Squeak-dev August 2007

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132 participants
163 discussions

[ANN] Smagick
by stefan_reichhart＠students.unibe.ch 28 Aug '07

28 Aug '07

Hi all, "Smagick" is a small high level interface to control "Image Magick" from within a Smalltalk environment, eg. Squeak. The purpose of this package is to provide high performance image manipulations without the need to know all the low level details of image processing. A possible use case could be a web application providing image up/ download or even manipulation (for example thumbnailing, resizing, recompression) to multiple users ... What can "Smagick" do right now: - it can read all internal image properties (examples: width, height, colorspace, encoder, quality, bounding-box, ......) - it can read most exif information (examples: camera software, date, orientation, shutter-speed, .....) - it can convert any image format* to any other format* - it can apply various image transformations concerning quality, colors, effects, orientation, size, metas (examples: resize, charcoal, emboss, colorspace, exif-auto-orientation, .....) - it can compose [work in progress] multiple images (examples: multiply, difference, add, ......) * depends on your "Image Magick" installation I attached some more information about getting, installing and using "Smagick" at the bottom of this mail ... I will add more features and try to make the interface more simple and robust ... in the meantime I'm looking forward to some feedback Cheers, Stef -------------------------------------------- GETTING "Smagick" "Smagick" depends on - OSProcess (+ UnixVM) You can get "Smagick" from - "http://www.squeaksource.com/SqueakAddOns" It will load all dependencies (except OSProcess) -------------------------------------------- INSTALLING "Smagick" If you have "OmniBrowser" installed, execute the following after loading "Smagick" SmagickEnvironment setup This will ask you for the installation path of "Image Magick", providing an example of how this could look like ;). Furthermore it will check whether "Image Magick" really exists in the given location. If you don't have Omnibrowser installed, use SmagickEnvironment setupSilent: 'your installation path' This will set the path but not perform a check. -------------------------------------------- SOME SIMPLE EXAMPLES OF USING "Smagick" " this will apply some transformations on aFile.JPG and then save it to anotherFile.PNG " " NOTICE: the order of transformations is relevant !!! " (SmagickImage on: 'aFile.jpg') convertTo: 'anotherFile.png' with: [ :image | image sharpen: 20; negate; autoOriented; polaroid; colors: 256; quality: 20 ] " this will negate the cyan color channel only and then save aFile.JPG to anotherFile.PNG " (SmagickImage on: 'aFile.jpg') convertTo: 'anotherFile.png' with: [ :image | image image with: SmagickConstants cyan do: [ :channel | channel negate ] ] " get the compression ratio of aFile.JPG " (SmagickImage on: 'aFile.jpg') compressionQuality inspect

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RE: directory recursive delete problem on Windows
by Andrew Tween 28 Aug '07

28 Aug '07

I should have mentioned that SHFileOperation will remove a folder AND its contents in one operation. There is no need to delete the folder's contents first. Also, when setting the folders files to not read-only; this is done RECURSIVELY. i.e. the folder's files, + the folder's child folders' files, + the folder's folders' folders' files etc.. Depending on the flags used, this operation may NOT put the deleted folder into the recycle bin. So beware, it can instantly remove a large chunk of your disk if you get the folder path wrong ! Cheers, Andy From: amtween(a)hotmail.comTo: squeak-dev(a)lists.squeakfoundation.orgDate: Tue, 28 Aug 2007 20:28:01 +0100Subject: RE: directory recursive delete problem on Windows I have also seen this problem on Windows.>From what I remember, disabling the windows indexing service + any virus checkers + Google desktop search, made it happen less often :) Also, it was more likely to occur when an explorer, viewing the folders contents, was open.And, from what I recall, it was made worse if the folder contained a .thumbs file and so it happened more often on XP than on Win2000. In the end we solved the problem by using the Shell.dll function - SHFileOperation - with the FO_DELETE , FOF_NOERRORUI, FOF_SILENT, FOF_NOCONFIRMATION flags; to do the folder delete. We also removed any read only, archive, flags from the files in the folder before calling the function). You could probably use FFI to call the function, or else make a plugin.Cheers,Andy. > Date: Tue, 28 Aug 2007 19:20:54 +0200> From: michael(a)impara.de> To: squeak-dev(a)lists.squeakfoundation.org> Subject: directory recursive delete problem on Windows> > Hi all,> > Grit just ran into an -interesting to say the least- problem with > recursive deletion of directories on Windows. We are not able to provide > a stripped down test case yet, but here some info:> > - we extract a zip archive to provide an initial setup for Plopp data> - then the user can play around in demo mode (problem doesn't occur in a > full version as the deletion doesn't take place)> - upon quitting demo mode all data is erased via a recursive directory > delete> > > We have simple test up without running the UI to reproduce the problem.> > The delete fails about 1 in 10 with a primitive failed in deleteDirectory.> > There are no open files or anything obvious.> > Now the interesting part...> If we add a delay of 1 sec after catching the error and then simply > retry the exception to delete the directory again, it works.> > [Painter3DStorage storageDirectory recursiveDelete]> on: Error> do: [: exception |> (Delay forMilliseconds: 1000) wait.> exeption retry]> > Any ideas?> > Michael> > > Email straight to your blog, upload jokes, photos and more. Windows Live Spaces, it's FREE! _________________________________________________________________ Try Live.com - your fast, personalised homepage with all the things you care about in one place. http://www.live.com/?mkt=en-gb

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RE: directory recursive delete problem on Windows
by Andrew Tween 28 Aug '07

28 Aug '07

I have also seen this problem on Windows. >From what I remember, disabling the windows indexing service + any virus checkers + Google desktop search, made it happen less often :) Also, it was more likely to occur when an explorer, viewing the folders contents, was open. And, from what I recall, it was made worse if the folder contained a .thumbs file and so it happened more often on XP than on Win2000. In the end we solved the problem by using the Shell.dll function - SHFileOperation - with the FO_DELETE , FOF_NOERRORUI, FOF_SILENT, FOF_NOCONFIRMATION flags; to do the folder delete. We also removed any read only, archive, flags from the files in the folder before calling the function). You could probably use FFI to call the function, or else make a plugin. Cheers, Andy. > Date: Tue, 28 Aug 2007 19:20:54 +0200> From: michael(a)impara.de> To: squeak-dev(a)lists.squeakfoundation.org> Subject: directory recursive delete problem on Windows> > Hi all,> > Grit just ran into an -interesting to say the least- problem with > recursive deletion of directories on Windows. We are not able to provide > a stripped down test case yet, but here some info:> > - we extract a zip archive to provide an initial setup for Plopp data> - then the user can play around in demo mode (problem doesn't occur in a > full version as the deletion doesn't take place)> - upon quitting demo mode all data is erased via a recursive directory > delete> > > We have simple test up without running the UI to reproduce the problem.> > The delete fails about 1 in 10 with a primitive failed in deleteDirectory.> > There are no open files or anything obvious.> > Now the interesting part...> If we add a delay of 1 sec after catching the error and then simply > retry the exception to delete the directory again, it works.> > [Painter3DStorage storageDirectory recursiveDelete]> on: Error> do: [: exception |> (Delay forMilliseconds: 1000) wait.> exeption retry]> > Any ideas?> > Michael> > > _________________________________________________________________ Feel like a local wherever you go with BackOfMyHand.com http://www.backofmyhand.com

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ESUG 2007 media
by Noury Bouraqadi 28 Aug '07

28 Aug '07

Dear Smalltalkers, The ESUG 2007 Smalltalk Conference is currently running. You can have some news, pictures and pdfs of presentations at: http://csl.ensm-douai.fr/Esug2007Media Noury ------------------------------------------------------------------ Dr. Noury Bouraqadi - Enseignant/Chercheur Responsable de l'enseignement de l'informatique ARMINES - Ecole des Mines de Douai - Dept. I.A. http://csl.ensm-douai.fr/noury European Smalltalk Users Group Board http://www.esug.org ------------------------------------------------------------------

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Re: pipe
by Denis Kudriashov 28 Aug '07

28 Aug '07

2007/8/27, Alan Lovejoy <squeak-dev.sourcery(a)forum-mail.net>: > > Denis Kudriashov wrote: > > Smalltalk is wonderfull language. We can implement any ideas without > > making changes in language (as Java or C# live). > > I think pipes is very usefull in DSL implementation and usage, simpler > > and fast object inspecting. But long message chaines in domain code > > are bad smell > > There haven't been all that many syntax changes to Smalltalk since its > public release as ST80. Off the top of my head, I can list the following: > > These changes does not have an influence on language core, language semantics. Its just was some convenient constructions for building special objects. But when we put in Smalltalk new operator we change it semantics. Why we must do it? Bert implemented it in clean Smalltalk without any language changes. Why it is not enough? Best regards, Denis

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Re: Squeak-dev image: no MP3 drops to World accepted
by Jerome Peace 28 Aug '07

28 Aug '07

Squeak-dev image: no MP3 drops to World accepted Hi brad in squeak 7137 (basic not dev) Ive noticed that dropping projects on to the window sometimes will load the project and sometimes not. It seems very related to where I drop things. So I dont think the problem is specific to MP3 files. It seems to me a mantis report is in order. Want to start one? Yours in curiosity and service, --Jerome Peace *** >Brad Fuller bradallenfuller at yahoo.com >Mon Aug 27 22:43:18 UTC 2007 > > >On Mon August 27 2007, Brad Fuller wrote: >> Hi Damien, >> >> Running on my Linux (gentoo) system, sq3.9-7067dev07.08.1 does not accept >> mp3 drops to the World. The result is: nothing happens. How come? >> On the standard 3.9-7067 system, dropping an MP3 file on the World results >> in a player to play the mp3 file. > >I take that back. Sometimes it works sometimes it doesn't. Don't know why >though. > >> >> brad >> >> BTW: not all MP3 files are accepted on the World as a dropped file. Does >> anyone know why? I haven't dug at all into it, so I'm assuming it has to do >> with the limitations of the mp3 decoder. Anyone enlighten me? >> >> brad *** ____________________________________________________________________________________ Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545469

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Error updating universe list
by Torsten Bergmann 28 Aug '07

28 Aug '07

Giuseppe wrote: >I'm getting this error updating universe from network from different >images. Looks like "Seaside-HTML5-beta version 2.8.411.5" (http://www.squeaksource.com/Seaside/HTML5-pmm.5.mcz) was added with a conflict - but the package defined in the conflict is empty: <package> <name>Seaside-HTML5-beta</name> <version>2.8.411.5</version> <category>Web Development beta</category> <description>HTML5 support moved out of Seaside2.8</description> <url>http://www.squeaksource.com/Seaside/HTML5-pmm.5.mcz</url> <homepage>http://www.seaside.st/</homepage> <maintainer>keith_hodges(a)yahoo.co.uk</maintainer> <provides></provides> <depends> <packagename>Seaside-beta</packagename></depends> <conflicts> <packagename></packagename></conflicts></package> -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser

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Re: Pipe syntax and the current methods
by Bert Freudenberg 28 Aug '07

28 Aug '07

On Aug 27, 2007, at 16:08 , Alan Lovejoy wrote: > Blake wrote: >> b := a msg. >> b msg1. >> b msg2. >> >> Do I misunderstand? (And at what point does the potential for >> confusion and ambiguity outweigh the feature?) >> > Yes. > > The message sent to a is #asPipe, not msg: > > p := a asPipe. > p msg. > p msg1. > p msg2 > > Or alternatively: > > a asPipe > msg; > msg1; > msg2 > > The Pipe arranges for each message to be sent to the right object. and it does so by retaining the previous value inside the Pipe object, so this is equivalent to p := a asPipe. "p value: a" p msg. "p value: p value msg" p msg1. "p value: p value msg1" p msg2. "p value: p value msg2" >> (And at what point does the potential for confusion and >> ambiguity outweigh the feature?) At the point where this code would leave my machine ... as I said, I'd not use that in production. In that sense, adding new syntax actually provides clarity. Which reminds me - actually spelling this out using a running value is what I would use in production: val := a. val := val msg. val := val msg1. val := val msg2. ^val I use this code pattern sometimes. You couldn't do this in a statically typed language, but in Smalltalk - Bert -

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Squeak-dev image: no MP3 drops to World accepted
by Brad Fuller 28 Aug '07

28 Aug '07

Hi Damien, Running on my Linux (gentoo) system, sq3.9-7067dev07.08.1 does not accept mp3 drops to the World. The result is: nothing happens. How come? On the standard 3.9-7067 system, dropping an MP3 file on the World results in a player to play the mp3 file. brad BTW: not all MP3 files are accepted on the World as a dropped file. Does anyone know why? I haven't dug at all into it, so I'm assuming it has to do with the limitations of the mp3 decoder. Anyone enlighten me? brad

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Re: pipe
by Jason Johnson 27 Aug '07

27 Aug '07

On 8/27/07, Alan Lovejoy <squeak-dev.sourcery(a)forum-mail.net> wrote: > > How often would it be used in practice? Would most uses be valid, or > would most have to be considered as suboptimal code? That's the question. I have no idea. In all the code I have written so far, the only place it would have come up would have been in the LazyList implementation I did (probably at most 5 methods of it), which was inherently functional. But in that case I'm not sure that I still wouldn't go with the parenthesis. > Would it attract a significant body of functional programmers to Smalltalk? I don't know if that would be bad, though I don't know how much of a worry/hope it would be. It's not only Smalltalk that seems to be generating interest, but high level languages in general. The Lisp list seems to be growing, Haskell is growing. Erlang is about to explode, some think it will be the next Java (in popularity, not with overly verbose syntax).

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