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Class hierarchy diagram
by Sanjay Minni May 6, 2021

May 6, 2021

Is there any way to display the Class Hierarchy as a Diagram or a indented list. Even for all the classes in a package will do. ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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[fus] Early march sync
by hogoww May 5, 2021

May 5, 2021

Hello, In today's sync we talked about the idea, progress, paper planing. Idea: Basically the same as the previous mail so I'll not detail it here. The Slides are trying to give some details & a global view. They are, however not well ordered, and an inlining problem is missing. I'll update them quickly this afternoon, and send them back, hopefully this will help. Progress: I've done the poc to extract & graft a method. (details in slides/mail) Paper planning. 2 papers planned (possibly 3 If I were to dream a bit) First paper for GPCE on Transpiling & mutating tests. I'm putting a very short description to see that we all agree and that I'm not mistaken. The point is to test *Slang*. We are translating the tests and looking for asynchronicity for the test execution between the simulation & binary. This allows that the Slang compiler preserve the semantics. 2nd Paper on incremental compiler development see Slides & previous mail. A possible title would be: "Test driven incremental development of a compiler using a software" 3d Test prioritization Possible heuristic on test prioritization One is hinted in the last slide. Noury offered another one which is to focus on getting fast green tests. However this would require a new state of the art for a different domain. Next up: - Work on paper - Finding some mutations to apply on tests and classify them - Try to get some numbers on results ! Pierre

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Creating an SDL (OSWindow) window without showing the pharo interface
by kmo May 3, 2021

May 3, 2021

Does anyone know how to get an OSWindow window to open from Pharo without showing the pharo IDE? I thought the headless VM might do this. So I downloaded the latest headless VM and Pharo 9. Then if I issue the command line / pharo-ui Pharo.image eval OSWindowWorldMorph new open/ I get an SDL window but also the pharo user interface which I don't want. But if I try /pharo Pharo.image --no-quit eval OSWindowWorldMorph new open/ nothing happens. Pharo runs but nothing shows up. I expected just to get the SDL window. Can this be done in pharo? Anyone know the technique? -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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[ANN] Freezing Pharo 9 development right now :)
by Esteban Lorenzano May 3, 2021

May 3, 2021

Hi, So, today I was checking how much it is missing for release and what is our status, and I realized if we do not freeze now, we will never release in a reasonable time. So, even if there are a couple of cleanups and that to still do that should happen before, I will declare that Pharo 9.0 enters in freeze Pharo 9.0 right now (and I will sneak the cleanups anyway, but being more careful). What does this means? No more features, just bugfixes No more fixes of things that can wait until Pharo 10 In two weeks I will open the Pharo 10 development branch, up to then, please help fixing what's missing (which is a lot) ! Have a great weekend, cheers! Esteban

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Creating a Spec -GTK window without showing the pharo IDE
by kmo May 2, 2021

May 2, 2021

After not lookng at it for I while, I tried the Gtk Spec bindings again on my Xubuntu desktop and - this time - they worked. I was able to open a new window using Spec-Gtk, the latest headless VM and the latest Pharo 9. (Many thanks to all concerned). But I've immediately hit the same issue as I've raised before with SLD support (OSWindow) - it seems impossible to open a Gtk window without the whole Pharo IDE being shown as well. If I run the following command line - ./pharo-ui Pharo.Image eval RunGtk execute I get the Pharo IDE and a GTK window opened If I run ./pharo Pharo.Image eval RunGtk execute I just get the string RunGtk returned. No window opens. I presume this will work some time in the future. Otherwise what's the use of Spec-Gtk (or OSWindow for that matter)? You might as well just use Spec on Morphic. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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SQLite3 primitiveFailed after FFI call
by Esteban Maringolo April 30, 2021

April 30, 2021

Hi all, I'm having a strange issue when executing a query with the SQLite3 driver (via GLORP). In: SQLite3Library>>#apiPrepare: dbHandle withSQLText: anSQLText with: textSize with: sHandle with: tail "int sqlite3_prepare_v2(sqlite3*, const char*, int, sqlite3_stmt**, const char **)" ^ self ffiCall: #(int sqlite3_prepare_v2 (sqlite3* dbHandle, String anSQLText, int textSize, sqlite3_stmt** sHandle, const char** tail)) After the FFI call, I get a primitive failed error when some part of the FFI machinery sends instVarAt: index to the undefined object. This is the call stack: PrimitiveFailed(Exception)>>signal PrimitiveFailed class(SelectorException class)>>signalFor: UndefinedObject(ProtoObject)>>primitiveFailed: UndefinedObject(ProtoObject)>>primitiveFailed UndefinedObject(Object)>>instVarAt: SQLite3Library>>apiPrepare:withSQLText:with:with:with: SQLite3Library>>prepare:on:with: SQLite3PreparedStatement>>prepare: SQLite3Connection(SQLite3BaseConnection)>>prepare: SQLite3Connection>>execute:with: SQLite3Driver>>basicExecuteSQLString:binding: SQLite3Driver>>basicExecuteSQLString: PharoDatabaseAccessor>>basicExecuteSQLString: PharoDatabaseAccessor>>executeCommandUnbound: QuerySelectCommand(DatabaseCommand)>>executeUnboundIn: If I run the same query via an external SQL tool (sqlite3) it works, returning a single row with a single value as expected. What's weird is that this doesn't fail always, since it's a very common query in the app. Any ideas? Esteban A. Maringolo

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creating a subclass in system browser
by Sanjay Minni April 29, 2021

April 29, 2021

Hi is there a way I can create a subclass when I have selected a class in the System Browser class list (top 2nd panel). Couldnt see any option - Or is it that no such feature is needed ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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April 28, 2021

Hello Iâm starting to write a Mooc on Advanced OO design. It will be in the same format that the Pharo Mooc. I would like to know if some of you can be interested using part of this mooc in their curriculum. It will help me for a funding agency Iâm applying to. S. -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle 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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Announcements - and whether its bad to check if a subscription would be handled?
by Tim Mackinnon April 27, 2021

April 27, 2021

Hi everyone - Iâve always thought the article on announcements many years ago was very cool - and we donât seem to use them as much as we could (but equally they arenât a panacea to be overused everywhere either - and they do get used in Pharo to some extent). Anyway, Iâve been playing around with CodeParadise (CP is a very cool project, and Erik is very supportive and thinking about how to write web apps a different wayâ¦ Iâm fascinated), And - CP uses announcements as mechanism to send events from the View Client (in a web browser) to a Presenter on the server (which makes total sense). In taking things for a spin, I hit an interesting problem on how in a web component world, you should display a spelling test of words - e.g. SpellingTest â has many â> SpellingWord(s). Initially I bunged it all in a single presenter with its associated view, and it was a bit messy, and Erik guided me down a route (that CP nicely supports) - that my SpellingTest view should have the name/date of the test as well as an add word input field, but the list of current Words (which I had bunged into a table) - were actually more elegant as sub-components - hence a WordView - which renders a single word in a DIV, and for the edit screen I was creating, a Delete button next to the word (so you could delete it). So a 1 to many relationship essentials. This is where the announcements kick in (and lead to my ultimate question). When you click the Delete button, if I use a sub component - my view will generate a DeleteWordAnnouncement - which gets fed to my SpellingWordPresenter - however words in this sense donât naturally know their parent (the SpellingTest) - and its the parent test that has a #deleteWord: method. Iâve been taking with Erik, on different ways to elegantly handle this. a) you could change the model so words know their parent (in my case, Iâm using a 3rd party model for Flashcards, and they just donât know this - and adapting them would be a nuisance b) my TestPresenter could listen to announcements on the WordPresenter - and I could get some communications between presenters (although normally the Presenters just get events from Views, and pure domain models - so it feels a bit abnormal to consider another Presenter as a sort of model - but I could live with this c) given the composable nature of views/presenters (and CP is base on a WebComponent model) - you could bubble up Announcements, so that if an event isnât handled by a viewâs immediate presenter, you could re-route it to the parent of the View (the component owner) and see if itâs presenter could do something. I think (c) has a certain expectation to it - in fact when I converted my initial one-presenter attempt into components, I still had listener code in my TestPresenter that was expecting to get a deleteWord announcement and I was initially surprised that I wasnât getting it (as it was now just going to the Word component I had refactored out). So I wonder if others here would expect things to work this way too (and are there other examples in the wild that lead you here - or scare you away from this?). Back to my Announcement question - if C is a good idea - why doesnât the Announcer class let you check if if will handle a particular announcement? The API has #hasSubscriber: and #hasSubscriberClass: , but its missing: hasSubscriptionsHandling: anAnnouncement "Answer true if I have any subcribers to anAnnouncement" ^(registry subscriptionsHandling: anAnnouncement ) notEmpty And I am wondering if this is because it's a bad thing to expect to be able to check? In my case above, I would want to do this to know if CP should instead try announcing a message to a parent presenter because the current presenter wonât handle it. In my example above, my WordComponentView will broadcast that the delete button was clicked, but its actually a parent view which would reasonably want to listen to this kind of event and process the delete. And in a many words scenario (the Test has many words), its unrealistic for the parent to register to listen to each word component individually (in fact CP sort of hides this from you), however if you could listen to an event in your TestView, it seems to come out quite nicely - and looks a bit like this: viewCreated super viewCreated. self view when: CpNavigationAnnouncement do: [ :action | self model goto: action location ]; when: CpAddWordAnnouncement do: [ :action | self addWord: action data ]; when: CpDeleteWordAnnouncement do: [ :action | self deleteWord: action data ]. <â this is the one Iâm talking about So Iâm curious on the overall thought process here, but in particular whether I should even submit a PR on Announcer for #hasSubscriptionsHandling: ? Tim

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[ANN] Next Pharo Sprint: April 30
by Marcus Denker April 27, 2021

April 27, 2021

Next Pharo Sprint: April 30 We will organize a Pharo sprint / Moose dojo April 30 Goals of this sprint: - Fix issues from tracker https://github.com/pharo-project/pharo/issues - Especially checking older issues This is a Remote Sprint, it happens on Discord. http://pharo.org/contribute-events We have added a Board to coordinate the work: https://github.com/orgs/pharo-project/projects/9 A list of all Pharo Event of the year an be found here: https://association.pharo.org/events

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