Squeak-dev April 2013

squeak-dev@lists.squeakfoundation.org

66 participants
225 discussions

WeakSet but no WeakIdentitySet?
by Igor Stasenko 25 Aug '23

25 Aug '23

Hello, i need to keep a bunch of CompiledMethods in WeakSet, but i am a bit afraid, that it wont work as i want to, because of CompiledMethod>>= implementation, because a code, which i currently writing doesn't changing a method's bytecode, but changing its trailer instead, and so, this could lead to undesirable effects.. If i could have a WeakIdentitySet... Meanwhile, i think i have nothing else, but just use a degenerate WeakIdentityKeyDictionary , with methods in keys and nils in values. :( -- Best regards, Igor Stasenko AKA sig.

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veryDeepCopy, ImageSegments, and actionMaps
by Ned Konz 17 Aug '23

17 Aug '23

Any Object can have dependents whether or not it has an instance variable to keep track of them (these are kept in the DependentsFields class variable of Object). The only class that keeps its own dependents is Model. Any Object can have an actionMap. These are supplied by EventManager class by default, and are stored in the ActionMaps class variable of EventManager. The only class that keeps its own action maps is Morph. When we veryDeepCopy an object we also copy the global dependents (see DeepCopier>>fixDependents). However, we don't copy the actionMap in those cases where it's held by the EventManager class. When we file out an object that uses DependentsFields out into an ImageSegment, we also file out the dependents (see ImageSegment>>dependentsSave:) if it's in a project. We do this by adding a project parameter called #GlobalDependentsInProject. However, we don't file out the actionMap in those cases where it's held by the EventManager class. My question is this: should we fix these behaviors (copying and serialization) to include these "global action maps" just like we already include the "global dependents"? Or should we discourage the use of the "global action maps"? -- Ned Konz http://bike-nomad.com GPG key ID: BEEA7EFE

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Announcement: Spelling services
by Tim Felgentreff 23 Aug '21

23 Aug '21

Hi Once upon a time, John M. McIntosh built a spellchecker plugin for the MacVM and there was a fileout that added a spelling service class to use it from Squeak. We have added code to provide the same API (for now) to windows and linux users that have ispell (or a compatible program, like aspell) installed on their systems using system callouts. A metacello configuration is available from the MetacelloRepository on Squeaksource, ConfigurationOfSpellingServices. The development repository is at http://www.hpi.uni-potsdam.de/hirschfeld/squeaksource/SpellingServices.html, the repo has global read+write, so if anybody finds this useful and has changes, feel free to commit to that repository. -Tim

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find original change set
by Javier Orsaria 09 Mar '21

09 Mar '21

Hi, I was trying to use, in VersionsBrowser, the feature "find original change set" for a method. In old versions (3.8 and earlier) this work fine. But in 3.10 and 3.9 don´t. I followed the sequence and detect the problem at MethodChangeRecord-noteNewMethod: noteNewMethod: newMethod "NEVER do this. It is evil." currentMethod _ nil. should be: noteNewMethod: newMethod "NEVER do this. It is evil." currentMethod _ newMethod. This way work as I expect. But with that comment I understand was intentioned. What is the problem with this? I can´t see it... I'm the devil? Thanks, Javier

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app in app
by Chuck Smith 31 Jan '18

31 Jan '18

Dear Squeakers, I have always had a hard time learning anything until I had a project to do it around. Well that time has come. I need to write an app. that will let me run one application inside another. I would like to have a cad type app. running in a window and then be able to over lay that cad app. with another app. that lets me put hot spots on the cad app. These hot spots will have the ability to show a colored outline around their perimeter. That outline we would like to be able to turn on and off or make blink. The purpose of the hot spot is to train people how to use the cad app. by showing them where to pick menu items and enter data etc. So the whole things runs like this, we start the cad app. and the tutor app. The tutor app. step by step shows the student where and what bottoms to pic and where and what data to enter. As they enter etc. the app. actually functions and they are able to create in the cad app. Kind of a training wheel effect. Can any one tell whether or not I could do this in Squeak and kind of help me do it. I do have a nephew who is a good programmer but has never used Squeak of small Talk and I would like to get him help me do this app. start using Squeak. Can any one point in the right direction? I would like to do the same thing for learning Squeak. Once we learn how to do it for the cad app. I will do it for the Squeak community and make it free. Sincerely, Chuck Smith

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Installing Filetree
by Bert Freudenberg 02 May '17

02 May '17

Hi all, Dale has been working on a Squeak version of FileTree, which is a Monticello repository backed not by zip files, but a tree of individual class files that can be versioned using git, svn, etc: https://github.com/dalehenrich/filetree/blob/master/doc/SqueakInstall.md Since I don't like cluttering my image with unrelated things, here's how to load it using just Installer - provided you have an up-to-date trunk image with the fixes I posted today: ======================== "Bootstrap from squeak43 branch in squeaksource3" Installer ss3 project: 'FileTree'; install: 'MonticelloFileTree-Core.squeak43'. "Load from local filetree repository (cloned squeak4.3 branch from github into image folder)" Installer monticello mc: (MCFileTreeRepository directory: (FileDirectory uri: 'filetree/repository/')); install: 'MonticelloFileTree-Core' ======================== If you have an older image without the new fixes, giving an explicit version number for the ss3 bootstrap should make it work (e.g. 'MonticelloFileTree-Core.squeak43-dkh.70'). - Bert -

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New, faster RISC OS Squeak
by Chris Cunnington 01 Oct '16

01 Oct '16

I get a File 'System:Modules.StreamMan' not found error. I take it from here [1] [2] that StreamMan is short for StreamManager. And that it should be in the sharedsoundbuffer.!System folder. I shift+double clicked and followed !Shared.350.Modules to see StreamMan in this directory. The file appears present but still there is an error. Chris [1] http://permalink.gmane.org/gmane.comp.lang.smalltalk.squeak.vm.devel/9468 [2] http://www.raspberrypi.org/phpBB3/viewtopic.php?t=29504&p=278048

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Environments update
by Colin Putney 25 Nov '15

25 Nov '15

Hi all, So I've been plugging away at Environments, and have a new implementation that supports renaming, but I wanted to get some feedback before figuring out the sequence of commits necessary to update the trunk safely. The idea is to support this kind of scenario: seaside := (Environment named: #Seaside) import: Smalltalk globals; importSelf; exportSelf; yourself. magma := (Environment named: #Magma) import: Smalltalk globals; importSelf; exportSelf; yourself. app := (Environment named: #AwesomeApp) import: Smalltalk globals; import: seaside; from: seaside import: {#Session -> #SeasideSession}; import: magma; from: magma import: {#Session -> #MagmaSession}; importSelf; exportSelf; yourself. In order to have the decompiled code use the correct names, I've changed the way lookup works. Instead of moving bindings from one environment to another, we now create a separate set of bindings for each environment, and copy the values (i.e., classes and globals) into a new binding when a binding is imported. I had originally thought to use something like #changed:/#update: to keep all the bindings in sync, but then I realized that ClassBuilder does a #becomeForward: updates a class. So it's really only globals that could become out of sync between environments. Since we have very few globals in the image, and they basically never change, an update mechanism may not be necessary in practice. So, here are some possible ways to proceed: 1. Use #changed:/#update: or something similar to keep keep global variables in sync. 2. Idea from Eliot—adopt the same convention as VW, and send #value to the binding on every access. Then we could have a special Alias bindings that forward the #value message to the original binding. 3. Share bindings for global variables between environments and disallow renaming of globals. 4. Special case the traditional globals such as Transcript and Display, and disallow the creation of new globals. Anyhow, I'd appreciate a code review from anybody who's interested in this stuff. To take a look, file the attached (hand edited) change set into an updated trunk image. Thanks, Colin

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Re: [squeak-dev] Ometa vs XTreams PEG, PetitParser, Helvetia
by Hannes Hirzel 08 Apr '15

08 Apr '15

On 3/30/11, Nikolay Suslov <nsuslovi(a)gmail.com> wrote: > >From conceptual and practical point of view, > OMeta - is not yet another "system tool" written for Squeak or another fork, > in contrary to XTreams (a generalized stream/iterator framework written in > Smalltalk) burned in Pharo. OMeta is a language which allows to simplify an > existed tools in it's hosted language (Squeak, Pharo, JavaScript, etc) where > it is implemented, while not porting, learning and using another ones, like > XTreams. So, redefined tools with OMeta could become really portable and > mobile, ready for using in any other fork, even in another language, like > JavaScript. > > Regards, > Nikolay XTreams is primarily a generalized stream/iterator framework. It contains PEG parser generation facilities, which I assume might use XTreams. If not the PEG parser stuff could be separated. Nikolay, what you write is interesting but too terse for me to understand. If I understand you right you mean that OMeta goes beyond the PEG parser in XTreams and PetitParser (L. Renggli) and Helvetia (L Renggli). In which ways does OMeta go beyond these other tools? AND: Of course very welcome that you run for the board. --Hannes

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OpenGL procedural textures generator (by David Faught) for Squeak 4.4
by Nikolay Suslov 09 Jun '14

09 Jun '14

Hello, I have successfully proceeded in running TweakCore on the recent Squeak 4.4 trunk image (from Jenkins). And one of the famous existed applications developed in Tweak is the OpenGL procedural textures generator by David Faught. I make it also loadable to the current Squeak. You could download the ready to run image from here: http://krestianstvo.org/TweakCoreOpenGL-squeak44.zip or execute in the workspace in own image: "1. Load FFI" (Installer repository: 'http://source.squeak.org/FFI' ) install: 'FFI-Pools'; install: 'FFI-Kernel'; install: 'FFI-Tests'.. "2. Load CroquetGL " (Installer repository: 'http://www.squeaksource.com/CroquetGL') install: '3DTransform'; install: 'OpenGL-Pools'; install: 'OpenGL-Core'. "3. Load TweakCore and Procedural textures application for Tweak" (Installer repository: 'http://sdk.krestianstvo.org/sdk/inbox') install: 'tweakcore'; install: 'Tweak-OpenGL-sn.3'. "4. Set the default settings in Tweak" CDefaultWidgetLibrary setDefaultSettings. "5. Run one of two examples" CProjectMorph open: Wrinkle1. "or" CProjectMorph open: Wrinkle2. The attached screenshot shows the running application. Regards, Nikolay

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