April 2012 - Pharo-dev - lists.pharo.org

[Pharo-project] Morpheas , bringing Morphic to Opengl (3d GUIs)
by dimitris chloupis May 22, 2012

May 22, 2012

I have started my first project with Pharo (and hopefully Squeak too) called "Ephestos" .Â http://www.squeaksource.com/ephestos.html Ephestos is divided into 3 areas/ elements / concepts : a) Morpheas b) Proteas c) Orpheas Morpheas is an effort to bring Morphic to OpenGL and to implement 3d guis , that can be designed in blender ( probably will implement a addon exporter too from blender to Pharo) and deployed in Pharo , minimising coding and maximising ease of use, since a 3d gui can be fairly complex to program.Â The reason why I am posting here is for your help. I am very new to Pharo and smalltalk and Ephestos is an extremely ambitious project which I hope to be commited for at least the next 5-6 years which I plan to release version 1.Â My first rule is of course , because the project is already very ambitious, "code reuse". I want to be informed what efforts there have been towards that direction .Â Mr Stef published recently a great PDF document Â titled "Pharo's Vision : Goals , Processes and Development effort" in it there is the following quote about Morphic "What have been done so far. Igor Stasenko did the following: â¢ Designed and implemented a new canvas API and all the necessary abstractions to generate adequate code for different backends. â¢ Deep integration to be able to inject frames into existing VMstructure (Igor can you confirmthis?) â¢ Designed and implemented a new textMorph, paragraph and other classes. â¢ Defined a default back-end. â¢ Defined a Cairo back-end. â¢ Defined an openGL back-end (using an OpenGL calling framework).Â " So I guess my question should be directed towards Igor, but maybe someone else also works in this. I am interested in any information about Morphic and OpenGL . I am also interested even on partial support of graphics engine like Irrlicht , Ogre and Open Cobalt. My main focuse is Nativeboost cause it appear to have a new enhance FFI, and of course the possibility of inline Assembly code. Â Has anyone , advice , suggestions , ideas and hopefully some documentation I can use Â ?Â I am already studying both OpenGL and Nativeboost / NBOpenGL .Â

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[Pharo-project] About the new release process
by Esteban Lorenzano May 15, 2012

May 15, 2012

Hi folks, Now that Pharo 1.4 is out, I want to talk a bit about our new release process. As you know (if you read the Pharo vision document [1]), we are switching our release process into a more predictable one: time based, not feature based. We are adopting an "Ubuntu like" model, with one mayor release per year, and two bug fix releases at month 4 and month 8. So, the next releases will have this numbering: 2.0 big release (we hope to have it in january or february), 2.4 in april and 2.8 in august (all 2013, if Mayans were wrong and we are still alive). During this year we'll also release bugfix versions of Pharo 1.4. Each major version we want to improve the system in a lot of different ways. These are examples of what we want to achieve during 2.0 development: -Improve our release process. This is not just by being more predictable, but also about improving the current process technically. For instance, we are going to switch our release building to metacello configurations, starting with a minimal image. That means: you can take a minimal image and modify a metacello pharoconfig to build the image that you want (on your own responsibility). â We are going to adopt Opal as new compiler (this will allow us to improve a lot in that area, also to fix important bugs now living in the debugger). â Replace old SystemChangeNotification with a new announcement based system. â use Fuel as standard serialization tool (remove SmartRefStream). â remove old File System (use new based on Filesystem). â remove old HTTP (use Zinc instead). â remove old categorizer (Use RPackage instead). â remove old browser (Use nautilus instead). â remove old basic tools (use Spec to replace them). â clean up URL/URI mess (replace with some coherent unique API). In summary, it is: a) replacing old subsystems for something better. b) add new features, which is long-awaited by people. Most of your projects will not notice the changes, but some might do. In that cases, we will not break backward compatibility just because we want, but there are reasons of improvement. Also, we will follow the deprecation policy we have followed so far (whenever is possible). We want to invent the future, one step at a time. Thanks, Esteban [1] http://www.pharo-project.org/download/pictures/be/j32hajf3kjdbsebqo0a9zc5tk…

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[Pharo-project] SimpleLiteralArrayParser
by stephane ducasse May 10, 2012

May 10, 2012

Hi guys We should develop a simple Literal Array parser that is dialect independant so that we can avoid using JSON for meta data. So I will start to develop. I will start to write some tests and do it test first. Gofer new repository: 'http://ss3.gemstone.com/ss/SimpleLiteralArrayParser'; package: 'SimpleLiteralArrayParser'; load Now I still wonder what do we do about floats. May be the situation changed but Squeak and VW floats were not the same. Stef

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[Pharo-project] Questionn
by Santiago Bragagnolo May 5, 2012

May 5, 2012

Hi all! I was chating with Guille, who's blaming me for make a refactor in sunit for pharo 1.4 instead of 2.0 and told me 'pharo 2.0 probably adds class layouts and slots'. Well, i'm with a concrete type inference project, i want to know what is made and who is in that part of the project to annoy and bore him with questions, 'cause probably i'll want to type the slots, but i need to understand the metaphor of the slots implementation. I want to understand too whats implication has the class layout over the types. Santiago.

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[Pharo-project] Standard input in Pharo?
by Andrei Stebakov May 5, 2012

May 5, 2012

I've been just going through "Computer Programming with GNU Smalltalk" book using Pharo 1.0 as an actual ST implementation. The book mentions "stdin nextLine" as a way to get an input from a user via the standard input. Is there a similar class/method in Pharo?

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Re: [Pharo-project] OSProcess - is process done?
by DeNigris Sean May 5, 2012

May 5, 2012

Begin forwarded message: > From: "David T. Lewis" <lewis(a)mail.msen.com> > Subject: Re: OSProcess - is process done? > Date: April 26, 2012 8:03:50 PM EDT > > Sean, > > Excellent, thanks for the feedback. As for #upToEnd, that's a tricky > question when you are reading from a pipe (or a socket). It is not > generally possible to ask the pipe whether more data is going to be > available on it. About the best you can do is ask it whether an end > of file condition was detected on the last read operation (there are > fancy ways to set up notification that a pipe was closed, but nothing > that I would want to try to implement in the OSPP plugin). > > Based on that, I ended up doing #upToEndOfFile to mean "read all > available data, and keep trying until end of file is detected, then > answer the result" and #upToEnd to mean "read all currently available > data". In the case of a blocking stream (i.e. the end of the pipe > from which you are reading data), you want the underlying reads to > block (because that is the whole point of a blocking read), and > you want the reads to give you available data if the stream is set > to non-blocking. But there is no practical way to ask a blocking > pipe to give you all available data, because you cannot ask it how > much data it has available in advance of doing the read. > > The combination of a pipe set to non-blocking mode, along with an > #upToEnd that reads whatever data is currently available, gives you > the behavior that you probably expect. But that implies that you > will poll for data (loop and keep reading until you get all the data) > or arrange for event notification to let you know when data is > available (this the AioPlugin, which notifies the image whenever > data becomes available for reading on a pipe). > > There is a mechanism in OSProcess/CommandShell for converting a blocking > pipe into an event-driven buffered reader that handles these issues. > It is not well documented, but try this to see how it works: > > p := PipeableOSProcess command: 'ls -l /usr/bin'. > p pipeFromOutput setBufferedReader. > p upToEndOfFile > > This approach is used in CommandShell to provide the expected behavior > when the image is reading from a pipe connected to some external > process. And when pipes are connected end-to-end in a unix style > pipeline, they can be left in the normal blocking mode so that external > programs will block on reads from their stdin, which is the expected > behavior for normal programs in a unix command pipeline. > > Dave >

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[Pharo-project] Adding hooks for well known events in morphic
by Guillermo Polito May 3, 2012

May 3, 2012

I've made up a list with all the useful morphic widget I've found in a alpha alpha alpha 2.0 image. I'd like to put in those widgets empty hooks like: Morph>>triggerOnShow "hook" for common events widgets provide usually in MVC frameworks. That means *not changing the whole interface nor refactoring everything*. *Just adding the hooks*. What we were talking with Mariano (I hate you for putting ideas in my head) today in the train was to add those empty hooks and put senders for them, what should be easy. This way we can start to homogenize morphic a bit. Most likely, in a not so far future, those empty hooks could be replaced by something like: Morph>>triggerOnShow self announcer announce: (MorphShowAnnouncement show: self) Now, here is a list of the most important widgets i've found (I could've missed some) and events they should trigger. I'm not taking into account new multitouch interfaces and stuff. For all widgets onShow onDelete onKeyUp onKeyPress onKeyDown onClick onMouseDown onMouseUp onDoubleClick onDragged onDropped onMove? onResize? For all containers onChildAdded onChildRemoved "Widgets" Check/Radio -> CheckboxButtonMorph/SimpleSwitchMorph onSelectionChanged List/Grids -> PluggableListMorph/PluggableMultiColumnListMorph/LazyListMorph/MulticolumnLazyListMorph onSelectionChanged Button -> PluggableButtonMorph/SimpleButtonMorph/MultistateButtonMorph onClick Label -> LabelMorph/FuzzyLabelMorph /MultistateLabelMorph Progress Bar-> SystemProgressBarMorph Slider -> Slider/PluggableSliderMorph onSelectionChanged Text handling -> TextMorph/PluggableTextMorph onSelectionChanged Field Handling -> PluggableTextFieldMorph/PluggableTextEditorMorph Tree -> MorphTreeMorph onSelectionChanged onExpandItem onCollapseItem Combo box -> DropListMorph/EditableDropListMorph /SearchMorph/MorphDropListMorph onSelectionChanged Menues -> MenuMorph + friends onClick (for menu item probably) Image -> ImageMorph/ImagePreviewMorph Diff -> DiffMorph Color Presenter -> ColorPresenterMorph Color chooser -> ColorChooserMorph/HSVColorSelectorMorph / SVColorSelectorMorph onSelectionChanged Task var -> TaskbarMorph "Containers" ScrollPane Windows -> SystemWindow/PluggableSystemWindow /StandardWindow Dialog window -> DialogWindow & (lots of) subclasses Panel -> PanelMorph & subclasses / PluggablePanelMorph Tabs -> TabGroupMorph (Other Tab stuff -> PluggableTabBarMorph + PluggableTabButtonMorph ) onSelectionChanged Guille

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[Pharo-project] What about making the configuration browser more visible?
by Guillermo Polito May 3, 2012

May 3, 2012

What about naming it "Package Loader" or "Package center" or something like that? And putting it in the main menu instead of inside of Tools? I want people who open pharo for the first time to say "Hey, here I can download stuff!!!" Guille

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May 2, 2012

I'm taking some times to go back the block closure chapter and I was wondering how I can get access to block temporaries [ |a | a :=2. a] for example I tried [ |a | a :=2. a] outerContext contextForLocalVariables tempAt: 1 and variations but none worked. Stef

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[Pharo-project] Pretty printing on Nautilus
by Davide Varvello May 2, 2012

May 2, 2012

Hi, Today I have a lot of "cosmetic" questions :-) How can I enable pretty printing on Nautilus? Moreover, the old cmd-r does not work anymore, right? Thanks Davide -- View this message in context: http://forum.world.st/Pretty-printing-on-Nautilus-tp4596333p4596333.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

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