Squeak-dev January 2003

squeak-dev@lists.squeakfoundation.org

148 participants
312 discussions

[BUG][FIX] A Morph that rendered by a TransformationMorph is not saved correctly
by Kazuhiro ABE 14 Oct '03

14 Oct '03

Hi all, A Morph that rendered by a TransformationMorph is not saved correctly. In this case, it needs to save a renderer instead of itself. 1. make an Ellipse morph 2. write a following script: Ellipse turn: 5 3. tick the script 4. save this morph by 'save morph in file' menu of debug halo 5. load the morph by 'load as morph' menu from filelist. 6. tick the script again 7. OOPS!! File in the attached changes, now saving and loading will work. Regards, Kazuhiro ABE NISHIHARA Satoshi

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[FIX] RelativeZipExtractFix-nk
by Ned Konz 12 Oct '03

12 Oct '03

This is a fixed version of the prior posting with this name. Doug noted that it was broken under Windows. from preamble: "Change Set: RelativeZipExtractFix-nk Date: 16 December 2002 Author: Ned Konz Version: 3.4b 16 Dec: This fixes a problem with re-opening a zip in an ArchiveViewer under Windows (by opening zips read-only), as well as fixing extraction with subdirectories under Windows. 13 Dec: This ensures that zip extraction relative to a given directory works properly, and should eliminate the infinite recursion noted on the Mac. It lacks AcornFileDirectory>>relativeNameFor: ; this should be added if necessary before adding to the update stream. "!

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[FIX] WeakMessageSend2-nk-rw
by Ned Konz 12 Oct '03

12 Oct '03

from preamble: "Change Set: WeakMessageSend2-nk-rw Date: 8 December 2002 (v2) Author: Ned Konz and Rob Withers v2: Eliminated WeakMessageSendError; value* now silently returns nil if receiver or arguments have been GC'd. This defines a simple MessageSend where the receiver and arguments are held onto weakly. And it changes the NuBlue event registration to use the WeakMessageSends instead, so that subscribers can be garbage collected. "!

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[FIX] ProjectArchiveFixes-nk
by Ned Konz 05 Oct '03

05 Oct '03

from preamble: "Change Set: ProjectArchiveFixes-nk Date: 20 December 2002 Author: Ned Konz My recent changes to fileName in ArchiveMember broke project loading in non-Unix systems. This reverts fileName so that it returns the raw Zip name, and adds localFileName for use when you need a name that's compatible with the local file system. "!

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[FIX] Another Acorn FileDir bug fix
by Tim Rowledge 05 Oct '03

05 Oct '03

Should have been in the update 5141 but presumably I sent the wrong dang file. Sigh. tim -- Tim Rowledge, tim(a)sumeru.stanford.edu, http://sumeru.stanford.edu/tim Useful random insult:- Has a one-way ticket on the Disoriented Express.

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[FIX] ClassCommentFix-nk
by Ned Konz 05 Oct '03

05 Oct '03

from preamble: "Change Set: ClassCommentFix-nk Date: 26 November 2002 Author: Ned Konz Version: 3.4a Changing class comments (and reverting them) caused walkbacks. "!

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SqueakMap & monticello feature requests
by Stephen Pair 22 Sep '03

22 Sep '03

First, an easy one...I'd like the ability to browse the code of certain packages on SqueakMap (could just do the easy ones like change sets and *.st packages first)...it would be a little more difficult for SARs, but shouldn't be impossible. Now for a more elaborate request involving SqueakMap and Monticello...what I would like in Monticello is the ability to assign a version string to a package (but still have the auto-generated version numbers). Then I'd like the ability to directly export a package version to another repository. And, I possibly might want to be able to organize repositories in a hierachical fashion and have a "promote" capability that would simply export a package version to the "parent repository" in the hierarchy. The version string would enable me to correlate versions in multiple repositories (since the internal version number would not match up). Package versions would have to have a version string before they are allowed to be exported. Once a package has been exported to another repository, its version string would become immutable (in both repositories). Then, I'd like SqueakMap to be able to register a package that resides in a Monticello repository and have SqueakMap (server or client, whichever works best) be able to communicate with the repository to pull version information, etc for the package. This of course then implies that there needs to be some measure of security in Monticello that would allow read-only access but restrict update access. Why do I want these things? So that I can have a local repository on my laptop for my packages, have a shared private repository for projects that I'm working on with other people, and have a public respository for published projects accessible through SqueakMap. As I work, I'll create versions in my local repository. I'll occassionally publish versions to the shared repository, and when ready, I'll finally push versions out to the public repository. Perhaps a simply hierarchy of repositories would not be sufficient...instead, I might want to simply be able to "link" repositories (and name the repositories) and be able to "push" packages between them. The linking would serve no other purpose than to make it simple to "right click a package version, and 'push' it to one of a list of linked repositories". - Stephen

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RE: destructors, how?
by Peter Crowther 18 Jul '03

18 Jul '03

> From: Ragnar Hojland Espinosa [mailto:ragnar@linalco.com] > I want to automatically call self terminate on an object on > destruction (or when it goes out of scope..) Smalltalk objects are not 'destroyed'. They are garbage-collected at some time after no other object references them. The 'some time after' could be microseconds or days. > I can't find out how to write a destructor > or something functionally equivalent. Check out implementors of 'finalize' (IIRC). In essence, you hold onto the object using a weak array; are notified when it is garbage-collected; and clear appropriate fields based on copies of the data in the object. - Peter

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Collection-Graphs ? (Graph-MathMorph, Connector, Arrow, T-Gen...)
by Samir Saidani 17 Mar '03

17 Mar '03

Hi I'm planning building a Collection-Graph, for my research (phD). I would like to know if there is such a functional Graph classes ? I know several implementations : - MathMorph (The GraphWrapper implementation seems not to work in 3.2, and http://mathmorphs.swiki.net/44 - GraphAlgorihtms.zip is unavailable :-() - Connector-Morph (It's not truly an implementation of Collection-Graph, but it can be use to display a Graph, with MorphicWrapper). - T-Gen implements a Collection-Graph too, but the implementation is oriented parsing... - Arrow implements a Graph, with a new and original manner, I have to see if it's possible to encapsulate the common abstraction of graphs (I mean nodes, edges...). Do you know others implementations ? Thanks at all ! -- Samir SAIDANI PhD in CS / Doctorant en informatique web : http://www.info.unicaen.fr/~saidani Universite de Caen - Laboratoire GREYC tel : 02-31-56-74-30 Equipe MAD - Campus II - 14032 Caen Cedex fax : 02-31-56-76-30

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Re: [Modules] C and Smalltalk modules
by Anthony Hannan 10 Mar '03

10 Mar '03

Hello again, here's a simpler description of the modules I presented in my previous email. A module is an object that introduces new objects and specifies changes to existing objects in imported modules. When a module is linked its changes are applied to the existing objects. When a module is unlinked its changes are undone. A module is automatically linked when a process that has the module in its environment becomes active. Process has a new instance variable called environment that points to a module. A module is IN an environment iff the environment directly or indirectly imports the module. A module is automatically unlinked when a process that does NOT have the module in its environment becomes active. Pointers that cross module boundaries are converted to identifiers when unlinked and converted back to pointers when linked. For example, a class Foo introduced in ModuleB may have its superclass Bar introduced in ModuleA, an import of ModuleB. When ModuleB is unlinked, Foo's superclass will contain the identifier #Bar. When it is linked back it will contain the class Bar. If there is no global pointing directly to Bar, its identifier will specify a path to Bar from a global, for example #Classes.Bar. Modules only deal with objects and identifiers and is independent of any class (or classless) structure. Thanks, Anthony

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