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

<example> pragmas and example* methods use-cases
by Peter UhnÃ¡k July 9, 2015

July 9, 2015

Hi, there was a long discussion about the meaning of example* methods and <example> pragmas, however I do not know what was the final resolution. Basically I am interested in two use-cases 1. executable example (the one where Nautilus shows nice play icon) This is as I understand only through example* naming (on class-side). 2. returning examples (example that returns some value that I can reuse) Is this what <example> pragma is for? How would I go about naming it considering that having play icon there would be counter-productive (user would be clicking on it and nothing would happen). Thanks, Peter

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brick/bloc examples missing FILOStack
by Peter UhnÃ¡k July 8, 2015

July 8, 2015

Hi, I wanted to try new brick/bloc thing https://pharoweekly.wordpress.com/2015/05/30/future-new-widget-sets-is-comi… however after loading (in Pharo 5.0) it is complaining about missing FILOStack (in BlBrickLayouter>>initialize) What should I load? Thanks, Peter

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Athens and radial gradient
by Matthieu Lacaton July 5, 2015

July 5, 2015

Hello, I wanted to use Athens API to define a radial gradient and I saw that the class RadialGradientPaint only had one radius as instance variable and it seemed to me it was passed as the end radius while the start radius was set to 0. Does it mean that if I want to define a start radius different from 0 I need to call the backend directly ? Thanks, Matthieu

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an elegant way to return a result
by abdelghani ALIDRA July 4, 2015

July 4, 2015

Hi guys, what is the best way to express the following :return (something aMsg) if it is not nil, return somethingElse elsewhere I could stil write: something aMsg Â Â Â Â ifNil:[^ something aMsg]Â Â Â Â ifNotNil:[^aNotherResult] but it sounds a little bit weird Regards. Abdelghani

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[Ann] DragPanels: Floating palette windows with drag-and-drop in Morphic
by Stephan Eggermont July 3, 2015

July 3, 2015

Morphic offers everything needed to create highly interactive applications in Pharo. It is however, difficult to find out how to actually create those applications. Morphic tutorials provide a starting point, and are not very good at showing how the different features interact and are supposed to be used together. Morph has lots of methods, and some of them are not in the method category where you might expect them. The result is that most Morphs in Pharo do not use much of what Morphic has to offer. Wouldn't it be great if there would be some sample code, showing how Morphic can be used to great effect? Well, here is some code that takes a first step towards that goal. DragPanels shows how to create a floating palette, filled with wells that support dragging a property towards a target. It shows how to combine drag-and drop with click: and context menu actions, and show to give UI feedback when over a well and when holding the mouse down over an element that reacts to click:. You can see the code in action here: https://vimeo.com/131889858 The color panel shows some colors. If you don't set the allowDropBlock, it will work with any morph that responds to #color: (like the world). By clicking on the plus, you can add more colors to the panel. The panel has a context menu to restore the default values. ColorPanel withSevenPaleColors allowDropBlock: [ :source :target | target class = CardMorph ]; openInHand The people panel shows avatars belonging to an email addres. By default it uses gravatar for them, and caches the images. PeoplePanel new defaultValues: #('stephan(a)stack.nl' 'serge.stinckwich(a)gmail.com' 'nicolas.anquetil(a)inria.fr' 'thierry.goubier(a)gmail.com' 'stephane.ducasse(a)inria.fr' 'marcus.denker(a)inria.fr'); allowDropBlock: [ :source :target | target class = CardMorph ]; openInHand When dropping, the dragSource sends #color: resp. #email: to the target by default. By setting the dropSelector of the DragWell this can be overridden. You can try the code by do-ing Gofer new smalltalkhubUser: 'StephanEggermont' project: 'Dragpanels' package: 'DragPanels'; load. It is used in (a work in progress) Gofer new smalltalkhubUser: 'StephanEggermont' project: 'Documentation' package: 'CardsMorphic'; load. Stephan p.s. On the wishlist are - add more color palettes - add a dark theme, refactoring the colors - add a small close cross in the title bar of the palette - define the dropSelector in the panel, not the well - support different sized wells, refactoring the sizes - make the mouseOver rectangle color content dependent - add pharo contributors as an avatar source - add a configuration

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Slow compilation on one of my Windows PCs
by Jan BlizniÄenko July 3, 2015

July 3, 2015

Hello I have a long-term problem with loading of packages. Compilation takes very long time on my Windows PCs. On desktop it takes "only" double amount of time in comparison with linux, but on notebook, it is more than 10 times slower. Desktop has Windows 7 Ultimate 64-bit and notebook PC with Windows 7 Home Premium 64-bit, both have somehow similar specs (4-6 years old dual-core processors on 2,9 and 2,4 GHz), similar software, both have magnetic HDDs. I believe it used to take very long time on my notebook too, but I tried opening Pharo there again and it was somehow OK, but I'm not aware of any major change which could have caused it ... I mean... a lot changes on my PCs, but I can't remember anything which could directly affect it. Following "benchmarks" are both on same (copy paste) of VM - Windows VM 453 from 2015-06-18. Both on clean image 50141. All tested in as much as similar conditions as possible with everything else (possible) turned off. However, it used to be slow like that for a long time on multiple previous VMs and images since I can even remember (which is about a year). [ Gofer new configurationOf: 'Roassal2'; url: 'http://smalltalkhub.com/mc/ObjectProfile/Roassal2/main/'; loadDevelopment. ] timeToRun inspect. Desktop: 386 s. Notebook: 48 s. Linux in VM on notebook: 27 s. |results| results := OrderedCollection new. 20 timesRepeat: [results add: (Float readFrom: [ Object compile: 'a'. ] bench)]. ('compilations per second - avg: ', results average asString, ', min: ', results min asString, ', max: ', results max asString) inspect. Notebook: compilations per second - avg: 217.7153, min: 5.0, max: 247.258 Desktop: compilations per second - avg: 23.1337, min: 19.448, max: 28.155 Linux in VM on notebook: compilations per second - avg: 529.0066600000001, min: 5.0, max: 573.97 I tried turning off antivirus, turning off file indexing, praying to multiple gods, but with no success. I will appreciate any help. Jan -- View this message in context: http://forum.world.st/Slow-compilation-on-one-of-my-Windows-PCs-tp4834668.h… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Mofify websockets status to deliver SVG?
by Stephan Eggermont July 2, 2015

July 2, 2015

Now the cardwall can export SVG, I thought it would be nice to modify & reuse the websockets status code to serve the SVG. How do I debug that? Stephan

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DNS level changes for smalltalkhub.com Friday
by Marcus Denker July 2, 2015

July 2, 2015

Hello, Friday morning we will do some DNS level changes for smalltalkhub.com. This should normally have no impact on the server, as the new DNS server will point to the same IP as the old. Marcus

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does anybody use the AST navigation?
by stepharo July 2, 2015

July 2, 2015

Hi guys does any of you use the AST code navigation? Because we could remove it. Stef

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HTTP file logging for Zinc
by Esteban A. Maringolo July 2, 2015

July 2, 2015

Hello everyone, I want to record everything that goes in or out from our REST API servers, maybe including HTTP payload (JSON mostly). ZnLogEvent seems to have the basic building blocks for logging, but I want to know if there is a package/project that already provides file logging, so I can not only have the logs, but also if the file format is compatible with other http logs I can run traditional web log tools on them, like Webalizer or AWStats. Thank you! Esteban A. Maringolo

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