Squeak-dev January 2007

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160 participants
184 discussions

Re: Hello and a question about TextFieldMorph
by Jerome Peace 10 Jan '07

10 Jan '07

Hello and a question about TextFieldMorph Hi Javier, Thanks for your report. You've written to the list and you've put your report on mantis. That is as likely to attract a volunteer guru as anything. Waving money at the problem is the only way I know to insure attention. I did look into the bug. A quick look did not turn up the root cause. I did notice that the glitch is very short lived. Almost anything will knock the text back to the top right position. (Even copying the explorer I genned up to look at things did the trick. Try tracking down a bug whose symptom squirms out from under you. Not an easy task.) Two observations. One I did not have the problem with either of the text morphs from the object window. I had to go out of my way to get a TextFieldMorph. So you might switch morphs. The other observation was sending the instance of the TextFieldMorph the message #fit would clear up the problem. So you could look into doing that if you have your heart set on the TextFieldMorph. Yours in service, -- Jerome Peace >Javier Reyes jreyes at gmail.com >Mon Jan 8 11:55:59 UTC 2007 wrote: > > >Hello Jerome, > >Thanks very much. I have just written a mantis report about it. >¿Any Ideas of how could I get in touch with any Morphic guru? Reporting the >bug is the right thing to do, but I'm afraid I need some faster solution or >shortcut for my project. I'm new using squeak and I would appretiate any >suggestion as for user groups, forums or whatever you can recomend besides >squeak-dev. > >Best regards, > -Javier __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Re[4]: module: 'SoundPlugin' on Mac OS.
by efimov 10 Jan '07

10 Jan '07

Hello, squeak-dev, We have different problems with RecordingControlsMorph. Mac OS Squeak 3.7-7 (3.7-5989) - VM crashes after rec button/any button Mac OS Squeak 3.8.14b7 (3.8.14b7) - VM crashes after rec button Unix 3.7-7 #1 Sun Oct 8 20:08:59 NOVST 2006 gcc 4.0.2 Squeak3.7 of '4 September 2004' [latest update: #5989] Linux 2.6.16-1.2069_FC4 #1 Tue Mar 28 12:19:10 EST 2006 i686 i686 i386 GNU/Linux default plugin location: /home/squeak/squeak/lib/squeak/3.7-7/*.so - application is buzzing after rec button. Mac OS Squeak 3.7-7 (3.7-5989) // have no crash damp /Users/piumarta/squeak/3.7/platforms/unix/vm-sound-MacOSX/sqUnixSoundMacOSX.c:510: failed assertion `s && s->buffer' Version: Squeak VM 3.8.14b7 (3.8.14b7) PID: 9278 Thread: 0 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000004 Thread 0 Crashed: 0 org.squeak.Squeak 0x000ce3c4 Stream_setFormat + 596 1 org.squeak.Squeak 0x000ce3b4 Stream_setFormat + 580 2 org.squeak.Squeak 0x000cf048 sound_StartRecording + 152 3 org.squeak.Squeak 0x0004ef00 primitiveSoundStartRecording.86 + 160 4 org.squeak.Squeak 0x000b298c primitiveExternalCall + 1212 5 org.squeak.Squeak 0x000bdb3c interpret + 6956 6 org.squeak.Squeak 0x000e4f4c EventLoopEventHandler.109 + 156 7 com.apple.HIToolbox 0x9321c794 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 692 8 com.apple.HIToolbox 0x9321beec SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 372 9 com.apple.HIToolbox 0x9321bd68 SendEventToEventTargetWithOptions + 40 10 com.apple.HIToolbox 0x932230c8 ToolboxEventDispatcherHandler(OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*) + 704 11 com.apple.HIToolbox 0x9321c9e4 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 1284 12 com.apple.HIToolbox 0x9321beec SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 372 13 com.apple.HIToolbox 0x93222c8c SendEventToEventTarget + 40 14 com.apple.HIToolbox 0x932639a0 ToolboxEventDispatcher + 92 15 com.apple.HIToolbox 0x9326392c HLTBEventDispatcher + 16 16 com.apple.HIToolbox 0x93261ee4 RunApplicationEventLoop + 148 17 org.squeak.Squeak 0x000e5034 RunApplicationEventLoopWithSqueak + 196 18 org.squeak.Squeak 0x000611cc main + 988 19 org.squeak.Squeak 0x00007608 _start + 392 (crt.c:267) 20 dyld 0x8fe01048 _dyld_start + 60 Thread 1: 0 libSystem.B.dylib 0x90054fc8 semaphore_timedwait_signal_trap + 8 1 libSystem.B.dylib 0x90071648 pthread_cond_timedwait_relative_np + 556 2 ...ple.CoreServices.CarbonCore 0x90bfbe90 TSWaitOnSemaphoreCommon + 176 3 ...ple.CoreServices.CarbonCore 0x90c03e2c TimerThread + 60 4 libSystem.B.dylib 0x9002ba68 _pthread_body + 96 Thread 2: 0 libSystem.B.dylib 0x9000b0a8 mach_msg_trap + 8 1 libSystem.B.dylib 0x9000affc mach_msg + 60 2 com.apple.CoreFoundation 0x907e3b78 __CFRunLoopRun + 832 3 com.apple.CoreFoundation 0x907e347c CFRunLoopRunSpecific + 268 4 com.apple.audio.CoreAudio 0x9148c83c HALRunLoop::OwnThread(void*) + 264 5 com.apple.audio.CoreAudio 0x9148c5dc CAPThread::Entry(CAPThread*) + 96 6 libSystem.B.dylib 0x9002ba68 _pthread_body + 96 Thread 0 crashed with PPC Thread State 64: srr0: 0x00000000000ce3c4 srr1: 0x000000000200f030 vrsave: 0x0000000000000000 cr: 0x24024444 xer: 0x0000000000000004 lr: 0x00000000000ce3b4 ctr: 0x0000000000000001 r0: 0x0000000000000000 r1: 0x00000000bfffc9c0 r2: 0x00000000000ce3b4 r3: 0x0000000000000000 r4: 0x0000000000411710 r5: 0x0000000000000001 r6: 0x00000000ffffffff r7: 0x0000000000000006 r8: 0x000000007fffffff r9: 0x00000000a0001fac r10: 0x000000000000000d r11: 0x0000000044024442 r12: 0x000000009000660c r13: 0x0000000000122c70 r14: 0x00000000bfffcc00 r15: 0x00000000a321c4f8 r16: 0x0000000000412960 r17: 0x00000000bfffd0e0 r18: 0x000000004a4d4d32 r19: 0x000000004a4d4d32 r20: 0x000000000041cc50 r21: 0x00000000ffffd96e r22: 0x0000000000000000 r23: 0x0000000000001340 r24: 0x0000000000122c70 r25: 0x0000000000100000 r26: 0x0000000000000001 r27: 0x00000000000014a8 r28: 0x0000000000100000 r29: 0x000000007fffffff r30: 0x0000000000000001 r31: 0x0000000000411710 Binary Images Description: 0x1000 - 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We have tested it under several operating environments and found it working only on Windows. On Linux the virtual machine starts an indefinite wait in __read_nocancel() when one pushes that same "Record" button in the RecordingControlsMorph. Interestingly, the use of __read_nocancel() suggests running in multiple threads, however we could see only one execution thread in the VM process. Can you give an advice on how to make SoundPlugin recording functionality to work on UNIX? Here is some information on the VM versions that we used Linux: $ ./build/squeak -version 3.7-7 #1 Sun Oct 8 20:08:59 NOVST 2006 gcc 4.0.2 Squeak3.7 of '4 September 2004' [latest update: #5989] Linux 2.6.16-1.2069_FC4 #1 Tue Mar 28 12:19:10 EST 2006 i686 i686 i386 GNU/Linux default plugin location: /home/squeak/squeak/lib/squeak/3.7-7/*.so -- Best regards, Danil mailto:daniil.efimov@sibers.com You wrote 23 декабря 2006 г., 0:19:57: > If you try a Carbon Mac VM, say the 3.8.14b7 what happens. > "RecordingControlsMorph Squeak crashes!" > Does this mean the VM application crashes, if so do you have a crash > log from OSX? > Is sound recording running when you ask for the sample rate? If sound > recording is not running again I believe the behavior is to fail the > primitive. > On Dec 22, 2006, at 6:41 AM, efimov wrote: >> for Mac OS Squeak 3.7-7 (3.7-5989): >> Smalltalk listLoadedModules >> #('SocketPlugin 19 March 2005 (i)' >> 'LargeIntegers v1.3 19 March 2005 (i)' >> 'Matrix2x3Plugin 19 March 2005 (i)' >> 'FloatArrayPlugin 19 March 2005 (i)' >> 'B2DPlugin 19 March 2005 (i)' >> 'BitBltPlugin 19 March 2005 (i)' >> 'UnixOSProcessPlugin 19 March 2005 (i)' >> 'SecurityPlugin 19 March 2005 (i)' >> 'FilePlugin 19 March 2005 (i)' >> 'MiscPrimitivePlugin 19 March 2005 (i)') >> >> >> the most interesting is >> for Mac OS Squeak 3.7-7 (3.7-5989) >> Smalltalk listBuiltinModules >> 29 - 'SoundPlugin 19 March 2005 (i)' >> >> but when i try to launch >> >> <primitive: 'primitiveSoundGetRecordingSampleRate' module: >> 'SoundPlugin'> >> self primitiveFailed >> >> - it return - self primitiveFailed. >> >> so i could not look at the primitiveSoundGetRecordingSampleRate value. >> >> After that when I push any button on the RecordingControlsMorph >> Squeak crashes! >> >> John, thank you for your prompt reply. >> -- >> Best regards, >> Danil mailto:daniil.efimov@sibers.com > -- > ======================================================================== > === > John M. McIntosh <johnmci(a)smalltalkconsulting.com> > Corporate Smalltalk Consulting Ltd. > http://www.smalltalkconsulting.com > ======================================================================== > ===

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Bug Server down
by Michael Rueger 09 Jan '07

09 Jan '07

Hi all, due to an extended network (segment) outage at our ISP the impara server and therefore Mantis is unreachable. According to the status page they have connectivity back up, but impara is still unreachable. Michael

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Fwd: [Squeak-ev] Squeak Stammtisch Bern 25.01.07
by Klaus D. Witzel 09 Jan '07

09 Jan '07

Hi all, if you have time and can make it to Bern, we'll do another incarnation of Squeak Stammtisch at the traditional location and the date mentioned below (Stammtisch has something to do with fun and beer :) Every Squeaker and Smalltalker is welcome! /Klaus ------- Forwarded message ------- From: "Marcus Denker" <denker(a)iam.unibe.ch> To: "Squeak in Germany / Squeak in Deutschland" <squeak-ev(a)lists.squeakfoundation.org> Cc: Subject: [Squeak-ev] Squeak Stammtisch Bern 25.01.07 Date: Mon, 08 Jan 2007 13:22:08 +0100 Hallo, Am 25.01.07 gibt's wieder einen Stammtisch in Bern: Wann? Donnerstag, 25.01, ab 17:30 Wo: Altes Tramdepot, Bern http://www.altestramdepot.ch/ Marcus

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heading = forwardDirection +etc (Ans to Andrew and Karl)
by Jerome Peace 09 Jan '07

09 Jan '07

heading = forwardDirection + rotationDegrees (was Re: How can we deal with Message rot?) Hi Karl, Hi Andrew (see your reply below Karl's) >karl karl.ramberg at chello.se >Mon Jan 8 07:41:12 UTC 2007 added: > >Morphic has it's flaws... > >Morphic transformations were retrofitted and this was kept trough the >ages as no one found it compelling enough to refactor Morphic to handle >transformations without using the TransformationMorph stuff. > >Tweak is next generation Morphic, and is written to handle >transformation from the ground up, but it has less users and less >documentation etc... Tweak polygons shrink when rotated. So I continue to repair morphic and hope what ever I learn may be ported to tweak if the tweak developers are so motivated. ----- Hi Andrew Thanks for noticing my note. I have done some work to address the polygon rotation problem. And I've been able to achieve some preliminary results See Mantis: http://bugs.impara.de/view.php?id=5498 Summary 0005498: Polygons don't render/orient submorphs correctly when tilted or grown. Which points to a work in progress milestone available at: http://209.143.91.36/super/724 PolyFix02-wiz The keys are that reference positions for submorphs need to be transformed similarly to the vertices of polygons. And fixing polygons are not enough. There are integration issues involved. The invariants that need to hold true (in my user story are) 1) heading = forwardDirection + rotationDegrees 2) What's placed at the reference point stays at the reference point. 3) All morphs should "appear" to behave similarly when rotated, scaled or grown. 4) When grabbed from or dropped into a morph the grabbee/droppee should always retain its apparent location and appearence. Mostly these don't happen across all morphs in squeak. In many cases they don't happen in any morphs. My approach is to keep these goals in mind as I do the small repairs and eventual try code that will effect the larger repairs. Along the way it will be interesting to see if the community will "accept" the proposed changes. >Andrew P. Black black at cs.pdx.edu >Mon Jan 8 04:02:46 UTC 2007 wrote: > <<much snipped>> >Last night, I was trying to do a Morphic version of Adele Goldberg's >"Joe the Box" as presented in Mark Guzdial's book. Because I have >had students really confused by TransformationMorphs (which break the >rule that every Morph is visible on the screen), I made a "BoxMorph" >just a subclass of PolygonMorph with four vertices. This worked >pretty well, except that rounding errors accumulate as you rotate the >box; There is a tradition of early and aggressive rounding/truncation in morphic that seems to cause cumulative rounding errors. The solutions are to delay the conversion to integer as long as possible and then to take care to do the correct type of conversion.(floor or ceiling for points, and sometimes expanded or compressed for rectangles.) > I couldn't think of a simple solution to that. Then I did >NamedBoxMorph, which puts a text morph containing the Box's name >(joe, jill, etc) in the center of the Polygon. > >Well, as you rotate the Box, the text inside does _not_ rotate. This >is not what I expect from embedded submorphs. It turns out that >there is no code in PolygonMorph to rotate the submorphs. I think >that this is a bug, Yep. It is see the mantis report. Help and attention are needed to get it fixed. >but writing the code involves more than I know. >(I did try. Applying a MorphicTransformaiton to a point is easy, but >applying it to a Morph --- that I couldn't figure out.) >Also, as you rotate the PolygonMorph, and morph at its center refuses >to stay at the center. It "precessses" towards the origin and back. Cumulative roundoff gribbles pretty much. And the feedback loop between rotation and bounds and bounds and center of rotations reference point. That needs both a local (for polygon) fix and a global rethink. The polygons aren't too hard to fix. You define your reference center as vertices average. If you don't round when rotating that will stay in one place. >Try it. (My code is in a publicly readable SqueakSource project at >http://www.squeaksource.com/PSUCS520 . The package is called CS520- >MorphicBoxes). I've downloaded this. Will take a look when I have a chance. thanx. > >So I gave up, and tried a different approach, which I have used >previously. I made a BoxMorph2 a TransformationMorph, with a >RectangleMorph inside it. Both of them the same size. Easy to set >up, right? Just give them the same bounds. Wrong. Even before they >are in any world, the TransformationMorph has resized itself and has >changed it's scale factor to 1.7 Wow that's a cool bug. May I suggest writing it up on mantis as a complaint. Then its might gather clues from others or even a solution. I'm reduced to trial and error to >find an initialization sequence that works. But when I find one, the >BoxMorph2 can indeed be rotated. > >Then I put a TextMorph in the center (myBoxMorph2 addMorphCentered: >aTextMorph). All hell breaks loose. The label is a couple of >inches down and to the right of the box. blue-clicking on the box >puts the halo around the label. I spend a long time looking for this >bug, and find somewhere in the re-computation of the bounds that >fullbounds of the BoxMorph2 has grown by a factor of 2 to 3 (but >different factors in the x and y directions). I'm supposed to >explain this to studnets when I have no idea waht is going on >myself. Yeah, this one would be easier to fix than write the manual for. Things are getting added, The distance from owner bounds topleft to the unrotated added morph top left is being maintained. (or something like that.) I don't remember if the actual vector participates in the transform or not. What did Dan Ingalls write about "personal mastery?" > >I eventually get it working by embedding the TextMorph inside the >RectangleMorph (which is inside the Transformation Morph). Why does >it work this way around and not the other way? tForm morphs are built to assume they will have only one renderer. They can of course have more but this screws up when the assumption is relyed upon by some other piece of code. Embedding in the rendee works better cause it keeps the reedee/render ratio = 1. Beats me. The code >is ugly because I use findA: to get hold of the internal >RectangleMorph. morph renderedMorph will find the correct thingamabob. (So, later I did see the comment that says: >"TransformationMorphs are assumed to have only one submorph". If >that's true, maybe one should get an error when an attempt is made to >add a second one?) Another good topic for mantis. > >I keep on thinking that Morphic is really elegant and that all of >this will one day make sense if only I can learn to squint in the >right way. But I'm seriously beginning to wonder ... I fell in love with morphic when I saw you could build stuff by without writing a line of code just poking and grappling with morphs. I learned the rest of squeak so I could make better morphs to use without any deeper knowledge. I'm still trying to find ways to make this happen. Not only is it fun. But it still seems "The Way Its 'Spozed To Be." It bothered me greatly as I came across ways the implementation fell short of the goal. But goal were its supposed to be. And the process to get it there is up to those of us who care. I've fixed polygons so they can stand in for ovals as well as rectangle. I've got more fixes on the way including the rotation fix. >I would really like to know if I'm the only one who feels this way. I think there are a few. One problem is poor channels of communication with the squeakland/OPLC side and squeak-dev side. Or maybe just poor communication between developers and users in general. It make there seem to be fewer interested than really are. > >What to do about it? I think that getting rid of >TransformationMorphs as wrappers (they are not really decorators, >because they are not inserted into the Morphic hierarchy until >something needs to be transformed) would help, and instead giving >each Morph the ability to transform itself. This would involve a >test, of course: myTransformation ifNotNi: [ ... ] which is a tad >ugly. Two points. On one side: The wrapper is an optimizer( you rotate one image and do no have to worry about the recursive rotation of submorphs.) So it would be good to have them in good working condition. And on the alternative side: Two the message could probably be beautiful. aTransformation draw: aMorph on: aCanvas. Identity transformations would know to do the simple thing. The others would take appropriate action or double dispatch. So a morph could always have a transformation initialized using the identity transform as a default. At this stage I leave myself open to both possibilities till I see which is easiest to repair/implement. This is similar to what was done with Alignment a while back >--- giving every Morph the ability to align its submorphs. (However, >I think that that change may have been a mistake; adding a separate >allignmentMorph to the hierarchy makes much more sense to me than >adding a separate TransformationMorph. Moreover, we know that any 2- >D affine transformation can be represented as a 3 x 2 matrix, so >there can be a single universal implementation of transformations Yep. So the third possibility is to make the Matrix3x2 stuff work accurately and correctly. And maybe document it a little because it gets complicated in practice. > > >Andrew P. Black >Department of Computer Science >Portland State University >+1 503 725 2411 > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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wiki.squeak.org
by Andrew P. Black 08 Jan '07

08 Jan '07

How does one recover a password for wiki.squeak.org? I must have had one at some time ... Andrew

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Abandoned Projects
by Ron Teitelbaum 08 Jan '07

08 Jan '07

Hi All, A few open source projects are discussing what to do about abandoned projects. I'd be interested in any opinions about supporting the concept of a living-project document. See: http://on-ruby.blogspot.com/2007/01/abandoned-projects-bus-proofing-and.html I think the idea may have merit but I'm interested in all viewpoints. Thanks, Ron Teitelbaum

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Pushdown automaton
by Günther Schmidt 08 Jan '07

08 Jan '07

He guys, does anybody know of a pushdown automaton implementation in Smalltalk. I want to build my own BNF Parser without the use of SmaCC. Günther

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The Weekly Squeak Summary No. 8: Nov 19, 2006 - Jan 6, 2007
by Michael Haupt 08 Jan '07

08 Jan '07

Dear Squeakers, welcome to the The WeeklySqueakSummary, a weekly report on what's going on in the world of Squeak based on the WeeklySqueak blog. Merry Christmas and a happy new year! It's been quite a while since the last summary, for various reasons. Several low-traffic weeks didn't make summarising them look sensible, and then there were the holidays... here we are again. Highlights of the past weeks: The OLPC project is still being (sometimes heatedly) debated. Nicholas Negroponte, the project's founder, pointedly discusses the project opponents' opinions in a video [1] that also contains some educators' comments. Another video contains a talk on Exupery by Bryce Kampjes [11]. The slides are readable in the video, but unfortunately, the video itself is incomplete because the tape ran out during recording. Finally, there is a tutorial on setting up a SqueakSource image to create your own SqueakSource server [9], making available project-oriented version control for everyone without the need for having access to the server at squeaksource.com itself. The past weeks' news items: [1] Extra! Gemstone Goes Seaside! http://weeklysqueak.wordpress.com/2006/11/21/extra-gemstone-goes-seaside/ [2] Touring Seaside. Creating a Blog with Magritte http://weeklysqueak.wordpress.com/2006/12/06/touring-seaside-creating-a-blo… [3] Breaking Barriers http://weeklysqueak.wordpress.com/2006/12/07/breaking-barriers/ [4] CallBacks! http://weeklysqueak.wordpress.com/2006/12/15/callbacks/ [5] Storing ImageSegments Outside the Image http://weeklysqueak.wordpress.com/2006/12/19/storing-imagesegments-outside-… [6] What are my Options? http://weeklysqueak.wordpress.com/2006/12/20/what-are-my-options/ [7] OOPSLA there it is! oopsla 2006 http://weeklysqueak.wordpress.com/2006/12/20/oopsla-there-it-is-oopsla-2006/ [8] Gjallar demo at OOPSLA 2006 http://weeklysqueak.wordpress.com/2006/12/20/gjallar-demo-at-oopsla-2006/ [9] Creating SqueakSource http://weeklysqueak.wordpress.com/2006/12/23/creating-squeaksource/ [10] Sun Rise or Sun Set? http://weeklysqueak.wordpress.com/2006/12/29/sun-rise-or-sun-set/ [11] Exupery Talk http://weeklysqueak.wordpress.com/2006/12/29/exupery-talk/ [12] Croquet Edit and Create 3d Objects http://weeklysqueak.wordpress.com/2006/12/31/croquet-edit-and-create-3d-obj… [13] Nicholas Negroponte discusses OLPC http://weeklysqueak.wordpress.com/2007/01/02/nicholas-negroponte-discusses-… You can find this and much more on The WeeklySqueak blog, the newsblog dedicated to the world of Squeak: http://news.squeak.org/ Subscribe to the WeeklySqueak RSS feed: http://news.squeak.org/feed/ Happy squeaking, Michael

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Hello and a question bout TextFieldMorph
by Javier Reyes 08 Jan '07

08 Jan '07

Hello Everyone, My name is Javier Reyes and I have just subscribed to this mailing list. I live and work in Madrid, Spain. I am developing an pplication for a Magazine using Squeak. For a small text box (which describes the contents of a page in the magazine) I use a TextFieldMorph. Once initialized the Morph appears with an 'abc' text in the upper left corner. That's fine for me. My problem comes when i delete the last character of the TextMorph. At that moment the Morph changes its color to the default light gray but the text that's written after that doesnt appear in the top left corner anymore but one line below. If I press Alt-0 the text goes back to the corner, but I want that behaviour to be default. This "reset" doesnt happen either if I select the "abc" and write some replacement text, only when the TextFieldMorph is emptied. Any help will be very welcome. Thanks in advance. All the best, -Javier

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