Squeak-dev August 2009

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114 participants
300 discussions

blurred class's comment in Tools package
by Raymond Asselin 08 Aug '09

08 Aug '09

As I looking on Tools package I stumbled on openFullProtocolForClass's and openSubProtocolForClass's comments, and they are the same. But the result isn't the same as with ..SubProtocol.. you eliminate protocols from ProtoObject and from Object. Where can we find that SubProtocol means this...? May I change the class's comment of ..SubProtocol.. like: " Create and schedule a browser for the entire protocol of the class minus the protocols inherited from ProtoObject and Object classes"

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[squeak-dev] squeakfest at UCLA next week; bring a child, get in free
by Timothy Falconer 08 Aug '09

08 Aug '09

Hi everyone, We're two days away from the start of Squeakfest USA (http://squeakfest.org ), which is being held at the UCLA Faculty Center from Monday, August 10th to Wednesday, August 12th. We're excited by the presentations we've got lined up, including a keynote by Alan Kay. Presenters will discuss how they're using Squeak Etoys and OLPC XOs in places like Nepal, South Korea, Uruguay, Haiti, Nicaragua, the United States, and more. We've still got room in our children's workshop, which runs from noon to two each of the three days. Kids aged 8 to 12 will use Etoys on provided XOs, learning to create animations and stories, just like in the Waveplace pilots. Best of all, if you bring a child, we'll waive your registration fee, which is otherwise $125 for the conference. Take care, Timothy

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trunk update problem
by Bernhard Pieber 08 Aug '09

08 Aug '09

Hello, I downloaded http://squeakvm.org/win32/release/Squeak-3.10.2-trunk.zip and hit the "Load code from server" button. I get a MNU during installing Graphics-ar.63: Cheers, Bernhard

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Status on VM's (Coq, JIT)
by Torsten Bergmann 07 Aug '09

07 Aug '09

For those who dont read vm-dev, here is a short status on Coq. Bye Torsten [1] http://lists.squeakfoundation.org/pipermail/vm-dev/2009-August/002892.html -- Neu: GMX Doppel-FLAT mit Internet-Flatrate + Telefon-Flatrate für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02

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step through VM source
by Ang Beepeng 07 Aug '09

07 Aug '09

I was looking at Croquet VM source code and stepping through the code. It seems like the interpret() loops forever, while I expect to find a point where it finished initialization and wait for user input. I know that it loops forever, but what is the VM doing before it gets any input from the user? Thanks. Ang Beepeng -- View this message in context: http://www.nabble.com/step-through-VM-source-tp24678490p24678490.html Sent from the Squeak - Dev mailing list archive at Nabble.com.

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Is Lukas repository down?
by Miguel Enrique Cobá Martinez 07 Aug '09

07 Aug '09

I can't reach http://source.lukas-renggli.ch/ is down?

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unload method not called by Monticello
by Miguel Enrique Cobá Martinez 07 Aug '09

07 Aug '09

Take a clean sq3.10.2-7179web09.03.1.image. World Menu -> Universe browser (basic) Select category Network. Install RFB-VNC version 1.2. Start the vnc server World Menu -> RFB/VNC Server -> start server display 0 Accept. The server is now running and a RFBDisplayScreen is installed instead of the normal Display. An RFBEventSensor is installed instead of the normal InputEventSensor. If you stop the RFB server, the original Display and Sensor are restored. Until here everything ok. The RFBServer has an unload method, that is, as I understand, called on class unload from the image. The problem is that is not called. Check this: RFBServer class >> unload "RFBServer is being removed from the image." self stop; unregisterInOpenMenu RFBServer class >> stop "RFBServer stop" Server isNil ifTrue: [self log: 'server not running?'] ifFalse: [Server := Server stop. Smalltalk removeFromStartUpList: self; removeFromShutDownList: self]. ^nil Server is a class variable with an instance of RFBServer. RFBServer >> stop "Stop the RFB server, closing all open viewer connections." process ifNotNil: [ process terminate ]. socket closeAndDestroy. self log: 'stopped'. self terminateSessions. self release. ^nil RFBServer >> release "Release resources associated with the server. This method is mainly to ensure that the runLoop process doesn't try to touch any of the following again..." self removeDisplay. sessions := nil. sessionsSema := nil. process := nil. self log: 'released' and finally: RFBServer >> removeDisplay "The RFB server is shutting down. Remove our fake Display and Sensor, replacing them with the originals." ((Display isMemberOf: RFBDisplayScreen) and: [Sensor isMemberOf: RFBEventSensor]) ifFalse: [^self]. (Display := DisplayScreen new copyFrom: Display) beDisplay. Sensor become: (Sensor copyTo: EventSensor new). self log: 'RFBDisplayScreen. RFBEventSensor removed' Well, several methods. The point is, the unload method, through several calls, reaches removeDisplay that restores the Display and Sensor classes to their original non-RFB ones. If you start the server, then stop it and finally with monticello you unload the RFB package, everything is ok, because when you stop the server the releaseDisplay is called correctly. But, if you start the server, you don't stop it and you remove it with monticello, the unload method is not called and the releaseDisplay neither. So, Display and Sensor are the RFB-installed ones. As you are unloading the RFB package with monticello, the package is unloaded and you end with AnObsoleteRFBDisplayScreen for Display and AnObsoleteRFBEventSensor for Sensor. Someone has an idea about what is happening and why the unload method isn't being called (I even put a self halt in it but it never got called)? Thanks, Miguel Cobá

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font confusion
by Ralph Boland 07 Aug '09

07 Aug '09

I am using Squeak 3.10.2 on Ubuntu 9.04 (Linux). By making minor changes to Squeak I was able to have certain of my objects (trees) display themselves as text rather than as strings when they are the result of a message sent on a Workspace. E.g. evaluating 'MyTree randomTreeOfSize: 10' on a workspace would do it. Objects which don't support this feature are displayed using the normal printOn: method. The text that my trees generate for self display have color attributes and the colors are displayed correctly. I have also overwritten displays of some characters between 128 and 225. For example if I evaluate '225 asCharacter' I will see one of my special characters rather than the normal accented character. If I have a tree displayed as text then sometimes my special characters are printed correctly but other times they are not (Either all special characters are printed correctly or all are not). When my special characters are not printed correctly then the ones that would normally be displayed in Squeak are displayed instead. For example, even though I see '225 asCharacter' as one of my special characters, if I use this character in a tree text it may be displayed as an accented character. If I convert the text representation of one of my trees to a string then all the special characters are displayed correctly (but of course the color is lost). I don't know the circumstance that determines which is displayed but I guessed, that since in my tree text there is not a specification of a font, somewhere a different font was being used and that I should specify which font I want to be used for my tree text. At this point I became confused. I was expecting to be able to do something like: 'aText useFont: aFont'. But I could not figure out how I am supposed to set the font I want to use for my text. Can anyone explain? Is there good documentation anywhere? One final point of confusion. Since I have modified my image to display arrows for the _ character and the ^ character, I put the _ character in my tree's text as a test. It displays as an arrow even when my special characters do not display correctly. This is confusing because my code to set the display of my special characters mirrors the code I used to change the display of the _ and ^ characters. I picked up the code for displaying the arrows from the Internet. It goes through the fonts in the fontArray variable of the TextStyle default object and sets the arrows for the fonts of type StrikeFont or StrikeFontSet. Any help to lessen my confusion much appreciated. Ralph Boland

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Unix OSProcess error
by Andreas Raab 07 Aug '09

07 Aug '09

Hi - This morning I was greeted with a sequence of "Error: cannot create OS pipe" from one of our servers (running RHEL 5.3) and I am trying to understand what might be causing this. The call stack is included below; it appears that #makePipeHandles returns nil and I am not sure what might be causing this. Is there a possibility that there is some limit on the number of handles that we might be exceeding? Some missing cleanup? Thanks for any help, - Andreas ExternalPipe>>makePipe Receiver: an ExternalPipe Arguments and temporary variables: handleArray: nil Receiver's instance variables: writer: nil reader: nil blocking: nil ExternalPipe>>initialize Receiver: an ExternalPipe Arguments and temporary variables: Receiver's instance variables: writer: nil reader: nil blocking: nil ExternalPipe class>>blockingPipe Receiver: ExternalPipe Arguments and temporary variables: Receiver's instance variables: superclass: Stream methodDict: a MethodDictionary(#atEnd->a CompiledMethod(58: ExternalPipe>>atEnd...etc... format: 136 instanceVariables: #('writer' 'reader' 'blocking') organization: ('testing' atEnd atEndOfFile closed isPipe) ('accessing' blocking...etc... subclasses: #(OSPipe) name: #ExternalPipe classPool: nil sharedPools: nil environment: a SystemDictionary(lots of globals) category: #'OSProcess-Base' PipeableOSProcess>>createInputPipe Receiver: a PipeableOSProcess on nil Arguments and temporary variables: Receiver's instance variables: dependents: nil pipeToInput: nil pipeFromOutput: nil errorPipelineStream: nil pipeFromError: nil processProxy: nil keepInitialStdOutOpen: nil keepInitialStdErrOpen: nil accessProtect: a Semaphore() completion: a Semaphore() -------------------------------------------------------------------- PipeableOSProcess class>>new:arguments:environment:descriptors:workingDir:errorPipelineStream: PipeableOSProcess class>>forkAndExec:arguments:environment:descriptors:workingDir:errorPipelineStream: PipeableOSProcess class>>command:environment:workingDir:input:output:error:errorPipelineStream:shellSyntax: PipeableOSProcess class>>command:environment:workingDir:input:output:error:errorPipelineStream:

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[Ann] Cuis updated to #0258
by Juan Vuletich 07 Aug '09

07 Aug '09

Hi Folks, A new release of Cuis is available at http://www.jvuletich.org/Cuis/Index.html . As you might guess, biggest news is the latest round of fixes to anti-aliased StrikeFonts I uploaded to the Squeak trunk these last days. Anyway, there are many other interesting things about Cuis, so even if Squeak has my new fonts now, take a look at Cuis anyway. Cheers, Juan Vuletich

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