Beginners March 2021

beginners@lists.squeakfoundation.org

6 participants
4 discussions

wiki page for 'how to change default font'
by stes＠PANDORA.BE 07 Jul '22

07 Jul '22

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 How to change the system font to a custom TrueType font ? I managed to solve with the help of the following: http://wiki.squeak.org/squeak/5586 http://wiki.squeak.org/squeak/5584 http://wiki.squeak.org/squeak/5773 - system with russian (cyrillic) fonts The above documents helped a lot; specifically the document 5773 "how to setup Squeak with a cyrillic font", had an important note: "Switch your fonts This can be done from World->Appearance->System Fonts." That works indeed, if you set the various fonts (text font, menu font, list font, code font etc.) in the World->Appearances->System Fonts. I think this could be in its own wiki page: "How to change the default System Fonts" if such a doc does not already exist. I didn't find it on wiki.squeak.org but fortunately the other docs helped. David Stes -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJf/aLAAAoJEAwpOKXMq1MaU48H/RnL+YHqpU+EzKlJJgPCW+Ee 9wI/TWJ6ygSBScmH2iJ/ClF+6XoT2aG7YxI853jCf6QYh48vWhNzr9IXaFtywzOo aqhlcwmvbeLYcfQRqzC7dxsGf+F+pPVp6YJzGX/OBCJ85Ae7IqBQXy7ScW7LEG7B gquKCvbuChib7GK5Pw1V9Tvt9n9n7zeYcTqSSlpp2yAYkKqUsuQV00w/y+LYt9YY PSLyU1c9GZaDUyPcsQjJvWLmpGFQZ6cUhediFL8q7pOEXTCTDmsh6VguZJtZvRwT QmZYRkxKqT7Gvn2tTi0kkIRTXzyE18pfwCue139BvPsoDdiqWMvZCyMWCoWe084= =m7OG -----END PGP SIGNATURE-----

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Help with FFI
by Christian Kellermann 04 Feb '22

04 Feb '22

Dear list! I want to find my way around the FFI module and how to use it in squeak. No let's step back. I want to use a a binding to libsodium form Tony (https://www.eighty-twenty.org/2013/06/11/nacl-for-squeak-and-pharo) and ended up using the Crypto-Nacl-HernanMoralesDurand.13.mcz package as the most recent one from Tony seemed to be Pharo's FFI syntax, as Tobias suggested to me. However each of the supplied tests return a 'module not found error' on my 64 bit Linux Squeak 5.3+updates with the bundled VM. So I tried the Unix examples there and none of those work either, so before I dig deeper into this I'd like to get some kind of re-assurance of what I should expect to work on this particular setup. The FFI Tests from the bundled package all pass though. So my questions are: 1. Are the Unix FFI examples supposed to work? 2. Is the Crypto-Nacl package I want to use recent enough for the FFI? 3. Is the documentation in swiki still up to date for squeak 5.3? 4. What's the logic for searching and loading the shared object to bind to and where do I have to look in the opensmalltalk-vm code? Thanks for all your help! Christian -- May you be peaceful, may you live in safety, may you be free from suffering, and may you live with ease. Also encrypt mails to me: gpg key 0x068757350D0328634B833B65C537678F6BC627B5

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AbstractObjectsAsMethod
by stes＠PANDORA.BE 16 Mar '21

16 Mar '21

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 It seems the runtime (VM) defines a special selector #define SelectorRunWithIn 49 for a message with:run:in: I don't know the details of the purpose of this selector, but I think the VM supports it so that subclasses of AbstractObjectsAsMethod, not just subclasses of CompiledMethod, can be used as methods. As a test (this could be documented somewhere, for example on wiki.squeak.org) consider 2 classes 'Foo' and 'Bar' : AbstractObjectsAsMethod subclass: #Foo instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'ObjectAsMethodTrivial'! !Foo methodsFor: 'RuntimeSupport'! run:aSelector with:arguments in:aReceiver "" Transcript show:'in Foo run:with:in:'. Transcript cr. ^ self! ! Object subclass: #Bar instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'ObjectAsMethodTrivial'! !Bar class methodsFor: 'class initialization'! addFooBar "" self addSelector:#foobar withMethod:(Foo new). ^ self! ! Now after fileIn of the above Foo and Bar classes, if I open a Transcript and run in a Workspace : |p| p _ Bar new. Bar addFooBar. p foobar. will print in an open Transcript in Foo run:with:in: Again, I think this could/or should be documented on wiki.squeak.org, but what happens is, I think, that if I dynamically add a message (method) implementation to class Bar, using addFooBar, which is installing a method #foobar using addSelector:withMethod:, then the VM dispatched a run:with:in message to the 'method' object, which need not be a actually, a subclass of CompiledMethod. Also some other selectors flushCache, selector: and methodClass: seem necessary for this feature to work. By subclassing AbstractObjectsAsMethod, on the other hand, it is not required to implement flushCache, selector: and methodClass: as AbstractObjectsAsMethod is doing that, so perhaps the intented usage is to subclass AbstractObjectsAsMethod That is why in the above example I do: AbstractObjectsAsMethod subclass: #Foo If this is a standard Squeak feature, it could be on the wiki.squeak.org; I was not able to find info on it. David Stes -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJgSfvAAAoJEAwpOKXMq1MaaGkIAKlXT+qfJcTVjMXRZwABdhFP nTYk+yxSVCarXcoNZSDM6P6dC3xurEECF2Ypkr4zN7QvogFU/4hpe90AXWNPP26E kmX5fJy59bxld1OlNYOX3DjTx69cL8/0QKcBHdRS6Ka012WY0Af415r9bLca6kOc b19FsWDZe9FcXJUaHqiQRBvyhQBt3NcVwYUIXlRwHEiTPfLIXqkjPlOOTlTtezRE B9m3u0GI0ycUcj4hMb7HpSZQOlb6ADfyz4pYXr+0js3EKxiFC6VSThPB0cJpcOTl o7dGjS2kFwX333JJfpyztETqWjmUR6s9PLGGZe9Ki2H7LsKKi4Gy35yWs33n0tI= =tvmw -----END PGP SIGNATURE-----

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Issues with installing OMeta2 + infinite 2D world
by Michał Olszewski 06 Mar '21

06 Mar '21

Hello, I'm new to the list. My first question is, how do I load correctly OMeta2 into Squeak 5.3? I'm loading it using monticello browser and several errors pop up: 1. first one is syntax error that I ignore. I assume it's related to that Ometa extends smalltalk syntax with its own one. 2. second one is: *MessageNotUnderstood:UndefinedObject>>isOMeta2Rule:* .I choose to just implement one, in Object class, that returns always true value. 3. The third one is *MessageNotUnderstood: OMeta2Compiler>>parseCue:noPattern:ifFail:* . I tried to debug it and it seems it's sent to parser, but parser understands such message or am I reading it wrong? Attempting to implement it in Compiler class instance side, results in infinite loop (image freeze). Is there some way to load it, or something is broken in newer versions of Squeak? By the way my OS is Windows 8.1, image is freshly downloaded from website + installed Babelsberg package. My second question is, how can I implement infinite 2D world/pane where I can scroll/use mouse "click and drag" to navigate? What morphs classes (or approaches) should I use to implement such functionality? I want to implement train simulation (transporting goods etc.). Michał

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Beginners March 2021