February 2014 - Pharo-dev - lists.pharo.org

Shortcuts Tools/Windows

by Nicolai Hess

I miss some shortcuts for opening tools (Browser, Workspace, ...) There is an open Issue (12103) but that slice didn't work for me. And I remember there were some shortcuts for windows (switch, minimize, minimize all, ....) in older Pharo releases, only Ctrl+w for closing windows is working for me. Is this a Win32 only issue, do this shortcuts work for mac or linux? nicolai

Feb. 13, 2014

Re: [Pharo-dev] Playing an mp3

by S Krish

Why not link Pharo to mpg through NB to have all the capability required. I gave a shot at it a year back.. seems quite doable, will take about a month's effort max for anyone.. On Thu, Feb 13, 2014 at 1:35 AM, kmo <voxkmp(a)gmail.com> wrote: > As far as I know pharoSound only plays AIF and WAV. Phratch certanly has > MP3 > playing abilities - but I've only tried it on Linux and MP3s do not play. > > > > -- > View this message in context: > http://forum.world.st/Playing-an-mp3-tp4742737p4743093.html > Sent from the Pharo Smalltalk Developers mailing list archive at > Nabble.com. > >

Feb. 13, 2014

Re: [Pharo-dev] [gsoc-mentors] GSoC: call for ideas

by Goubier Thierry

Le 12/02/2014 14:40, Camille Teruel a Ã©crit : > Hello, > > Here are my proposals, > > =================================================== > Title: Generic rewriting engine > > Context: > Rewriting is an useful technique that has a lot of applications in many > functional programming language. > A rewriting engine that can rewrite arbitrary graph of objects would > have a lot of useful applications like code refactoring and migration of > instances in an alive program. > > Goal: > The goal of this proposal is to implement a rewriting engine for > arbitrary tree/graph of object. > A rewriting rule must be able to define: > - Patterns to match a part of the graph possibly including metavariables > (variables that match subparts of the matched part) > - Transformation of the matched part using the metavariables > The engine is parametrized with a set of rules an a traversal of the > graph (look at > http://www.humane-assessment.com/blog/traversal-enabled-pharo-objects for ideas). > Inspirations can be found in the pattern-matching library of Newspeak: > (http://www.hpi.uni-potsdam.de/hirschfeld/publications/media/GellerHirschfel…) > > Skill level: intermediate > Dialect: Free > Mentor: Camille Teruel I think that SmaCC 2.0.3[1] has already a language agnostic generic rewriting engine[2] (including a client/server and batch implementation if you have a few hundreds of thousands of lines to rewrite:)). [1] http://www.refactoryworkers.com/SmaCC.html [2] http://www.refactoryworkers.com/SmaCC/Transformations.html I'd say that for such things, the approach is usually to define a DSL, either the refactoring pattern language of RB, or, a bit newer, the SmPL of Coccinelle[3]. [3] http://coccinelle.lip6.fr/ The similarities between Coccinelle and RB are surprising on that level. Regards, Thierry -- Thierry Goubier CEA list Laboratoire des Fondations des SystÃ¨mes Temps RÃ©el EmbarquÃ©s 91191 Gif sur Yvette Cedex France Phone/Fax: +33 (0) 1 69 08 32 92 / 83 95

Feb. 13, 2014

Re: [Pharo-dev] [Vm-dev] Simulator in Pharo 3

by Stefan Marr

Hi Eliot: On 13 Feb 2014, at 05:46, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > Hmm. Whatâs the easiest way to map this to a Monticello mcz so I can integrate your changes back into my packages? I think the bigger question is whether you actually want to adopt those things. If you skim over the diffs on Github [1], you will probably find that most of the changes are necessary to adopt Pharo-specific API changes. Not sure what the best way forward would be to avoid having the two Squeak and Pharo flavors diverge even more. I am open to suggestions, donât have a good idea how to properly âmodularizeâ these differences myselfâ¦ Best regards Stefan [1] https://github.com/pharo-project/pharo-vm/pull/18 -- Stefan Marr INRIA Lille - Nord Europe http://stefan-marr.de/research/

Feb. 13, 2014

Re: [Pharo-dev] 100% CPU usage on image resume

by Holger Hans Peter Freyther

On Wed, Feb 12, 2014 at 03:31:56PM +0100, Sven Van Caekenberghe wrote: > Holger, Dear Sven, thanks a lot for your answer. > > The entire process list is below. My assumption is that the >>fireTimers: > > method is actually being executed. The best thing I found was to use SIGUSR1 > > to sample which processes run. My assumption is that this process runs before > > DateAndTime has been re-initialized by the SmalltalkImage. > > Now, you do agree that you are doing tricky stuff, right ? You play with timers, timestamps and delays in a process that you expect to keep running over image save/resume ;-) The timers work with absolute time and the code is working fine with GNU Smalltalk for years (with image save/resume). I think the only thing weird in Pharo is that (Delay forSeconds: 1) wait will wait forever on image resume but IIRC this is a known issue/feature. > > I think a better approach would be to subscribe to image #shutDown: and #startUp: events (trace these selectors for examples). With these you can cleanly stop your process on image save and restart it when the image resumes. I think all long running processes work that way. I have implemented your proposal and I think the problem will go away with that. To me this sounds a bit like a work-around. Do you agree? I think something like: [[DateAndTime now] repeat] fork could re-produce the issue. It can either get stuck inside the Delay created from within >>#now or in this mysterious loop that takes all the CPU and doesn't allow me to interact with the image anymore. It would be nice to fully understand why this process runs away and no other process will be scheduled. I don't know how the ProcessorScheduler works in Pharo and when/if a method is pre-empted. Is there any guarantee that the StartUpList will be executed before any other process will be scheduled? From quick browsing it seems that the SmalltalkImage code does not suspend all the other processes? kind regards holger

Feb. 13, 2014

Re: [Pharo-dev] PostID success story video

by Marcus Denker

I added it to the todoâ¦ will do it some of the next days as a news entry, too. On 13 Feb 2014, at 00:17, Torsten Bergmann <astares(a)gmx.de> wrote: > Anyone able to add the "PostID Software Development Toolkit" > (created using Pharo at Pinesoft) > > http://www.youtube.com/watch?v=Izg_Dr2Cg7k&feature=youtu.be > > to the success story page at http://www.pharo-project.org/about/success-stories >

Feb. 13, 2014

Re: [Pharo-dev] [Vm-dev] Simulator in Pharo 3

by Esteban Lorenzano

On 13 Feb 2014, at 05:46, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > Hi Stefan! > > > On Wed, Feb 12, 2014 at 12:35 PM, Stefan Marr <smalltalk(a)stefan-marr.de> wrote: > Hi: > > Below you see the result of today, the simulator for the StackInterpreter running in a Pharo 3 image. > > Fab! This is great. > > Over the last years, people have been tinkering with the simulator from time to time, but I have the feeling everyone gave up before the thing was fully functioning, and not even the trivial things have found their way back into the VM code base. > > How can anyone do anything significant with the VM without getting the simulator to work? [ ;-) ] You know about the first attempt at making a 64-bit VM for HP don't you? A nightmare tale :-). > > > I am aware that Phil was busy with it recently, but I think there was also someone else posting notes here. > > Would be great if those people could send me their change sets so that I can try getting everything working again. > > As you can see in the screenshot, the simulator loads up properly, and executes the first 10,000,000 bytecodes. > Which is enough to make it notice that a primitive fails, and to pop up the error dialog. > However, it is a Pharo 1.2 image. Later images trigger some bug, I havenât identified yet. They execute code, but donât manage to bring up the display. > > > Thanks to having a unified code repository, everything I got so far (minus a few small changes) is here: > https://github.com/smarr/pharo-vm/tree/fixes/simulator-bit-rot > > Hmm. What's the easiest way to map this to a Monticello mcz so I can integrate your changes back into my packages? give me some daysâ¦ I have in my todo list to create a jenkins job to upload the mcz to source.squeak.org (you asked for it more or less in december, but I didnât had the time until now, sorry). Esteban > > More to come soon. > Best regards > Stefan > > <simulator.jpeg> > -- > Stefan Marr > INRIA Lille - Nord Europe > http://stefan-marr.de/research/ > > > > > > > -- > best, > Eliot

Feb. 13, 2014

Re: [Pharo-dev] Simulator in Pharo 3

by Eliot Miranda

Hi Stefan! On Wed, Feb 12, 2014 at 12:35 PM, Stefan Marr <smalltalk(a)stefan-marr.de>wrote: > Hi: > > Below you see the result of today, the simulator for the StackInterpreter > running in a Pharo 3 image. > Fab! This is great. Over the last years, people have been tinkering with the simulator from > time to time, but I have the feeling everyone gave up before the thing was > fully functioning, and not even the trivial things have found their way > back into the VM code base. > How can anyone do anything significant with the VM without getting the simulator to work? [ ;-) ] You know about the first attempt at making a 64-bit VM for HP don't you? A nightmare tale :-). > I am aware that Phil was busy with it recently, but I think there was also > someone else posting notes here. > > Would be great if those people could send me their change sets so that I > can try getting everything working again. > > As you can see in the screenshot, the simulator loads up properly, and > executes the first 10,000,000 bytecodes. > Which is enough to make it notice that a primitive fails, and to pop up > the error dialog. > However, it is a Pharo 1.2 image. Later images trigger some bug, I haven't > identified yet. They execute code, but don't manage to bring up the display. > > > Thanks to having a unified code repository, everything I got so far (minus > a few small changes) is here: > https://github.com/smarr/pharo-vm/tree/fixes/simulator-bit-rot > Hmm. What's the easiest way to map this to a Monticello mcz so I can integrate your changes back into my packages? > More to come soon. > Best regards > Stefan > > > -- > Stefan Marr > INRIA Lille - Nord Europe > http://stefan-marr.de/research/ > > > > -- best, Eliot

Feb. 13, 2014

PostID success story video

by Torsten Bergmann

Anyone able to add the "PostID Software Development Toolkit" (created using Pharo at Pinesoft) http://www.youtube.com/watch?v=Izg_Dr2Cg7k&feature=youtu.be to the success story page at http://www.pharo-project.org/about/success-stories

Feb. 12, 2014

[OT] Speed of light 6-2-2014

by Torsten Bergmann

some quotes: "Borrowed largely (or shamelessly copied) from Smalltalkâs message sending syntax ..." "Categories or through runtime functions (more on those soon) itself, but Objective Câs objects pale in comparison to those of a Smalltalk-like environment, where objects are always live and browsable" "So if a successor language is to emerge, itâs got to come from elsewhere." "It seems absurd that 30 years after the Mac we still build the same applications the same ways. It seems absurd we still havenât really caught up to Smalltalk. It seems absurd beautiful graphical applications are created solely and sorely in textual, coded languages. And it seems absurd to rely on one vendor to do something about it." see http://nearthespeedoflight.com/article/2014_02_06_objective_c_is_a_bad_lang…

Feb. 12, 2014