Squeak-dev July 2011

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61 participants
145 discussions

The Trunk: Tools-fbs.364.mcz
by commits＠source.squeak.org 08 Jul '11

08 Jul '11

Levente Uzonyi uploaded a new version of Tools to project The Trunk: http://source.squeak.org/trunk/Tools-fbs.364.mcz ==================== Summary ==================== Name: Tools-fbs.364 Author: fbs Time: 27 June 2011, 12:56:26.402 pm UUID: c881a91c-eaac-4a40-acfb-79fbe119558f Ancestors: Tools-fbs.363 Mantis #7648: when deselecting a class after a class-side method's been viewed, the selectedMessageName must be nil: you can't be viewing a method at this point! =============== Diff against Tools-fbs.363 =============== Item was changed: ----- Method: Browser>>selectClassNamed: (in category 'class list') ----- selectClassNamed: aSymbolOrString | className currentMessageCategoryName currentMessageName | + currentMessageCategoryName := [self selectedMessageCategoryName] on: Error do: [:ex| ex return: nil]. currentMessageName := [self selectedMessageName] on: Error do: [:ex| ex return: nil]. selectedClassName := aSymbolOrString ifNotNil: [ aSymbolOrString asSymbol ]. self setClassOrganizer. "Try to reselect the category and/or selector if the new class has them." selectedMessageCategoryName :=(self messageCategoryList includes: currentMessageCategoryName) ifTrue: [currentMessageCategoryName] ifFalse: [nil]. + selectedMessageName := (self messageList includes: currentMessageName) + ifTrue: [currentMessageName] + ifFalse: [nil]. - selectedMessageName := currentMessageName. self hasMessageSelected ifTrue: [self editSelection: #editMessage] ifFalse: [self hasMessageCategorySelected ifTrue: [self editSelection: #newMessage] ifFalse: [self classCommentIndicated ifTrue: [self editSelection: #editComment] ifFalse: [self editSelection: (self hasClassSelected not ifTrue: [(metaClassIndicated or: [ self hasSystemCategorySelected not ]) ifTrue: [#none] ifFalse: [#newClass]] ifFalse: [#editClass])]]]. contents := nil. self selectedClass isNil ifFalse: [className := self selectedClass name. (RecentClasses includes: className) ifTrue: [RecentClasses remove: className]. RecentClasses addFirst: className. RecentClasses size > 16 ifTrue: [RecentClasses removeLast]]. self changed: #classSelectionChanged. self changed: #classCommentText. self changed: #classListIndex. "update my selection" self changed: #messageCategoryList. self changed: #messageList. self changed: #relabel. self contentsChanged!

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The Trunk: ToolsTests-fbs.48.mcz
by commits＠source.squeak.org 08 Jul '11

08 Jul '11

Levente Uzonyi uploaded a new version of ToolsTests to project The Trunk: http://source.squeak.org/trunk/ToolsTests-fbs.48.mcz ==================== Summary ==================== Name: ToolsTests-fbs.48 Author: fbs Time: 27 June 2011, 12:51:07.632 pm UUID: 47511e5c-e42a-4f13-a270-fe4f6f64a38c Ancestors: ToolsTests-eem.47 Broken test: the commonSelector was not common within the commonCategory! =============== Diff against ToolsTests-eem.47 =============== Item was changed: ----- Method: BrowserTest>>testSelectClassNamedPreservesPlace (in category 'as yet unclassified') ----- testSelectClassNamedPreservesPlace | commonCategory commonSelector otherClass | browser selectSystemCategory: browser class category. otherClass := HierarchyBrowser. "Unlikely to move out of Browser's package!!" browser selectClassNamed: browser class name. commonCategory := (browser class organization categories intersection: otherClass organization categories) first. + commonSelector := #classList. - commonSelector := (otherClass organization allMethodSelectors intersection: browser class organization allMethodSelectors) first. browser selectMessageCategoryNamed: commonCategory. browser selectMessageNamed: commonSelector. browser selectClass: otherClass. self assert: browser selectedClassName = otherClass name. self assert: browser selectedMessageCategoryName = commonCategory. self assert: browser selectedMessageName = commonSelector.!

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What's going on with squeaksource?
by Casimiro de Almeida Barreto 08 Jul '11

08 Jul '11

Good evening all, Today is the 4th day that I'm not able to access http://www.squeaksource.com neither via browser (not that importat) nor via Monticello Browser (in order to install packages). I am able to connect to www.squeaksource.com at port 80 (http) but it seems that web server is died (no answer until timeout). Here I copy the output of a timed wget command: [casimiro@localhost Vuze Downloads]$ time wget http://www.squeaksource.com/VMMaker --2011-07-08 13:55:01-- http://www.squeaksource.com/VMMaker Resolvendo www.squeaksource.com... 130.92.65.106 Conectando-se a www.squeaksource.com|130.92.65.106|:80... conectado. A requisição HTTP foi enviada, aguardando resposta... 504 Gateway Time-out 2011-07-08 13:58:01 ERRO 504: Gateway Time-out. real 2m59.649s user 0m0.000s sys 0m0.005s [casimiro@localhost Vuze Downloads]$ I've consulted people at USP and they told me that there's no filter/firewall rule preventing traffic to/from squeaksource. Could someone from squeaksource.com administration help me with this issue? Best regards, CdAB

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full-screen mode - Linux
by Chris Muller 08 Jul '11

08 Jul '11

Does anyone like full-screen mode besides me? Years ago, when I used Windows, I would always run my Squeak images full-screen because there is something zen-like about being totally immersed into the image environment - it can be nicer experience than running with OS window and the start-bar cruft showing. But now I'm using Linux and, under that VM, full-screen mode does not allow any other windows to be displayed over full-screen Squeak. For example, I can't press Alt+Tab to bring my command-window to the top, it appears for a split second but then Squeak paints right back over it, but without keyboard focus! The only way to access any other program is to bring Squeak out of full-screen mode. Which is why the button to go full-screen was recently put to the upper-right corner - to facilitate the constant switching needed to be able to run full-screen. However, there is a danger with going full-screen. Cog is not very friendly to being interrupted - doing so often seems to lock the image - and this is a bad situation in full-screen mode since you can't get to any other windows to kill the process. The only option is a hard-power off - an ungraceful shutdown - losing all unsaved data in all applications - ouch! Would it be difficult for the Linux VM to behave similarly to the Windows VM w.r.t. full-screen mode? - Chris

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Dates should not be Timezone-specific (was: Should dates be tz-specific?)
by Chris Muller 08 Jul '11

08 Jul '11

I think of a DateAndTime as a Point-in-time, and a Date as an Interval in time. I think an argument can be made that, in the context of talking about an Interval of time defined by the calendar (e.g., Date or Month), the interval could be considered from the _World's_ frame-of-reference: as the timespan that _starts_ at midnight UTC and ends just before the next midnight UTC (of the next Date). This is the actual period for which March 31st, 2011 (for sake of example), existed for "the world". After that, there was no more March 31st for anyone. If we would accept this view then we could all have a consistent (and correct) notion of the exact interval of time a Date spanned. Besides that, applications which otherwise have no interest to be concerned about TimeZones can remain simple and elegant. When we talk about Date, we are talking about a Timespan with that "resolution" of 1 day, therefore forcing involvement a the shift of hours is unnecessary and ambiguous. For example, I have several data-feed that come in only with Date information (not timestamps). I have absolutely no need for timestamp but I certainly can be bitten hard if I gather the data-feed from a different time-zone. And this is a very hard bug to identify, because it just "silently changes your logic" rather than blowing up. Let's please consider this. Otherwise, please tell me a best-practice for my problem described above - I have data-streams coming in with simple Dates in them, and I need to compare those Dates to other Dates which might be instantiated in a different TimeZone.. - Chris On Wed, Jul 6, 2011 at 7:29 AM, David T. Lewis <lewis(a)mail.msen.com> wrote: > On Tue, Jul 05, 2011 at 11:38:13PM -0500, Chris Muller wrote: >> If >> >> '3/31/2011' asDate >> >> is executed in two different time-zones, it will produce two Dates >> which are not equal (#=). >> >> The view is that a Date is a "Timespan with duration of 1 day," and >> the implementation is strict-enough to respect that that duration >> occurs at different times for everyone around the world. >> >> Date>>#< (the less-than selector) also respects the time-zone, the >> time-zone which occurs further west is > the one created in the east >> since it started after. >> >> But when Dates from different TimeZones are intermixed into a >> persistent object-model, it circumvents an elegant simplicity of >> comparing dates. March 31st coincides within 24 hours for all of us, >> and so that's "close enough" for many applications to want to consider >> the object, [March 24th, 2011], as equal to all of the other [March >> 24th, 2011] Dates regardless of which TimeZone they occurred in. >> >> It is absolutely correct that DateAndTimes respect Time-Zones as they >> do. What do you think about Dates? > > I think of a Date as a view on a PointInTime, and from that > perspective the answer to your question would be yes, a Date > should represent a date relative to some time zone. > > Having said that, I would note that it is difficult to do this > "correctly" with the representation of Date and DateAndTime in > Squeak, largely for historical reasons. > > If you are interested in storing date information in a persistent > object-model, such that you are storing values that refer to different > points in time in different time zones, then there is no really > "correct" way to do it. Consider for example the problem of > calculating elapsed seconds between two point in time in two > different time zones in the case where a daylight savings transition > has occurred in one of the two time zones. Or the problem of > defining a date in terms of duration if a daylight savings transition > has occurred during that time span. > > Please try loading TimeZoneDatabase from SqueakMap (or from > http://www.squeaksource.com/TimeZoneDatabase), and have a look > at the included documentation and unit tests. This will give > you a better feel for the inherent problems, and I'd certainly > be interested in any feedback you might have. > > As an aside, the TimeZoneDatabase package is something I wrote > long ago, and that I expected to be very popular when folks > started doing server applications like Seaside. On the other > hand, I wrote OSProcess to entertain myself and expected that > no one would pay any attention to it. So now OSProcess is quite > popular, and TimeZoneDatabase is universally ignored. Go figure ;-) > > Dave > > >

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RE: [Seaside] [ANN] Alan Kay to talk about "Next steps for qualitatively improving programming" at HPI in Potsdam
by Ron Teitelbaum 08 Jul '11

08 Jul '11

Very cool! Ron > -----Original Message----- > From: seaside-bounces(a)lists.squeakfoundation.org [mailto:seaside- > bounces(a)lists.squeakfoundation.org] On Behalf Of Robert Hirschfeld > Sent: Thursday, July 07, 2011 7:41 PM > To: Seaside - general discussion > Subject: [Seaside] [ANN] Alan Kay to talk about "Next steps for qualitatively > improving programming" at HPI in Potsdam > > It is my great pleasure to announce Alan Kay's talk here at HPI. > > Title: "Next steps for qualitatively improving programming" > > Venue: Lecture Hall 1, Hasso-Plattner-Institut Potsdam, Germany > > Date and time: July 21 (Thu) 2011, 16:00-17:00 > > Additional information: > http://www.vpri.org/html/people/founders.htm > http://www.hpi.uni-potsdam.de/hpi/anfahrt?L=1 > http://www.hpi.uni-potsdam.de/news/beitrag/computerpionier-alan-kay- > wird-hpi-fellow.html > > (Alan's talk will be recorded and made available online.) > > Best, > Robert > > -- > Robert Hirschfeld > Hasso-Plattner-Institut > hirschfeld(a)hpi.uni-potsdam.de > www.hpi.uni- > potsdam.de/swa_____________________________________________ > __ > seaside mailing list > seaside(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

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Oddity in Pharo 1.2.1
by blake 07 Jul '11

07 Jul '11

On one of my Windows machines, the Pharo one-click download calls up a splash screen when it starts. The oddity is, it pulls c:\Program Files\Scribe\splash.bmp. If I delete that file, it doesn't show a splash screen at all. No big deal. Just...odd.

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Several quick questions
by thej 07 Jul '11

07 Jul '11

Several quick questions... What Android devices are supported by Squeak and which tablet Android device would any of you suggest (low price, good performance and of course, works with Squeak) What Instant messaging protocols are available in Squeak? Is there a twitter client ? What Audio formats are supported in Squeak and how can I play MP3s and AAC files? Thanks! Jason H

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Should Dates be Timezone-specific?
by Chris Muller 07 Jul '11

07 Jul '11

If '3/31/2011' asDate is executed in two different time-zones, it will produce two Dates which are not equal (#=). The view is that a Date is a "Timespan with duration of 1 day," and the implementation is strict-enough to respect that that duration occurs at different times for everyone around the world. Date>>#< (the less-than selector) also respects the time-zone, the time-zone which occurs further west is > the one created in the east since it started after. But when Dates from different TimeZones are intermixed into a persistent object-model, it circumvents an elegant simplicity of comparing dates. March 31st coincides within 24 hours for all of us, and so that's "close enough" for many applications to want to consider the object, [March 24th, 2011], as equal to all of the other [March 24th, 2011] Dates regardless of which TimeZone they occurred in. It is absolutely correct that DateAndTimes respect Time-Zones as they do. What do you think about Dates?

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Daily Commit Log
by commits＠source.squeak.org 07 Jul '11

07 Jul '11

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2011-July/004839.html Name: KernelTests-cmm.196 Ancestors: KernelTests-bf.195 Added test to compare Dates created in different TimeZones. =============================================

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