November 2013 - Pharo-users

Re: [Pharo-users] PharoLauncher howto (was: SimplePersistence ...)

by btc＠openinworld.com

Nov. 21, 2013

Re: [Pharo-users] Any problems known here?

by Friedrich Dominicus

Norbert Hartl <norbert(a)hartl.name> writes: > Am 21.11.2013 um 06:57 schrieb Friedrich Dominicus > <frido(a)q-software-solutions.de>: > >> Norbert Hartl <norbert(a)hartl.name> writes: >> >>> Am 20.11.2013 um 18:42 schrieb Friedrich Dominicus >>> <frido(a)q-software-solutions.de>: >>> >>> I wonder if anyone has problems running a Pharo on a 64-bit System >>> (Debian) with multiarch. Because strange enough it can suddenly >>> not find >>> vm-display-X11 any more >>> >>> You need to install the desktop variant: >> I guess this will do for Ubuntu and Debian. >> >> But my probem was much more profane >> and ldd o vm-display-X11 has informed me that two libraries where not >> there. I installed them manually and after that Pharo start working >> again. >> >> So yeah ldd is your friend. >> >> But thanks for taking the time helping me. >> > Can you tell which libraries were missing? Maybe the dependencies of > the package needs to be adjusted. Can you tell which debian version > and channel (stable,â¦) you are using and what files were missing? I > think you know that but if you have the file you can find the package > that needs to be installed by doing I've not installed from the repository. I'm using Debian. And the missing libraries were libICE.so.6 and libSM.so Regards Friedrich

Nov. 21, 2013

Re: [Pharo-users] PharoLauncher howto (was: SimplePersistence ...)

by Norbert Hartl

Am 21.11.2013 um 17:01 schrieb Torsten Bergmann <astares(a)gmx.de>: > Hope this helps a little bit Yeah, thanks for your effort. I saw what you were mentioning but I needed confirmation that I didnât miss the most important feature :) Ok, so it is just not a tool for me. I have a project folders containing not only smalltalk stuff but also documentation and other files. The project folders are grouped by companies I work for. So central storage of images is a no-go. I do it the other way round. I have one directory where I symlink all current projects folders into. And this directory I put in the MacOS bar to have quick access. Then I open an image once and save a new version regularly using âsave asâ. This is a must for me because I experience a lot of image instability and the changes is broken so too easy to loose code. And it wouldnât work the way you told me because I save images often so copying _before_ opening an image is not an option. My workflow just needs manual setup of the projects folder which I would like to be solved somewhat more clever. But as I can see it now I need to stick to my stuff. Sad. I think PharoLauncher is nice. Norbert

Nov. 21, 2013

PharoLauncher howto (was: SimplePersistence ...)

by Torsten Bergmann

Norbert wrote: >How do you use it? Iâve just downloaded but failed to see how I can work with it. Warning: ======= Note that PharoLauncher is a project still in progress - I think Damien can tell you more about all the nice stuff. I just contributed some code and use it daily now. But lets continue with a short HOWTO (from my personal experience): -------------------------------------------------------------------------------------------------- PharoLauncher HOWTO: ==================== Before ====== I'm typically on Windows - in the past I had several folders with images everywhere on my HD. Sometimes with the VM, sometimes without. Lots of image searching as you can imagine. How I installed it: =================== So I downloaded a VM from http://files.pharo.org/vm/pharo/ and the latest ZIP with image and changes from https://ci.inria.fr/pharo-contribution/job/PharoLauncher/ I also put the source file into the same directory which I copied from the regular Pharo distro. All lives in one directory. I also use Linux boxes, for Ubuntu follow: http://www.pharo-project.org/pharo-download/ubuntu to get the launcher. Note that this currently will install an old image, so you have to load newer packages afterwards in the image or exchange the image. Installation will surely be simplified in the future. How I use it ============ Just launch the Pharo launcher image using the platform specific VM. Usually for "end user experience" the launcher opens in full world mode - so you see no Pharo background/world menu - only the launcher. Initially on a new computer the left side with local images is empty. On the right side are the images that are available on the web. Note that there are refresh buttons at the top of the list. Click "Refresh" in the right list to fetch all available images from the web. Select the image you like and download it. For instance you can download "Pharo3.0" -> "30587" which is the latest image as of today. Note that also the images from contribution CI are available. So you can easily download "Artefact", "Moose", ... images if you like. It will download the image into a specific directory somewhere in your users home directory. Each image gets an own folder. Use the "Show in folder" menu item if you want to open this location (may not yet work on all platforms) After download you can either "Launch" the image from the context menu in the right list. This will open the new image and close the launcher image. So you are ready to start working. What I do typically do is to "Copy" the image BEFORE I do any work and name it differently like "30587-MyStuff". Then I Launch the new copy and work with it, later throw it away or try that loading after commits works within new fresh images, ... Now === My HD is now much cleaner - all images are in a central place and I need only one icon/starter on the desk to open. PharoLauncher is also a very handy tool to download specific image update versions if you want to reproduce or fix Pharo bugs. I also associated one of the unused laptop keys with PharoLauncher - so the world of Smalltalk is just one click away... Things to know: =============== At the bottom there is a button to open a settings browser with specific settings for PharoLauncher. There is an option that enables the IDE again - so you can inspect the code or fix a bug. If it does not launch on your box then set a break in PhLImage>>launch to debug. Also note that it does not fit with the "Save as" image style - since each launcher image has to be in a new directory so far. So either use the "Copy" image, then "Launch" and then only "Save" in the target image or copy the "Saved as" image in a new folder and refresh the Launcher view on the right side. When you develop for it ======================= Either use the latest image from CI and enable the IDE as written before. You can also download the latest also in a Pharo 3.0 image. Just use the ConfigurationOfPharoLauncher from http://smalltalkhub.com/#!/~Pharo/PharoLauncher Then evaluate "PharoLauncher open". Currently it was rewritten using Spec for the UI, also all the actions are rewritten using Command Pattern so you can extend the buttons, menues if you like. Hope this helps a little bit Bye T.

Nov. 21, 2013

Re: [Pharo-users] Help with SQLite3 package

by Joachim Tuchel

Michel, Maybe you should consider using a link instead of a copy of the file. I would also suggest to only add a link within to the sqlite installation directory rather than the pharo directory. Because then pharo will find sqlite3.so as well and you have way fewer dependencies. Joachim Michel <michel.revesche(a)wanadoo.fr> schrieb: >Hi Joachim, > >I have a sqlite library in /usr/lib named 'libsqlite3.so.0.8.6'. This >directory is of course in the path. > >I made a copy of this library in my pharo2.0/bin directory and changed >its name to 'libsqlite3.so' and it fixed the problem ! > >So I got it thanks to your help and a little luck. Depending on the >linux distro this library name would differ. Somebody knows where it is >defined in the image ? > >Regards, >Michel. > >> Hi Michel, >> >> I am neither a Pharo nor a sqlite expert, but I would guess the sqlite >> library is not in your image directory or you are starting pharo >> without setting the PATH to a location that contains the sqlite library. >> >> HTH, >> >> Joachim >> >> Am 20.11.13 18:13, schrieb Michel: >>> Hi pharoers, >>> >>> I am a newbie with Pharo. >>> >>> I installed the SQLite3 package in the Pharo2 image with the >>> MetacelloConfigurationBrowser and tried a test with this script : >>> db := SQLiteConnection fileNamed: '/home/michel/base_CD/BaseCD.db'. >>> resu := db executeQuery: 'SELECT * FROM T_album'. >>> resu inspect. >>> >>> And I got this error : External module not found. >>> >>> I am on Fedora linux and I think that I should give somewhere (in >>> SQLiteReference class ?) the address of the libsqlite3.so file. Am I >>> right ? >>> >>> Kind Regards, >>> Michel. >>> >>> >> >> > > >

Nov. 21, 2013

Re: [Pharo-users] Scaled PNG image

by Igor Stasenko

On 21 November 2013 14:22, hilaire <hilaire.fernandes(a)gmail.com> wrote: > The problem is really not related to PNG bitmap as the same issue can be > exposed with simple, as in this example: > > | morph rectangle | > rectangle := RectangleMorph new color: (Color red alpha: 0.5). > morph := TransformationMorph new asFlexOf: rectangle. > morph scale: 0.7. > morph openInWorld > > > In this example, the red appears darker once the rectangle is scaled. > > Is it something related to the Blit ? I reallz don't know where to look. > > no idea.. Except that while adopting cairo surfaces i also has odd transparency issues until i realized that cairo surface stores pixel data using premultiplied alpha format,e.g.: pixelColor = (R*A, G*A, B*A, A) while bitblt assumes it is (R,G,B,A) > Hilaire > > > > -- > View this message in context: > http://forum.world.st/Scaled-PNG-image-tp4723754p4723975.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > -- Best regards, Igor Stasenko.

Nov. 21, 2013

Re: [Pharo-users] Help with SQLite3 package

by Michel

Hi Joachim, I have a sqlite library in /usr/lib named 'libsqlite3.so.0.8.6'. This directory is of course in the path. I made a copy of this library in my pharo2.0/bin directory and changed its name to 'libsqlite3.so' and it fixed the problem ! So I got it thanks to your help and a little luck. Depending on the linux distro this library name would differ. Somebody knows where it is defined in the image ? Regards, Michel. > Hi Michel, > > I am neither a Pharo nor a sqlite expert, but I would guess the sqlite > library is not in your image directory or you are starting pharo > without setting the PATH to a location that contains the sqlite library. > > HTH, > > Joachim > > Am 20.11.13 18:13, schrieb Michel: >> Hi pharoers, >> >> I am a newbie with Pharo. >> >> I installed the SQLite3 package in the Pharo2 image with the >> MetacelloConfigurationBrowser and tried a test with this script : >> db := SQLiteConnection fileNamed: '/home/michel/base_CD/BaseCD.db'. >> resu := db executeQuery: 'SELECT * FROM T_album'. >> resu inspect. >> >> And I got this error : External module not found. >> >> I am on Fedora linux and I think that I should give somewhere (in >> SQLiteReference class ?) the address of the libsqlite3.so file. Am I >> right ? >> >> Kind Regards, >> Michel. >> >> > >

Nov. 21, 2013

Re: [Pharo-users] #subStrings: alternative preserving separators

by Camillo Bruni

On 2013-11-21, at 08:18, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > Propose allSubStrings: with a couple of tests and a nice comment. > so that we improve the lib. if it forwards to split: this can be easily done (as pointed out by norbert): $| split: 'foo|bar||foobar|'

Nov. 21, 2013

Re: [Pharo-users] Help with SQLite3 package

by jtuchel＠objektfabrik.de

Hi Michel, I am neither a Pharo nor a sqlite expert, but I would guess the sqlite library is not in your image directory or you are starting pharo without setting the PATH to a location that contains the sqlite library. HTH, Joachim Am 20.11.13 18:13, schrieb Michel: > Hi pharoers, > > I am a newbie with Pharo. > > I installed the SQLite3 package in the Pharo2 image with the > MetacelloConfigurationBrowser and tried a test with this script : > db := SQLiteConnection fileNamed: '/home/michel/base_CD/BaseCD.db'. > resu := db executeQuery: 'SELECT * FROM T_album'. > resu inspect. > > And I got this error : External module not found. > > I am on Fedora linux and I think that I should give somewhere (in > SQLiteReference class ?) the address of the libsqlite3.so file. Am I > right ? > > Kind Regards, > Michel. > > -- ----------------------------------------------------------------------- Objektfabrik Joachim Tuchel mailto:jtuchel@objektfabrik.de Fliederweg 1 http://www.objektfabrik.de D-71640 Ludwigsburg http://joachimtuchel.wordpress.com Telefon: +49 7141 56 10 86 0 Fax: +49 7141 56 10 86 1

Nov. 21, 2013

Re: [Pharo-users] Cleaning up Voyage Documentation

by Johan Fabry

Hi Sabine, thank you for your observations, interesting pointers and offer for help! I will integrate as much as possible and your comments are certainly welcome! I am not so knowledgeable about data migration, I understand what you are saying but I have no deep insights. I will add something about data migration to the documentation but I think it will be brief. Greetings, On Nov 21, 2013, at 6:16 AM, Sabine KnÃ¶fel <sabine.knoefel(a)gmail.com> wrote: > Hi Johan, > > I use MongoDB and voyage for www.spesenfuchs.de and it works fine for me. > > My remarks: > > 1) you could also add VOMongoTransientDescription (see class comment) and VOMongoToManyDescription to chapter "enhancing storage". > > 2) "VORepository current reset" is imo important to know. As far as I understand, it forces to reload all objects from database. I need this after changing the VOMongo....Descriptions. > > 3) I like the possibility to have a look into the values in the database. For this, there are 2 very useful tools: http://rockmongo.com/ for windows and http://robomongo.org/ for mac. I recommend to use it. Helps a lot. > > 4) I think as far as you start to implement a real app, you need this solution to implement circular references http://forum.world.st/Voyage-Circular-references-td4691940.html#a4703493 > > 5) another not so important point > http://forum.world.st/your-opinion-about-storing-FixedDecimal-in-Mongo-td47… > > 6) I think you do also know: > http://esug.org/data/ESUG2013/4-Thu/03-ESUG2013%20-%20VoyageTutorial.pdf > http://smallworks.com.ar/web/blog > > 7) Last point, you could add some words/thoughts about data migration: what do I mean with this? Today, my model is as it is. My app runs. Data is generated in MongoDB. But after e.g. one month, I decide to change my model. Now, there are 2 possibilities: migrate all data while installing the new version or some kind of "lazy" migration at the moment, the object is loaded from mongo (I do this within the magritte description). Both has advantages and disadvantages and depends on the situation. I am interested in other opinions and solutions for this. > > If I can contribute more please tell me. > > Regards > Sabine > ---> Save our in-boxes! http://emailcharter.org <--- Johan Fabry - http://pleiad.cl/~jfabry PLEIAD lab - Computer Science Department (DCC) - University of Chile

Nov. 21, 2013

Re: [Pharo-users] Scaled PNG image

by hilaire

The problem is really not related to PNG bitmap as the same issue can be exposed with simple, as in this example: | morph rectangle | rectangle := RectangleMorph new color: (Color red alpha: 0.5). morph := TransformationMorph new asFlexOf: rectangle. morph scale: 0.7. morph openInWorld In this example, the red appears darker once the rectangle is scaled. Is it something related to the Blit ? I reallz don't know where to look. Hilaire -- View this message in context: http://forum.world.st/Scaled-PNG-image-tp4723754p4723975.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Nov. 21, 2013

Re: [Pharo-users] SimplePersistence ...

by Norbert Hartl

Am 21.11.2013 um 13:01 schrieb Torsten Bergmann <astares(a)gmx.de>: >>> Good work! I happy for each new project on pharo-contribution. >>> This is the evolution of pharo-contribution over the last year! >>> <showChart.png> >> >> Impressive. >> >> Thank you, and the rest of the team, and INRIA, for this very useful resource. > > Yes, thank you! > > And the story continues: with the PharoLauncher project [1] one is able to > easily download a CI built image and run it locally. > > > [1] https://ci.inria.fr/pharo-contribution/job/PharoLauncher/ How do you use it? Iâve just downloaded but failed to see how I can work with it. Creating an image from a template is nice. If I open an image and save it under a new name I cannot start that image from PharoLauncher, can I? What are the most prominent use cases behind PharoLauncher? thanks, Norbert

Nov. 21, 2013

Re: [Pharo-users] Problems while loading Magritte to pharo2.0

by Mariano Martinez Peck

Which version of Magritte are you using? I am downloading: spec project: 'Magritte' with: [ spec className: 'ConfigurationOfMagritte3'; loads: #('Core' 'Tests' 'Seaside'); file: 'ConfigurationOfMagritte3'; repository: 'http://www.smalltalkhub.com/mc/Magritte/Magritte3/main' ]. with version '3.0.1' and I have no problem. Cheers, On Thu, Nov 21, 2013 at 3:28 AM, Thushar G R <thushar.gr(a)gmail.com> wrote: > Hi All, > > I encounter problems while installing magritte3 from the configurations > browser. While loading, it removes #trimBoth #trimRight etc. messages from > String. I wonder if anyone else is experiencing the problem. > > > Thanks already, > > thushar > -- Mariano http://marianopeck.wordpress.com

Nov. 21, 2013

SimplePersistence ...

by Torsten Bergmann

>> Good work! I happy for each new project on pharo-contribution. >> This is the evolution of pharo-contribution over the last year! >> <showChart.png> > >Impressive. > >Thank you, and the rest of the team, and INRIA, for this very useful resource. Yes, thank you! And the story continues: with the PharoLauncher project [1] one is able to easily download a CI built image and run it locally. [1] https://ci.inria.fr/pharo-contribution/job/PharoLauncher/

Nov. 21, 2013

Re: [Pharo-users] SimplePersistence ...

by Sven Van Caekenberghe

On 21 Nov 2013, at 11:48, Camillo Bruni <camillobruni(a)gmail.com> wrote: > Good work! I happy for each new project on pharo-contribution. > This is the evolution of pharo-contribution over the last year! > <showChart.png> Impressive. Thank you, and the rest of the team, and INRIA, for this very useful resource. With the JobTemplate and all the explanations, it is all very easy to set up. Here too, it is the combination of lots of different technologies that makes all this possible. Now, in hindsight, it is hard to appreciate all the work that went into it. But it was certainly worth it. Sven > On 2013-11-21, at 08:28, Torsten Bergmann <astares(a)gmx.de> wrote: > >> ... moved to STHub http://smalltalkhub.com/#!/~TorstenBergmann/SimplePersistence with page providing some initial docu and links >> ... is now on CI https://ci.inria.fr/pharo-contribution/job/SimplePersistence/ >> ... is GREEN for Pharo20, Pharo30 with stable (3.0) and development (3.0.1) since a few minutes >> ... is loadable from Config browser in Pharo20 and Pharo3.0 >> >> Have fun >> Torsten and Sean >> >> >

Nov. 21, 2013

Re: [Pharo-users] SimplePersistence ...

by Camillo Bruni

Good work! I happy for each new project on pharo-contribution. This is the evolution of pharo-contribution over the last year! On 2013-11-21, at 08:28, Torsten Bergmann <astares(a)gmx.de> wrote: > ... moved to STHub http://smalltalkhub.com/#!/~TorstenBergmann/SimplePersistence with page providing some initial docu and links > ... is now on CI https://ci.inria.fr/pharo-contribution/job/SimplePersistence/ > ... is GREEN for Pharo20, Pharo30 with stable (3.0) and development (3.0.1) since a few minutes > ... is loadable from Config browser in Pharo20 and Pharo3.0 > > Have fun > Torsten and Sean > >

Nov. 21, 2013

Re: [Pharo-users] Any problems known here?

by Norbert Hartl

Am 21.11.2013 um 06:57 schrieb Friedrich Dominicus <frido(a)q-software-solutions.de>: > Norbert Hartl <norbert(a)hartl.name> writes: > >> Am 20.11.2013 um 18:42 schrieb Friedrich Dominicus >> <frido(a)q-software-solutions.de>: >> >> I wonder if anyone has problems running a Pharo on a 64-bit System >> (Debian) with multiarch. Because strange enough it can suddenly >> not find >> vm-display-X11 any more >> >> You need to install the desktop variant: > I guess this will do for Ubuntu and Debian. > > But my probem was much more profane > and ldd o vm-display-X11 has informed me that two libraries where not > there. I installed them manually and after that Pharo start working > again. > > So yeah ldd is your friend. > > But thanks for taking the time helping me. > Can you tell which libraries were missing? Maybe the dependencies of the package needs to be adjusted. Can you tell which debian version and channel (stable,â¦) you are using and what files were missing? I think you know that but if you have the file you can find the package that needs to be installed by doing $ dpkg -S [filename] Norbert

Nov. 21, 2013

Re: [Pharo-users] Cleaning up Voyage Documentation

by Sabine KnÃ¶fel

Hi Johan, I use MongoDB and voyage for www.spesenfuchs.de and it works fine for me. My remarks: 1) you could also add VOMongoTransientDescription (see class comment) and VOMongoToManyDescription to chapter "enhancing storage". 2) "VORepository current reset" is imo important to know. As far as I understand, it forces to reload all objects from database. I need this after changing the VOMongo....Descriptions. 3) I like the possibility to have a look into the values in the database. For this, there are 2 very useful tools: http://rockmongo.com/ for windows and http://robomongo.org/ for mac. I recommend to use it. Helps a lot. 4) I think as far as you start to implement a real app, you need this solution to implement circular references http://forum.world.st/Voyage-Circular-references-td4691940.html#a4703493 5) another not so important point http://forum.world.st/your-opinion-about-storing-FixedDecimal-in-Mongo-td47… 6) I think you do also know: http://esug.org/data/ESUG2013/4-Thu/03-ESUG2013%20-%20VoyageTutorial.pdf http://smallworks.com.ar/web/blog 7) Last point, you could add some words/thoughts about data migration: what do I mean with this? Today, my model is as it is. My app runs. Data is generated in MongoDB. But after e.g. one month, I decide to change my model. Now, there are 2 possibilities: migrate all data while installing the new version or some kind of "lazy" migration at the moment, the object is loaded from mongo (I do this within the magritte description). Both has advantages and disadvantages and depends on the situation. I am interested in other opinions and solutions for this. If I can contribute more please tell me. Regards Sabine On Wed, Nov 20, 2013 at 9:10 PM, Johan Fabry [via Smalltalk] < ml-node+s1294792n4723834h49(a)n4.nabble.com> wrote: > Hi all, > > I am building a small app that uses Voyage and MongoDB as the database, > and so I had many questions regarding how to use it and found the > documentation lacking. After conversing with Esteban, I proposed that I > improve the 'Pharo for the enterprise' chapter on Voyage, based on his > responses to my questions. (See > https://ci.inria.fr/pharo-contribution/job/PharoForTheEnterprise/lastSucces… and > > https://github.com/SquareBracketAssociates/PharoForTheEnterprise-english/tr… for > the sources) > > So a heads-up: I would like to take a 'lock' on that text for some days > (to avoid conflicts and the associated unpleasantness), as I go improving > and expanding it in the next few days. > > Also, if you have questions and/or remarks about Voyage and/or the > documentation, shoot! I will do my best to address them. > > Greetings, > > ---> Save our in-boxes! http://emailcharter.org <--- > > Johan Fabry - http://pleiad.cl/~jfabry > PLEIAD lab - Computer Science Department (DCC) - University of Chile > > > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > http://forum.world.st/Cleaning-up-Voyage-Documentation-tp4723834.html > To start a new topic under Pharo Smalltalk Users, email > ml-node+s1294792n1310670h65(a)n4.nabble.com > To unsubscribe from Pharo Smalltalk Users, click here<http://forum.world.st/template/NamlServlet.jtp?macro=unsubscribe_by_code&no…> > . > NAML<http://forum.world.st/template/NamlServlet.jtp?macro=macro_viewer&id=instan…> > -- View this message in context: http://forum.world.st/Cleaning-up-Voyage-Documentation-tp4723834p4723922.ht… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Nov. 21, 2013

Re: [Pharo-users] Help with SQLite3 package

by StÃ©phane Ducasse

On Nov 20, 2013, at 6:13 PM, Michel <michel.revesche(a)wanadoo.fr> wrote: > Hi pharoers, > > I am a newbie with Pharo. Welcome :) We are all newbies on different topics. > I installed the SQLite3 package in the Pharo2 image with the MetacelloConfigurationBrowser and tried a test with this script : > db := SQLiteConnection fileNamed: '/home/michel/base_CD/BaseCD.db'. > resu := db executeQuery: 'SELECT * FROM T_album'. > resu inspect. I do not know :) Now somebody will probably help. Now this is a cool example of why we need a test and automatic package validation. > And I got this error : External module not found. It looks like you need a plugin > I am on Fedora linux and I think that I should give somewhere (in SQLiteReference class ?) the address of the libsqlite3.so file. Am I right ? I do not know but it depends on the logic of the plugin because a plugin could have the logic to find the lib. > > Kind Regards, > Michel. >

Nov. 21, 2013

SimplePersistence ...

by Torsten Bergmann

... moved to STHub http://smalltalkhub.com/#!/~TorstenBergmann/SimplePersistence with page providing some initial docu and links ... is now on CI https://ci.inria.fr/pharo-contribution/job/SimplePersistence/ ... is GREEN for Pharo20, Pharo30 with stable (3.0) and development (3.0.1) since a few minutes ... is loadable from Config browser in Pharo20 and Pharo3.0 Have fun Torsten and Sean

Nov. 21, 2013

Re: [Pharo-users] Scaled PNG image

by StÃ©phane Ducasse

On Nov 20, 2013, at 4:54 PM, Hilaire Fernandes <hilaire.fernandes(a)gmail.com> wrote: > Hello, > > In Pharo 2.0 (true in 1.4 as well), it looks PNG bitmap are wrongly > rotated or scaled when they contain alpha transparency. > > In the example bellow with the joined bitmap, the alpha gray color are > rendered darker when the imagemorph is scaled or rotated. > > Sqeak does not suffer this problem hilaire may be you should have a look at the changes made in the graphics package of squeak to identify the change. We should have more tests. Stef > > > | dir morph transform form| > dir := FileSystem disk workingDirectory parent. > morph := (ImageReadWriter formFromFileNamed: (dir / 'bubble.png') > fullName) asMorph. > transform := TransformationMorph new asFlexOf: morph. > transform smoothingOn ; angle: Float pi / 3; scale: 1. > transform openInWorld > > > Thanks > > Hilaire > > > -- > Dr. Geo http://drgeo.eu > <bubble.png>

Nov. 21, 2013

Re: [Pharo-users] #subStrings: alternative preserving separators

by StÃ©phane Ducasse

Propose allSubStrings: with a couple of tests and a nice comment. so that we improve the lib. For me findTokens:escapedBy: is Really Bad Name looking from prehistorical ages. Stef On Nov 20, 2013, at 6:57 AM, Esteban A. Maringolo <emaringolo(a)gmail.com> wrote: > No, there is no #allSubStrings: . > > However, after your email (and having solved my issue in other way) I > just found #findTokens:escapedBy: which does exactly what I need :) > > 'foo,baz,"3,14",,foobaz' findTokens: $, escapedBy: $". -> an > OrderedCollection('foo' 'baz' '3,14' '' 'foobaz') > > Regards! > Esteban A. Maringolo > > > 2013/11/20 Joachim Tuchel <jtuchel(a)objektfabrik.de>: >> In VA, tgey just introduced allSubStrings: for this matter, because subStrings was changed to return only non-empty parts... >> Do you find that in Pharo? >> >> Joachim >> >> "Esteban A. Maringolo" <emaringolo(a)gmail.com> schrieb: >> >>> I have a string like 'foo|bar||foobar|' and I want to split it into >>> separate tokens like: >>> >>> 'foo|bar||foobar|' subStrings: $| -> #('foo' 'bar' '' 'foobar' ''). >>> >>> It is... to INCLUDE empty strings (or nil for that case) for the >>> elements between to consecutive separators. >>> >>> I can't found a method implementing this in Pharo (in Dolphin it works >>> as I expect). >>> >>> Thank you! >>> >>> Esteban A. Maringolo >>> >>> >

Nov. 21, 2013

Problems while loading Magritte to pharo2.0

by Thushar G R

Hi All, I encounter problems while installing magritte3 from the configurations browser. While loading, it removes #trimBoth #trimRight etc. messages from String. I wonder if anyone else is experiencing the problem. Thanks already, thushar

Nov. 21, 2013

Re: [Pharo-users] Any problems known here?

by Friedrich Dominicus

Norbert Hartl <norbert(a)hartl.name> writes: > Am 20.11.2013 um 18:42 schrieb Friedrich Dominicus > <frido(a)q-software-solutions.de>: > > I wonder if anyone has problems running a Pharo on a 64-bit System > (Debian) with multiarch. Because strange enough it can suddenly > not find > vm-display-X11 any more > > You need to install the desktop variant: I guess this will do for Ubuntu and Debian. But my probem was much more profane and ldd o vm-display-X11 has informed me that two libraries where not there. I installed them manually and after that Pharo start working again. So yeah ldd is your friend. But thanks for taking the time helping me. Regards Friedrich

Nov. 21, 2013

Re: [Pharo-users] [Athens] Finding if a line passes through a specific pixel .

by kilon alios

yes I found the formula for straight lines and I was wondering what was the one for bezier curves, so your reply could not have come a better moment. Thanks I will study it and implement it. On Wed, Nov 20, 2013 at 9:21 PM, Hilaire Fernandes < hilaire.fernandes(a)gmail.com> wrote: > Hello, > > You may want to calculate the distance between the mouse position and > your path (I guess a bezier curve). Then given this distance and a > tolerance to zero you decide if the mouse position is more or less on > your path. Calculating the distance you will also get for free the place > where to add a point on your path. > > http://blog.gludion.com/2009/08/distance-to-quadratic-bezier-curve.html > > Hilaire > > > Le 14/11/2013 21:07, kilon alios a Ã©crit : > > In order to do that I will have to check that the line passes through a > > specific pixel. Or to be more correct that the place that mouse has > > clicked is where my path passes through. How I do that ? Can Athens do > > that ? Can athens tell me which pixels my path passes through ? > > > > > -- > Dr. Geo http://drgeo.eu > > >

Nov. 20, 2013