August 2011 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Tree-like workspace
by Marcus Denker Aug. 4, 2011

Aug. 4, 2011

On Aug 3, 2011, at 11:09 PM, Offray Vladimir Luna CÃ¡rdenas wrote: > > > Ps: there also a lot of good blogs in the Smalltalk noosphere. May be in the links of the Pharo page we should put this social part of the project and community. > Yes, good idea. Do you have a list? Marcus -- Marcus Denker -- http://marcusdenker.de

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Re: [Pharo-users] PBE, System Browser, OmniBrowser2
by Marcus Denker Aug. 4, 2011

Aug. 4, 2011

On Aug 4, 2011, at 10:29 AM, Sebastien Bigaret wrote: > > > 1. Creating a package and putting categories in it > > I've not seen anything about 'packages' within the OBSystemBrowser. > What I've done is > - open the Monticello Browser > - create the package PBE-LightsOut there > - back in the system browser, create the category 'PBE-LightsOut' > > and the category PBE-LightsOut is automatically assigned to the > correct package (same goes for any categories whose names start with > 'PBE-LightsOut') > > As far as I understand "Versioning your code with Monticello" (PBE v2 > / drafts) this is the correct way of doing it, however I'd be grateful > if someone could confirm... or correct me. The experimental OB browser had direct support for Monticello. The current Browser(s) do not. So you need to use the "Monticello Browser" to add packages. This will change in the future again... > > 2. Trying to install OmniBrowser2 > OB2 is not maintained and therefore does not run on newer versions of Pharo. Marcus -- Marcus Denker -- http://marcusdenker.de

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Re: [Pharo-users] PBE, System Browser, OmniBrowser2
by Marcus Denker Aug. 4, 2011

Aug. 4, 2011

On Aug 4, 2011, at 11:44 AM, Sebastien Bigaret wrote: > > Thank you StÃ©phane and Marcus for your answers, it makes things clear. > I'll use PBE.image for PBE and make my own experiments in a separate 1.3. > > Just to be sure, a naive question: >> Once you are familiar with the system, take a 1.3 image with the dev tools loaded for you. > > Does it mean: download the 1.3 here > http://www.pharo-project.org/pharo-download > or is there a specific image w/ more dev. tools that I missed? We need to do an official release of 1.3 and update the website... this will happen this week. Until than, it's here: https://pharo-ic.lille.inria.fr/hudson/job/Pharo%201.3/ -- Marcus Denker -- http://marcusdenker.de

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PBE, System Browser, OmniBrowser2
by Sebastien Bigaret Aug. 4, 2011

Aug. 4, 2011

Hi all, I've just beginning to learn Smalltalk & Pharo for some hours, and I already have some questions. At the very beginning, differences can be noticed between the browser exposed in PBE and the one exposed in Pharo v1.2.2. I've seen Marcus' answer to a similar question here: http://lists.gforge.inria.fr/pipermail/pharo-users/2011-August/002699.html and while "it works" (tm) I prefer starting my journey with the latest stable version of Pharo, esp. if as said, a *lot* of things have been changed and improved; I start experimenting stuff of my own while reading tutorials and PBE in particular. So I have two questions. 1. Creating a package and putting categories in it I've not seen anything about 'packages' within the OBSystemBrowser. What I've done is - open the Monticello Browser - create the package PBE-LightsOut there - back in the system browser, create the category 'PBE-LightsOut' and the category PBE-LightsOut is automatically assigned to the correct package (same goes for any categories whose names start with 'PBE-LightsOut') As far as I understand "Versioning your code with Monticello" (PBE v2 / drafts) this is the correct way of doing it, however I'd be grateful if someone could confirm... or correct me. 2. Trying to install OmniBrowser2 Just by curiosity, I tried to install OmniBrowser2 in Pharo v1.2.2. Using the halo I inspect it on PBE.image and found out that it was a SystemWindow using model: O2SystemBrowser within category 'O2-Enhancements-PackageBrower'. I eventually found out that it could be found at squeaksource, so I followed the instructions at: http://www.squeaksource.com/@9DGVYh5n2jIJBj2R/bHwV8FLI Alas, after doing it, this somehow breaks things: - the O2 can't be opened, exception: - even the What did I miss? Is there a missing dependency not handled by monticello? Or is there a serious incompatibility w/ pharo v1.2.2? NB: this is just out of curiousity, I do not *need* it, the only reason why I'm trying such a thing then asking for an explanation when it fails is that it helps me understand things better. However I have the feeling that it's too early for me to ask such things, so do not hesitate to simply answer to come back after having read the appropriate documents! A last question (related to the previsou one about O2): When inspecting morphs in PBE.image we get a SystemWindow w/ model: an O2PackageBrowser, which shows image thumbnails next to the morph, submorphs etc. If it is possible to install O2 on Pharo v1.2.2, will we get it as well? (this was my initial motivation for trying to install O2). Thanks in advance for any answer! BTW: since I will read the entire PBE, is it worth that I collect and document the differences on the fly and share it here? __ SÃ©bastien.

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Tree-like workspace
by Offray Vladimir Luna CÃ¡rdenas Aug. 3, 2011

Aug. 3, 2011

Hi all, I'm reading with great joy, various pharo/smalltalk related books to get a glimpse of what is available. I started with PBE and almost finished, then the Seaside Tutorial by HPI and the Moose. I'm just browsing them and make some things here and there using the Pharo image and workspaces to create documentation. Now I'm reading the Master Thesis "Scripting Browsers with Glamour" by Phillip Bunge and as I read about MVC this part: Reenskaug, however, never intended for the breaking of encapsulation that the pattern promotes. He wrote later that the âtop level goal was to support the userâs mental model of the relevant information space and to enable the user to inspect and edit this information.â I think that I want the same: support my own mental model when I'm exploring Pharo/Smalltalk. I have been a long user of Leo[1] mostly for documentation related matters and I would like to have this kind of tree-like WorkSpace in Pharo, instead of the plain one provided by default. So I will continue the reading of the thesis, but I would like to know if there is any package that can provide this support for my "leo alike mental of documentation" inside Pharo. If this is not the case, I think that trying to create this "TreeSpace" in replace of the usual WorkSpace will be my first projects. [1] http://webpages.charter.net/edreamleo/front.html Please let me know any thoughts or advices about this idea. Cheers, Offray

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Re: [Pharo-users] Pharo 1.2.1
by Marcus Denker Aug. 3, 2011

Aug. 3, 2011

Hello, The Book (sadly) describes a quite old version of Pharo (1.0 with a special Code Browser). In the meantime, we changed (improved, simplified) *a lot* of things... The problem is that it's futile to try to keep the book up to date. We will make a new one for 2.0 :-) So the best is to use the version linked from http://pharobyexample.org/ https://gforge.inria.fr/frs/download.php/27023/PBE-1.0.zip when doing exercises from the book. Marcus On Aug 3, 2011, at 5:11 PM, David Perkins wrote: > Hello! > > I just downloaded Pharo 1.2.1 on my Mac OS X.5, and am also reading a printed copy of "Pharo By Example Version 2010-02-01" in order to learn Smalltalk. > > In the Quick Tour chapter, you show the Preference Browser, but I am unable to bring this up using the System ... menu option. Does it need to be installed separately? > > Also in the Quick Tour chapter, you give an example BouncingAtomsMorph new openInWorld, which fails with the message "unknown variable BouncingAtomsMorph ...". Does this also need installation? > > Please forgive my beginner questions. > > Thanks!! > > David Perkins > kinetiks(a)verizon.net > > > -- Marcus Denker -- http://marcusdenker.de

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polymorph question
by Werner Kassens Aug. 3, 2011

Aug. 3, 2011

Hi, i have a subclass of PluggableTextFieldMorph. somewhere in the code i set its contents with: self textMorph contents: aString . this sets the textcursor to the first position and makes him unvisible. what i want to do is set the cursor to the last position and make him visible (and movable). i tried it with: self textMorph editor selectAt: textMorph asText size +1 . which does indeed what i want, but the textcurser is now unmovable by the cursor keys. how do i make the cursor movable again? i tried it eg with: self textMorph editor unselect . but of course this did not work, instead it produced an error because unselect calls markBlock: which does not exist. when i changed TextEditor>>unselect to: self editingState markBlock: self pointBlock copy the error vanished, but it did not help . Hence my question, how do i make the textcursor movable by the cursor keys? ( or move the cursor in a less intrusive way than with selectAt: ) as an aside, i noticed that focusChanged in PluggableTextFieldMorph is not called at every focus change. in my subclass i first tried changing keyboardFocusChange: in the obvious way, but interestingly this does not help in _every_ case, i needed to change navigateFocusBackward and navigateFocusForward. of course this has nothing to do with my question. werner

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Pharo 1.2.1
by David Perkins Aug. 3, 2011

Aug. 3, 2011

Hello! I just downloaded Pharo 1.2.1 on my Mac OS X.5, and am also reading a printed copy of "Pharo By Example Version 2010-02-01" in order to learn Smalltalk. In the Quick Tour chapter, you show the Preference Browser, but I am unable to bring this up using the System ... menu option. Does it need to be installed separately? Also in the Quick Tour chapter, you give an example BouncingAtomsMorph new openInWorld, which fails with the message "unknown variable BouncingAtomsMorph ...". Does this also need installation? Please forgive my beginner questions. Thanks!! David Perkins kinetiks(a)verizon.net

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Re: [Pharo-users] Finding all references to an object
by Marcus Denker Aug. 3, 2011

Aug. 3, 2011

On Aug 3, 2011, at 8:45 AM, Pat Maddox wrote: > On Aug 2, 2011, at 11:40 PM, Sean P. DeNigris wrote: > >> >> Pat Maddox-3 wrote: >>> >>> become: swaps the two objects entirely, becomeForward: "replaces" >>> references with the argument. >>> >> >> Got it, thanks. The system tests (duh) for these are really clear. > > it's generally better to use becomeForward: unless you have a really good reason to use become: and it's generally better to use anything other than becomeForward: if you can. It's what dubya would call "the nukular opshin" > And you need to take care: #become can be very slow. It can (if not both objects are in the newspace of the GC) require to scan the *whole* memory. This is slow and performance degrades the more memory you use. The "fast bulk become" that is sometimes listed as a major innovation of the squeak vm is only related to becomming multiple objects: you can become a group of objects and traverse the memory only once. But as it does scan the whole memory. The sad thing is that a fast become would be really nice for many things... e.g. if you want to do highly dynamic stuff with proxies. Making objects remote, swap them, or have proxies for objects-not-yet there (futures)... But in practice #become is far too slow for these. We should change that. Marcus -- Marcus Denker -- http://marcusdenker.de

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Finding all references to an object
by Sean P. DeNigris Aug. 3, 2011

Aug. 3, 2011

I have an object, which I want to replace with a new object everywhere it exists in the system. How do I do that? Thanks. Sean -- View this message in context: http://forum.world.st/Finding-all-references-to-an-object-tp3714218p3714218… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[PBE-Spanish] Status update 2011-07-06
by NicolÃ¡s Paez Aug. 2, 2011

Aug. 2, 2011

Hello everyone, Here is the weekly update of the Spanish translation of Pharo By Example book. During this past week, we didn't do any important progress, we still have 2 chapters under translations. We started the review process and we have publish a new preview containing 9 chapters. You can download this preview from this location: https://gforge.inria.fr/frs/download.php/28711/PBE1-Spanish-Draft-2011-07-0… Regards, Nico Saludos! Nico. blog: nicopaez.wordpress.com

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Aug. 1, 2011

This is a personal message to all the recent new list members! Yes we receive an email each time people join and leave :) We love that spam! - So first welcome! - Second do not hesitate to ask any question - Third give us feedback, we are ready to improve, fix, listen, integrate new ideas. - Fourth if you want to help, sign the license agreement, and there are a lot of simple changes to be done. We tagged some of them as easy for you :). http://code.google.com/p/pharo/wiki/HowToContribute http://code.google.com/p/pharo/issues/list (use difficult-easy). Stef

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Aug. 1, 2011

Hi guys I want to share that with you. (may be I wrote some errors that you will spot I'm sure). I wrote two chapters for the next book: float (with the participation of Nicolas Cellier) and internal number representation (two complements and friend). I wrote that also for myself so that I can forget and just read it again and could say: ok this is that simple.... :) http://stephane.ducasse.free.fr/Web/Draft/ Stef

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