April 2018 - Pharo-users - lists.pharo.org

libfreetype6 missing in the dependencies of ubuntu Pharo distribution

by Peter UhnÃ¡k

Hi, I've just tried installing pharo from package manager on Elementary OS, which is a ubuntu derivative. All went well, except fonts weren't working in 32 bit version, and I had to install by hand "libfreetype6:i386" ... is it missing in the dependencies? Thanks, Peter

April 26, 2018

Re: [Pharo-users] Raspberry Pi

by CÃ©drick BÃ©ler

Hi Siemen, Running pharo on Pi is on my shirt to do list ^^ Did you try : https://github.com/pharo-iot/PharoThings/blob/master/README.md The Pi vm link is different: http://files.pharo.org/vm/pharo-spur32/linux/armv6/latest.zip Never tried though ! Hth, Cedrick > Le 26 avr. 2018 Ã 21:19, Siemen Baader <siemenbaader(a)gmail.com> a Ã©crit : > > Hi, > > I'm trying to run a headless Pharo 6.1 server on a Raspberry Pi following the instructions on https://medium.com/concerning-pharo/pharo-pi-9eef257b6a21. > > The latest vm I can download is from 14 dec 2017 (see http://files.pharo.org/vm/pharoS/raspbian/) and only works with Pharo 4.0. Are Pharo 6 and 7 not being built for ARM anymore? > > Also Pharo does not want to start in headless mode as indicated by the vm's help text: > > pi@raspberrypi:~/Pharo6.1-3 $ ./PharoS -headless Pharo.image eval "5+5" > setlocale() failed (check values of LC_CTYPE, LANG and LC_ALL) > unknown option: -headless > Usage: ./PharoS [<option>...] [<imageName> [<argument>...]] > ./PharoS [<option>...] -- [<argument>...] > > ALSA <option>s: > -nomixer disable mixer (volume) adjustment > -soundcard <name> open the named sound card (default: default) > -playback <name> play to the named sound device (default: default) > -capture <name> record from the named sound device (default: default) > > X11 <option>s: > -browserWindow <wid> run in window <wid> > -browserPipes <r> <w> run as Browser plugin using descriptors <r> <w> > -cmdmod <n> map Mod<n> to the Command key > -compositioninput enable overlay window for composed characters > -display <dpy> display on <dpy> (default: $DISPLAY) > -fullscreen occupy the entire screen > -glxdebug <n> set GLX debug verbosity level to <n> > -headless run in headless (no window) mode > > <-----snip------> > > > Has anyone had success with a recent Pharo server on Pi? > > -- Siemen

April 26, 2018

Histogram for files dates and sizes

by Offray Vladimir Luna CÃ¡rdenas

Hi, I'm making a histogram of files that have the naming convention |YYYY_MM.js|, for year and month info. The image below shows what I get until now: By the way, you can run this example by loading and updating the Dataviz package [2] from [3] [2] http://mutabit.com/repos.fossil/grafoscopio/doc/tip/Packages/Dataviz/readme… [3] http://ws.stfx.eu/OUEYE943HV3Q I would like to have bars for every year of a file name in a different color (I imagine that using |#distinctColorUsing:| ) and ticks on each year. I'm seeing some examples in the image and in http://agilevisualization.com/AgileVisualization/Roassal/0104-Roassal.html, but I wonder if there is a more mature and already existing RTObject for this kind of work. Also I would like to show Y axis scale using size of files in a human friendly format (160 Kb instead of 160000.0 and so on). Any help or pointers on this is greatly appreciated. Cheers, Offray

April 26, 2018

Raspberry Pi

by Siemen Baader

Hi, I'm trying to run a headless Pharo 6.1 server on a Raspberry Pi following the instructions on https://medium.com/concerning-pharo/pharo-pi-9eef257b6a21. The latest vm I can download is from 14 dec 2017 (see http://files.pharo.org/vm/pharoS/raspbian/) and only works with Pharo 4.0. Are Pharo 6 and 7 not being built for ARM anymore? Also Pharo does not want to start in headless mode as indicated by the vm's help text: pi@raspberrypi:~/Pharo6.1-3 $ ./PharoS -headless Pharo.image eval "5+5" setlocale() failed (check values of LC_CTYPE, LANG and LC_ALL) unknown option: -headless Usage: ./PharoS [<option>...] [<imageName> [<argument>...]] ./PharoS [<option>...] -- [<argument>...] ALSA <option>s: -nomixer disable mixer (volume) adjustment -soundcard <name> open the named sound card (default: default) -playback <name> play to the named sound device (default: default) -capture <name> record from the named sound device (default: default) X11 <option>s: -browserWindow <wid> run in window <wid> -browserPipes <r> <w> run as Browser plugin using descriptors <r> <w> -cmdmod <n> map Mod<n> to the Command key -compositioninput enable overlay window for composed characters -display <dpy> display on <dpy> (default: $DISPLAY) -fullscreen occupy the entire screen -glxdebug <n> set GLX debug verbosity level to <n> -headless run in headless (no window) mode <-----snip------> Has anyone had success with a recent Pharo server on Pi? -- Siemen

April 26, 2018

Re: [Pharo-users] Showcasing Pharo, Roassal and Grafoscopio at re:publica 2018

by Alexandre Bergel

Impressive Offray! Go go go! Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On Apr 26, 2018, at 10:57 AM, Offray Vladimir Luna CÃ¡rdenas <offray.luna(a)mutabit.com> wrote: > > Hi, > > I will be showcasing Pharo, Roassal and Grafoscopio at re:publica 2018, > next week. As you may know, re:publica[2] is one of the most important > and visible media & digital culture conventions in Europe and is a good > scenario for the Pharo community. You can find details about my > participation at [1] > > [1] > https://18.re-publica.com/en/session/data-clinic-twitter-data-selfies-data-… > [2] https://18.re-publica.com/en > > I will be making intensive refactoring on the Dataviz package to create > some usual and unusual data visualizations from data exported from > Twitter, so I may be more active those days in the Discord and mailing > list channels, is some questions arise. > > Thanks in advance for the Pharo communities support. I wouldn't be able > to be there without it. > > Cheers, > > Offray > > >

April 26, 2018

Re: [Pharo-users] Showcasing Pharo, Roassal and Grafoscopio at re:publica 2018

by Sean P. DeNigris

Offray Vladimir Luna CÃ¡rdenas-2 wrote > I will be showcasing Pharo, Roassal and Grafoscopio at re:publica 2018, > next week. Wow! That's great. Any way we can follow along? e.g. live streaming, later recording Offray Vladimir Luna CÃ¡rdenas-2 wrote > I may be more active those days in the Discord and mailing > list channels, is some questions arise. Fire away. I'm sure we'll support you any way we can. Give us a heads up about the time window so we can try to be availableâ¦ ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

April 26, 2018

Showcasing Pharo, Roassal and Grafoscopio at re:publica 2018

by Offray Vladimir Luna CÃ¡rdenas

Hi, I will be showcasing Pharo, Roassal and Grafoscopio at re:publica 2018, next week. As you may know, re:publica[2] is one of the most important and visible media & digital culture conventions in Europe and is a good scenario for the Pharo community.Â You can find details about my participation at [1] [1] https://18.re-publica.com/en/session/data-clinic-twitter-data-selfies-data-… [2] https://18.re-publica.com/en I will be making intensive refactoring on the Dataviz package to create some usual and unusual data visualizations from data exported from Twitter, so I may be more active those days in the Discord and mailing list channels, is some questions arise. Thanks in advance for the Pharo communities support. I wouldn't be able to be there without it. Cheers, Offray

April 26, 2018

Re: [Pharo-users] UFFI and autoRelease

by Esteban Lorenzano

> On 26 Apr 2018, at 12:09, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: > > > > On Wed, Apr 25, 2018 at 11:07 PM, Ben Coman <btc(a)openinworld.com <mailto:btc@openinworld.com>> wrote: > > > On 25 April 2018 at 23:08, Serge Stinckwich <serge.stinckwich(a)gmail.com <mailto:serge.stinckwich@gmail.com>> wrote: > I don't understand the default > > finalizeResourceData: handle > handle isNull ifTrue: [ ^ self ]. > handle free. > handle beNull > > > when handle is an ExternaData, free is defined as in ExternalStructure class as: > > free > "Free the handle pointed to by the receiver" > (handle ~~ nil and:[handle isExternalAddress]) ifTrue:[handle free]. > handle := nil. > > Theorectical side thought. I wonder how threadsafe that code for #free is? > Sending two messages between the ~~nil test and nil-assignment > seems to leave the door open for another thread to erroneously pass the ~~nil test. > > IIUC, with an inlined #ifNotNil, the following might be safer (?) > > free > "Save handle so its nil assignment is inlined with its #ifNotNil: test, eliminating possible thread change during message sends" > |savedhandle| > handle ifNotNil: [ > savedHandle := handle. > handle := nil. > savedHandle isExternalAddress ifTrue: [ savedHandle free]. > ]. > > > > âYou don't reply to my original question, Ben :-) > > > I have another concern with UFFI ! > > When I call ffiCall: and the call returns an Opaque Object, an instance of this Opaque object is created, but apparently, > basicNew is called instead of new on the class. What is the â âintention behind ?â basicNew ensures the object is created âvirginâ, since its contents will depend on what comes from outside and not in Pharo. you can then call initialize by yourself if needed, as it happens for example in AthensCairoSurface>>extent:format: Esteban > > âThank you.â > > -- > Serge Stinckwich > UMI UMMISCO 209 (SU/IRD/UY1) > "Programs must be written for people to read, and only incidentally for machines to execute." > http://www.doesnotunderstand.org/ <http://www.doesnotunderstand.org/>

April 26, 2018

Re: [Pharo-users] Restoring a class via Epicea didn't recompile a reference?

by Tim Mackinnon

Yep - its that one. Needs fixing as it had me scratching my head in the wrong place â¦ its a bit out of my league. But we are hoping to see if we can fix a few bugs at the next UK Smalltalk meeting. Tim > On 26 Apr 2018, at 08:28, Guillermo Polito <guillermopolito(a)gmail.com <mailto:guillermopolito@gmail.com>> wrote: > > Hi, > > It looks you got bit by this issue: > > https://pharo.fogbugz.com/f/cases/21519/RemoveFromSystem-does-not-work-well… <https://pharo.fogbugz.com/f/cases/21519/RemoveFromSystem-does-not-work-well…> > > It's not particular to Epicea. There should be a better management of Undeclareds in general in all Pharo. > > On Thu, Apr 26, 2018 at 8:44 AM, Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>> wrote: > That should be âre-saved â it, the issue went away. > > > Sent from my iPhone > > On 25 Apr 2018, at 23:43, Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>> wrote: > >> Hi - I think I had this issue a long while back, but I just hit it again (desperately trying to get back into Pharo again)â¦ >> >> I was trying out Willow - and had a method like this: >> >> initializeContainerView >> >> | behaviorDetails scopeSelection | >> >> behaviorDetails := IdentifiedWebView >> forDivNamed: 'behavior-details' >> containing: WPPagerDutyUserDetailsView new >> applying: [ :div :constants | >> â¦. >> >> Where I had a class reference to: WPPagerDutyUserDetailsView, I deleted that class thinking I didnât need it and then spotted the above method referenced it and so I brought it back via Epicea. >> >> However when I ran my Willow Application, my web page was showing an error message âError, ObsoleteClassWPPagerDutyUserDetailsView does not implementâ¦.â - essentially it seemed like this method was referencing the class I had deleted and not the one I had restored. >> >> When I went back to this method and simply reserved it, everything worked properly. >> >> I recall Marcus (at the time) mentioning that the Opal compiler was supposed to detect these kinds of changes and rebind things properly - but it seems that this isnât the case - or potentially restoring something from Epicea subverts this? >> >> I can raise a bug if its genuine - but Iâm just musing on this at the moment? >> >> >> Tim > > > > -- > > Guille Polito > Research Engineer > > Centre de Recherche en Informatique, Signal et Automatique de Lille > CRIStAL - UMR 9189 > French National Center for Scientific Research - http://www.cnrs.fr <http://www.cnrs.fr/> > > Web: http://guillep.github.io <http://guillep.github.io/> > Phone: +33 06 52 70 66 13

April 26, 2018

Re: [Pharo-users] UFFI and autoRelease

by Serge Stinckwich

On Wed, Apr 25, 2018 at 11:07 PM, Ben Coman <btc(a)openinworld.com> wrote: > > > On 25 April 2018 at 23:08, Serge Stinckwich <serge.stinckwich(a)gmail.com> > wrote: > >> I don't understand the default >> >> finalizeResourceData: handle >> handle isNull ifTrue: [ ^ self ]. >> handle free. >> handle beNull >> >> >> when handle is an ExternaData, free is defined as in ExternalStructure >> class as: >> >> free >> "Free the handle pointed to by the receiver" >> (handle ~~ nil and:[handle isExternalAddress]) ifTrue:[handle free]. >> handle := nil. >> > > Theorectical side thought. I wonder how threadsafe that code for #free > is? > Sending two messages between the ~~nil test and nil-assignment > seems to leave the door open for another thread to erroneously pass the > ~~nil test. > > IIUC, with an inlined #ifNotNil, the following might be safer (?) > > free > "Save handle so its nil assignment is inlined with its #ifNotNil: > test, eliminating possible thread change during message sends" > |savedhandle| > handle ifNotNil: [ > savedHandle := handle. > handle := nil. > savedHandle isExternalAddress ifTrue: [ savedHandle free]. > ]. > > âYou don't reply to my original question, Ben :-) I have another concern with UFFI ! When I call ffiCall: and the call returns an Opaque Object, an instance of this Opaque object is created, but apparently, basicNew is called instead of new on the class. What is the â âintention behind ?â âThank you.â -- Serge Stinckwich UMI UMMISCO 209 (SU/IRD/UY1) "Programs must be written for people to read, and only incidentally for machines to execute."http://www.doesnotunderstand.org/

April 26, 2018