September 2018 - Pharo-users

EXIF / JPEG metadata
by Alistair Grant Nov. 30, 2025

Nov. 30, 2025

Hi Everyone, As far as I can tell, JPEGReadWriter in Pharo 7 doesn't read (or write) the image metadata, e.g. title, keywords, exposure time, etc. Is anyone aware of a package that does? Thanks! Alistair

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Re: [Pharo-users] Personal wiki / information manager
by Evan Donahue Sept. 25, 2023

Sept. 25, 2023

Seems that Pharo is a magnet for this kind of project. I've been writing one as well and using it to organize my research notes. Does anyone working on personal info mgmt tools want to talk offline? I expect we're running into some of the same issues, both conceptual and technical. Evan

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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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Namespaces (was Re: Behold Pharo: The Modern Smalltalk)
by Ben Coman Dec. 24, 2019

Dec. 24, 2019

On Thu, Oct 12, 2017 at 8:52 PM, Sean P. DeNigris <sean(a)clipperadams.com> wrote: > horrido wrote > > Having separate namespaces would be really good. > > VisualWorks has them. Why not Pharo? > > I can't remember ever hearing disagreement on this subject. It seems the > only questions have been: 1) how to do them *right*, The default position would be leveraging someone else's experience, so this begs the question, what is wrong in namespace implementations in VW, Gemstone, Squeak (as our immediate neighbours, then plus Dolphin, SmalltalkX, other languages) Are there been any research papers around comparing these? I found the "Pharo on Gemstone VM" talk impressive. The "develop on Pharo deploy on Gemstone" philosophy seems like a nice synergy for Pharo's commercial future. So a naive approach would be to do namespaces just like Gemstone. Maybe its not the best, but would it be "good enough" -- perfection being the enemy of done and all that jazz. cheers -ben > and 2) where they fall on the endless prioritized todo list >

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Microsoft COM
by Ben Coman Sept. 27, 2019

Sept. 27, 2019

Hi Pablo, At work I managed to remote control Internet Explorer with Excel VBA like this... [1] http://www.automateexcel.com/vba/automate-internet-explorer and went looking for how similar might be achieved from Pharo. IIUC I discovered this would be done via Microsoft's Component Object Model, and then I bumped into your repo... [2] https://github.com/tesonep/pharo-com Could you advise the status and your plans for this? Since I see its only a few months old I've probably stumbled onto it prematurely, but I see no documentation or tests to discover how to use it. So I'll curious whether it makes something like [1] possible? And could you show how that would be done? cheers -ben P.S. For context, at work I automated IE since the intranet document management system (OpenText) does authentication via a javascript function in the browser, which doesn't compute with Microsoft's MSXML.DOMDocument component. So I use IE to do the authentication and grab the raw XML from IE to then stuff it into MSXML.DOMDocument from which I pull the data I need. But I'd love to do it with Pharo instead (if I can get IT to white list it) cheers -ben

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ZnUrls with Non-ASCII characters
by Sean P. DeNigris March 23, 2019

March 23, 2019

'https://en.wiktionary.org/wiki/prÃªt#French' asUrl ==> ZnCharacterEncodingError: ASCII character expected. Ideas? ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Calypso question: adding a context menu item
by Juraj Kubelka March 16, 2019

March 16, 2019

Hi, To implement a context menu item. I have implemented a new class: -=-=-=- CmdCommand subclass: #ClyHelloCommand instanceVariableNames: '' classVariableNames: '' package: 'Calypso-Extensionsâ -=-=-=- with methods: -=-=-=-=- ClyHelloCommand class >> #systemBrowserMenuActivator <commandActivator> ^CmdContextMenuCommandActivator byRootGroupItemFor: ClyVariableSystemBrowserContext ClyHelloCommand >> # defaultMenuItemName ^'Say Helloâ ClyHelloCommand >> # execute self inform: 'Hello' -=-=-=-=- But it does not display in the context menu. I expect it next to âGenerate accessorsâ as I took this command as an example. What do I miss? Thanks, Juraj

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Aggregation framework in MongoTalk?
by phil＠highoctane.be Feb. 18, 2019

Feb. 18, 2019

Is there anyone using the aggregation framework of MongDb through MongoTalk? It uses the aggregate() command, so I was wondering if this could be supported out of the box or if there is a need for an additional Operation. TIA Phil

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Re: [Pharo-users] adding instance variables (data) to the Object class
by Marcus Denker Jan. 13, 2019

Jan. 13, 2019

> On 6 Sep 2018, at 23:35, Petr Fischer via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Petr Fischer <petr.fischer(a)me.com> > Subject: adding instance variables (data) to the Object class > Date: 6 September 2018 at 23:35:26 CEST > To: pharo-users(a)lists.pharo.org > > > Hello! Weird question: why I can't add instance variables to the Object class (for example "oid" or something else)? Is it due to some internal (and different) VM "class layouts"? > > Or - can I inject my own information to all existing objects (any class)? > Behavior is a subclass of Object, too. So that means that you would add a ivar to all the classes, but for the VM an object can only be a class that has three ivars, and those are accessed by offset. So if you add an ivar, you shift the offset â> problem. As for âI want to add object specific stateâ: it would be nice to add an easy to use (and efficient) mechanism to do it. Marcus

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Re: [Pharo-users] SQL Server
by linkerstorm Dec. 23, 2018

Dec. 23, 2018

Thanks. Following your suggestion, I found this thread, with the same problem : https://groups.google.com/forum/#!topic/dbxtalk/xoQILQhu_mo <https://groups.google.com/forum/#!topic/dbxtalk/xoQILQhu_mo> I'm not alone anymore -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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StCAD is open source
by askoh Dec. 15, 2018

Dec. 15, 2018

Hi: I have just open source StCAD (MIT license) which has the code for freeCAD. http://askoh.com/stcad Although written in VisualWorks Smalltalk, I hope Pharo users will port it in part or whole. All the best, Aik-Siong Koh What is 'StCAD'? 'StCAD' is a basic 3D CAD framework in Smalltalk (VisualWorks 8.x). It extends the GF/ST 2D drawing framework into 3D. It also include 'StCAD-Geo' which is the 3D geometric domain, 'StCAD-Math' which provides the mathematical support for 3D CAD and motion simulation computations, and 'StCAD-Doc' which is a simple word processor. 'StCAD-Math' is also suitable for engineering, scientific and business computing. The parcels are open source using MIT License. Users can use these parcels with other private software to create 3D applications like motion simulation, finite element analysis, CAD, scientific visualization, etc. 'StCAD' allows users to create and manipulate assemblies, which are collections of 3D parts. The parts are 3D solids, which can be connected by joints, constraints, contacts, actuators, springs, dampers or forces. The parts and connections define the structure or mechanism that the assembly is meant to represent. Animation is possible, if the user can provide time series of position and orientation data for the parts. Users can also obtain output data in the form of plots and tables. XY plots can be zoomed and set to equal scales. Data series available include linear and angular displacements, velocities, accelerations and other user generated data. 'StCAD' has been used to create a freeware called 'freeCAD' which is a 3D CAD with Motion Simulation. For more information visit: http://www.askoh.com -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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[ANN] Migrated Artefact to GitHub
by Guillermo Polito Oct. 11, 2018

Oct. 11, 2018

Hi all, I've moved the Artefact library to GitHub ( https://github.com/pharo-contributions/Artefact) I've also made some changes to it in the way and made a 1.7.0 version with: - support for Pharo7 streams - a baseline So, people using Artifact, you can contribute through pull requests ^^, Guille -- Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - *http://www.cnrs.fr <http://www.cnrs.fr>* *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13

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Pharo7, consistent image freeze/deadlock on snapshotAndQuit
by Johan Brichau Oct. 7, 2018

Oct. 7, 2018

Hi, I ran into a freeze issue when trying to save and/or quit an image after loading Seaside3 and Zinc (not an infrequent combination :) The cause seems to be that terminating processes in a `shutDown` handler (called on image shutdown / snapshot) leads to a deadlock (somewhere). Both Comet and Zinc will send #terminate to a process when an image is quit or saved. If I disable one of those, the deadlock does not occur. I managed to reconstruct the issue with a simple example, attached. The attached Freeze class creates two processes (that loop with a Delay>>wait inside) in the `startUp` method (on image start). These processes are terminated by the shutdown method (called on image quit/save). However, when you try to quit and/or save the image, you will experience an image freeze. Iâm not familiar with the process scheduler, or anything else in this contextâ¦ so help would be appreciated while I try to dive further into it :) To reproduce: just file in the attached file in a Pharo7 image and try to quit. For reference, System Reporter output for my configuration. Any ideas? Cheers Johan Image ----- /Users/jbrichau/Pharo/images/Pharo 7.0 - 64bit (development version)/Pharo 7.0 - 64bit (development version).image Pharo7.0alpha Build information: Pharo-7.0+alpha.build.1131.sha.a46bfaef44ba209888c92fa0e3bd3a5e04a38c5d (64 Bit) Unnamed Virtual Machine --------------- /Users/jbrichau/Pharo/vms/70-x64/Pharo.app/Contents/MacOS/Pharo CoInterpreter VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 StackToRegisterMappingCogit VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 VM: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Thu Jun 28 14:56:30 2018 CommitHash: a8a1dc1 Plugins: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Mac OS X built on Jun 28 2018 13:07:33 UTC Compiler: 4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.31) VMMaker versionString VM: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Thu Jun 28 14:56:30 2018 CommitHash: a8a1dc1 Plugins: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git CoInterpreter VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 StackToRegisterMappingCogit VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018

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Iceberg - better control of project name?
by Tim Mackinnon Oct. 4, 2018

Oct. 4, 2018

Hi - Iâve just noticed a small issue with the latest iceberg - or at least its confusing. The Exercism project - is in a repo specified by them - its exercism/pharo.git And when I check it out using the latest iceberg using the GitHub option - I specify an Owner of âexercismâ and a project name âpharoâ to get it to properly check out. However in the iceberg window this then appears as a project called âpharoâ which is very misleading when there is the master âPharoâ project for all of pharo. (See photo) There doesnât seem to be a way to override the display of this name to make it âexercism/pharoâ - and Iâm wondering if Iceberg should handle this a bit better - either by showing {owner}/{project} or letting you give a better name in the definition to override what is shown? Tim

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Image does not start anymore
by Bernhard Pieber Oct. 2, 2018

Oct. 2, 2018

Hi, I have a Pharo 7 image which I normally start from Pharo Launcher on Windows. I think I saved it without problems. However, suddenly it stopped opening. As it contains data and some unsaved code I would hate to loose, I'd appreciate any help on how to debug a situation like this. I attached the debug log. Cheers, Bernhard

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[ANN] Success story Mobility Map
by Norbert Hartl Oct. 2, 2018

Oct. 2, 2018

As presented on ESUG here is the brief description of one of our current projects. Mobility Map ââââââ Mobility Map is a broker for mobility services. It offers multi-modal routing search enabling users to find the best travel options between locations. Travel options include car sharing, bikes, trains, busses etc. Rented cars can be offered for ride sharing on booking time letting other people find it to participate in the ride. Single travel options are combined in travel plans that can be booked and managed in a very easy way. For this project main requirements were scalability to serve a large user base and flexibility to add more additional providers to the broker. The application has been realized using web technologies for the frontend and pharo for the backend. Using a microservice architecture combined with a broker it is easy to extend the platform with additional brokers. Deployment is done using docker swarm for distributing dozens of pharo images among multiple server machines connected by a message queue for the communication. Pharo supported that scenario very well enabling us the meet the requirements with less effort. Pharo turned out to be a perfect fit to develop the application in a agile way. Small development cycles with continuous integration and continuous delivery enables fast turnarounds for the customers to validate progress. This is a screenshot of the search page for multi-modal results:

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Re: [Pharo-users] GTDocument how to
by Hilaire Sept. 30, 2018

Sept. 30, 2018

For DSL geometric sketch, I use the DrGeoCanvas class. When instantiated with the #minimal message, it holds a view with only the sketch and no widget. Therefore It is an interactive geometric sketch in a Morph, it can be obtained with the #view message. Inspected methods with the <gtView> pragma indicate a BLelement is expected as a view. Therefore, how can I embed DrGeoCanvas interactive moprh in Documenter? For example, how to deal with an example as bellow? | canvas | canvas := DrGeoCanvas minimal. canvas line: 0@0 to: 5@5. minimal view "get the view if necessary" Hilaire Le 29/09/2018 Ã 15:49, Juraj Kubelka via Pharo-users a Ã©critÂ : > > Well, there are basically two ways to start using Documenter. In both > cases it happens in the GT Inspector. > > First, you can inspect a class and write a Documenter document as a > class comment (Comment inspector tab). > Second, you can create a a-file.pillar local file and inspect it > (âa-file.pillarâ asFileReference). > > Let me know if it helps. > >> -- Dr. Geo http://drgeo.eu

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Quora: If you could create your own programming language, what would some of the features be?
by Richard Kenneth Eng Sept. 30, 2018

Sept. 30, 2018

Here's the answer I wrote: http://qr.ae/TUGKcH It would be just like Smalltalk <https://www.quora.com/Which-programming-language-is-very-interesting-but-pe…> but with optional static typing. Separate namespaces, too. It would have built-in support for multi-core concurrency. I would call it *Maxwell* (after James Clerk Maxwell). Since Smalltalk already has lambdas, Maxwell could do functional programming, too. Since Smalltalk is fully reflective, Maxwell could do metaprogramming, too, just like Lisp. Since Smalltalk has built-in support for *live coding*, Maxwell could also eliminate the traditional edit-compile-test-debug cycle that hampers most developers. *Productivity could easily double!* Maxwell would also have the option to compile to native code, C, Java, and JavaScript, so it can: 1. execute very quickly on bare metal 2. interoperate with C 3. utilize the JVM ecosystem 4. run in the web browser Maxwell would retain Smalltalkâs simplicity (for the most part) making it great for educational purposes. Finally, Maxwell would be a tightly controlled standard, thereby avoiding fragmentation. *There can be only one Maxwell.* And I would be the BDFL.

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Pharo on macOS Mojave
by Manuel Leuenberger Sept. 30, 2018

Sept. 30, 2018

Hi, Did anybody already try Pharo 6.1 on macOS Mojave? Are there any issues that would suggest not to upgrade soon? Cheers, Manuel

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Re: [Pharo-users] GTDocument how to
by Hilaire Sept. 29, 2018

Sept. 29, 2018

Likely. As GIT is integrated to Pharo, when installing the package I was expecting the local repo to be synchronized from remote master. I will delete local repos and try it again, it will take time. Hilaire Le 29/09/2018 Ã 20:43, Juraj Kubelka via Pharo-users a Ã©critÂ : > I do not know how it is possible, but your header mentions Pharo 6.1, but according to the UI you have Pharo 7. And the missing class is part of Pharo 6 only and is not required in Pharo 7. > > One reason might be that you keep locally old (2 months) GToolkit code. Can you check this? -- Dr. Geo http://drgeo.eu

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Re: [Pharo-users] GTDocument how to
by Juraj Kubelka Sept. 29, 2018

Sept. 29, 2018

To be more concrete: you might have locally an old Bloc repository. Juraj -- Juraj Kubelka El 29-09-2018, a la(s) 15:43, Juraj Kubelka via Pharo-users <pharo-users(a)lists.pharo.org> escribiÃ³: > <mime-attachment>

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Re: [Pharo-users] GTDocument how to
by Hilaire Sept. 29, 2018

Sept. 29, 2018

Nice! I got issue when installing GToolkit on P7. May be the VM is not up to the task (I took the one shipped with P6.1) but there are error message with stdio... See screenshot. Will try with a newer VM. Hilaire Le 29/09/2018 Ã 17:12, Juraj Kubelka via Pharo-users a Ã©critÂ : > I was able to install both, DrGeo and GToolkit in Pharo 7.0 image: -- Dr. Geo http://drgeo.eu

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Re: [Pharo-users] GTDocument how to
by Hilaire Sept. 29, 2018

Sept. 29, 2018

Le 27/09/2018 Ã 16:52, Juraj Kubelka via Pharo-users a Ã©critÂ : > >> On Sep 27, 2018, at 10:41, Hilaire >> <hilaire(a)drgeo.eu >> <mailto:hilaire@drgeo.eu>> wrote: >> >> Thanks for the tips. Where should be key in this text? > > What do you mean? You can edit the text as you wish. Do not forget, what is obvious for one may not be for another. I could write a book full of anecdotes with obvious features in DrGeo not so obvious for a newbie. So you write this text in playground and inspect? > > By evaluating and inspecting:Â > > -=-=-=- > GtDocumenter editorForText: 'This is a Dr. Geo tutorial. Evaluate the > following script: > > [[[ > "A Dr. Geo script that returns DrGeo canvasâÂ > ]]] > > Extensions are done using ==<gtView>== pragmas. > ' > -=-=-=- > > I have a text editor in an inspector where I can edit the Documenter > content.Â > > > Do you have the same? No, never saw that. I installed from: Metacello new Â Â baseline: 'GToolkit'; Â Â repository: 'github://feenkcom/gtoolkit/src'; Â Â load. > >> >> I went installing DrGeo along Documenter in P6.1, but it is stalled when >> installing XML dependecies (a bit old, true). >> >> Conflict with XML? or Issue with DrGeo on P6.1, may be both. > > How can I install DrGeo? I do not see a Monticello script on the > DrGeo.eu <http://DrGeo.eu> web page. I am afraid it is a bit tedious at first as it is not github based, but Launchpad. Read INSTALL file for full instruction: https://bazaar.launchpad.net/~drgeo-developers/drgeo/trunk/view/head:/src/I… > >> >> This is so fragile. > > Keep in mind that GToolkit, including Documenter, is in alpha version. I did not have GToolkit in mind when I wrote fragile, more likely the whole Smalltalk things. As I wrote in my previous email, my issue was when installing DrGeo on a P6.1 image with GToolkit already installed. I am not sure about why the process was hanging when installing XML's Dr. Geo requirement. The image is then frozen Â Ok may be I can't install DrGeo on P6.1, I still have error (screenshot). In the other I failed to installing GToolkit on P7. Hilaire -- Dr. Geo http://drgeo.eu

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Pharo 7.0 code documentation
by Trussardi Dario Romano Sept. 29, 2018

Sept. 29, 2018

Ciao, I would be interested in understanding how I can document the code directly in pharo. Can someone give me some reference - link about it? Thank you, Dario

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[Demo] Creating Bloc Widgets in Pharo
by stephan Sept. 27, 2018

Sept. 27, 2018

Bloc has improved a lot in the past year. It is ready for your experiments. Here is one of mine: https://github.com/StephanEggermont/Presentations Bloc supports the creation of beautiful GUIs, with nice interactions. This one shows a number of different ways of using drag-and-drop. https://github.com/StephanEggermont/Presentations A video demonstrating it is at: https://vimeo.com/290163891

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