Squeak-dev February 2005

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191 participants
430 discussions

Re: Modules
by Richard Staehli 26 Feb '05

26 Feb '05

On Feb 22, 2005, at 7:53 PM, Dan Ingalls wrote: > Meanwhile, I'd like to proceed simply to ask for people interested in > putting modules into Squeak. > If it's not too late, I'm interested as well. > What would you like to see in such a system? #1: Ability to efficiently build minimal and consistent images for arbitrary applications by automated module load scripts, beginning from a very tiny core (like spoon). Module dependencies are managed automatically. #2: The ability to package arbitrary changes to an image as a module for sharing with others. #3: Any two modules may be loaded in a single image without conflict, since implementations are encapsulated. > Are you mainly interested as a designer, implementor, or user? Mostly as designer, tester and user. I hesitate to promise that I can contribute much to implementation, but I'd like to. > Anything else you'd like to say. I've been working on component architecture research the last three years and am eager to test better module schemes in this context. That and I'm currently unemployed and have time to invest. Richard Staehli

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Refactorings
by Jason Rogers 25 Feb '05

25 Feb '05

I would like to introduce some refactorings into Squeak. Is there a document describing the process of extending the Refactory? -- Jason Rogers "I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me." Galatians 2:20

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RE: [UPDATES] 7 more
by Frank Shearar 25 Feb '05

25 Feb '05

Michael Rueger <michael(a)impara.de> wrote: > "Change Set: FixupAfterBigChange > Date: 24 February 2005 > Author: Yoshiki Ohshima > > Resolve the conflict and adds a few methods." <snip> Is someone marking these fixes (and the other recent fixes) as updates on BFAV? Does anyone mind if I do this? (not being a Harvester & all) frank ******************************************************************* This email and attachments (if any) must be swept for viruses before opening. Their contents may be confidential or privileged and are intended solely for the named recipient. If you are not the intended recipient and you have received this email in error you must not read or use this email and should notify RNID on: +44 (0) 20 7296 8282. RNID, Registered Office 19-23 Featherstone Street, London EC1Y 8SL No. 454169 (England, Registered Charity No. 207720) ********************************************************************

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[Q][balloon2D] is transparency supported?
by Baveco, Hans 25 Feb '05

25 Feb '05

When displaying polygons on a BalloonCanvas, setting the alpha of the fill-color apparently does not work. It changes the color though: when alpha approaches 1.0 the original color shows, when alpha approaches 0.0 the resulting color approaches black/opaque. Is this a known limitation, or a bug.... (the code looks like transparency should be handled). The final drawing is done in primitives, so a bit difficult to check.. Hans

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Reasons for Lint rules
by Frank Shearar 25 Feb '05

25 Feb '05

It occurs to me that it'd be nice to see a rationale for the Lint rules. Like, say, in a balloon text when you hovered over the title of the rule in the SmallLint Results window. For instance, "Uses the result of an add: message" - why is it bad form to do so? I mean, OrderedCollection>>add: does in fact return the object you added. Some of the rules are obvious like the 'Uses "size = 0" etc etc' rule, but some really aren't. At least, not to me. (And of course what's obvious to me isn't obvious to J. Random Squeaker). frank ******************************************************************* This email and attachments (if any) must be swept for viruses before opening. Their contents may be confidential or privileged and are intended solely for the named recipient. If you are not the intended recipient and you have received this email in error you must not read or use this email and should notify RNID on: +44 (0) 20 7296 8282. RNID, Registered Office 19-23 Featherstone Street, London EC1Y 8SL No. 454169 (England, Registered Charity No. 207720) ********************************************************************

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Lint sometimes gives near-useless info
by Frank Shearar 25 Feb '05

25 Feb '05

I decided to run Lint over my ImageMapEditor. It told me I had some "Variables not referenced [1]" in ImageMapEditor. So far, so good. What I'd really like to know, though, is WHICH instvar isn't referenced. The same applies to the result of "Instance variables not read AND written". So to my question: can Lint give answers this detailed? (Can it point out the actual offending variables?) If it can, how can I get my mitts on the results? If it can't, can we make it? If so, how? frank ******************************************************************* This email and attachments (if any) must be swept for viruses before opening. Their contents may be confidential or privileged and are intended solely for the named recipient. If you are not the intended recipient and you have received this email in error you must not read or use this email and should notify RNID on: +44 (0) 20 7296 8282. RNID, Registered Office 19-23 Featherstone Street, London EC1Y 8SL No. 454169 (England, Registered Charity No. 207720) ********************************************************************

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Re: Improving Squeak's Multimedia - Part 2 Followup
by Dean_Swan＠Mitel.COM 25 Feb '05

25 Feb '05

Brad, I agree with you regarding cleaning up the current audio classes (i.e. SoundPlayer>>sampleRate dependencies, etc.). Regarding Russell's ideas about a framework, examples would be Quicktime (Win/Mac), DirectSound(Win), PortAudio(Win/Linux), Jack(Linux), CoreAudio(Mac OS-X). I do think that we need to look at AbstractSound as Squeak's current audio framework. If we want insight into the original thinking behind AbstractSound, I'm sure John Maloney could help us out since he is the originator of much if not all of AbstractSound. I would be willing to act as a point of contact for this to keep John from being inundated with queries. I think Russell captured what my role can be here well: "low level stuff". For example, Russell's desire for an equalizer - I could easily provide some basic filters suitable for constructing a multiband parametric or graphic equalizer (sidenote - a "graphic" equalizer is probably more efficiently implemented using FFTs), and things of this sort. I could also probably do a simple overlap-add FFT framework, which is a useful foundation for many audio processing algorithms. I have implemented this kind of thing in C and assembly on many DSPs, so it wouldn't be hard to do the same in Smalltalk. I will try to spend some time going over what is already in Squeak for audio and come up with some outline of what I think needs work. Off the top of my head, I think there is a need for more consistency in how audio is handled in Squeak, and better support for multiple simultaneous audio streams (either recording or playback). In this respect, I think OS-X CoreAudio and DirectSound can prodvide some ideas. Yes I can do some coding, but I'm also willing to provide designs for people who have time to code but no low level DSP algorithm expertise. We may be able to accomplish more sooner that way. I don't have a lot of spare time to devote to this, so it might take longer for me to give any visible results if my deliverables are only working code. As an example, I think I've offered some inspiration to John Maloney for some things that are already in Squeak. I think we discussed the concept of the phoneme recognizer about 4 years ago in the context of a way to synchronize lip movements for the animated faces. John is the kind of guy who can take rough ideas like that and turn them into working code quickly. If we have somebody like that on your team, I think I can help with things like algorithm details. Regarding prioritizing my interests - nope. I view that as your job in the role of team/project leader. You've already expressed that your primary agenda item is audio, and that's good enough for me. I think we need to cover the basics of audio capture, playback, and file I/O, and I agree that these items probably largely amount to understanding what we have and cleaning it up a bit. From my POV, adding "cool low level stuff" would come next. -Dean

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Re: [FIX] FTPBinaryModeFix-nk
by Michael Rueger 25 Feb '05

25 Feb '05

ned(a)squeakland.org wrote: > from preamble: > > "Change Set: FTPBinaryModeFix-nk > Date: 26 January 2005 > Author: Ned Konz > > Between opening files as MultiByteFileStreams and not setting the FTP > servers into binary mode, we weren't getting reliable transfers of > binary data. > > This change set ensures that the same bytes end up on both sides of the > wire. But what if you want ascii transfer? This change set forces binary mode in all kinds of places (e.g. getFileNamed:) that are not necessarily meant to be binary IMO. Michael

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RE: [Q][balloon2D] is transparency supported?
by Baveco, Hans 25 Feb '05

25 Feb '05

Thanks Boris, indeed the code you give below works ok. I guess my problem is that I used a BalloonCanvas on a Form, and later displayed the form with the canvas that is default handed over to a morph, as argument of the drawOn: aCanvas method. I am a bit confused now, where and how is the canvas defined for a (any) morph, and how can I use a BalloonCanvas to do the final display when e.g. my morph is a submorph of another morph? thanks for your help, Hans I wrote: When displaying polygons on a BalloonCanvas, setting the alpha of the fill-color apparently does not work. It changes the color though: when alpha approaches 1.0 the original color shows, when alpha approaches 0.0 the resulting color approaches black/opaque. Is this a known limitation, or a bug.... (the code looks like transparency should be handled). The final drawing is done in primitives, so a bit difficult to check.. Boris answered: In class Translucent we read the following comment: An alpha of zero is transparent, and 1.0 is opaque. This conforms to your results. The following piece of code is in my opinion correct (in the sense that it displays the correct colors.) for all alphas between 0.0 and 1.0 | bc fs ramp | ramp := (0 to: 360 by: 60) collect: [:h | h / 360.0 -> (Color h: h s: 0.7 v: 0.8 alpha: 0.0)]. fs := GradientFillStyle ramp: ramp. fs origin: (10@10). fs direction: 600@300. fs radial: false. bc := BalloonCanvas on: Display. bc aaLevel: 2. bc drawPolygon: (Array with: 10@10 with: 500@300 with: 300 @500 with: 50 @ 300) fillStyle: fs borderWidth: 2 borderColor: ((Color red) alpha: 0.3). Greetings, Boris

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[BUG,FIX]True(Object)>>error:
by hmm＠heeg.de 25 Feb '05

25 Feb '05

Tried to load a package which defined selectors #true and #false. Due do the new literal vector interpretation (nil, true and false within #() are not transformed into Symbols) this gives an error when the class organizer tries to update its categories. Proposed workaround: transform nil, true and false into corresponding symbols in Categorizer>>changeFromCategorySpecs: ... 1 to: categorySpecs size do: [:i | | selectors | catSpec _ categorySpecs at: i. newCategories at: i put: catSpec first asSymbol. selectors := catSpec allButFirst collect: [:each | each isSymbol ifTrue: [each] ifFalse: [each printString asSymbol]]. selectors asSortedCollection do: ... Cheers, Hans-Martin ---- 25 February 2005 10:48:27 am VM: unix - a SmalltalkImage Image: Squeak3.7 [latest update: #5989] SecurityManager state: Restricted: false FileAccess: true SocketAccess: true Working Dir /home/hmm/squeak Trusted Dir /home/hmm/squeak/secure Untrusted Dir /home/hmm/squeak/untrusted True(Object)>>error: Receiver: true Arguments and temporary variables: aString: 'Instances of True are not indexable' Receiver's instance variables: true True(Object)>>errorNotIndexable Receiver: true Arguments and temporary variables: Receiver's instance variables: true True(Object)>>size Receiver: true Arguments and temporary variables: Receiver's instance variables: true Symbol(String)>>compare:with:collated: Receiver: #R Arguments and temporary variables: string1: #R string2: true order: a ByteArray(0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 2...etc... len1: 1 len2: nil c1: nil c2: nil i: nil iLimiT: nil Receiver's instance variables: #R --- The full stack --- True(Object)>>error: True(Object)>>errorNotIndexable True(Object)>>size Symbol(String)>>compare:with:collated: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Symbol(String)>><= SortedCollection>>should:precede: SortedCollection>>sort:to: SortedCollection>>reSort SortedCollection>>addAll: SortedCollection class(OrderedCollection class)>>newFrom: Array(Object)>>as: Array(Collection)>>asSortedCollection ClassOrganizer(Categorizer)>>changeFromCategorySpecs: [] in ClassOrganizer>>changeFromCategorySpecs: {[super changeFromCategorySpecs: categorySpecs]} [] in SystemChangeNotifier>>doSilently: {[result := aBlock value]} BlockContext>>ensure: SystemChangeNotifier>>doSilently: ClassOrganizer>>changeFromCategorySpecs: ClassOrganizer(Categorizer)>>changeFromString: ClassOrganizer(Categorizer)>>scanFrom: [] in StandardFileStream(PositionableStream)>>fileInAnnouncing: {[val := (self peekFor: $!) ifTrue: [(Compiler evaluate: self nextChunk l...]} BlockContext>>on:do: [] in StandardFileStream(PositionableStream)>>fileInAnnouncing: {[:bar | [self atEnd] whileFalse: [bar value: self position. self skipS...]} ProgressInitiationException>>defaultAction UndefinedObject>>handleSignal: MethodContext(ContextPart)>>handleSignal: MethodContext(ContextPart)>>handleSignal: ProgressInitiationException(Exception)>>signal ProgressInitiationException>>display:at:from:to:during: ProgressInitiationException class>>display:at:from:to:during: String>>displayProgressAt:from:to:during: StandardFileStream(PositionableStream)>>fileInAnnouncing: [] in SMDefaultInstaller(SMSimpleInstaller)>>fileIntoChangeSetNamed:fromStream : {[global newChanges: changeSet. stream fileInAnnouncing: 'Loading ' , newNam...]} BlockContext>>ensure: SMDefaultInstaller(SMSimpleInstaller)>>fileIntoChangeSetNamed:fromStream : SMDefaultInstaller>>fileIn SMDefaultInstaller>>install [] in SMLoader>>installPackageRelease: {[(SMInstaller forPackageRelease: aRelease) install. myRelease = self instal...]} BlockContext>>ensure: CursorWithMask(Cursor)>>showWhile: [] in SMLoader>>installPackageRelease: {[Cursor wait showWhile: [(SMInstaller forPackageRelease: aRelease) install...]} BlockContext>>on:do: SMLoader>>installPackageRelease: SMLoader>>installPackageRelease SMLoader>>perform:orSendTo: [] in MenuItemMorph>>invokeWithEvent: {[(selArgCount := selector numArgs) = 0 ifTrue: [target perform: selector] ...]} BlockContext>>ensure: CursorWithMask(Cursor)>>showWhile: MenuItemMorph>>invokeWithEvent: MenuItemMorph>>mouseUp: MenuItemMorph>>handleMouseUp: MouseButtonEvent>>sentTo: MenuItemMorph(Morph)>>handleEvent: MorphicEventDispatcher>>dispatchDefault:with: MorphicEventDispatcher>>dispatchEvent:with: MenuItemMorph(Morph)>>processEvent:using: MorphicEventDispatcher>>dispatchDefault:with: MorphicEventDispatcher>>dispatchEvent:with: MenuMorph(Morph)>>processEvent:using: MenuMorph(Morph)>>processEvent: MenuMorph>>handleFocusEvent: -- and more not shown --

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