Squeak-dev September 2003

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163 participants
651 discussions

Re: Morphic - widget subclassing and inheritance
by Bob Arning 03 Sep '03

03 Sep '03

On Tue, 2 Sep 2003 15:25:39 -0700 Ned Konz <ned(a)bike-nomad.com> wrote: >> via scripting or through >> Workspace direct manipulation but neither tutorial mentions how to >> set up conventional interaction like building dialog boxes, data >> entry forms; how to "wire in" keyboard navigation between data >> entry widgets (e.g. tabbing cycle) etc. > >I believe there are tutorials out there that cover this. > >Anyone with a good pointer? Version 1 of BobsUI was intended to be a very simple example of such concepts, easy to read in its entirety. Cheers, Bob

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Morphic - widget subclassing and inheritance
by Geza Lakner MD 03 Sep '03

03 Sep '03

Dear The Squeakers! I am a newbie in Morphic and Smalltalk, and I just can't get around with this one. First, it is very painful to build and handle a usable, conventional dialog box in Morphic. This was my way, please comment it if there is a more "squeakish" (... elegant..) way to do it: 1. make a morphic project 2. add a system window morph via the World menu 3. add a button via the World menu 4. add a text field via the World menu 5. embed 3-4. into 2 via the halo menu Now, all these GUI mparts are programatically, practically inaccesible in the usual way. They have no global names (just some instantiation number in parenthesis), nor could they be pruned into existing classes via renaming or something like this. The only way I saw, is to subclass each widget. So I subclassed the button, and redefined doButtonAction. For testing purpose it was a tiny 'Transcript show:' message. It worked. I exhaled. Now for the hard part. Although I subclassed the text field, no messages from its superclass were understood by it. I came up with the annoying error "message not understood". I wrote into the previously redefined "doButtonAction" method some possibilities, like "MyTextField contents: 'Hello'" or "MyTextField newContentsFrom: 'Hello'" or even not data setting but query messages like 'contents' or 'currentDataValue' without any success. I thought that inheritance is simply not working so I even tried to redefine the text field's subclass message and send back the message to the superclass with "super contents: 'Hello' '. No success, either. I think Squeak is a very nice platform but conventional programmers will have their hair raised up ;-) with the vastly underdocumented Morphic. Each tutorial picks a bells-and-whistles single morph to sing, turn or gallop around ;-) (I know, I know: Squeak is a schoolboy-oriented environment... ) via scripting or through Workspace direct manipulation but neither tutorial mentions how to set up conventional interaction like building dialog boxes, data entry forms; how to "wire in" keyboard navigation between data entry widgets (e.g. tabbing cycle) etc. I would be very thankful if someone would give me some hints in this direction. Best wishes: Geza

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Re: problems with Squeak on a Compaq Aero 2100-series running WinCE
by Bill Trost 03 Sep '03

03 Sep '03

[note that I'm not a squeak-dev subscriber; fortunately I thought to check the list archive] Gary Fisher writes: Selecting [No] doesn't abort the quit, it just saves the image on the way out (answering [Yes] will quit *without* saving the image). If your image was somehow corrupted before you got this dialog, answering [No] would have saved the corrupted image, including any problems which may have existed at the time. I've reloaded the image and am having the same problem -- Squeak doesn't really show up at all at first, and reselecting it from the start menu brings up the testy dialogs. Bill

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Re: HELP! with plugins
by Bob Arning 03 Sep '03

03 Sep '03

On Tue, 2 Sep 2003 14:58:38 -0600 (MDT) Eric Scharff <Eric.Scharff(a)Colorado.EDU> wrote: >(Apologies for nagging folks again, but I never received answers to any of >my plugin questions. While creating plugins may not be nearly as exciting >as discussing licensing issues, it is far more important to my current >project. :) ) Eric, I'm not sure I can explain all the whys of this, but it appears that other senders of #doPrimitive:withArguments: were from methods where the arguments were already on the stack (your error hapens trying to copy from this stack into the interpreter proxy). I converted your snippet to a class method: ================================================================= 'From Squeak3.5 of ''11 April 2003'' [latest update: #5180] on 2 September 2003 at 6:01:53 pm'! !MyPlugin class methodsFor: 'as yet unclassified' stamp: 'raa 9/2/2003 18:00'! TESTinnerLoopX: a y: b limit: c ^MyPlugin doPrimitive: 'innerLoopX:y:limit:' withArguments: {a. b. c}! ! ================================================================= and, now, MyPlugin TESTinnerLoopX: 1 y: 1 limit: 1 will run. Cheers, Bob

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[Q][morphic] absolute and relative coordinates
by Martin Drautzburg 02 Sep '03

02 Sep '03

I have constructed morph that consists of several submorphs (circles and lines) and embedded this morph into an owning morph. The circles and lines were create with ablsolute coordinates, i.e. as if the upperLeft corner of my morph was 0@0. Once my morph is embedded into its owner its upperLeft corner certainly is not 0@0 anymore and any *new* circles and lines I add then end up outside the morph's bounding rectangle. I can add topLeft to all coordinates and things appear where they should. What is the standard way of doing this, i.e. manipulationg a morph in-situ and contruction a morph ?

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installing squeak on Debian Woody
by Ralph P. Boland 02 Sep '03

02 Sep '03

I tried installing Squeak 3.4 on a PC running Debian Woody but without success. I tried installing squeak on a PC running Linux (Debian Wood7) but failed. I created a subdirectory of my home directory. Then I downloaded the software there and did an install (as root). I then did a man squeak which worked. I did a "which squeak" which finds squeak and a "which inisqueak" which DOES NOT FIND inisqueak. Though I have root privaliges I almost never use it because I know almost nothing about linux except as a user. However, I will buy my first computer in a couple of days and the first thing I want to do is install linux (Debian or Redhat) and then squeak. Though I haven't used Smalltalk in years I am planning a major project to be done using squeak. Can anybody suggest what I am doing wrong; something simple I'm sure. Also, is there a standard place to install squeak? If so, that is where I will put it on my new system. How large a system do I need to run squeak efficiently? Also, how slow is it? I will be building an application that will scale up to some large problems both in terms of memory used and time consumed. Ralph Boland

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squeak license
by ALR 02 Sep '03

02 Sep '03

Hi all, After having 'smalltalk-squeaked' for few months, I am thinking about using squeak for a commercial development. Here are some issues I found about that, and every answer is welcome: - Unix and Windows Squeak vm sources licences: I recently downloaded a linux version of the squeak vm an found several files with the squeak archive : COPYING, LICENSE etc. This distribution does not follow the Squeak License : modified files from the unix vm, actually copyrighted Ian Piumarta and other contributors, can be renamed and used if the copyright notice is replaced by the GPL notice. This should not be an issue for a commercial product build on squeak, as long as the image file (ie the product) is not concerned by this license change to GPL, but stay under SqueakL, it's just a bit confusing for our customers. *** Can someone confirm to me that the image file does not fall under this GPL license ? *** What about changing the unix vm license to SqueakL instead of GPL ? *** What is the status of the win32 vm source(s) on this point : SqueakL or GPL ? - Fonts is another problem in commercial distribution as there are very few free fonts on the web. Most of the fonts who are 'free' are for noncommercial use, and I didn't found one usable, the ttf fonts seems to be garbage with the font reader. This is true for the fonts I found, windows fonts are ok, but copyrighted. *** What is the license status of the Verdana and Tahoma strike fonts of the Zurgle project ? *** Any information and true pointers about *free for commercial use* fonts (Strike or ttf fonts) usable in squeak is welcome. Thank you for your answers Alain

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Re: [Magma] leftover sessions and more
by Chris Muller 02 Sep '03

02 Sep '03

--- Chris Muller <afunkyobject(a)yahoo.com> wrote: > Date: Fri, 29 Aug 2003 13:15:11 -0700 (PDT) > From: Chris Muller <afunkyobject(a)yahoo.com> > Subject: Re: [Magma] leftover sessions and more > To: Martin Drautzburg <martin.drautzburg(a)web.de> > > > They're not dangling. It's just that gc hasn't run yet. YOu can force it: > > Smalltalk garbageCollect > > and you'll see they go away. > > They should also go away on their own after a period of time. > > - Chris > > --- Martin Drautzburg <martin.drautzburg(a)web.de> wrote: > > Chris, > > > > I verfied that two dangling sessions are created by > > newDatabase > > ^ MagmaRepositoryController create: self databaseFile root: Dictionary new > > > __________________________________ > Do you Yahoo!? > Yahoo! SiteBuilder - Free, easy-to-use web site design software > http://sitebuilder.yahoo.com > __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com

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About ESUG 2003
by Stephane Ducasse 02 Sep '03

02 Sep '03

Hi all Just a small email to let you know that ESUG'2003 http://esug2003.esug.org/ was exciting and that we will prepare soon the next edition. Pay attention the dates will certainly change a bit to be in early september (Some of you we have no reason anymore not to attend ;). We got 92 participants. Besides the regular attendees, we got a lot of newcomers this year. ESUG also sponsored 15 student volunteers from all over the world. The conference avenue was simply beautiful. We got 5 excellent invited talks from Corporate Marketing, Embedded-Smalltalk in 100k, New Tools to Smalltalk for .Net. We got for the first time an academic track and the articles are about to be publish in the Journal Computer Languages. We got also a lot of demos made by the attendees: Monticello, Ginsu, Garden, BrowserUnit, CodeCrawler, GNUSmalltalk, StepTalk... This was great. Please have a look at for a summary of the talks: http://wiki.eranova.si/esug/Talk+Notes+And+Slides For the next edition we want to have more *experience reports* to show that **YOU** use Smalltalk for successful solutions in industry, we plan also to add a *business track* where customers can testimony why they use Smalltalk. We are looking for *tutorials*. ESUG will rethink completely its web site so that the community can be in contact with itself. Be prepared to fill our new wiki with all the link to your user groups or mailing-list. The ESUG Board [|] Thanks our sponsors: www.eranova.si, www.comtron.si, www.fja-odateam.com, www.exept.de, www.cincom.com/smalltalk, www.bedarra.com

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parser generator tools
by Ralph P. Boland 02 Sep '03

02 Sep '03

I am about to begin development of a new parser generator tool (as if we didn't have enough of them already). My tool will be designed to parse complex grammars (much more complex than LR(1) grammars) quickly based upon an algorithm I have been developing for years. I refer to the parsing technowledgy as "Meta-Reduction Parsing" because the algorithm does "multiple reductions to an entire subtree at a time". At the moment I am planning to develop it in Smalltalk (Squeak) since the algorithm is quite complex and Java is painful to use. Though the parsers the tool builds are fast (amost as fast as LR(1) parsers, the algorithm to build them is complex and costly both in terms of time and space. Because of this I may have to eventually port the tool to C (at least in part) but for now I will use Squeak. I am wondering what Smalltalk based parser generator tools already exist. I am aware of TGen-2.1 and SmaCC which is based upon TGen-2.1. Are there others? I intend to build the main parser builder engine but I am open to others working on other aspects of the tool, for example GUIs, applications, etc. I would be interested in talking with anyone who wants to build these components. I am also interested in hearing from anyone who wants to use my parser generator and what you intent to use it for. I would appreciate hearing from anyone interested in my project. Thanks Ralph Boland

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