cells-devel June 2008

cells-devel@common-lisp.net

9 participants
13 discussions

[cells-devel] Re: A simple question.
by Kenny Tilton 27 Jun '08

27 Jun '08

Watt Poosanguansit wrote: > Hi Ken, > > I hope you are well. I am starting to code using cell as the models. One thing that I do not understand is when I use accessor method on the slot in the models, I do not get the value back. I would have to use slot-value to get to it. Is that by design? No, something is wrong. Send me some code that behaves as you say. If I had to guess, it would be something that often trips me up too: when Cells hits an error it sets a flag indicating it should cease functioning. So any Cells snippet one might invoke as a toplevel test should begin with (cells-reset) to clear that flag. As a noob of course you are encountering errors regularly, and unless you got lucky you did not run across this Cells secret or if you did would likely not remember it, and this indeed sounds like Cells refusing to run (accessors go straight into Cells code), so this is a strong guess. But it is a guess. :) You can probably just add (cells-reset) at the start of your test code and be OK. if not, send me some code. kt

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[cells-devel] Re: [cello-devel] State of Cello?
by Kenny Tilton 22 Jun '08

22 Jun '08

David Arroyo wrote: > What is the current state of Cello? I can't find the code on > common-lisp.net, but I think it's an interesting project and I'd like to > help in any way I can. I doubt I can help with the code itself but I can > write docs and the like. > > But first I need to find the code :) Try starting from the c-l.net home page and clicking on "repositories" and using the viewcvs interface to get to (a) the cello project and then (b) a tarball (or if you are good at CVS just do it the usual way. Cello/Celtk is in steady use and I am in danger of Actually Releasing in a week or three a big application built atop it. aka, (eq state 'alive-and-well). btw, if you really do get interested and involved I think you can see the first thing the project needs is a maintainer. :) I update CVS on occasion from my code base but do not have the extra time required of serious open source. But first things first: let's see if you can build the fricking thing (estimated at two weeks effort recently by someone who would know). thx for the interest, kenny ps. I cc'ed cells-devel cuz that is where most of the Cellsers coagulate. k

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[cells-devel] celtk notebook widget
by Andy Chambers 17 Jun '08

17 Jun '08

Hi, I made a notebook widget for celtk. It just uses the built-in tile notebook and introduces a "tab" widget which is just a container for stuff you can add to a notebook. On a separate note, I was having trouble getting the latest versions of cells and celtk to play nicely together. I reverted back to cells from March to work on this stuff since that's when I was last working on my expander widget. I'll investigate the problems and try to provide some more useful input later this week. ;--- n o t e b o o k ---------------------------------------------- (deftk notebook (widget decoration-mixin) () (:tk-spec notebook -height -padding -width) (:default-initargs :id (gentemp "NB") :packing nil)) (defmethod make-tk-instance ((self notebook)) (tk-format `(:make-tk ,self) "ttk::notebook ~a" (^path)) (tk-format `(:pack ,self) "pack ~a -expand yes -fill both" (^path))) (defobserver .kids ((self notebook)) (loop for k in (^kids) do (trc "ttk::notebook adds" k (type-of k) (md-name k) (path k)) (tk-format `(:post-make-tk ,self) "~a add ~a -text ~a" (^path) (path k) (text k)))) ;--- t a b ----------------------------------------------------------- (deftk tab (frame-stack widget) () (:tk-spec tab -state -sticky -padding -text -image) (:default-initargs :id (gentemp "TB"))) (defmacro mk-tab ((&rest inits) &body body) `(make-instance 'tab :fm-parent *parent* ,@inits :kids (c? (the-kids ,@body)))) (defmethod make-tk-instance ((self tab)) (tk-format `(:make-tk ,self) "frame ~a" (^path))) ;--- example usage --------------------------------------------------- (defmd nb-test (window) (kids (c? (the-kids (mk-notebook :width 100 :kids (c? (the-kids (mk-tab (:text "first") (mk-stack ("tab with container") (mk-label :text "hi"))) (mk-tab (:text "second") (mk-label :text "a") (mk-label :text "b"))))))))) (defun test-nb () (test-window 'nb-test)) -- ---- Andy Chambers Formedix Ltd

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Re: [cells-devel] celtk notebook widget
by Kenny Tilton 16 Jun '08

16 Jun '08

Peter Hildebrandt wrote: > Still I remember you changing the way without-c-dependency worked -- > it might be that this was for debugging purposes or as a future > extension, tho. It was actually a Fundamental Repair. I had overloaded the compute stack with the responsibility of conveying dependency. Sounds reasonable until one decides to go without dependency but of course still does not want to get into an infinite cycle computing values. So I created a new special variable to represent the "depender", which one could bind to nil to avoid dependencies while still binding oneself onto the *call-stack* to support cycle detection. > I believe (!) you changed it from setfing to > dynamically binding ... Me? setf a special?! :) > well, all that is buried deep down there > beneath a ton of thesis work ;-) > >>> Andy, if you could send us a more detailed description of the problem, >>> that might help trigger our recollection from the cells-gtk3 >>> migration. >> I think a runtime error from Cells complaining about a cycle that goes away >> when reverting to older Cells would be a smoking gun. :) > > As a matter of fact, that's what I had in mind. > > Btw, Chris Smith got back to me concerning the doc work and we mailed > a couple times to and fro. He's now working on putting together a > good (!) getting started for cells-gtk3 and maybe smoothen out the > install process a bit. (I should apologize that I lured him over here > into the cells-gtk camp, again leaving celtk and cello without a doc. Just as well, I haven't much time to spare these days. > Maybe one day Frank will take it on ...) > > Is that algebra software coming along? I remember you talking about a > closed-user-group alpha a while ago on cll, but haven't heard anything > since. Maybe I should go back and join that yahoo group (I believe it > was). Going good, so well I got a little greedy and went for another milestone before releasing. Wait for an announcement, it will be a new/different group (the name is kinda taken by other Algebra stuff). Thx for the interest. kt

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[cells-devel] [SPAM] FIM DO DRAMA.
by FIM＠common-lisp.net 13 Jun '08

13 Jun '08

Spam detection software, running on the system "clnet", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: FIM DO DRAMA, CASO ISABELLA NARDONI CHEGOU AO FIM! Alexandre Nardoni confessa que a sua esposa Ana Carolina a madastra de Isabella foi a autora do crime de Isabella. [...] Content analysis details: (9.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 1.6 FROM_HAS_MIXED_NUMS3 From: contains numbers mixed in with letters 1.7 MSGID_FROM_MTA_ID Message-Id for external message added locally 0.7 SUBJ_ALL_CAPS Subject is all capitals 1.2 FORGED_HOTMAIL_RCVD2 hotmail.com 'From' address, but no 'Received:' 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.4991] 0.2 MIME_HTML_ONLY BODY: Message only has text/html MIME parts 0.6 FORGED_OUTLOOK_HTML Outlook can't send HTML message only 0.0 UPPERCASE_25_50 message body is 25-50% uppercase 0.0 MISSING_MIMEOLE Message has X-MSMail-Priority, but no X-MimeOLE 3.9 FORGED_MUA_OUTLOOK Forged mail pretending to be from MS Outlook The original message was not completely plain text, and may be unsafe to open with some email clients; in particular, it may contain a virus, or confirm that your address can receive spam. If you wish to view it, it may be safer to save it to a file and open it with an editor.

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[cells-devel] Reentrant Cell ?
by Ingo Bormuth 12 Jun '08

12 Jun '08

Hi everybody, can a cell somehow ask to be evaluated in the future? I have a cells-gtk application. Some calculation take quite a time which makes the gui quite unresponsive. I'd like to have pseudoparallelism within the cell layer. One hack I thought about is to introduce a timer-cell that is updated from within gtk's main loop. A c-sleep function would explicitly request those updates. Taken together this would make for a tiny scheduler. Every comment is appreciated. Thanks in advance. Ingo. ______________________________________________________________ Jeden Monat 1 hochkarätiger maxdome-Blockbuster GRATIS! Exklusiv für alle WEB.DE Nutzer. http://www.blockbuster.web.de

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Re: [cells-devel] Triple cells
by Ken Tilton 12 Jun '08

12 Jun '08

Watt Poosanguansit wrote: >>should we >>forget CLOS and start working on a dynamic object >>model tailored after RDF? >> > > > I think I am sold on RDF. It looks like it provides a > lot of features and more that datawarehousing is > providing but with alot less weight. However, I am > still learning to see if it can be simpler to use it. > If you come up with a general way to do the dynamic > objects, I hope you would blog about it. I just don't think it will be objects (and I used that word myself above by mistake). I think we are now just writing out information, adding little branches and subbranches of detail as the information demands, rather than forever shoehorning the data into shapes dictated by relational design or even CLOS. But, yes, there is a whole new representational language to be developed so things will be simpler. It is easy enough to build up the RDF structure adding new information willy-nilly as it comes up during application development--what gets interesting is then /reading/ that information. My GUI work offers encouraging news on the read side. One of the things I did up front was not make inter-object reference brittle as would happen if one was always looking "exactly here" for the widget that decided, say, the enabled status of another widget. My solution at first was search by name, and here duplicates were OK as long as the first one I got to in an orderly search widening from myself got to the one related to me first. Since duplicates would arise from repeating clusters and since the dup related to me would be in the same cluster this Just Worked. Later I found myself doing more searching up and down for things of a certain type, and again propinquity was a sure guide to relevance. I expect we will likely get lucky in the same way reading unstructured webs of RDF data. > > >>If you want to allow the sixth B and raise an error, >>you would have an >>"errors" rule on A that simply says: >> >> (when (> (length (^A)) 5) (make-instance >>'too-many-b)) >> >>If you want to prevent the sixth B from getting in, >>you would have to >>stop it via some add-b-to-a function that checks >>first of the maximum >>has been reached, ie, the old-fashioned way and not >>using Cells. >> > > I was thinking of something more complex. I think I > kinda get it now. Mind you you could automate some of the validation by having cells precompute certain conditions such as "I am maxxed out on Bs", such that the add-b-to-a function just says: (if (maxxed-out...) (error) (write)) In certain cases that would be overkill, but in others where the condition (in this case maxxed-out) is more interesting, it would help having that logic encapsulated in its own "slot" of information. > > >>I am afraid I am incredibly busy these days and >>won't have time for more >>than an occasional email. :( > > > I really appreciate you help. No, problem. Don't hesitate to ask, I can always beg off if something looks too involved. cheers, kenny

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[cells-devel] Triple cells
by Watt Poosanguansit 12 Jun '08

12 Jun '08

Hi Ken, I have got a hold of your slides at the European Common Lisp Meeting. I also looked through Triple Cell code and I still do not know how to really use the code. A few questions I have to start off. It looks to me like the code stores only the slots and not the whole Clos object. Is that the case? If yes, how do I persist the whole Clos cell object? Also, if I have a cell object that is the composite of other cell objects - Document A has a number of Document B. I want to state a rule saying A can not have more than 5 B associated with it. How to simply state that in Clos and Cell? I am sorry for the newbie type questions. I hope you can include more samples code so it will be easier for new comers to follow. Thanks for your help. Watt P.

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[cells-devel] trc strangeness
by Andy Chambers 12 Jun '08

12 Jun '08

Hi All, I've just come across some unintuitive behavior in trc that maybe you're interested in. I was writing the following unit-test for openair and the (check (search "status" ...) was failing, even though the trc just above it showed that "status" was clearly in the output. Turns out, when you just (princ (update chkbx)), the value that appears is "STATUS" (which is what I should have been testing for anyway). It was just baffling though to have trc tell me that the strings should match, but when the test actually runs, they don't. I think this is because I still don't understand properly how print and friends work. (deftest test-updates () (cells-reset) (princ #\Newline) (let* ((app (mk-web-app (:prefix "/app") (make-instance 'md-name-test :fm-parent *parent*))) (page (car (resource app))) (chkbx (fm-other :status :starting page))) (declare (ignorable app page chkbx)) (check (search "value='off'" (xhtml chkbx))) (add-post app "STATUS" "on") (check (search "value='on'" (xhtml chkbx))) (trc "upd" (update chkbx)) (check (search "status" (update chkbx))) (check (search "value=\\'on\\'" (update chkbx))))) -- Andy

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[cells-devel] Where is each project?
by Stu Glaser 12 Jun '08

12 Jun '08

It's not the lack of documentation. I don't even know where to start. Where is the main web page for each of cells, celtk, cello, and cells-gtk? Where are the source code repositories for each? Is there a central location for the tidbits of documentation that exist? Also, what's the status of each. Actively developed, "finished", or left to rot? KT, which are you working on the most? Thanks, -Stu P.S. It would be real nice to have a canonical git repository for each on github or gitorious.

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cells-devel June 2008