Squeak-dev December 1999

squeak-dev@lists.squeakfoundation.org

146 participants
451 discussions

Re: Closing in on 2.7 - not
by Dan Ingalls 23 Dec '99

23 Dec '99

Folks - In case you haven't figured it out, I am slipping the release of 2.7. This is due to a number of conspiring factors: A new competing internal project at SqC PacBel delaying installation of my ISDN line by two more weeks Disney name server being frequently inoperative Normal holiday distractions A desire on my part to include a further pass at making environments viable, as well as a few other fun enhancements to Squeak If this is important to anyone, it would not be all that hard for me simply to put out an image capturing the current state of 2.7a as a convenience until 2.7 is ready. In the absence of any significant objections, or strong desires to the contrary, I would plan to put 2.7 out shortly after the first of the year/decade/century/millenium. While I have your attention, Luciano has supplied us with a nice packaging of his text-to-speech work including even the simple animated faces. I am inclined to include this work in the Squeak release. It adds about 300k, but I think the play value is worth it, and it should be easy to delete (or swap out!) when not required. Again, if you have any strong feelings to the contrary, please SNOFHYP(*). Happy holidays from all of us at Sqeak Central. - Dan (*) Speak now or forever hold your peace

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Re: Closing in on 2.7 - not
by JArchibald＠aol.com 23 Dec '99

23 Dec '99

=> 12/23/99 11:11:33 AM EST, Dan.Ingalls(a)disney.com => << If this is important to anyone, it would not be all that hard for me simply to put out an image capturing the current state of 2.7a as a convenience until 2.7 is ready. .... please SNOFHYP(*). >> Dan-- I have a few fixes and enhancements which I have been wanting to test against 2.7 (without going through Test Pilot image creation). This low priority, but perhaps there are others in a similar situation. Whatever you decide, please include me on 2.7a distribution, if one is made. Thanks, and happy Holidays, Jerry.

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[enh] optional buttons and annotation pane for MVC debugger window(s)
by Stephan B. Wessels 23 Dec '99

23 Dec '99

--------------6B486B8A873A47A52F1E7D3E Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit ....tested with V2.7a and it seems to be okay. - Steve --------------6B486B8A873A47A52F1E7D3E Content-Type: application/x-unknown-content-type-cs_auto_file; name="mvc-debugger-buttons.23Dec1023.cs" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="mvc-debugger-buttons.23Dec1023.cs" J0Zyb20gU3F1ZWFrMi43YWxwaGEgb2YgMTAgRGVjZW1iZXIgMTk5OSBbbGF0ZXN0IHVwZGF0 ZTogIzE3MjZdIG9uIDIzIERlY2VtYmVyIDE5OTkgYXQgMTA6MjM6NTUgYW0nIQ0NIURlYnVn Z2VyIG1ldGhvZHNGb3I6ICdpbml0aWFsaXplJyBzdGFtcDogJ3NidyAxMi8yMy8xOTk5IDEw OjAwJyENYnVpbGRNVkNEZWJ1Z2dlclZpZXdMYWJlbDogYVN0cmluZyBtaW5TaXplOiBhUG9p bnQNDQl8IHRvcFZpZXcgc3RhY2tMaXN0VmlldyBzdGFja0NvZGVWaWV3IHJjdnJWYXJWaWV3 IHJjdnJWYWxWaWV3IGN0eHRWYXJWaWV3IGN0eHRWYWxWaWV3IGRlbHRhWSB1bmRlclBhbmUg YW5ub3RhdGlvblBhbmUgYnV0dG9uc1ZpZXcgfA0Jc2VsZiBleHBhbmRTdGFjay4NCXRvcFZp 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Re: Redundant code in Integer protocol arithmetic?
by Andres Valloud 23 Dec '99

23 Dec '99

Hi. > In Integer protocol arithmetic (similar in '-'): > Does anybody knows the sense of the message #normalize here? I think it > is senseless for integer arithmetics, because #digitAdd: results in > correct normalized numbers. The only problem could be that someone calls > #+ with a non normalized number as argument, but I think... I think #normalize is there because of LargeIntegers... they can get very big with leading zeroes, so #normalize takes care of that... yet, the lines you specifically referred to point to that if in a+b, a sign == b sign, then it normalizes... I think it should be the other way around. When adding, normalize becomes useless because you add bits, you can't reduce the amount of bits of a sum by adding numbers of the same sign. But if a sign ~= b sign, then you may end up with less bits, hence you really need #normalize. Perhaps it should be the other way around? Andres.

2 1

Re: Feedback about the scripting area
by Stephane Ducasse 23 Dec '99

23 Dec '99

> >We would like to use a Swiki were every child could share with the > >other ones the scripts he like the most > > This is really great, Stephane! It's terrific that you're developing > some alternative scripting options for Squeak and trying them out > with kids! Sorry to disappoint you but I'm not! I had two days for doing something that works and that I can control so I took the low low approach: I just implemented a stupid adpated like Pen class with the semantics I needed. Because I wanted to contorl the interface of that stuff: what are the important message that you could use. But I still want to use a wiki so that the children show to the other ones what they are doing. I'm redaing the book of abelson Quite impressive (the end) for the beginning I guess that we can say more about programming and intoruding the concept. I'm always in tension between provided something that hide the complexity and just expalining it. For example I want to introduce the idea of methods: code that the turtle can learn and I was wondering if I should use block (pretty bad) or I should implement a mini browser (but in squeak that will kill me) or if I should just use the normal browser. I think that the bets solution would be the second one. > But I think that the basic idea is viable, and would be really > effective for the kind of use you describe. If you're interested, > we'd be interested in working with you to try to improve ActiveSwikis > so that they'd be usable for students. That may be something interesting for the future. I'm really thinking that there is somethign to do for children with such turtle nothing is new but in france they use word for teaching "computer" to children and I would like to try to influence that. My plan is the following: - first have a draft view of all the topics we can teach with a stupid turtle. basic functioanlity, angle, color, loop, variables, method (parameters), recursion, - second enhance the turtle with smell and vision this was quite fun in the abelson book. - a third or second step would be how the turtle is implemented and intorudction to oo. ;) - in the same time check how the children react, see how I can define a dedicaced browser for them I see that over one year depending on how my wife works. Because I want to let her produce as much as material as possible or write the first draft and that she refine it. - for the active wiki I could be interesting to see how far you can go to produce a stable one because I will not call them student but children ;). if we could use them as an alternative to the full squeak system that could be a good alternative.

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Re: [ENH] CCodeGenerator2
by Stephan Rudlof 23 Dec '99

23 Dec '99

Dear Andrew, this is very neat and you are very _fast_, too (nearby christmas...). It's interesting for me how readable constructs in Smalltak are leading to tricky constructs in C: This shows that ST has good expressive power for control structures in comparison with C! Thank you! ....(see below) "Andrew C. Greenberg" wrote: > > This is the same changeset posted in an e-mail with a different title > last night, but without the Y2K postscript. (I'm going to have to > stop working until the wee hours on this stuff). > > "Change Set: CCodeGenerator2 > Date: 21 December 1999 > Author: Andrew C. Greenberg > > Improves compilation of #whileTrue, #whileFalse, #whileTrue: and > #whileFalse: builtins. CCodeGenerator (and hence, the named > primitive sompilers) now generate loops of the following forms, as > appropriate: > > SMALLTALK EXEMPLAR GENERATED CODE > > [cond] whileTrue: [stmtList]. while(cond) do {stmtList} > > [cond] whileFalse: [stmtList]. while(!(cond)) do {stmtList} > > [stmtList. cond] do {stmtList} while(cond) > whileTrue. > [stmtList. cond] > whileTrue: [] > > [stmtList. cond] do {stmtList} while(!(cond)) > whileFalse. > [stmtList. cond] > whileFalse: [] > > [stmtListA. cond] while(1) { > whileTrue: [stmtListB] stmtListA; > if(!(cond)) break; > stmtListB > } Indeed this solution is better than the one before: exp1. while(condition) { exp2; exp3; exp1; } > > [stmtListA. cond] while(1) { > whileFalse: [stmtListB] stmtListA; > if(cond) break; > stmtListB > } > > " > > Name: CCodeGenerator2.4.cs > CCodeGenerator2.4.cs Type: unspecified type (application/octet-stream) > Encoding: base64 Merry Christmas, Stephan -- Stephan Rudlof (sr(a)evolgo.de) "Genius doesn't work on an assembly line basis. You can't simply say, 'Today I will be brilliant.'" -- Kirk, "The Ultimate Computer", stardate 4731.3

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[ENH][GOODIE] Alignment for SimpleHierarchicalListMorph and DirectoryExplorer
by Bernhard Pieber 22 Dec '99

22 Dec '99

------=_NextPart_000_009E_01BF4CD4.DE8E2AE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I have attached two small change sets: "Change Set: HierarchicalListAlignments Date: 22 December 1999 Author: Bernhard Pieber This change set adds two minor features to Bob Arning's SimpleHierarchicalListMorph: First it makes sure that all the columns (besides the first) are aligned vertically. This was not the case for different indentation levels. Second, it allows to specify an alignment (left, center or right) for the contents of each column." My thanks go to Bob Arning for the SimpleHierarchicalListMorph and the ObjectExplorer. They were really easy to use! I am sure that I reinvented the wheel when I programmed a method for the alignment of text in the FormCanvas class. I looked around a little but I did not find the "proper" way to do this. Perhaps something else should be used instead of the QuickPrint class? Any suggestions would be welcome. The second change set uses the first to show directory structures in a hierarchical list: "Change Set: DirectoryExplorer Date: 22 December 1999 Author: Bernhard Pieber This change set implements the DirectoryExplorer which allows to view directory contents using Bob Arning's SimpleHierarchicalListMorph and requires the change set HierarchicalListAlignments. It does not access the file system directly but uses a class DirectoryNode which can be used to cache a certain directory structure. The DirectoryExplorer is not yet very useful except as an example for the use of the SimpleHierarchicalListMorph and the alignment enhancements." As this is my first code contribution to Squeak I want to take the opportunity and thank you all for this wonderful environment! It is exciting to watch Squeak evolving at such an amazing speed in so interesting directions. And it really captures my imagination. I wonder how it will look like a year from now! Merry Christmas and a Happy New Year. -- Bernhard ------=_NextPart_000_009E_01BF4CD4.DE8E2AE0 Content-Type: text/plain; name="HierarchicalListAlignments.22De" ; x-mac-type="65417070" ; x-mac-creator="43534F6D" Content-Disposition: attachment; filename="HierarchicalListAlignments.22De" Content-Transfer-Encoding: imap_stub 0,2608,2,4163,0, ------=_NextPart_000_009E_01BF4CD4.DE8E2AE0 Content-Type: text/plain; name="DirectoryExplorer.22Dec1118pm.c" ; x-mac-type="65417070" ; x-mac-creator="43534F6D" Content-Disposition: attachment; filename="DirectoryExplorer.22Dec1118pm.c" Content-Transfer-Encoding: imap_stub 0,2608,3,7291,0, ------=_NextPart_000_009E_01BF4CD4.DE8E2AE0--

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Re: allowSysWindowEmbedding (A y2k countdown clock)
by Bob Arning 22 Dec '99

22 Dec '99

On Wed, 22 Dec 1999 12:22:06 -0800 Scott Wallace <Scott.Wallace(a)disney.com> wrote: >choose "start being sticky" from >the selector-finder-window's halo menu. > >(Request for opinions: should this option perhaps be offered, more >directly, in the window's title-bar menu? It's a close parallel to >the item that lets you decide whether the window should be closable >or not.) Sounds like a good one to me. When I play FreeCell, the first thing I do is make the board sticky so I don't throw it all over the place. Of course, FreeCell doesn't have a title-bar menu, but it's the thought that counts. Cheers, Bob

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Re: [ENH][GOODIE] Time Zone Support for Squeak
by Stan Heckman 22 Dec '99

22 Dec '99

Dave's PointInTimeNowObject describes itself as: I am based on the naive assumptions that time can be represented as a single continuum which may be experienced identically at different physical locations and velocities, and such that two observers in two different locations can identify a single PointInTime as a simultaneous event. These assumptions are not valid when relativity is taken into account, but are acceptable for use in Newtonian physics and Smalltalk. I think it isn't really as bad as that. Time is experienced differently by different observers. However, UTC includes for free, no extra cost, its own preferred reference frame. Using this frame, two observers may identify a single PointInTime as a simultaneous (in that frame) event. Of course, if I am in a significantly different reference frame, then I will experience local seconds at a different rate than UTC seconds. But as long as everyone uses the same frame to communicate, that is, so long as Dave's methods all refer to time in UTC, then there is no ambiguity. There are relativistic problems with UTC seconds, but I think these are problems of complexity, not ambiguity. The relation between the rate atomic clocks run on the surface of the spinning, non-spherical earth in its non-circular orbit around the sun and the rate clocks would run in simpler reference frames is messy. A somewhat telegraphic discussion of the complexities is available in section B6 of http://maia.usno.navy.mil/iauc19/iaures.html -- Stan

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Re: allowSysWindowEmbedding (A y2k countdown clock)
by ohshima＠is.titech.ac.jp 22 Dec '99

22 Dec '99

Hi, > Note that the preference "allowSysWindowEmbedding" governs whether > you can drop a system window (such as a selector finder) into a > container. I think most people normally keep this preference set at > "false" because it's a nuisance to have windows disappearing into the > interiors of playfields, book pages, etc. On occasion, however, one > actually does want to embed a window, and placing a window onto a > flap is a prime example of this. Ah, I didn't notice the preference governs it. It works *ALMOST* fine. Thank you. The problem is that when I turned off "allowSysWindowEmbedding" after I put the selector finder on a flap, an accidental click on the title bar brings it out of the flap. Umm... -- Yoshiki

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