Squeak-dev May 1999

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126 participants
289 discussions

[FIX] Unobscured Halo Morph Name
by Doug Way 28 May '99

28 May '99

Here's another fix/enhancement to the name under the Morphic halo: http://www.mindspring.com/~dway/smalltalk/HaloNameFix2-dew.cs Currently, if you bring up the halo on a morph which is near or exceeds the bottom of the screen, you can't see the name of the morph. For me this seems to happen fairly often, and is annoying. This fix now draws the name at the bottom of the screen. (should've thought of this when I submitted my earlier fix with the white background for the halo name...) I also tweaked the degree to which the halo handles go outside of the screen, so that in the case that you're looking at a thin morph (e.g. ScrollBar) at the bottom of the screen, the halo name doesn't completely obscure the lower handles. (The fix is in HaloMorph>>addNameBeneath:string:, plus the tweak in HaloMorph>>addHandles.) - Doug Way EAI/Transom Technogies, Ann Arbor, MI dway(a)eai.com, dway(a)mat.net http://www.transom.com

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Folding editor?
by Edward P Luwish 28 May '99

28 May '99

Does anyone know of a folding editor implemented on Squeak or any other Smalltalk that I can get from the archive? If not, I have a pretty interesting project to do, in addition to porting Squeak to EPOC32. If you are not sure what it is, a folding editor is like an outliner, in that you can hide subordinate data behind a short descriptive heading in a hierarchy of headings. Entire branches of the tree can be cut, copied and pasted by simply cutting and pasting the root topic to another part of the tree. A syntax-sensitive editor can be subclassed from a folding editor. There used to be a DEC product like this: you picked a computer language and the extended BNF construct "{program}" appeared on the screen. Each time you select a BNF construct, you can expand it into the right hand side of the BNF production. If the right hand side is a choice (like "{statement}"), a pop-up menu appears with the choices (in a C example, you would see "{if_statement}", "{block}", etc.). Provisions are made for mandatory and optional syntactic constructs, and those that can be repeated. At any point you can give up and just type something, but if you don't, it's a nice aid for syntax checking and consistent coding. There's probably something in Emacs like this, but I never was a big Emaxer. (This could be another nice project, which can reuse existing stuff if you know of any) I would like to have Squeak be my desktop, even if I am writing a novel or a C program. That's why I am interested in tools like this. Ultimately, I want to have a whole suite of PIM and Office tools, such as are found on a PDA or a typical WordSpreadDatabase package like Appleworks, and a multi-language development environment. Ed

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List server problems,,,?
by Peter Smet 28 May '99

28 May '99

I sent two posts yesterday, neither of which got onto the list. I remember other people have also complained about having to repost messages. I am still getting the list traffic, and cc's still get to their destination. Are the people running the list server aware of these problems? Peter

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RE: Comparing Associations
by Jarvis, Robert P. 27 May '99

27 May '99

If I recall correctly the Squeak Central people aren't in any great rush to be "ANSI compliant". Squeak is to be the "next" Smalltalk (in the tradition of Smalltalk-80, Smalltalk-78, Smalltalk-76, -74, and -72, where each newer version made its predecessor obsolete). Looking through the draft version of the standard I have available to me it looks like the Association class is not part of the standard. The following is used as the definition of the Dictionary class: 1.1.1 Protocol: <Dictionary> Conforms To <abstractDictionary> Revision History Draft 1: April 20, 1995 -- Brian M. Barry Initial draft 9/97 group review/revision at Aylmer meeting Description Represents an unordered collection whose elements can be accessed using an explicitly assigned external key. Key equivalence is defined as sending the #= message. Messages none So it looks like Association is simply an implementation artifact, as is the definition of the #= message when sent to an Association. So it looks like they're all "conforming" implementation. Bob Jarvis The Timken Company > -----Original Message----- > From: John Clarke [SMTP:clarkej@cuug.ab.ca] > Sent: Thursday, May 27, 1999 2:27 PM > To: 'squeak(a)cs.uiuc.edu' > Subject: RE: Comparing Associations > > Pierre, > > I'm not familiar with the ANSI Smalltalk standard, nor am > I aware whether Squeak attempts to conform to it. > > But perhaps that's why Association uses the definition for = > it inherits from LookupKey, which simply matches the keys. > > I checked several implementations and found the semantics > for = split as follows: > > VS 3.0 and Squeak require that only the keys match, > while VA and VW 3.0 require that the values match as well. > > (I'm assuming that VA and VW follow the ANSI definition.) > > BTW, did you get a response to whether Thinglab has > been ported to VW? If so, I must have missed it. > > John Clarke > > Pierre wrote: > > Why method = is not redefined properly in class Associations?

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SUnit for Squeak
by Robert Hirschfeld 27 May '99

27 May '99

Hi folks, SUnit, a testing framework written by Kent Beck and Erich Gamma, is now available also for Squeak at http://www.windwardsolutions.com/People/Hirschfeld/Squeak/Squeak.html Cheers :) -Robert ____________________________________________ W I N D W A R D S O L U T I O N S, I N C. Robert Hirschfeld mailto:hirschfeld@acm.org http://www.windwardsolutions.com http://www.prakinf.tu-ilmenau.de/~hirsch

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RE: Comparing Associations
by John Clarke 27 May '99

27 May '99

Pierre, I'm not familiar with the ANSI Smalltalk standard, nor am I aware whether Squeak attempts to conform to it. But perhaps that's why Association uses the definition for = it inherits from LookupKey. I checked several implementations and found the semantics for = wrt Association split as follows: VS 3.0 and Squeak require that only the keys match, while VA and VW 3.0 require that the values match as well. (I'm assuming that VA and VW follow the ANSI definition.) BTW, did you get a response to whether Thinglab has been ported to VW? If so, I must have missed it. John Clarke Pierre wrote: Why method = is not redefined properly in class Associations?

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Better solution to Random>>initializa
by Juan Cires Martinez 27 May '99

27 May '99

The problem with the initialization of a Random is in the statement: seed := Time millisecondClockValue * self hash. which has a problem when self hash evaluates to zero. The solution I propose is to modify that line: initialize " Set a reasonable Park-Miller starting seed " seed := Time millisecondClockValue * (self hash + 1). a := 16r000041A7 asFloat. " magic constant = 16807 " m := 16r7FFFFFFF asFloat. " magic constant = 2147483647 " q := (m quo: a) asFloat. r := (m \\ a) asFloat. Greetings, Juan. PS: I have translated to Squeak the C code to generate random numbers with a normal distribution published in "Numerical Recipes in C", second edition, and implemented the class NormalRandom. Is it legal to publish such code?

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Looking for platform independent libs
by Stephen Pair 27 May '99

27 May '99

Does anyone know of a good platform independent abstraction (C library) for threading and module (i.e. DLLs and share object files) handling? We've looked at threads.h++, but it's not exactly right (and open source is preferred)...also, I once came across such a library for handling modules, but lost the reference. Thanks, Stephen Content-Type: application/octet-stream; name="Stephen Pair.vcf" Content-Disposition: attachment; filename="Stephen Pair.vcf" Attachment converted: Anon:Stephen Pair.vcf 5 (????/----) (0000A80D)

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Squeak on Windows CE again
by Markus Kohler 27 May '99

27 May '99

Oh, I guess I should have RTFM :-( I just found the readme at http://www.sugarWeb.com/Miniatures/Files/WinCE/CEReadMe.htm. Would be nice if it would be also included in the zip file ( maybe I just overlooked it?) ... The path has to be \Program Files\Squeak and I used \Program Files\squeak ... Markus -- Markus Kohler mailto:markus_kohler@hp.com

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Squeak on Windows CE
by Markus Kohler 27 May '99

27 May '99

Hi, After getting my HPJornada 420 last week, I finally had the time to try out Squeak on it. I downloaded sqCERun.zip (585Kb) and sq22CEVM.zip (180Kb) from ttp://www.sugarWeb.com/Miniatures/Files/WinCE/WceToday.htm Unfortunately I couldn't get it running. I first copied all files from sqCERun.zip to a new directory on my Jornada. When I try to start the VM executable with one argument it always pops up a windows saying it could not find the image file, and I should try drag and drop or double clicking on the image. Unfortunately drag and drop doesn't semm to be support for P/PC's and I have not yet found out how to specify the association for Smalltalk image files. I thought I should be able to start squeak by calling the executable with the first argument being the image name, but that doesn't seem to help. The VM from sq22CEVM.zip also didn't work. The Jornada just gives back an error saying that it's not a valid executable. Can anybody help me to get it running ? Markus -- Markus Kohler mailto:markus_kohler@hp.com

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