Squeak-dev December 2005

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[ANN] 6705
by ducasse 08 Dec '05

08 Dec '05

hi all I just pushed out a new version with nearly no fix (just the explore). We are preparing traits inclusion. Stef

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RE: What does Squeak application development look like?
by Ramon Leon 08 Dec '05

08 Dec '05

> > > > Create a class category for this. > > Some of my applications started as a workspace script. I > think that is quite a common pattern in the Smalltalk world > and quite different to other languages. > > Lukas Quite true, workspaces are what I miss in other languages.

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RE: What does Squeak application development look like?
by Ramon Leon 08 Dec '05

08 Dec '05

Here's how I'd do it. > So, when I start an application in another language I: > > 1. Create a directory in which I'll keep the files related > to the new application. There's a good chance that this > directory will be near some other code that I use in the form > of libraries). Create a new image, actually, I'd clone an existing clean image that's already setup for this purpose. > 2. Create a sub-directory in which I'll keep unit tests using > some sort of unit test framework like JUnit. Create a class category for this. > 3. I'll "write the tests first" Same. > 4. I'll write some code for my application, probably driving > a "spike" > through it's functionality in order to get at least one test to pass. Same. > 5. I'll run my tests. This involves starting the application > from a known state (no objects instanced yet, for example), > starting some portion of the application and running it. Same. > 5. Once I've got *something* to work, I'll check all of the > code in my working directory into some sort of Source control > system (probably > Subversion) and continue to write code, checking. Check code into Monticello repository. > 6. I'll periodically run my application to see how its > working from a user perspective. Generally that application > starts from a known state and at a known entry point. The > start up state may differ slightly based on saved information. Same. > 7. Eventually, I'll be done and I'll deploy the application. > Generally I'll use some tool (Ant build files, Python setup > files) to build the release. I'll generally test the > deployed release in a "fresh" > environment to duplication a potential user's experience. Image is already built, simply deploy it, or build new image by loading code from Monticello into it. > 8. I'll go on to the next application. Ditto. > So, given the above framework of a developer's day, what > would the corresponding day look like with Squeak? Feel free > to point me to other discussions or documentation. As I > said, I've gotten hints about much of the above but I'm > trying to synthesis it into the whole "story". > > Best regards and thank you for your time, > > Keith Fieldhouse

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Problems with OSProcess and vm-display-quartz
by Lukas Renggli 08 Dec '05

08 Dec '05

I am usually using the Unix VM on OS X using the Quarz display driver, however most tests of OSProcess seem to fail using this configuration, whereas they perfectly run when using the X11 display driver. I am wondering what the constraints are using OSProcess together with the Quarz display driver? Are #forkSqueak and #forkHeadlessSqueak supposed to work in this configuration? Thanks, Lukas -- Lukas Renggli http://www.lukas-renggli.ch

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Re: The Weekly Squeak
by Jason B Burke 08 Dec '05

08 Dec '05

Giovanni Corriga wrote: "squeak-mentors.org Jason Burke is a Squeak newbie who has been recently digging into Squeak. He thinks that, even though Squeak's syntax is easy, becoming proficient with Squeak's class library can be a daunting task. For this reason, he has started Squeak Mentors, a website which will collect many resources and tutorials on learning Smalltalk and Squeak. Wilkes Joiner has sent a reply, pointing to a Squeak tutorial he has written." *sputter*...*cough*...*spit*... Ack! I wasn't ready. I plead temporary insanity due to full-time job and finals at school last week =). To be honest and perhaps shine more light on the newbie's learning curve, I pretty much gave up on Squeak late last week and tried to go back to my beloved Python. I say "tried" because it didn't work. I keep going to back to Squeak even though I was totally frustrated. So, the truth is that you guys have completely ruined me now, and I'm no good for anything else =). However, something happened yesterday that I can't explain. While reading John Maloney's Morphic tutorial, everything just suddenly made sense. There I am sitting at my desk, when that big "ah-ha" light bulb goes off, and all I can do is start laughing. Now, I'm not exactly sure exactly what I understand at this point, but I'm no longer pulling out my hair and swearing at the computer, so that has to be a step in the right direction. In fact, I was even poking through the String class last night and reading the class comments (*Gasp*). So, after all of this, I think I have a better feel for the Big Picture (TM), and while I no longer think it's a good idea to write yet-another-squeak-tutorial-that-goes-over-the-interface-basics, I do think it's a good idea to finish up my page with pointers to the good tutorials out there (which I should have done this weekend). I think I'm going to move onto useful class features and examples of their use next. At this point, the big stumbling block for me has been, funny enough, using blocks semi-effectively (heck, I'd even settle for slightly-effective at this point =). Any pointers to some help with this would be greatly appreciated (the root of my problem seems to be with understanding scope and getting data into and out of a block). Also, in other news, I'll be pitching a proposal for a kids mentoring program (in which I plan to use Squeak) to my school's computer club this Friday night, and if that goes well, hopefully we'll start working with some kids early next year (this will be the third mentoring program I've worked on). Anyways, there's my babble. Jason

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I haven't received anything from squeak-dev since 27 November 2005
by Dean_Swan＠Mitel.COM 08 Dec '05

08 Dec '05

Could somebody (anybody) let me know what's up? It seems that I am not the only one to have experienced this. -Dean

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Re: DDE-server comunication?
by Darius Clarke 08 Dec '05

08 Dec '05

I believe Dolphin Smalltalk can use DDE. http://www.object-arts.com Maybe a mix of the two applications would work for you, one calling the other.

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DDE-server comunication?
by Marcus Pedersén 07 Dec '05

07 Dec '05

Hi! Does Squeak support DDE-server comunication? I have browsed through classes but havent found anything. If there is support for it please share on how to..... Many thanks in advance! Marcus

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drawBezierShape in drawOn
by TJ Leone 07 Dec '05

07 Dec '05

Squeakers, I finally got back to looking at Squeak, and I have my first dumb question. I tried to make a class called AMorph (subclass of Morph) with the following drawOn method: ------------------------------------------------------------------------------ drawOn: aCanvas "draw a Bezier shape" aCanvas asBalloonCanvas aaLevel: 4; drawBezierShape: {30 @ 30. 30 @ 200. 200 @ 10. 200 @ 10. 50 @ 150. 50 @ 30. 50 @ 30. 30 @ 30. 30 @ 30} color: Color red borderWidth: 1 borderColor: Color green --------------------------------------------------------------------------------- To get it to draw I execute the following in a Workspace: AMorph new openInWorld. After overwriting defaultBounds, the shape draws fine, but it disappears when I drag it around and try to drop anywhere besides the upper left corner of the World. It looks like I need to do something to tell AMorph that the control points should be relative to its position, but I'm not sure how to that. How do I fix this method? --TJ At 12:10 PM 11/3/2005, you wrote: >Hi TJ! > >When I worked on Stencili, a would-be vector graphics in Squeak, I >worked on some graphical primitives. Unfortunately, it's been a while, >and I don't have any of the code handy. To get a head start, your best >bet may be the Bezier classes that already exist in Squeak. Let me >know if you need some help getting started. (interestingly, I decided >to return to Squeak only this week). > >Also, some reading on arcs represented : >http://graphics.stanford.edu/courses/cs248-98-fall/Final/q1.html >http://www.tinaja.com/cubic01.asp >http://www.tinaja.com/glib/bezarc1.pdf > >The first link shows a specific example of a 90 degree arc represented >with Bezier segments. The last one is a more generic one. > >Bolot > > >On 11/2/05, TJ Leone <tj(a)leonelearningsystems.com> wrote: > > Hi, > > > > I used to be a programmer at Northwestern. Maybe we met when I was working > > on the ITR project? Anyway, I'm thinking about trying to port an > > application of mine from Java to Squeak and Je77 said you might be able to > > help me out. > > > > I need a class similar to the Arc2d class in Java. Have you begun or > > completed work on anything like this? > > > > The application I'm looking to port (called Circular Reasoning) is > > available for download at > > http://www.leonelearningsystems.com/circular_reasoning.htm. > > > > --TJ > > > > >Date: Tue, 1 Nov 2005 14:30:02 -0500 > > >From: "Jochen F. Rick" <nadja(a)cc.gatech.edu> > > >To: Eddie Cottongim <cottongim(a)earthlink.net> > > >Cc: tj(a)leonelearningsystems.com, squeakers(a)cc.gatech.edu > > >Subject: Re: [Squeakers] [Fwd: Arcs?] > > >User-Agent: Mutt/1.4.2.1i > > > > > >Hi TJ, > > > > > >Bolot was at one time working on something like that. I think he got > > >pretty close. You may want to contact him. I assume you met him back on > > >the ITR project. His new e-mail address is bolot(a)usa.net > > > > > >The other people to contact would be the MathMorphs people: > > >http://www.dm.uba.ar/MathMorphs/ > > > > > >Peace and Luck! > > > > > >Je77 > > > > > >On Mon, Oct 31, 2005 at 09:47:58PM -0500, Eddie Cottongim wrote: > > > > I don't think theres anything that does that off the shelf. But there's > > > > PolygonMorph, which might allow him to build things piecewise. Theres > > > > also the ST-80 Paths package, that has Arc, Circle, Line, etc, but > > > > doesn't have drawing support in Morphic. > > > > > > > > One approach to creating "SliceMorph" woud be to subclass PolygonMorph > > > > and provide some methods to control a fixed set of points from a circle > > > > point of view. The only difficulty I see here is that for a slice, you > > > > want smoothing applied to only the points on the outside of the arc. > > > > Another one would be to look at EllipseMorph and add some arbitrary > > > > circle properties and use a fancier draw method. > > > > > > > > Eddie > > > > > > > > > > > > Mark Guzdial wrote: > > > > > > > > >Can anyone give TJ a hand here? > > > > > > > > > >-------- Original Message -------- > > > > >Subject: Arcs? > > > > >Date: Wed, 26 Oct 2005 09:03:14 -0500 > > > > >From: TJ Leone <tj(a)leonelearningsystems.com> > > > > >To: guzdial(a)cc.gatech.edu > > > > > > > > > > > > > > > > > > > >Mark, > > > > > > > > > >I don't know if you remember me. We met once a few years ago on a > joint > > > > >project with Georgia Tech, U of Mich, and Northwestern. I was part of > > > the > > > > >Northwestern contingent. > > > > > > > > > >Anyhow, I was thinking about using Squeak for some work I'm doing now, > > > but > > > > >I can't find a class like the Arc2D class in Java. I want to be > able to > > > > >create arcs, circle segments and sectors of arbitrary orientation, > > > central > > > > >angle, and radius length and change them on the fly. Is there such a > > > > >Squeak class? > > > > > > > > > >If not, how would I go about creating one? I'm a total Smalltalk > > > > >newbie. I know there's a class called CurveMorph and I think I saw a > > > > >method called beSmoothCurve someplace, but I don't know anything about > > > > >drawing programmatically with Squeak. > > > > > > > > > >I tried posting this question to squeak-dev, but I haven't heard > anything. > > > > > > > > > >--TJ > > > > > > > > > > > > > > >TJ Leone > > > > >Leone Learning Systems, Inc. > > > > >237 Custer Ave > > > > >Evanston, IL 60202 > > > > > > > > > >Email: tj(a)leonelearningsystems.com > > > > >Phone: (847) 951-0127 > > > > >Fax: (847) 733-8812 > > > > >Web: http://www.leonelearningsystems.com > > > > > > > > > > > > > > > > > > > >------------------------------------------------------------------- > ----- > > > > > > > > > >_______________________________________________ > > > > >Squeakers mailing list > > > > >Squeakers(a)cc.gatech.edu > > > > >https://mailman.cc.gatech.edu/mailman/listinfo/squeakers > > > > > > > > > > > > > > > > > > _______________________________________________ > > > > Squeakers mailing list > > > > Squeakers(a)cc.gatech.edu > > > > https://mailman.cc.gatech.edu/mailman/listinfo/squeakers > > > > > >-- > > >Jochen "Jeff" Rick, PhD Candidate, Georgia Tech College of Computing > > >jochen.rick(a)cc.gatech.edu, http://www.je77.com/, work: 404-385-1105 > > > > TJ Leone > > Leone Learning Systems, Inc. > > 237 Custer Ave > > Evanston, IL 60202 > > > > Email: tj(a)leonelearningsystems.com > > Phone: (847) 951-0127 > > Fax: (847) 733-8812 > > Web: http://www.leonelearningsystems.com > > > > > > TJ Leone Leone Learning Systems, Inc. 237 Custer Ave Evanston, IL 60202 Email: tj(a)leonelearningsystems.com Phone: (847) 951-0127 Fax: (847) 733-8812 Web: http://www.leonelearningsystems.com

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Fw: DDE-server comunication?
by Marcus Pedersén 07 Dec '05

07 Dec '05

Hi! Does Squeak support DDE-server comunication? I have browsed through classes but havent found anything. If there is support for it please share on how to..... Many thanks in advance! Marcus --------------------------------------------------------------------------------

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