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

Re: [Pharo-users] Tree-like workspace

by Offray Vladimir Luna CÃ¡rdenas

Hi, El 02/08/11 15:08, StÃ©phane Ducasse escribiÃ³: > You should have a look at TreeMorph and friends. > I'm sure that you can build a leo based system. > The timeProfiler is also an example of how to use the TreeMorph > Stef > Thanks. As a newbie, I think that I'm not quite ready to browse the classes and methods and start from there, so I will use Glamour and the thesis from Phillip Bunge as an starting point for this exploration, putting questions here when they come. Having comprehensive documentation is a good thing for any complex tool we want to learn and is a joy to read things like PBE, Seaside Tutorial and the Glamour Thesis. I hope to read most docs like these and hopefully help also with its creation. Cheers, Offray 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.

Aug. 3, 2011

Re: [Pharo-users] Tree-like workspace

by Offray Vladimir Luna CÃ¡rdenas

Hi Igor, Thanks for your advice. El 02/08/11 13:04, Igor Stasenko escribiÃ³: [...] > > I think you should take a look on Nautilus project (Ben, can you > provide link/instructions?). > It using trees instead of lists to display contents in browser. [...] I will see Nautilus after reading more about Glamour. > But i puzzled, what are use of trees in workspace? Maybe you meant browser? > Because by looking at screenshots [1], it is closely similar to browser. > Workspace in smalltalk is just a text editing area where you can type > small snippets of code and then evaluate them. > I see no way where trees could be of any use in workspace. > > [1]http://webpages.charter.net/edreamleo/screen-shots.html The screenshot you find was for the use of Leo as a programming environment, but it can be also used for documentation using reStructuredText fluidly I'm kind of a compulsive documentator. I have used previously Leo mainly for documentation and not for programming because I'm not a programmer, but I think that is time to learn it and I want to do it with Pharo/Smalltalk (but keeping python in my belt anyway because of it uses in another fields of my interest). One of the things I like more about Leo is the fact that you can organize any kind of information in a integrated emergent tree and has a nice feature, called "Clones" so the same nodes in a tree can be put in an arbitrary place and be changed in synchrony, creating different ways of see the information inside the tree. In contrast with this experience, workspaces look and feel a lot plain. I'm using them to document my learning in Pharo/Smalltalk and I create different workspaces for this preliminary exploration: one for Seaside, one for Aida, One for Moose, and one for PBE. They include not only code snippets but also text, not the kind of text that you will put on classes of methods, but the one that you will put on a blog post, interchanging text and code snippets. Thats why I want to create a tree like workspace. I will keep you posted and made the usual newbie questions. Thanks, Offray

Aug. 3, 2011

Re: [Pharo-users] Pharo 1.2.1

by David Perkins

Thank you, Marcus! David Perkins kinetiks(a)verizon.net On Aug 3, 2011, at 11:18 AM, Marcus Denker wrote: > 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 > >

Aug. 3, 2011

polymorph question

by Werner Kassens

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

Aug. 3, 2011

Re: [Pharo-users] Pharo 1.2.1

by Marcus Denker

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

Aug. 3, 2011

Pharo 1.2.1

by David Perkins

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

Aug. 3, 2011

Re: [Pharo-users] Tree-like workspace

by Sean P. DeNigris

Janko MivÅ¡ek wrote: > > Because some scripts you write are usefull later too, and many times, so > it is not bad idea to save them soewhere. Not yet in some methods in > some class, but simply on workspace. And to avoid clutter of workspace > windows opened, tabs come again to rescue! > You can also use Script Manager for this, which seems similar to what the OP requested. It's annoying to work in because there is no syntax highlighting, autocomplete, or smart ({" completion, but it works fine for saving and organizing snippets. HTH, Sean -- View this message in context: http://forum.world.st/Tree-like-workspace-tp3713173p3715346.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Aug. 3, 2011

Re: [Pharo-users] Finding all references to an object

by Sean P. DeNigris

Marcus Denker-4 wrote: > > you need to take care: #become can be very slow. > Thanks for pointing that out. I'm finding a need for it, not in production, but as I eat my own dog food playing with my evolving systems, so speed is not an issue. Sean -- View this message in context: http://forum.world.st/Finding-all-references-to-an-object-tp3714218p3715339… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Aug. 3, 2011

Re: [Pharo-users] Tree-like workspace

by Janko MivÅ¡ek

S, Igor Stasenko piÅ¡e: >> But maybe you do not use the workspace the same way ;) > Same for me. I treat workspace in same way - for "fire and forget" > coding. So, personally, i don't feel much need for improving it and > introducing more than it has. > > But well, providing the way for organizing multiple workspaces could > be useful. For very organized persons :) Introduce tabs to workspace, with possibility to name them. VisualWorks has that and I actually find that useful. Because some scripts you write are usefull later too, and many times, so it is not bad idea to save them soewhere. Not yet in some methods in some class, but simply on workspace. And to avoid clutter of workspace windows opened, tabs come again to rescue! > >> >> Ben >> >> >> On Aug 2, 2011, at 9:52 PM, Ted F.A. van Gaalen wrote: >> >>> Hi there >>> >>> Well, perhaps you like this idea >>> (ideas are easier that programming, are they? :o) >>> >>> what about a workspace with >>> on the left a tree pane >>> with in the tree: saved workspaces >>> grouped under workspace "categories" >>> >>> e.g. >>> >>> aWorkspaceTree >>> +-aWorkspaceCategory >>> - aSavedWorkspace >>> - anotherSavedworkspace >>> +-yetAnotherWorkSpaceCategory >>> -yetAnotherSavedWorkspace >>> .. >>> + >>> >>> Greetings >>> Ted >>> >>> >>> >>> On Tue, Aug 2, 2011 at 8:25 PM, Benjamin >>> <benjamin.vanryseghem.pharo(a)gmail.com> wrote: >>>> >>>> On Aug 2, 2011, at 8:04 PM, Igor Stasenko wrote: >>>> >>>> On 2 August 2011 19:52, Offray Vladimir Luna CÃ¡rdenas <offray(a)riseup.net> >>>> wrote: >>>> >>>> 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. >>>> >>>> >>>> I think you should take a look on Nautilus project (Ben, can you >>>> provide link/instructions?). >>>> >>>> https://ci.lille.inria.fr/pharo/job/Nautilus/ >>>> :) >>>> The tree-based browser is Nautilus (Nautilus2 is more basic) >>>> If someone has some questions, I will be glad to answer :) >>>> >>>> Ben >>>> >>>> It using trees instead of lists to display contents in browser. >>>> >>>> But i puzzled, what are use of trees in workspace? Maybe you meant browser? >>>> Because by looking at screenshots [1], it is closely similar to browser. >>>> Workspace in smalltalk is just a text editing area where you can type >>>> small snippets of code and then evaluate them. >>>> I see no way where trees could be of any use in workspace. >>>> >>>> [1]http://webpages.charter.net/edreamleo/screen-shots.html >>>> >>>> >>>> Cheers, >>>> >>>> Offray >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> Best regards, >>>> Igor Stasenko AKA sig. >>>> >>>> >>>> >>> >> >> >> > > > -- Janko MivÅ¡ek Svetovalec za informatiko Eranova d.o.o. Ljubljana, Slovenija www.eranova.si tel: 01 514 22 55 faks: 01 514 22 56 gsm: 031 674 565

Aug. 3, 2011

Re: [Pharo-users] Finding all references to an object

by Marcus Denker

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

Aug. 3, 2011