July 2015 - Pharo-users - lists.pharo.org

Spec with Roassal
by Mark Rizun July 23, 2015

July 23, 2015

Hi everyone! I'm building a ui with Spec and using Roassal view inside of my window. To embed the view I use Roassal2Spec package (RoassalModel class). When I click on element of view I want to change its color. The problem is that color changes only after you move a winodw or open another window etc. Here is an example code. Just try to click on elements and than move the window. ********************************************** ui := DynamicComposableModel new. ui instantiateModels: #( button ButtonModel view RoassalModel ). ui button label: 'I am a button'. ui extent: 600 @ 480. ui view script: [ :view :canvas | |es| es := RTEllipse new size: 20; elementsOn: (1 to: 6). view addAll: es. RTCircleLayout on: es. RTEdgeBuilder new view: view; elements: es; connectToAll: [ :value | { value + 1. (value + 1) % 6 } ]. view elements when: TRMouseClick do: [ :e | e element trachelShape color: Color red. World displayWorld. World doOneCycleNow ]. canvas camera focusOnCenter. ]. layout := SpecLayout composed newColumn: [ :col | col add: #button height: ComposableModel toolbarHeight; add: #view. ]; yourself. ui openWithSpecLayout: layout. ********************************************** Thanks Mark -- View this message in context: http://forum.world.st/Spec-with-Roassal-tp4838854.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Seeking help to resolve startup error on CI automated build
by Jigyasa Grover July 23, 2015

July 23, 2015

HiI am trying to build my first application in Pharo i.e. an offline text search application namely *searchQuick* which returns the list of file titles from the pre-loaded text files present in the resource folder when a string is searched for. You all are welcome to fork the code (https://github.com/jig08/sQuick_new) , try the infancy application and send in suggestions. Currently, I have put my application up on CI for automated build. I am currently getting a StartUp error on VERSION=development (40) The error is as follows: *The symbolic version '0.1-baseline' is not defined in ConfigurationOfsQuick_new for the current platform. Possible symbolic version values include: #(#bleedingEdge #development #stable)* I have checked ConfigurationOfsQuick_new and the corresponding method reads as follows:*------------------------------------------------------ development: spec <symbolicVersion: #'development'> spec for: #'common' version: '0.1-baseline'*.*------------------------------------------------------* It would be great if my mistake is pin-pointed and I could resolve it. Thanks and Regards Jigyasa

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[MCGitHubRepository] Seeking better options to access resources folder from github repo
by Jigyasa Grover July 23, 2015

July 23, 2015

Hi I am trying to build my first application in Pharo i.e. an offline text search application namely *searchQuick* which returns the list of file titles from the pre-loaded text files present in the resource folder when a string is searched for. You all are welcome to fork the code (https://github.com/jig08/sQuick_new) , try the infancy application and send in suggestions. So far, to access the resources folder from my github repo, I have been using the following code snippet: *----------------------------------------------------------------------------------------------------------------* *| resourceFolder resourcePath|* *MCGitHubRepository allSubInstancesDo: * * [ :repo |* * repo projectPath = 'jig08/sQuick_new' * * ifTrue: [ resourcePath := repo directory ] * * ]. * *resourceFolder := resourcePath / 'sQuick_new/resources'.* *----------------------------------------------------------------------------------------------------------------* I wanted to know a better option that could be used to access it, without checking all the entries present for a correct match i.e. not use *"**MCGitHubRepository allSubInstancesDo:"* Help Appreciated Thanks Jigyasa

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New pretty printer Blue Ink
by Franck Warlouzet July 22, 2015

July 22, 2015

Hello everyone, We just integrated Blue Ink, the new pretty printer, in the latest Pharo 5 image ! Basically what was working still is and what was not well now is. It is not yet enabled by default, we will wait for feedbacks first. If you want to try it, just type : RBProgramNode formatterClass: BIConfigurableFormatter. BIConfigurableFormatter formatAsYouReadPolicy: true Feel free to contact me via the mailing list or personnal mail if you experience a strange behavior. I tried to improve all of them but with you I am sure all the cases will be treated in an exhaustive way. Thanks for testing it, I hope it will convince you to use format as you read in Nautilus or just automatically format your code. Franck

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(Money) accounting soft in Pharo?
by Peter UhnÃ¡k July 21, 2015

July 21, 2015

Hi, is there any (double-entry) accounting software in Pharo? (Think GnuCash/KMyMoney/...) Peter

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Modeling Money Units
by Sean P. DeNigris July 21, 2015

July 21, 2015

There are several tools: Aconcagua, Money, Units; and at least two classes to overcome the imprecision of Floats: ScaledDecimal, FixedDecimal... I found one thread where Hernan said they use Aconcagua [1], another from Squeak implying that ScaledDecimal is broken [2]. A third seemed to say that FixedDecimal would be better [3], which I hadn't heard in the handful of times money has been discussed on list (usually ScaledDecimal comes up). For a simple case where someone wanted to write a small personal accounting app, which tool and which type would be the best place to start? Thanks! [1] http://forum.world.st/Money-units-tp68797p68800.html [2] http://forum.world.st/Seaside-Re-Money-ScaledDecimal-is-it-really-appropria… [3] http://forum.world.st/Pharo-dev-Monetary-package-tt4692670.html ----- Cheers, Sean -- View this message in context: http://forum.world.st/Modeling-Money-Units-tp4838614.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Re: [Pharo-users] Ephemeric Cloud - new platform to publish Pharo web applications
by Andy Burnett July 21, 2015

July 21, 2015

Mike wrote <<< Thanks for pointing this out! When websocket support is ready on the ephemeric gate I'll add a ping to API server so application will work continuously without any effort. I think conceptually it should "just work". Also I plan to have a "sticky-run" option so you can mark some of ephemerics not to go to sleep mode. What do you think? >>> That sounds like a good approach. Just to dig into this a bit more, here is our first use case. We have an iPhone/web app which is a multiuser countdown timer. The data are hosted on Firebase. The iPhone app can set the time, and control start/pause. The web apps count down by themselves, but the start/stop/reset signalling is done in real time by the Firebase server. So, if you imagine a timer that is set to run for 45 minutes, we would need to signal start to the image. That would be reflected to all connected clients via wss, and then, for example, stopped with 5 minutes to go. We would need the app to remain live whilst a timer was running. However, we don't use the timers all the time, so keeping the whole app live might burn up more of the server's resources than necessary. Cheers Andy

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Re: [Pharo-users] Ephemeric Cloud - new platform to publish Pharo web applications
by Andy Burnett July 21, 2015

July 21, 2015

Mike, that sounds really interesting. Will the instances support websocket connections, and if so, will that stop them from sleeping, i.e. if I had an app that sent out news updates via wss every 15 minutes to any listening clients, could it just continue to run, or does it have to receive a get/post request every 30 mins? Cheers Andy

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[ANN] Pharo Consortium New Academic Partner: RyCh group
by Marcus Denker July 21, 2015

July 21, 2015

The Pharo Consortium is very happy to announce that RyCh has joined the Consortium as an Academic Partner. RyCh (Robotics and Computation in Chile) is a laboratory of the Computer Science Department (DCC) of the Universidad de Chile. RyCh is a new research group, with a focus on the computational aspects of robotics, more specifically machine learning and the software engineering process of robotics. At RyCh, Pharo is the implementation technology for Live Robot Programming. About - RyCh: https://rych.dcc.uchile.cl - Pharo Consortium: http://consortium.pharo.org The goal of the Pharo Consortium is to allow companies and institutions to support the ongoing development and future of Pharo. Individuals can support Pharo via the Pharo Association: http://association.pharo.org

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where to report Telescope bugs?
by Peter UhnÃ¡k July 20, 2015

July 20, 2015

Hi, where do I report Telescope bugs? I downloaded latest TL via Pharo Launcher (build #192), but any opening/closing interaction doesn't work. 1. run TLDemos>>exampleCompositeExploringHierarchy 2. click on "+" 3. error MNU SubscriptionRegistry>>subscriptionsDo: Also does this "Work in progress" http://rmod.inria.fr/web/software/telescope/tutorial-visualization-developer mean that someone is actually working on it, or that it is planned someday = I just use the source code for the foreseeable future (or maybe if you have some internal docs available)? Thanks, Peter

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PostGIS in Pharo
by Esteban A. Maringolo July 20, 2015

July 20, 2015

Is there anybody using PostGIS in Pharo? Regards! Esteban A. Maringolo

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Multiple sockets listening on same port
by Attila Magyar July 20, 2015

July 20, 2015

Hi, A number of times I ran into the situation where I started a http server but forgot that an other one was already running. This resulted strange behavior and led to confusion. The Socket class doesn't detect that the given port is already bound to an other socket. socket1 := Socket newTCP. socket1 listenOn: 9999. socket2 := Socket newTCP. socket2 listenOn: 9999. "I expected this to fail" Both sockets are in WaitinForConnection status and isValid returns true. Is this normal? Is there a way to detect this anyway? -- View this message in context: http://forum.world.st/Multiple-sockets-listening-on-same-port-tp4838417.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Woden?
by Hilaire July 20, 2015

July 20, 2015

Hi, I want to make a demo of woden. But does not work, and I don't know why. Installed version from Smalltalkhub following instruction found there, or download directly an image from jenkins, in both case I have error when executing: WDFPSSimpleExample13 new open MNU: receiver #doSemanticAnalysisIn: is nil Thanks Hilaire PS: the Woden classes are almost completely uncommented! -- Dr. Geo http://drgeo.eu http://google.com/+DrgeoEu

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Overriding method - ExampleBuilderMorph>>#openModal:
by Jigyasa Grover July 20, 2015

July 20, 2015

Hi I have been using ExampleBuilderMorph and ExpanderMorph to build a accordion widget to display the search results of my application *searchQuick* which returns the list of file titles from the pre-loaded text files present in the resource folder when a string is searched for. You all are welcome to fork the code (https://github.com/jig08/sQuick_new) , try the infancy application and send in suggestions. As I have been using the ExampleBuilderMorph>>#openModal: to view the expanders, [ https://github.com/jig08/sQuick_new/blob/master/sQuick_new.package/PopUp.cl… LINE 33 ] I would like override this method to change the position and extent of the window which opens up because of #openModal: method. Help appreciated. Thanks Jigyasa

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Moose to analyse Java code
by Hilaire July 20, 2015

July 20, 2015

Hello, A friend told me one of his student need to understand the flow of OpenStreepMap java code. Of course I told him about Moose, but I am not sure I provide him enough guidance to get his student started with moose (zero knowledge). What will be the practical step to get started for a total novice on Moose/Pharo (I can give the initial step related to the Pharo environment, so no need to mention it) ? If such information exists, just point it to me, but I did not find after a small search. I just read it is possible (http://www.humane-assessment.com/blog/moose-custom-analyses-made-easy/) but I bet such step by step guidance, will be very useful to let novice on Pharo get started and is a way to attract more easily new users. Thanks Hilaire -- Dr. Geo http://drgeo.eu http://google.com/+DrgeoEu

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Seeking help on morphs : expander and scrolls
by Jigyasa Grover July 20, 2015

July 20, 2015

Hi I am using Expander Morphs to display some search results. I am finding it hard to insert a scroll bar in text displayed after expanding the title of the search result. The corresponding code snippet is as: *dialog newRow: {* *(* * (* * dialog newExpander: r title asString* * forAll: { dialog newText: r content asString . }* * )minWidth:600; minHeight: 10* *)cellInset: 0;* * borderStyle: (BorderStyle inset baseColor: dialog paneColor; width: 1)* * } * I basically need to add a scroll-able content in '*newText*:' portion. The entire code of my application an offline text search application namely searchQuick is available at github (https://github.com/jig08/sQuick_new) . You all are welcome to fork the code , try the infancy application and send in suggestions. Help Appreciated. Regards Jigyasa

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Fwd: Quick Silver: How to solve DeepActionStrategy as a dependency for running QuickSilver?
by Offray Vladimir Luna CÃ¡rdenas July 20, 2015

July 20, 2015

Sorry, writing again from the wrong mailing list. Here comes again. -------- Forwarded Message -------- Subject: Quick Silver: How to solve DeepActionStrategy as a dependency for running QuickSilver? Date: Sun, 19 Jul 2015 19:34:18 -0500 From: Offray Vladimir Luna CÃ¡rdenas <offray.luna(a)mutabit.com> To: pharo-users(a)lists.pharo.org Hi, I'm trying to load Quick Silver following the instructions from http://scg.unibe.ch/research/quicksilver and I get this warning message: ~~~~~ This package depends on the following classes: DeepActionStrategy You must resolve these dependencies before you will be able to load these definitions: MalGraphBuilderStrategy executeOnObject: executeOnRelationFrom:to: graph graph: initialize ~~~~~ So I searched for Deep ActionStrategy and the closer thing I got was http://www.humane-assessment.com/blog/traversal-enabled-pharo-objects/, but anyway installing DeepTraverser don't solve the warning. There is any updated procedure to install Quick Silver and load its configuration without having this issue? Thanks, Offray

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PharoJS
by Torsten Bergmann July 19, 2015

July 19, 2015

ClÃ©ment Bera wrote: >What is PharoJS ? Are you talking about Pharo on top of the Bert's SqueakJS VM ? >If so, it starts, but some primitives fail making it freeze after a short >while as you describe. >It would be fun to have it running even though most of the Pharo folks went >into the Amber direction for Pharo on Javascript. Yes there is SqueakJS from Bert https://bertfreudenberg.github.io/SqueakJS/ and I would have expected "PharoJS" to be the same for Pharo. At least I would "reserve" the name for the case Pharo images work on it as well. Unfortunately Noury Bouraqadi now took this "PharoJS" name for his Pharo -> JavaScript compiler http://car.mines-douai.fr/2015/07/develop-in-pharo-run-on-javascript/ leading a little bit to this confusion. I would have called the project "Pharo JavaScriptBridge" like the config and the repo http://smalltalkhub.com/#!/~noury/JavaScriptBridge I loaded the config from the SmalltalkHub repo and then: ConfigurationOfJavaScriptBridge loadBleedingEdge tried JbClientControllerBridge startOn:80 but were hit by several errors. In my opinion a minimal HOWTO would be required. Thanks Torsten

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GitFileTree browsing changes doesn't work in Pharo 5
by Peter UhnÃ¡k July 19, 2015

July 19, 2015

Hi, when I wanted to see package changes in Pharo 5 (with GitFileTree from MetaRepoFor5.0 / loadDevelopment) it died on MCMczReader class>>canReadFileNamed: fileName because "fileName" is actually instance of GitFileTreePackageEntry is it broken, or did I break something? Thanks, Peter

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thank you
by Tudor Girba July 18, 2015

July 18, 2015

Hi, GT captured the spotlight again at ESUG: http://www.humane-assessment.com/blog/gtspotter-1st-prize-esug2015 [image: Inline image 1] We, the Glamorous Team, would like to thank the community for the trust and for the support. We assure you that we do not take this for granted. We started on an ambitious project of rethinking the IDE from the ground up. We started with GTInspector and showed how object inspection can be a great deal more than the state-of-the-art offers. Now we redefined searching for objects. These are great milestones, but the road ahead is still long and challenging. While the Glamorous Team is at the forefront, we cannot do it alone. We need you to work with us and show the world that we can reinvent what was started decades ago in Smalltalk. Only this time weâll make it happen in Pharo. Thank you, The Glamorous Team

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Fwd: Phratch: System/World Menu instead of phratch menu
by Offray Vladimir Luna CÃ¡rdenas July 17, 2015

July 17, 2015

He he, sorry sending from the wrong mail address, here comes again. -------- Forwarded Message -------- Subject: Phratch: System/World Menu instead of phratch menu Date: Wed, 15 Jul 2015 10:35:37 -0500 From: Offray Vladimir Luna CÃ¡rdenas <offray.luna(a)mutabit.com> To: pharo-users(a)lists.pharo.org Hi, Some of my students are having a problem. For some reason the pharo world/system menu appears and we don't know how to disable it and go back to the phratch menu, so we can't use "Save as" and other options to save/export projects. How to get back the default behaviour for Phratch menus? Thanks, Offray

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Re: [Pharo-users] Pharo-users Digest, Vol 27, Issue 62
by Andy Burnett July 17, 2015

July 17, 2015

The main thing I am wondering about is how to build portable interfaces. My ideal situation would be to use something like Spec to prototype within Pharo, and then generate something similar in JS. Alternatively, perhaps we could create mock objects for something like jquery-ui. Noury, have you done any experiments with this? Cheers Andy

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The Esug videos have started arriving
by Stephan Eggermont July 17, 2015

July 17, 2015

https://www.youtube.com/user/esugboard/videos

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How to correctly boost performances with Nativeboost ?
by Matthieu Lacaton July 17, 2015

July 17, 2015

Hello everyone, I know, I come up with another question involving NativeBoost ... Sorry ! Anyway, I am currently trying to improve the performance of a Pharo application by trying to rewrite some parts in C and use them with NativeBoost. In the application, there is a need to compute a lot of 2D projections of points so basically I need to compute a lot of cosinuses and sinuses on different points. Ultimately I'd like to do it with openMP to use all the processor cores but for now I just wanted to do some tests to find the best way to combine Pharo and C. The first test consisted in writing a very simple C function and use it from inside Pharo : void project (Point *p) { p->x = cos(p->x); p->y = sin(p->y); } with typedef struct { double x; double y; } Point; In Pharo I created a NBExternalStructure to match Point and everything worked as expected. Now I ran some performance tests and there are some results I don't really understand :( 1) First test was : test | t1 t2 tC tPharo | tC := 0. tPharo := 0. 1 to: 1000000 do: [ :i | | p1 | p1 := Point x: i + (1.0 / i ) y: i - (1.0 / i). t1 := Time microsecondsToRun: [ p1 setX: p1 x cos setY: p1 y sin. ] tPharo := tPharo + t1. ] 1 to: 1000000 do: [ :i | | p2 | p2 := MyPoint x: i + (1.0 / i ) y: i - (1.0 / i). t2 := Time microsecondsToRun: [ self primProject: p2. ] tC := tC + t2. ] Results here are arround 185 ms for tC and 210 ms for tPharo. Nothing really bothered me with this test as results seemed coherent (are they ?). 2) Second test was : test2 | tC tPharo array1 array2 size | size := 1000000. array1 := Array new: size. array2 := Array new: size. 1 to: size do: [ :i | array1 at: i put: (Point x: i + (1.0 / i ) y: i - (1.0 / i)). array2 at: i put: (MyPoint x: i + (1.0 / i ) y: i - (1.0 / i)). ]. tPharo := Time millisecondsToRun: [ array1 do: [ :each | each setX: each x cos setY: each y sin. ]. ]. tC := Time millisecondsToRun: [ array2 do: [ :each | self primProject: each. ]. ]. Results here are arround 3 500 ms for tPharo and 150ms for tC. And I don't really understand why such a difference. I've tried doing tC first but it changed nothing. I've checked the results and the contents of array2 are all updated correctly. Is there a problem with tC or tPharo ? What am I doing wrong ? On another hand, I also noticed that it is faster to allocate the array with Pharo Points than the array with MyPoint C-ish struct. I did some more testing and it seemed that on a general basis it is faster to manipulate Pharo objects than C-ish structs or pointers. For example, it is faster to read in a Pharo array than to read in a NativeBoost_to_C array. Knowing so, what kind of C types should I use to avoid losing too much time manipulating them with NativeBoost ? Is it preferable, for example, to use two separate double instead of a struct with two doubles inside ? Thank you very much, Matthieu

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NativeBoost and OpenMP
by Matthieu Lacaton July 17, 2015

July 17, 2015

Hello, I haven't really seen anything related to this on the Internet and maybe some people will find it cool so I just wanted to report one thing I found out today : NativeBoost works great with OpenMP ! I wrote a C function twice, once with openMP and once without. I made 32 bits libraries and used them from inside Pharo with NativeBoost. When using the non - openMP library, only one core was used but when using the openMP library, both my cores were used and the time it took to run was really divided by (a little bit less than) 2 ! That's just me but i find it really cool :p Cheers, Matthieu

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