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Re: creating a subclass in system browser

by Russ Whaley

Can you send a screenshot of the plus button? I'm using v9 on MacOS and I don't see a class + button... On Tue, Apr 27, 2021 at 9:47 AM kmo <voxkmp(a)gmail.com> wrote: > Doing it by hand is fiddly and error-prone. I know - because that's the > way I > used to do it before I realised that the plus button at the top of the > browser bottom panel did it for me. (I had no idea that there was also a > menu option on the refactorings menu). I think you might find the button to > be the better way - I did. > > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > -- Russ Whaley whaley.russ(a)gmail.com

April 27, 2021

Re: Announcements - and whether its bad to check if a subscription would be handled?

by Tim Mackinnon

>From my rather long ramble below - I am still curious if its distasteful to have a method on Announcer hasSubscriptionsHandling: anAnnouncement "Answer true if I have any subscribers to anAnnouncement" ^(registry subscriptionsHandling: anAnnouncement ) notEmpty Tim On Thu, 22 Apr 2021, at 11:34 PM, Tim Mackinnon wrote: > 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 > >

April 27, 2021

Re: creating a subclass in system browser

by kmo

Doing it by hand is fiddly and error-prone. I know - because that's the way I used to do it before I realised that the plus button at the top of the browser bottom panel did it for me. (I had no idea that there was also a menu option on the refactorings menu). I think you might find the button to be the better way - I did. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

April 27, 2021

Re: creating a subclass in system browser

by Russ Whaley

Now I'm wondering if I'm doing something wrong, or short-circuiting the correct approach... When I want to subclass - I simply select the class, and update the class definition page - moving the subclass name (which is the current class) to the class section, and replacing the subclass name with my new subclass name. I can also take care of instance and class variables I need... just save and everything seems to work just fine. Is there a reason to need to do this with a menu? Many times with menu options I'm unclear WHAT it's operating ON :) Nice to know there are multiple ways to get things done in Pharo!! On Tue, Apr 27, 2021 at 8:43 AM kmo <voxkmp(a)gmail.com> wrote: > I'm not surprised you missed it. I think it's not very intuitive having it > on > the refactoring sub-menu - especially when you already have "new class" on > the right click menu when you select a class. Why not have "create > subclass" > there as well? > > By the way, did you have trouble working out the "normal" way of creating a > subclass? You select the class definition tab in the browser bottom panel > and press the + (plus) button. It took me ages and ages to work that out. > Am > I just slow or is that also counter-intuitive? > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > -- Russ Whaley whaley.russ(a)gmail.com

April 27, 2021

Re: creating a subclass in system browser

by Sanjay Minni

No, I was not aware of the "+" in class definition tab. actually it's not there (yet) in Pharo 9 Win 64 which I am using. On Tue, 27 Apr 2021 at 18:13, kmo <voxkmp(a)gmail.com> wrote: > I'm not surprised you missed it. I think it's not very intuitive having it > on > the refactoring sub-menu - especially when you already have "new class" on > the right click menu when you select a class. Why not have "create > subclass" > there as well? > > By the way, did you have trouble working out the "normal" way of creating a > subclass? You select the class definition tab in the browser bottom panel > and press the + (plus) button. It took me ages and ages to work that out. > Am > I just slow or is that also counter-intuitive? > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >

April 27, 2021

Re: creating a subclass in system browser

by kmo

I'm not surprised you missed it. I think it's not very intuitive having it on the refactoring sub-menu - especially when you already have "new class" on the right click menu when you select a class. Why not have "create subclass" there as well? By the way, did you have trouble working out the "normal" way of creating a subclass? You select the class definition tab in the browser bottom panel and press the + (plus) button. It took me ages and ages to work that out. Am I just slow or is that also counter-intuitive? -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

April 27, 2021

Re: creating a subclass in system browser

by Sanjay Minni

Thanks Sorry I missed it. (I did not expect it in refactorings) Noury Bouraqadi-2 wrote > It's already available. > > On Apr 27 2021, at 1:03 pm, Sanjay Minni < > sm@ > > wrote: >> 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 >> > > > > Screenshot 2021-04-27 at 13.18.24.png (142K) > <http://forum.world.st/attachment/5129178/0/Screenshot%202021-04-27%20at%2013.18.24.png> ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

April 27, 2021

Re: creating a subclass in system browser

by Noury Bouraqadi

It's already available. On Apr 27 2021, at 1:03 pm, Sanjay Minni <sm(a)planage.com> wrote: > 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 >

April 27, 2021

creating a subclass in system browser

by Sanjay Minni

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

April 27, 2021

Re: Mooc on Advanced OO design looking for interested teachers.

by Offray Vladimir Luna CÃ¡rdenas

StÃ©phane, We, at our local hackerspace maybe interested in using your contents for our workshops. But, itsÂ a pretty informal curriculum and is project/problem oriented, so we may not cover all topics or even approach them in order. Thanks for all your work. Offray On 23/04/21 5:41 a.Â m., StÃ©phane Ducasse wrote: > Hello > > Iâm starting to write a Mooc on Advanced OO design.Â > 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.Â > It will help me for a funding agency Iâm applying to. > > S.Â > > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr <http://stephane.ducasse.free.fr> / > http://www.pharo.org <http://www.pharo.org>Â > 03 59 35 87 52 > Assistant: Aurore DalleÂ > FAX 03 59 57 78 50 > TEL 03 59 35 86 16 > S. Ducasse - Inria > 40, avenue Halley,Â > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France >

April 27, 2021