cells-devel

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567 discussions

[cells-devel] How would you like unlimited hits to your website 15 minutes from now ?
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05 Mar '07

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[cells-devel] Post your ads where people read them!!!
by Feed＠common-lisp.net 01 Mar '07

01 Mar '07

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[cells-devel] Get 1000's of Highly Targeted visitors to your web site or affiliate web site overnight
by Instant＠common-lisp.net 27 Feb '07

27 Feb '07

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[cells-devel] How would you like 2 Million Sites linking to your ad ?
by BlogBlaster＠common-lisp.net 24 Feb '07

24 Feb '07

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[cells-devel] cells and cells-gtk
by Peter Denno 21 Feb '07

21 Feb '07

Hi ken, It has been a while (2006-06-07 to be exact) since I have updated the cells code in cells-gtk. Is there something in this new version, cells3, that would make an upgrade worthwhile? Bug fixes? -- Best regards, - Peter

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[Fwd: Re: [cells-devel] Cells and Threads]
by Ken Tilton 21 Feb '07

21 Feb '07

Duane Searsmith wrote: > Hi -- > > Quick question. I skimmed through the archives and didn't see any > obvious answer to this question. Is cells thread safe? If not, is > there a particular pattern of use that one can follow to avoid > problems in a multiprocess scenario? > > I have an application that is multithreaded and I would like to > explore how to use cells to drive the dataflow. I've read through the > examples and looked over the code a bit. Seems like I could get in > trouble if multiple threads tried to change a cell with dependencies > at the same time. > > If this is a silly question and I have missed some obvious explanation > somewhere, please just point me in the right direction. Not at all, good question, I have been waiting for it. :) I am afraid I have never programmed a threaded application, so I do not know what to say. Can threads enqueue on some resource (in the case of Cells, that would be the "data pulse", just a sequential counter of state changes that drives data integrity)? That would do the trick (I think!), but then does that defeat the whole point of threads? If each thread operates on a discrete subset of the application universe, well, I /did/ start to mess with allowing such a beast to have its own pulse -- then we just have to figure out the boundary (assuming one wants at least /some/ dependency to reach thru the wormhole, if you will). Hmmm, I guess if you are worried about two threads setting the same input cell then clearly they can enqueue on some resource. I guess the next problem is if you want to have the Cells engine itself running in multiple threads, which could be tough. And in /my/ Cells apps, Cells tend to ineluctably take over the whole application, so if Cells runs in one thread only then again -- well, like I said, I have never programmed with threads. I guess I will leave the implications to you. Any help? ken

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[cells-devel] Cells and Threads
by Duane Searsmith 20 Feb '07

20 Feb '07

Hi -- Quick question. I skimmed through the archives and didn't see any obvious answer to this question. Is cells thread safe? If not, is there a particular pattern of use that one can follow to avoid problems in a multiprocess scenario? I have an application that is multithreaded and I would like to explore how to use cells to drive the dataflow. I've read through the examples and looked over the code a bit. Seems like I could get in trouble if multiple threads tried to change a cell with dependencies at the same time. If this is a silly question and I have missed some obvious explanation somewhere, please just point me in the right direction. Thanks, -- Duane

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[cells-devel] Bank of America Corporation Update
by Bank of America Corporation 28 Jan '07

28 Jan '07

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[cells-devel] Celtk: Separating placing from instantiation of widgets
by Frank Goenninger 09 Jan '07

09 Jan '07

Dear Celtikers: (or how do we call Celtk users ;-) In the quest of generating a dynamic GUI for my sweet little app I encountered the need to separate widget instance creation from making them actually appear... Celtk does handle widget appearance as a side effekt of creating an instance - at least I understand the Celtk mechanism as such. Now there's a couple of solutions of that I can imagine - each requiring a change to deeper Celtk mechanisms like adding a new slot "visiblep" to the widget class and then preventing placing, packing, and/or gridding when that slot is nil ... Too much low level stuff - I wonder if there's another solution ?! I have: (defmodel tibrv-console (window) ((active-workarea :accessor active-workarea :initform (c-in nil) :initarg :active-workarea) (workareas :accessor workareas :initform (c-in nil) :initarg :workareas)) (:default-initargs :id :tibrv-console :title$ (conc$ "*** G&C::TIBCO Rendezvous Console - " *tibrv- console-version* " ***") :width (c-in 800) :height (c-in 605) :workareas (c? (the-kids (make-kid 'msg-workarea) ;; These two families should not (make-kid 'listener- workarea))) ;; appear upon creation :kids (c? (the-kids (main-menubar) (application-view self) (header-view self) (tool-header-view self) )))) (defmodel workarea (tibrv-model ctk::frame) ((visiblep :accessor visiblep :initform (c- in :unplaced) :initarg :visiblep) (title :accessor title :initform (c-in nil) :initarg :title) (required-field-color :accessor required-field-color :initform (c-in nil) :initarg :required-field-color)) (:default-initargs :id (gensym "WORKAREA-") :required-field-color (c-in "#f0d5da"))) (defobserver visiblep ((self workarea)) (if (or (not new-value) (eql new-value :unplaced)) (hide self) (unhide self))) (defmethod hide (self) (when self (dolist (kid (kids self)) (when kid (hide kid))) (when (eql (type-of self) 'ctk::widget) (tk-format '(:fini self) "place forget ~a" (path self))) (tk-format '(:fini self) "update idletasks"))) (defmethod unhide (self) (when (and self (eql (type-of self) 'ctk::widget)) (tk-format '(:fini self) "place configure ~a -x ~a -y ~a" (^path) (ctk::^parent-x) (ctk::^parent-y)) (dolist (kid (kids self)) (when kid (unhide kid))) (tk-format '(:fini self) "update idletasks"))) Hiding and unhiding works OK when called directly for a workarea object.. So that part is solved already... Any ideas really appreciated. Frank

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[cells-devel] Celtk: background not getting set/sent for entry widget
by Frank Goenninger 06 Jan '07

06 Jan '07

Me again - Hi! When creating an entry widget as (mk-entry :id :data-entry :width 40 :parent-x 65 :parent-y 115 :background (c_? (required-field-color (fm-parent self)))) where the background depends on the value of the parent's required- field-color slot I never get any background color set. No, the dependency does not cause this - I get the same effect when directly specifying a color ... I then tried to narrow this down and found out that Celtk never passes the background option to Tk via tk-format-now... Any help appreciated ... (Yes, ahem, I know that this lies somewhere in the deftk macro, Kenny .. Or am I wrong here? ;-) Thx! Frank

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