Squeak-dev September 2003

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163 participants
651 discussions

Re: ProjectViewMorph
by Laurence.Rozier＠knowledgearchitects.net 04 Sep '03

04 Sep '03

>Just a quick newbie question for the Squeak experts... I'm trying to create a >button that uses enterAsActiveSubproject to open a project in active mode. I >have all of my ProjectViewMorphs in the world... but my question is - how do I >refer to these morphs when creating my button? The ProjectViewMorphs exist in >the world already, so it's not like I'm initializing new morphs - or is that >what I should be doing? Sending a enterAsActiveSubproject message to a ProjectViewMorph is *one* way to accomplish what you want. You can refer to these morphs a number of ways depending on what state your code has access to. For example you can use submorphsSatisfying: aBlock or submorphNamed: aProjectName. However if you have aProjectName then you could also say (Project named: aProjectName) enterAsActiveSubprojectWithin: World which will allow you to enter projects that don't have ProjectViewMorphs in the current world. Regards, Laurence > >Thanks, >Jeff > > > >

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[ENH] truncatedChanges-ls
by Lex Spoon 04 Sep '03

04 Sep '03

from preamble: "Change Set: truncatedChanges-ls Date: 4 September 2003 Author: Lex Spoon Handle truncated changes files more gracefully. The problem actually can happen, and has been observed at Georgia Tech, e.g. if someone downloads a file but does not complete the download. The current behavior is that pink debuggers pop up; this is extremely confusing for new users when it happens in places like the Browser. The solution in this changeset is to fall back on the decompiler. A more thorough solution should probably trigger a systematic invalidation of all source pointers past the end of the changes file, because as time goes on the changes file will eventually grow large enough to cover the lost code and the routine will start returning random method code for the invalid source pointers." !

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ProjectViewMorph
by jlonglan＠uwo.ca 04 Sep '03

04 Sep '03

Just a quick newbie question for the Squeak experts... I'm trying to create a button that uses enterAsActiveSubproject to open a project in active mode. I have all of my ProjectViewMorphs in the world... but my question is - how do I refer to these morphs when creating my button? The ProjectViewMorphs exist in the world already, so it's not like I'm initializing new morphs - or is that what I should be doing? Thanks, Jeff

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[Q] How to I upload a file to the Swiki ?
by Brent Pinkney 04 Sep '03

04 Sep '03

Hi, I would like to upload a file to the Swiki. I am prompted for a user name and password. Where do I get this user name and password ? Thanks Brent

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SocketStream question
by Mike Rutenberg 04 Sep '03

04 Sep '03

I am having troubles using Sockets and SocketStreams. I am running this with a up-to-date 3.6 VM and image under Windows. Anyone know why I get a 'Connection closed while waiting for data.' exception? Is there anything wrong with this code? Mike ----------- port _ 7357. listener _ Socket newTCP listenOn: port backlogSize: 5. sendStream _ SocketStream on: (Socket newTCP connectTo: NetNameResolver localHostAddress port: port). receiveStream _ SocketStream on: listener accept. text _ '12345678'. sendStream nextPutAll: text. sendStream close. (receiveStream upToEnd = text) ifFalse: [self halt]. receiveStream close. listener close.

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[ANN]Morph Transitions and Effects
by Laurence.Rozier＠knowledgearchitects.net 04 Sep '03

04 Sep '03

Add more "liveness" to your Morphs! This changeset gives Morphs the ability to scroll vertically, fade in and out, cloak and decloak. Registered on SqueakMap and downloadable from: http://www.knowledgearchitects.net/.1dd28a32

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Inlining an html file/page on a swiki
by Doug Way 04 Sep '03

04 Sep '03

This was brought up on the SqF list... is it possible to inline an html file/page in a swiki page? If not, is anyone interested in adding this feature? - Doug Ian Piumarta wrote: > I think this might just be it. > >> I'm not sure if it's still true but it used to be possible to make a >> swiki page that would inline another file/page. > > > And if it won't (or no longer can), let's change it so that it will. -------- Original Message -------- Subject: RE: [Squeakfoundation][Fwd: Re: installing squeak on Debian Woody] Date: Mon, 01 Sep 2003 19:06:45 -0800 From: Tim Rowledge <tim(a)sumeru.stanford.edu> Reply-To: Discussing the Squeak Foundation <squeakfoundation(a)lists.squeakfoundation.org> To: squeakfoundation(a)lists.squeakfoundation.org References: <002b01c370f5$6a925820$1cb8fea9@atlantis> "Andreas Raab" <andreas.raab(a)gmx.de> wrote: > Excellent! That brings up a thought experiment of my own. What if ... you > would merely add a script which inserts your auto-generated matrix into such > a download page? It's a Swiki after all chosen particularly for the ability > to quickly and easily modify and update things. I really don't care how > people update the page - if the process is automated, all the better! I'm not sure if it's still true but it used to be possible to make a swiki page that would inline another file/page. Seems to me that this would make a dandy way to include automagically (or statically) generated sections of The One True Download Table from each port maintainer's favoured place. All we have to do then is agree on the canonical html snippet that will produce the table layout of our dreams. tim -- Tim Rowledge, tim(a)sumeru.stanford.edu, http://sumeru.stanford.edu/tim Strange OpCodes: HEM: Hide Evidence of Malfunction _______________________________________________ Squeakfoundation mailing list Squeakfoundation(a)lists.squeakfoundation.org http://lists.squeakfoundation.org/listinfo/squeakfoundation

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Re: [Q]Populating magma with a large tree
by Chris Muller 04 Sep '03

04 Sep '03

--- afunkyobject <afunkyobject(a)yahoo.com> wrote: > --- In squeak(a)yahoogroups.com, Martin Drautzburg > <martin.drautzburg@w...> wrote: > These are probably simple ones, but I could not quite figure them out. > > But I want the magma database to be much larger than what I ever want > to hold in memory. How can that be done ? You only reference the portion of the tree that you need at any given time. > Another related issue I don't quite understand is the following: if I > want an index on the tree nodes I have to add them to a > MagmaCollection, right ? Right, unless you have another indexing mechanism. However, you can also access objects by oid, but I wouldn't recommend it (poor practice). > Suppose I have the database built and no > object is currently in memory. Then i manage to materialize one tree > node (assume it is a leaf) and delete it. By "delete" I assume you mean to remove it from that tree.. > I will have to remove it > from the MagmaCollection too, right ? If you wish the MagmaCollection to be "in-sync" with the Tree, yes. > But is it in there at all ? I > could have materialized the leaf object by traersing the tree from the > root object without ever using the index. A MagmaCollection is just like any other Collection in terms of referencing objects, so yes, it is in there. If you added your node to an OrderedCollection then it would be in your Tree as well as the OrderedCollection. Removing the node from your Tree would not remove it from the OrderedCollection, and it would not be gc'd, since it is still referenced by the OrderedCollection. Sharing objects. No problem. - Chris __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com

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[ENH] doWhile-control-structures-jf
by julian＠beta4.com 04 Sep '03

04 Sep '03

from preamble: "Change Set: doWhile-control-structures-jf Date: 3 September 2003 Author: Julian Fitzell Add #doWhileTrue: and #doWhileFalse: to BlockContext. They evaluate the receiver once, and then continue to do so every time the condition block passed in is true or false (respectively). This is similar to the do...while control structure in many other languages. These methods are much more intention revealing than having to use #whileTrue or #whileFalse and combining your loop block and your condition block into one. Also, this way you can get the return value of the last loop block iteration."!

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RE: Debugger woes
by Anthony Hannan 04 Sep '03

04 Sep '03

Hi Andreas & Terry, >> I wanted to execute the unwind blocks in the context of the >> terminating process and not the calling process. Meaning if >> an unwind block raises an exception, an exception handler in >> the terminating process will handle it and not one in the >> calling process. > Ah, I see. Is this the "standard" semantics? I don't know. But its seems correct since the programmer writes the ensure: unwind block in the same context as the protected block, and the protected block is assumed to be executed within the handlers of the current thread. > One more question because I'm sure you must have thought > about it: Do you have any idea about an idiom that can be used for > retrieving the active process in the context of a debug session? Yes, "thisContext process". This is also better for a muli-threaded environment. Its semantics is: give me the process that is executing this context. It's not: give me the supposed only process running. To implement it, the bottom context could point to owning process. Or, while Squeak remains single threaded, ContextPart>>process could be a simulation-guard primitive that always fails and returns "Processor activeProcess". When simulating the simulator can catch this guard primitive and return the process being simulated. For your other problem of knowing when a process is being debugged or not, I would generalize your debugger field to a processor field. processor would point to the process or Processor that owns it (running it). I would even combine myList and processor into a single field. So if it is: nil -> no processor, suspended; Processor -> running; queue -> ready to run; Semaphore -> waiting for signal; a Process -> simulating. The processor field would also indicate who has a lock on it. Again, in a multi-processor environment this processor field would be necessary (if we didn't want to search all processors to find out who is running a process). Cheers, Anthony

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