Squeak-dev April 2007

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151 participants
201 discussions

[ANN] Nile: a trait-based stream library
by Damien Cassou 03 May '07

03 May '07

Hi, I have just released a first version of the Nile Stream hierarchy. This is a complete reimplementation of the squeak stream hierarchy. It provides: - traits for code reuse. I'm currently implementing new clients to test the granularity ; there are currently two clients: Random and History. - lots of tests: same tests are used for the squeak stream hierarchy and Nile (they are implemented in traits). 292 run, 2 expected failures for the squeak stream hierarchy. If you don't have this results, please tell me. - a diagram of the implementation: http://damien.cassou.free.fr/documents/internship_2007/nile/complete_hierar… You can load Nile using: MCHttpRepository location: 'http://www.squeaksource.com/Nile' user: '' password: '' Load Nile-Tests to get Nile and all associated tests. You can also load Nile-All to have only Nile without the tests. If loading Nile-Tests asks you about loading an older dependency of Tests, you *must* agree. This is because it seems there is a problem with this package in last Squeak 3.10 alpha versions. Do you have some clients which will be worth implementing with the traits Nile provides? Please tell me. -- Damien Cassou

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Omnibrowser and scrolling on left
by Martial Boniou 03 May '07

03 May '07

Hi, I am working with the latest dev-beta images from Damien Cassou. It worked great until the last upgrades (from 107 to 116/118). I found the latest omnibrowser is not compatible with my image look'n feel. As I was a NeXT user, I do like to use the native scrolling/scrollBarsOnRight inactive preference (so I have the scrollbars on the left) and with this option PackageUniverse, PierBrowser... don't work (the upper columns have disappeared). So the only way to use (especially for the new UniversesBrowser) is to display scrollbar on the right (so unnatural for me hopefully I've got a mousewheel). I hope avi knows that (it looks like there are a lot of changes in the core of Omnibrowser). Regards, Martial Boniou

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Harvesting Float Interval - questionable feature
by nicolas cellier 02 May '07

02 May '07

Playing with Interval, here is a report and some questions about a special feature INTRODUCTION: ------------ Interval on Float are messy. #do: loops are not consistent with #size nor #at: because of accumulated round off errors. This is because inside the do loop we write aValue := aValue + step And stop the loop when we reach stop Things are better if we make things compatible with #at: (index is 0-based) aValue := start + (index * step) And stop after self size iterations to be compatible with #size All this is at http://bugs.squeak.org/view.php?id=6456 It has the advantage of also solving #reverseDo: http://bugs.squeak.org/view.php?id=6438. Another related stuff is the way we test for inclusion. Current implementation try to test inclusion with a fuzzy tolerance. Unfortunately, it is completely broken and have incorrect patch at http://bugs.squeak.org/view.php?id=1602 for speeding up indexOf: as noted by german morales, and better patch by boris gartner at http://bugs.squeak.org/view.php?id=1603 for correcting both includes: and indexOf: The patch is however incomplete because it handles only approximate by excess, not by default as shown in http://bugs.squeak.org/view.php?id=6455. QUESTION: -------- But why do we test for Float inclusion with fuzzy tolerance in Interval and not in other collections? And why a fixed tolerance? (1.0e-10 relative to step in original, 1.0e-8 in some correction). I would tend to implement exactly same behaviour as super and eventually implement a includes:withTolerance: if needed, in all Collection (though this is as simple as #detect:, it might be accelerated in Interval if there is a dedicated selector). My feeling is that previous implementation of do: and unconsistency with at: might have motivated the fuzzy test. But is there another reason to make Interval behave differently from super? I tend to be cautious now, because when i tried to correct first and last that incorrectly handle empty Interval (http://bugs.squeak.org/view.php?id=6454), it did break the image. Text selection rely on this behaviour and that is more than 10 messages to patch. What is your opinion about the fuzzy inclusion?

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[ANN] Kernel Image - independent MinimalMorphic and better granularity
by Pavel Krivanek 02 May '07

02 May '07

Hi all, I have prepared the new version of the KernelImage. The most important new is the independence of the MinimalMorphic package. That means that MinimalMorphic package has no overrides now and we are be able to modify and publish Kernel and basic primitive packages directly from the MinimalMorphic image! I have to say that some of the secessary refactorings are very ugly now but the main goal was to make the MinimalMorphic independent soon and enable to develop the kernel refactorings in more comfortable way. The test and some other small packages were removed from the EToys package. The next step should be improvement and splitting of tests. The complete image has 20 failures and 3 errors now. The EToys package has still many overrides. All packages should include 3.10 patches up to 7091. ImagePack 20070428 - download: http://comtalk.net/public/pub/KernelImage/ImagePack20070428.zip Includes: - KernelImage (basic kernel without network and the other primitive packages) - KernelImageMC (basic kernel with network and Monticello) - MinimalMorphic image - EToys image Cheers, -- Pavel

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[ANN][Squeak-dev Image] Version 118
by Damien Cassou 02 May '07

02 May '07

Squeak-dev image is an image made for squeak developers. *Important notice:* This version is based on Squeak 3.9 7067. You can download it here: http://damien.cassou.free.fr/squeak-dev/ Changes in this version: ------------------------------ - Based on Squeak 3.9 7067. - The documentation now contains all installed packages. - The new Universe Browser based on OmniBrowser replaces the previous one. - Lot's of other packages have been updated too. Updating the image: ------------------------- You are not obliged to download a new image if you don't want. You can always update your image. To upgrade your already existing squeak-dev image: 1) World menu->open...->Package Universe Browser 2) Update list from network 3) Select all upgrades 4) Install selection 5) Execute: 'DEVImageCreator default install' (all windows will be closed) Prepared packages: -------------------------- There are a lot of packages prepared for you in this image. They are not loaded in the image, but they can be easily. - Open Package Universe Browser (world->open...->Package Universe Browser). - Click on "Update list from network" - Wait a few seconds - Select your packages - Install them Future work: ---------------- - Wait for feedback. - Follow Squeak 3.10 beta releases. - Think about a new way of naming the image version. This is because currently, the version is based on the Monticello repository version. However, the big updates/changes now happen in the universe directly and I don't have to touch the source code anymore. Please tell me what is your experience with this version. Please tell me what you want for this image, this is for you. -- Damien Cassou

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Date classes
by J J 02 May '07

02 May '07

Hi all, I am doing some stuff with dates and I noticed the date classes that come with the default Squeak image are very nice and very close to having everything I would want. But there are a few inconsistencies here and there, and things missing that would make things easier. So what is the procedure to updating this? I think it's part of the core system so I probably can't just do a monicello package update somewhere? Do I have to do it through mantis? Thanks, Jason _________________________________________________________________ Download Messenger. Join the im Initiative. Help make a difference today. http://im.live.com/messenger/im/home/?source=TAGHM_APR07

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Any reason for assigning block parameter in inject:into:
by Stéphane Ducasse 02 May '07

02 May '07

Hi I would like to know if there are any reason (except in imageSegment) to assign to inject:into: parameter. we saw String asPacket asPacked ^ self inject: 0 into: [:t1 :t2 | t1 := t1 * 256 + t2 asInteger] The assignment is not needed since the semantics of into: is to do that exactly

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Another stupid Morphic Question
by Andrew P. Black 02 May '07

02 May '07

In my continuing quest to make sense of Morphic, I've run up against the following situation. I have a RectangleMorph (subclass). Embedded in it are a number of CircleMorph (again, actually a subclass) connected by NCAAConnectorMorphs. I want to be able to move the circles by dragging them with the red button. This is exactly the default behavior when they are in the World — but when they are in the RectagleMorph, a mouse click picks up the whole rectangle. I have tried making handleMouseDown: answer false in the RectangleMorph, and to answer true in the circles — this doesn't help. Conversely, I _don't_ want to be able to pick up the Rectangle with a single red click. But I can, and I can't turn this off, even though handlesMouseDown: and handlesMouseStillDown: answer false. This should be trivial, shouldn't it? Andrew ________________________________________________ The Morphic tarpit: where everything is possible ... but nothing is easy

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The Weekly Juan #10: "Cheap, High Quality Fonts in Squeak"
by Juan Vuletich 01 May '07

01 May '07

Hi Folks, The Weekly Juan #10 is out at http://www.jvuletich.org/issues/Issue0010.htm . I managed to get antialiased subpixel rendered fonts in Squeak without modifying any plugin, just with a 13kb change set. Hope you like it. Any comment is welcome. Cheers, Juan Vuletich

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converting arrow to ':=' for assignment in squeak 3.9
by Ralph Boland 01 May '07

01 May '07

I am currently converting my squeak project from Squeak 3.8 to Squeak 3.9. (Thanks by the way to the people who helped me installSqueak 3.9 in Linux. Note that commands 'man squeak' and 'man inisqueak' still reports the existence of a command 'inisqueak' even though the command is not to be found.) My understanding was that as of 3.9 Squeak no longer supports use of the arrow for the assignment operator and that I must use ':='. :-( I thus expected that all my arrows would be converted to ':=' upon fileIn. But this doesn't happen. Upon investigation I found the the arrow operator still in use in the 3.9 code though it is now displayed as an underscore (which after all is what is is). Can someone explain to me clearly the status of the underscore character for Squeak 3.9 and beyond? Can someone explain to me how to convert my underscores to ':=' or must I write a sed script to do this? Note that I will use the arrow until I am forced to convert to ':='. Thanks Ralph Boland P.S. I am running Squeak3.9 on Ubuntu 6.10 Linux on a PC.

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