Squeak-dev April 2007

squeak-dev@lists.squeakfoundation.org

151 participants
201 discussions

A newbie needs some help in squeak (maths, algorithm and drawing)
by Christophe Bouchard 26 Apr '07

26 Apr '07

Hello, I have to realize an application in squeak which is an icon generator. My questions are the following: I have an algorithm which describe a spiral and i'd like to transcript it into squeak, but it doesn't work. The original algorithm is: " for( i=0; i < len; i++ ) { theta = 2*pi*float(i) / ppr; r = 0.15 * sqrt(theta); x = r * cos(theta); y = r * sin(theta); } " And what i've done but that doesn't work: " spiral: len with: ppr | theta r x y | 0 to: (len-1) do: [:i | theta = 2* Float pi * i / ppr. r = 0.15 * (self sqrt: theta). x = r * ( self cos: theta). y = r * ( self sin: theta). ] " But this code doesn't work and I don't know how to code my spiral algorithm and how it will be displayed on screen when running. Thank you for your help. Chris

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Squeak3D module missing in VM 3.9.2 on Win32
by Stéphane Rollandin 26 Apr '07

26 Apr '07

hello, with a 3.9.2 VM for windows, SmalltalkImage current listBuiltinModules does not list Squeak3D Squeak3D missing means it is not possible to use Wonderlands, which is bad (at least for me :) so, could we have the 3D support back ? or is there an external plugin available somewhere ? thanks, Stef

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pending mac carbon VM 3.8.17b1
by John M McIntosh 26 Apr '07

26 Apr '07

I've pushed out a 3.8.17b1 universal mac carbon VM to my idisk and ftp site. http://www.smalltalkconsulting.com/squeak.html (a) A fair amount of work was done to make the VM and browser plugin work and not kill each other on these multiple CPU macIntel machines. (b) I added a feature where the VM can open with no window, or you can close the main window, this lets future smalltalk code control when the window does open. (c) After many hours of waiting to install 10.2.8 on my old PB G3 laptop I rechecked the current VM and make changes so that 3.8.17b1 does run on 10.2.8, I note that we broke that in the macIntel port with the 3.8.10 build. (d) The freetype plugin gets a revision to 2.2.2c52 to include an accessor primitive to fetch the OS2 table so we can look at the fstype for font embedding information. (e) The new browser plugin was revised to work with Safari 1.0.3 on 10.2.8. I note we should have an installation package for this on the squeakland site real soon now... Finally I switched to a nice new shinny MacBook Pro so I upgraded XCode to 2.4.1, which of course has gcc version change implications, I did notice the VM is faster on macIntel, people might want to check that. 3.8.17b1 Logic to enable startup without window, and let Ffenstri later add a window, or let Ffenstri close the main window. Also put back the os-x 10.2.8 support by coding around missing routines in 10.2 sqMacOpenGL.c sqMacWindowUniversal.c In ioShowDisplayOnWindow only force open the window if we are not explicit about the open based on the info.plist flag For os-x 10.2.8 fallback to old logic in ioSetDisplayMode sqMacUIEventsUniversal.c Check for window in record mouse logic, also clean up some warning msgs For os-x 10.2.8 beware of kEventParamWindowPartCode, 10.3 feature Use amIOSX102X call to consider if 10.2 and execute old code instead sqMacHostWIndow.c Set window tracking only if window exists sqMacDragDrop.c Beware of setting drop handler, but no main window sqMacOpenGL.c Watch out for no main window sqMacMain.c Add new parm SqueakExplicitWindowOpenNeeded, true if we need to explicit open main window sqMacUnixExternalPrims.c For os-x 10.2.8 fallback to old logic dl () routines 3.8.16b5 Squeak3d logic did not swap bytes corrrectly for macintel. Add parm to config.h and compiler. 3.8.16b4 sqMacSecurity.c Oops get external char [] wrong and why it crashes on strcpy... 3.8.16b3 Changed SqueakBrowserUntrustedDirectory info.plist to SqueakUntrustedDirectory and added SqueakTrustedDirectory. sqMacMain.c warning msg cleanup, add logic to get gSqueakTrustedDirectoryName sqMacSecurity.c Rework how trusted directory is made, always make from info.plist entry, versus old unix hack. warning msg cleanup. 3.8.16b2 sqMacUIEventsUniversal.c Bug fix, optimized out stale screen flushing. experimental, pulled, had bug where asking for vmParm < 0 or >2 < 1000 or 1201 or 1202 would give uuid back, oops 3.8.15b8<<<>>>>browser plugin Fixed issue where when we go to setup the shared memory region the file name is not random enough, thus if timing is right you end up sharing the same shared memory region if you run Safari and FireFox at the same time. That gave one of our testers interesting visual side effects. Fixed window draw issue in Safari, would blank Safari window to white, then not redraw properly, have to follow os-9 rules for updatewindow logic on a update window request. Update cursor logic so that moving out of the plugin window restores the cursor, moving back in sets the special squeak cursor. Don't pass activate or update events to the VM, activate is pointless, update is handled internally, we can draw the screen according to the clip area. Finally make pipe to VM non-blocking, if we get a EAGAIN, we try 20 times then give up. This solves the issue when a person uses the Quit Button in the plugin and stops the VM from running. Of course the screen is not updated now but we still retain control of the cursor,keyboard so you can reload the etoy application via the browser. Before Safari would lockup trying to send data to the non-existant VM. 3.8.16b1 Revision to 3.8.16 because of adding browser full screen support sqMacMain.c on exit reset menu bar if was headless, browser, and went full screen sqMacNSPluginUILogic2.c add helper methods for when in browser mode and gone full screen, also then ignore cmds from browser when in full screen mode. sqMacNSPluginUILogic2.h header changes sqMacUIEvents.h Add missing RunApplicationEventLoopWithSqueak declare sqMacUIEventsUniversal.c When running full screen in browser mode, we need to consider application activation, deactivation, mouse cursor enter/leave, gSqueakBrowserMouseMappings versus gSqueakMouseMappings, screen flushing sqMacWindowUniversal.c On going full screen we need to fix the menu bar, show the window, ensure window context is set correctly, send bits to the window, versus browser, flip squeak to the foreground, and ensure cursor sets go to the foreground versus the browser. On leaving full screen, we must flip to the browser, and hide the window. 3.8.15b8 sqMacNSPluginUILogic2.c Alter shared memory include 20 more bytes to indicate a drawing request and the co-ordinates versus using the pipe. sqMacNSPluginUILogic2.h structure added. sqMacUIEventsUniversal.c Do not flush hidden squeak window, pointless when running in browser mode. sqMacWindowUniversal.c Do not flush hidden squeak window, pointless when running in browser mode. Alter browser screen update logic, use shared memory to indicate a draw is needed and where. Later when we come back to draw the next frame, if the pending draw is not done yet, we wait 1 second in a phtread pause loop in 10 ms increments. This ensures we do not overrun the ability of the browser to draw frames 3.8.15b7 Was test version, not widely distributed. -- ======================================================================== === John M. McIntosh <johnmci(a)smalltalkconsulting.com> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com ======================================================================== ===

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[Benchmark] Richards, Stanford y Copier
by Lautaro Fernández 25 Apr '07

25 Apr '07

Hi everybody, I have been in this group for a long time, and now I need your help. I'm working with different alternatives on Smalltalk, particularly on Squeakand Visualworks. My job is to execute different benchmarks to compare which runs better (more quickly). I'm doing this job because we are going to use one to program software for PDA. Luckyly, I could execute some benchmarks except for *Richards*, *Stanford *and *Copier*. **1** The problem with Richards benchmark is that the implementation that I found was made for VisualWorks. I tried to change it, but I couldn't. I'd like to know if someone has an implementation for Squeak. in the attachment is the *st with Richards Benchmark* ***2* *With *Stanford *I have a different problem. I was looking for information in Internet about this benchmark and I read that is to measure the performance of integers and floats, but I couldn't found the implementation of this benchmark. Anybody knows something about this benchmark? **3* *I've found an implementation of Copier benchmark but I couldn't execute it on Squeak. Anybody has an implementation of Copier for Squeak?. In t his site: *http://pws.prserv.net/dlissett/ben/copier1-smalltalk-109.htm * there are an implementation for Visualworks **4** The last thig I've to ask is for if there some benchmark that you think that is important to be implemented in Squeak or VisualWorks, that allows to compare both languages. Sorry for my english, I'm argentinian Thank you for your time Lautaro Fernández

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Q: Is it possible to create multi user application in Squeak Etoys?
by Akis 25 Apr '07

25 Apr '07

Hello! My name is Akis and I am from Greece. I am quite new in Squeak and Etoys programming. Maybe you have been asked about this before or you may find it stupid but how can I create multi-user apps with Etoys? I was asked by a professor in my university if that is possible and I couldn't answer. By multi-user apps I mean apps that can be used in education, in olpc. For example an application that two or more children with their laptop can use together in a educational scenario through LAN. I want for both them to be able to change the data and to view the results, to be able to talk to each other and exchange ideas etc. Please give me some hints on where to look for this Thanks a lot in advance. Akis Ps. I found out about croquet enviroment. Is this the answer? Can it be used in OLPC

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mac os-x 10.2.x and Squeak
by John M McIntosh 25 Apr '07

25 Apr '07

Well after much waiting about for a 10.2.8 install to happen on a 1999 era powerbook I discovered that the current Squeak VM does not run. In fact it seems I managed to break that feature when I was working on the MacIntel port in Feb of 06, Say about the 3.8.10b13. Now since no-one complained I'm wondering if anyone actually uses 10.2.8 and if they would expect a new VM to run on it? I have made some changes now so the VM will start, but there seems to be some drawing issues, likely 10.2 is buggy. If it's too buggy well it might not get fixed. However I'll collect opinions first. -- ======================================================================== === John M. McIntosh <johnmci(a)smalltalkconsulting.com> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com ======================================================================== ===

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SqueakSource issue
by Andrew P. Black 24 Apr '07

24 Apr '07

When trying to "save" to SqueakSource, I get the following error: 'HTTP/1.1 302 Found Date: Mon, 23 Apr 2007 05:08:59 GMT Server: Apache/1.3.33 (Darwin) mod_jk/1.2.6 mod_ssl/2.8.24 OpenSSL/ 0.9.7i PHP/4.4.1 Location: http://www.squeaksource.com/AdvancedProgramming/ImageFixes- apb.1.mcz Connection: close Content-Type: text/html; charset=iso-8859-1<!DOCTYPE HTML PUBLIC "-// IETF//DTD HTML 2.0//EN"> <HTML><HEAD> <TITLE>302 Found</TITLE> </HEAD><BODY> <H1>Found</H1> The document has moved <A HREF="http://www.squeaksource.com/ AdvancedProgramming/ImageFixes-apb.1.mcz">here</A>.<P> <HR> <ADDRESS>Apache/1.3.33 Server at squeaksource.com Port 80</ADDRESS> </BODY></HTML> ' The location looks right; I can browse the repository at that location just fine. The url in the "the document has moved ... " message is indeed the one that I'm trying to write to, but it doesn't get created. What am I doing wrong? I used to be able to write there... The next day, everything worked fine. Andrew P. Black Department of Computer Science Portland State University +1 503 725 2411

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[ENH] Two new commands for OB to ease testing
by Bergel, Alexandre 24 Apr '07

24 Apr '07

Select a test method or a class, and press Apple-t. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.software-artist.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Defining a new command
by Bergel, Alexandre 24 Apr '07

24 Apr '07

Dear all, I just defined a new command for Omnibrowser, however, how can I make it appear on the method menu list ? There should be a magic invocation i guess :-) Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.software-artist.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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SmaCC: Shift/Reduce Conflict
by Alexandre Bergel 24 Apr '07

24 Apr '07

Dear all, I bumped into a conflict while writing a small grammar. Would be great to know why. The problem seems to come from the Assignment I wish to parse the following: myfunction (a, b, c){ 3 + 10 var z z = 50 + foo() } Parser: -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Program : FunctionDefinition * {SPProgram new functions: '1'}; FunctionDefinition : Id Arguments "{" ExpressionList "}" {SPFunction new name: '1'; arguments: ('2' select: [:o| (o isKindOf: SmaCCToken) not]); expressions: '4'}; Arguments : "(" ArgumentList ")" {'2'}; ArgumentList : ArgumentList "," Id | Id | ; ExpressionList: Expression ExpressionList | ; Expression : FunctionCall | VariableDefinition | Id "=" ExpressionWithValue {SPAssignment new name: '1'; expression: '3'} | Expression "+" Number {SPAddition new left: '1'; right: '3'} | Expression "-" Number {SPMinus new left: '1'; right: '3'} | Number {'1'}; FunctionCall : Id ArgumentsInCall {SPFunctionCall new name: '1'; arguments: '2'}; ArgumentsInCall : "(" ArgumentsListInCall ")" {'2' select: [:o| (o isKindOf: SmaCCToken) not]}; ArgumentsListInCall : ArgumentsListInCall "," Expression | Expression | ; VariableDefinition : "var" Id {SPVariableDefinition new name: '2'}; ExpressionWithValue : ExpressionWithValue "+" Number {SPAddition new left: '1'; right: '3'} | ExpressionWithValue "-" Number {SPMinus new left: '1'; right: '3'} | Number {'1'}; Number : <number> {'1' value asNumber} ; Id : <variable> {'1' value asString} ; -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Scanner: -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= <number> : [0-9]+; <whitespace> : \s+; <variable> : [a-zA-Z] \w* ; -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Regards, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.software-artist.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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