May 2016 - Pharo-users - lists.pharo.org

Re: [Pharo-users] RT export to PDF

by Arturo Zambrano

Thanks Stephan! On Sun, May 1, 2016 at 7:24 AM, Stephan Eggermont <stephan(a)stack.nl> wrote: > On 01/05/16 04:00, Arturo Zambrano wrote: > >> Hi, >> I'm using RT on top of pharo5. >> As I need to export to pdf, I also installed >> RTPDFExporter >> and >> Artefact >> >> development versions >> >> Exporting to pdf fails with MNU RTPDFVisitor>>visitMapShape: >> >> any hint regarding this? >> > > The PDF exporter has its last updates in november, so might be slightly > out of date. When comparing RTSVGVisitor2 to RTPDFVisitor, I notice > some missing visitors. > > AFAIK, Artefact has limited bitmap support at the moment, > and uses the JPEGReadWriter instead of embedding directly. > > http://forum.world.st/PNG-in-Artefact-td4798885.html > > You need to add something like > > RTPDFVisitor>>visitBitMapShape: aBitmapShape > | s | > s := WriteStream on: ByteArray new. > > TRPlatform current pngReadWriterClass putForm: (aBitmapShape form) > onStream: s. > page add: > (PDFPngElement > from: aBitmapShape encompassingRectangle > topLeft x mm @ > aBitmapShape encompassingRectangle > topLeft y mm > dimension: aBitmapShape width mm @ > aBitmapShape height mm > fromStream: s contents readStream) > > Stephan > > >

May 2, 2016

Re: [Pharo-users] Can you help me find this info?

by Ben Coman

On Mon, May 2, 2016 at 5:30 PM, Victor RENE <victor-rene.dev(a)outlook.com> wrote: > > Hello, > > I am new to Pharo and would like to understand a few things. > I can search by myself, but I do not know the code base yet, so: > > [Questions] > Pharo vm (Cog/Spur): > Rendering loop (Whoops, I notice too late you are asking about the vm. For what its worth, I send anyway what I wrote about the image side of rendering) Within the Image, do "EllipseMorph new openInWorld" then put a "self haltOnce" in EllipseMorph>>drawOn: and select World > System > Enable halt/inspect once, then in the debugger that appears, right-click to select "Full Stack". Observe the sender chain... EllipseMorph>>drawOn: FormCanvas(Canvas)>>draw: FormCanvas(Canvas)>>drawMorph: EllipseMorph(Morph)>>fullDrawOn: FormCanvas(Canvas)>>fullDraw: FormCanvas(Canvas)>>fullDrawMorph: Observe there are three implementors of fullDrawMorph: * Canvas * AthensCanvas * AthensCanvasWrapper Canvas is the bitmap rendering. Athens is vector rendering. Scroll down the stack to see MorphicUIManager>>spawnNewProcess. and also look for it's senders. Open World > Tools > Process Browser to observe the "(40) Morphic UI Process" created by #spawnNewProcess. > and event loops. In World > Tools > Process Browser, select "(60) Input Event Fetcher Process" and browse its call stack in the top-right pane. > done with SDL2, where is the code? I'm not familiar enough to comment > Message passing, object hierarchy lookup, where is the code? https://clementbera.wordpress.com/2013/08/09/the-cog-vm-lookup/ https://clementbera.wordpress.com/category/sista/ http://www.mirandabanda.org/cogblog/2011/03/01/build-me-a-jit-as-fast-as-yo… http://www.mirandabanda.org/cogblog/on-line-papers-and-presentations/ cheers -ben

May 2, 2016

Re: [Pharo-users] What other languages can do something similar?

by Jimmie Houchin

Yes, I have had that problem in the past. But I do not recall the last time I did. And I don't remember if any time that I had an unresponsive UI that it was due to an infinite loop as described here as opposed to some other CPU intensive and possibly memory increasing bug. My example here is only for common infinite loop mistakes. Which are easy to do. Especially in languages in which you loop via your created and manually incremented index. True many can do the same in explicit special situations. In your example of an attached debugger. But does anybody run Python with Pydb as default? I have never used Pydb. Any infinite loop I created means killing the interpreter. Or any other language? Regardless it would be much less common elsewhere. And generally if available, much more awkward and inconvenient, and explicit. You have to be ready and prepared. Pharo/Smalltalk it is a way of being. :) Did Lisp when Lisp was the language and environment do such? Even if it did, I would guess that a modern Lisp such Clojure would still require attaching a debugger. Thanks. Jimmie On 05/02/2016 08:36 AM, Peter UhnÃ¡k wrote: > > I can execute foreverTrue in a Playground and when nothing returns > in an appropriate amount of time. I can stop the execution > > > Assuming the UI is responsive enough to receive the stop commandâ¦ > which (at least in my experience) is more often false than true. > > In principle any environment that has a debugger attached to the > execution (so launching from any modern IDE) should be able to do it. > But of course the developer experience is somewhere completely > different. Plus they won't ship it to production with the debugger > attached. We would. :) > > Peter > > On Mon, May 2, 2016 at 2:36 PM, Jimmie Houchin <jlhouchin(a)gmail.com > <mailto:jlhouchin@gmail.com>> wrote: > > While working on a project I made a mistake in some code. A common > mistake in most languages, a less common one in Smalltalk or > Pharo. Something similar to the below. > > foreverTrue > | index end | > > [ index < end ] whileTrue: [ > "Do something clever. > But forget to increment index." > ]. > ^ returnSomething > > > I can execute foreverTrue in a Playground and when nothing returns > in an appropriate amount of time. I can stop the execution. Fix > the bug. Try again. I lose nothing. All my data, all my image > state is still there. I do not have to do anything special to > execute foreverTrue again, but now successfully so. > > Because Pharo/Smalltalk is so much more than just a programming > language, this is possible. > > Most languages I know you would have to kill the vm and start all > over. I would have to do everything I had already done to get to > the correct state in order to execute my method. I guess many > static languages might catch the bug and not allow execution. But > I have no experience there. > > I was just curious as to what other languages, environments might > survive my mistake and allow me to gracefully correct and continue. > > I think this one of the big wins for Pharo/Smalltalk. We can > sometimes mess up and recover gracefully. > > I think small things like this should possibly be collected in a > document as to some reasons for Pharo. > > Thanks. > > Jimmie > > > >

May 2, 2016

Re: [Pharo-users] Metaprogramming facilities

by CÃ©drick BÃ©ler

Or even quicker with the shortcut CMD+H+A Cheers, CÃ©drik

May 2, 2016

Re: [Pharo-users] Metaprogramming facilities

by CÃ©drick BÃ©ler

Hi Victor, I use the refactoring facilities offered by the contextual menu when a class is selected. You should explore and try this submenus :) Cheers, CÃ©drik

May 2, 2016

Re: [Pharo-users] Metaprogramming facilities

by Guillaume Larcheveque

Select the class, right click on it: [image: Images intÃ©grÃ©es 1] 2016-05-02 17:35 GMT+02:00 Victor RENE <victor-rene.dev(a)outlook.com>: > In the TinyBlog mini-project of the MOOC, we start by creating the model. > However, since I basically finished the exercises, I wanted to go one step > further and > ask you guys, what is the correct way _not_ to write all gettters / > setters for the fields. > > > TBPost >> title > ^ title > TBPost >> title: anObject > title := anObject > TBPost >> text > ^ text > TBPost >> text: anObject > text := anObject > etc... > > > Do you do it with macros / templates / something else ? > I am having a bit of fun (although I would love that they unlock weeks 2 > to 7 for me). Thanks in advance. > > Victor RENE > Software engineer, > Game designer, Writer > > Blog: http://victor-rene.com > Projects: http://logiqub.com > > tel: +33 6 26 83 61 76 > email: victor-rene(a)outlook.com > > -- *Guillaume Larcheveque*

May 2, 2016

Metaprogramming facilities

by Victor RENE

In the TinyBlog mini-project of the MOOC, we start by creating the model. However, since I basically finished the exercises, I wanted to go one step further and ask you guys, what is the correct way _not_ to write all gettters / setters for the fields. TBPost >> title ^ title TBPost >> title: anObject title := anObject TBPost >> text ^ text TBPost >> text: anObject text := anObject etc... Do you do it with macros / templates / something else ? I am having a bit of fun (although I would love that they unlock weeks 2 to 7 for me). Thanks in advance. Victor RENESoftware engineer,Game designer, Writer Blog: http://victor-rene.comProjects: http://logiqub.com tel: +33 6 26 83 61 76email: victor-rene(a)outlook.com

May 2, 2016

Re: [Pharo-users] Failing to create a project on SmalltalkHub

by Peter UhnÃ¡k

> > > Also, they say it's possible to use Git but they don't describe the > setup. > This is indeed possible, but it may not be the simplest. Even though apart from the initial setup it behaves pretty much as normal smalltalkhub/anyothermonticellorepo, if a problem occurs it may not be the most obvious to solve. But if you are interested, here are some links to get you started https://www.youtube.com/watch?v=n2WNYDtO0cE http://blog.yuriy.tymch.uk/2015/07/pharo-and-github-versioning-revision-2.h… http://peteruhnak.com/blog/2016/03/02/moving-project-from-smalltalkhub-to-g…

May 2, 2016

Re: [Pharo-users] Failing to create a project on SmalltalkHub

by Serge Stinckwich

What is the web browser you are using ? Can you try another web browser ? Regards, On Mon, May 2, 2016 at 10:04 PM, Victor RENE <victor-rene.dev(a)outlook.com> wrote: > http://smalltalkhub.com/#!/~VictorRene > > I am trying to create a project on Smalltalk hub to save progress on the > MOOC. > But it fails with "incorrect username or password", and i can not logout. > Okay, I can probably empty my browser cache but it's still incorrect > behavior. > Also, they say it's possible to use Git but they don't describe the setup. > > Any ideas? Thanks in advance. > > > Victor RENE > Software engineer, > Game designer, Writer > > Blog: http://victor-rene.com > Projects: http://logiqub.com > > tel: +33 6 26 83 61 76 > email: victor-rene(a)outlook.com > -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

May 2, 2016

Failing to create a project on SmalltalkHub

by Victor RENE

http://smalltalkhub.com/#!/~VictorRene I am trying to create a project on Smalltalk hub to save progress on the MOOC. But it fails with "incorrect username or password", and i can not logout. Okay, I can probably empty my browser cache but it's still incorrect behavior. Also, they say it's possible to use Git but they don't describe the setup. Any ideas? Thanks in advance. Victor RENESoftware engineer,Game designer, Writer Blog: http://victor-rene.comProjects: http://logiqub.com tel: +33 6 26 83 61 76email: victor-rene(a)outlook.com

May 2, 2016