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

Customize serialization with Fuel
by Alejandro Infante May 7, 2015

May 7, 2015

Hello all, Currently Iâm in the need of serializing some Spy instances and my problem is that some of the objects hold references to Classes and CompiledMethods. This gives me headaches because I would like to materialize Spy in another image which possibly does not define those classes and methods. Is there a smart way to specify which instances variables serialize and which of them not? Even better would be to specify that instead of serializing an instance variable #a that I know that holds a CompiledMethod, serialize the ring representation of the CompiledMethod. Thanks, Alejandro

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Problems in switching from Moose 5.0 (Pharo 3) to Moose 5.1 (Pharo 4)
by PBKResearch May 6, 2015

May 6, 2015

I have been working with Moose 5.0 on a project involving natural language processing. I used TextLint to parse the input, just because it contained a set of parsers which gave output in a convenient form. I have read all about the virtues of Pharo 4, and decided to give it a try, so I set out to reproduce the earlier results. I have run into a number of problems - basically I haven't been able to get anywhere. I realise TextLint is rather antique, but basically as I use it it is just a set of PetitParser parsers, so I can't see a problem. I have boiled the problems down to a few test cases, not realistic bits of my work but just to show the essential points. 1. Environment: Windows 7 Professional (64 bit version). 2. Download and install latest Pharo 4 - Latest update: #40612. This is just to get an up to date VM. 3. Download latest Moose 5.1 image and unzip into same folder as Pharo 4. On opening the Moose 5.1 image it also shows Latest update: #40612. (I have to ignore Firefox's hysterical warnings that the INRIA site does not have a valid security certificate.) 4. Load TextLint into the image. Can't get 'ConfigurationofTextLint' to work, so load TextLInt-Model-JorgeRessia.225.mcz and TextLint-Tests-lr.166.mcz via the Monticello Browser. This is the same as I used in my earlier Moose 5.0 image, where it worked as expected. 5. Open a playground, enter: PPToken on: 'test'. and select 'Inspect it'. The inspector halts with message: 'MNU ByteString>>find AnySubstring:startingAt:' Basic Inspect works as expected. Does this look like the problem raised by Nicolas Lusa today? 6. Enter in the playground: word := (TLTextTokenizer parse: 'test' startingAt: #word) at: 1. (The tokenizer gives an array of tokens, so we need to select the first - and only - one.) Basic Inspect confirms that 'word' is a PPToken, as expected. 7. Enter in the playground: TLWord with: word. Select 'Do it'. The image becomes completely unresponsive, and appears to be in a tight loop. Only way out is to click the Windows red X and say yes to exit without saving. Restarting, get to the same point and select 'Debug it'. Trace it to TLSyntacticElement>>initializeWith: aToken, where the only line of code is: 'token := aToken'. Again a complete lockup. Sorry for the lengthy details; I just hope there is enough there to enable someone to diagnose the problem(s). Any help gratefully received. Meanwhile I am back to the Pharo 3 version. Thanks Peter Kenny

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SDL plugin ?
by Matthieu Lacaton May 6, 2015

May 6, 2015

Hello, I am currently playing with OSWindow and I am wondering what the "SDL plugin" is in the OSSDL2Driver ? When I downloaded the latest linux VM + image I got a library called libSDL2DisplayPlugin but how can I get this plugin for windows ? Is it possible to get the source code too ? Thanks, Matthieu

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Some Athens modifications ?
by Matthieu Lacaton May 6, 2015

May 6, 2015

Hello everybody, I was playing arround with Athens lately and I think I encountered a few small bugs along the way (I may be wrong though) : 1) In *LinearGradientPaint class >> from:* aStartPoint *to:* aStopPoint There is a call to the method *"initializeFrom: aStartPoint to: aStopPoint"* but this method does not exist. I think the whole method could probably be replaced by : *LinearGradientPaint class >>* *from:* aStartPoint *to:* aStopPoint ^ self new start: aStartPoint; stop: aStopPoint; yourself. 2) This is not much but in the *GradientPaint* class there is an instance variable named *"stops"* but it seems that it is never used. 3) In AthensCairoMatrix there is a difference in the variable order between *AthensCairoMatrix class >> fieldsDesc* and *AthensCairoMatrix >> initx: y: sx: sy: shx: shy:* In the first one the order is "sx, shx, shy, sy, x, y" whereas in the second one it is "sx, shy, shx, sy, x, y". However, according to the cairoGraphics API documentation, the order should be the same. By the way I have a small question : Why not keep the same variable names than in cairoGraphics here (xx, yx, xy, yy, x0, y0) ? 4) In *AthensCairoMatrix >> primMultiplyBy:* m. The function as defined in C is the following : void cairo_matrix_multiply (*cairo_matrix_t <http://cairographics.org/manual/cairo-cairo-matrix-t.html#cairo-matrix-t> *result*, *const cairo_matrix_t <http://cairographics.org/manual/cairo-cairo-matrix-t.html#cairo-matrix-t> *a*, *const cairo_matrix_t <http://cairographics.org/manual/cairo-cairo-matrix-t.html#cairo-matrix-t> *b*); It is stated that *"The effect of the resulting transformation is to first apply the transformation in a to the coordinates and then apply the transformation in b to the coordinates."* In Pharo it is defined like this : *void cairo_matrix_multiply ( AthensCairoMatrix * self, AthensCairoMatrix * m , AthensCairoMatrix * self )* For me, when writing "self multiplyBy: aRotationTransformation" it seems more logical to first do the self transformation" and then the rotation transformation (especially if we want a cascade of transformations). However, as currently written in Pharo it is actually the rotation transformation that is applied and then the self transformation. For example, if I want a scaling then a rotation then a translation it seems easier to me to do : myTransformation := myTransformation multiplyBy: scalingTransformation. myTransformation := myTransformation multiplyBy: rotationTransformation. myTransformation := myTransformation multiplyBy: translationTransformation. etc. if I want some other transformations. So it could be nice to have a *a method defined like this : void cairo_matrix_multiply ( AthensCairoMatrix * self, AthensCairoMatrix * self , AthensCairoMatrix * m )* What do you think about it ? Thanks, Matthieu

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WebSocket and Proxying ...
by itlists＠schrievkrom.de May 6, 2015

May 6, 2015

Hello, I'm playing with WebSockets under Pharo4 and this works as expected - when using Pharo4 alone (using the Zinc packages). But I did not get it to work, when e.g. doing a proxying via nginx (I did not check it with Apache). Actually Pharo4 seems to receive some stuff, because the WebSocket of Pharo4 stuff does not work as expected after first proxying attempts. Has anyone experience with that ? Marten

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[ANN] Idea icon pack now in Configuration Browser
by Esteban Lorenzano May 6, 2015

May 6, 2015

Hi, I made a configuration to install the new Idea Icon Pack from configurations browser for Pharo 4. You can install it and then choose your new icon set in settings. You can also manual install them by: Gofer it smalltalkhubUser: 'Pharo' project: 'MetaRepoForPharo40'; configurationOf: 'IdeaIcons'; loadStable. ThemeIcons current: #IdeaUIThemeIcons asClass new. âIn Pharo 4, you might need to execute thisâ AbstractNautilusUI resetIconCaches. This icon pack works also for Pharo 3 If you lost it, here a couple of screenshots:

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A Pharo..
by Hilaire May 6, 2015

May 6, 2015

With Dr. Geo -- Dr. Geo http://drgeo.eu http://google.com/+DrgeoEu

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Editing Pillar
by Norbert Hartl May 6, 2015

May 6, 2015

I know there are few threads about Pillar these days. I'm sorry if I'm repeating another present question. What would be the best way to edit a pillar file in the image. Is there some nice rubric editor or the like where I can edit pillar syntax with highlighting? And has this something like the preview the class comment in pillar stuff offers? thanks, Norbert

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asOrderedSet
by phil＠highoctane.be May 5, 2015

May 5, 2015

Looks like we haven't that one. So, how does one get an ordered collection without duplicates from an orderered collection ? Phil

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Help required for understanding a project on smalltalk hub
by Jigyasa Grover May 5, 2015

May 5, 2015

Hello All ! I have just started with Pharo and still grasping it features. I have come across a project on Smalltalk Hub http://smalltalkhub.com/#!/~BenjA/FullTextSearch ; a search application for Pharo. I wish to explore this project and enhance/improvise it further. It would be great if the author of this project, any of its contributors or simply a Pharo enthusiast would guide me on how to go about understanding the project. I am keen on broadening it further. Thanks Jigyasa

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