: Julie Jonas > FAX 03 59 57 78 50 > TEL 03 59 35 86 16 > S. Ducasse - Inria > 40, avenue Halley, > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France > >

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ByteArray for UDP datagram
by HilaireFernandes Jan. 26, 2020

Jan. 26, 2020

Hello, I want to fill a byte array, but this code does not work: | packet | packet := ByteArray streamContents: [:str | str nextPut: 16r02; "TOSERVER_INIT" nextPut: 28; "SER_FMT_VER_HIGHEST_READ" uint16: 0; "NETPROTO_COMPRESSION_NONE" uint16: 37; "CLIENT_PROTOCOL_VERSION_MIN" uint16: 38; "LATEST_PROTOCOL_VERSION" nextPutAll: 'Player'. "Player name" ]. packet contents nor this variant: | packet | packet := OrderedCollection streamContents: [:str | str nextPut: 16r02; "TOSERVER_INIT" nextPut: 28; "SER_FMT_VER_HIGHEST_READ" uint16: 0; "NETPROTO_COMPRESSION_NONE" uint16: 37; "CLIENT_PROTOCOL_VERSION_MIN" uint16: 38; "LATEST_PROTOCOL_VERSION" nextPutAll: 'Player'. "Player name" ]. (ByteArray withAll: packet contents) inspect Given the packet must to be filled with byte, short, double, string, what is the best/neat way to prepare packet for datagram? Thanks Hilaire ----- http://drgeo.eu -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Willow documentation
by TomaÅ¾ Turk Jan. 24, 2020

Jan. 24, 2020

Dear all, I'm trying out Willow which looks very interesting, however I'm struggling with simple examples ... I basically follow the blogs (here <https://medium.com/mercap-tech-blog/willow-introduction-d498e198dd4a>). I loaded Willow with Bootstrap and prepared the To-Do app as described in blog series. This works OK, however when I try to do something more, like button := AsynchronicButtonWebView labeled: 'Now it''s time to click'. button onTrigger executeOnClient: [ :canvas | canvas javascript alert: 'You just clicked a button' ] the browser's javascript gives no response, and its console reports some errors: It looks like problems with libraries. I checked the examples in WillowPlayground (which works OK, BTW), and found out that some basic things are way richer than described in the blogs. For instance, component supplier is not just componentSupplierForApplication ^ Bootstrap4ComponentSupplier online as in the blog, but: componentSupplierForApplication ^ BootstrapComponentSupplier withBootstrapLibrary: (self deploymentMode libraryFor: Bootstrap3MetadataLibrary) withoutOptionalTheme selectLibrary: ((self deploymentMode libraryFor: BootstrapSelectLibrary) using: self language) datepickerLibrary: ((self deploymentMode libraryFor: BootstrapDatepickerLibrary) using: self language) typeaheadLibrary: (self deploymentMode libraryFor: BootstrapTypeaheadLibrary) new My question is - is there a better documentation available for Willow? It's quite hard to study all bits and pieces from scratch. The second question is about the suggested "architecture" or design pattern that should be followed when using Willow. The blog mixes Seaside components (e.g. #PendingTask as a subclass of WAPainter) that engages Seaside rendering elements (e.g. html paragraph:) on one hand, with the components supplier's components (e.g. singleLineTextField ...) implemented directly in the Willow Application on the other hand. This probably isn't the way things should be done :-) Best wishes, Tomaz

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spec 2 documentation
by Steve Quezadas Jan. 24, 2020

Jan. 24, 2020

guys, is there any "official" documentation on spec 2? I found a video on youtube, a slide deck from a presentation, and this github page: https://github.com/dionisiydk/Spec2 It seems to have some sort of integration with gtk, but not too much documentation. - Steve

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Extracting MP3 metadata
by sergio ruiz Jan. 24, 2020

Jan. 24, 2020

One of the projects I am working on requires the reading of mp3 metadata. I see this is covered all over the place in different languages, but I donât see one for Pharo/Smalltalk. Does anyone know off hand of something like this? Would it be worthwhile to do something like this in Smalltalk, or would it be a better idea to find and executable somewhere, run it, and parse the data there? Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: https://pgp.key-server.io/pks/lookup?op=get&search=0x69B08F58923AB3A2 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV @sergio_101@mastodon.social https://sergio101.com http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

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