Squeak-dev March 2001

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139 participants
508 discussions

Squeak on tinies (was Re: Squeak on iPaq-Linux Update)
by danielv＠netvision.net.il 27 Mar '01

27 Mar '01

I'm curious what people are using Squeak for on PDA's, and how. I chose the tiniest fonts I could find and still the basic tools seemjust too big to fit well in 320X240... I mean Browsers, the PDAMorph, and Celeste, which I've tried... How do you do it? Screen shots would be appreciated... Kevin Fisher <kgf(a)golden.net> wrote: > Hi Folks: > > For those who are interested in running Squeak on handheld.org's iPaq-Linux > distro, I've got a quick update. > > My previous 'howto' page hinged on the fact that iPaq-Linux was using > CRAMFS, a read-only compressed flash filesystem and a read-write RAMdisk. > This required some 'creative' placement of executables and images, as well > as being rather memory inefficient. > > But no longer! As of the release of Familar 0.03 the CRAMFS is gone, > and JFFS2 is in place...JFFS2 being a clever journalling flash filesystem > that is totally read-write. This makes life much easier when trying > to squeeze more space out of the iPaq. As soon as minnow comes alive > again I'll hopefully update my howto page..life is much easier with > JFFS2. Basically you can treat the whole flash filesystem like a > 'normal' filesystem now...plus the RAMdisk filesystem is still there, too. > > Also, Squeak has the dubious honour of being able to hard-crash Linux on > the iPaq...not sure what is happening there, but I managed to get half > a stack dump off the serial port before everything locked. The only > thing I'm certain of is that it is the Squeak VM executable that is > crashing the kernel...but I need to make it happen again so I can get > a full crash dump off the console. (The Squeak in qustion is the > Unix 3.0 beta 2 stuff, although I suspect 2.9a of doing the same > thing.)

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A couple of EToys questions
by James Howe 27 Mar '01

27 Mar '01

I have a couple of questions concerning EToys. First, when you create a sketch morph, is there a way to change the heading of the morph without changing the orientation of the morph itself? My son was using Squeak and drew a car. He drew it horizontally, i.e a side view of the car. We then hooked the car up to a joystick and were surprised (initially) that the car went "up" when we expected it to go "forward". Of course, the reason it went up was because it's heading was initially set to 0. Once we identified the problem, I wanted to somehow change the heading to be 90 without having the graphic rotate as well, however I didn't find a way to do this. Is there a simple way to do this from either a menu option or from the viewer framework? The other question I have concerns the use of the keyboard within EToys. One of the things we wanted to do was create a way to control our car from the keyboard. For example the left arrow might make the car go forward and the right arrow might make it go backward. Alternatively, some keyboard character might make the car go forward while we use a steering wheel sketch morph to turn the car. Is there some way to use keyboard input from within a player script? Thanks.

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[Bug] Broken MIDI keyboard
by Mark Guzdial 27 Mar '01

27 Mar '01

The PianoRoll keyboard for editing MIDI in 3.1 is broken -- it works, but everything is right shifted. I suspect that it's just an AlignmentMorph vs. TableLayout problem, but since I haven't figured out TableLayout myself yet, I didn't try to fix it. Mark -------------------------- Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280 Associate Professor - Learning Sciences & Technologies. Collaborative Software Lab - http://coweb.cc.gatech.edu/csl/ (404) 894-5618 : Fax (404) 894-0673 : guzdial(a)cc.gatech.edu http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html

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Browser Plugin 3.0 update
by Michael Rueger 27 Mar '01

27 Mar '01

Hi all, I uploaded new installers (Win, Mac) for the browser plugin to: http://www.squeaklet.com/NPSqueak/download.html You can also directly use this link: http://www.squeaklet.com/NPSqueak/plugin/detect/detect.html?plugin/launch.h… If you - already have a plugin image - want to use the most current Squeak image - already have a recent version of the plugin installed you only need to download the plugin update, which does not contain an image. Michael P.S. Is there 3.0 Linux plugin yet or does this one http://wwwisg.cs.uni-magdeburg.de/%7Ebert/squeak/plugin/npsqueak-i386-linux… still work?

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Squeak Foundation?
by Elzbieta Chludzinska 27 Mar '01

27 Mar '01

I've heard tell of an announcement at the Smalltalk Solutions 2001 Conference of a Squeak Foundation to be supported by Disney, IBM and Dave Thomas (whatever that means). Is this correct and does anyone have more info? I assume this support Squeak like the Apache Foundation supports Apache! Elzbieta

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Re: A couple of EToys questions
by Bob Arning 27 Mar '01

27 Mar '01

On Mon, 26 Mar 2001 17:34:22 -0500 James Howe <jwh(a)allencreek.com> wrote: >I have a couple of questions concerning EToys. First, when you create a >sketch morph, is there a way to change the heading of the morph without >changing the orientation of the morph itself? Sure. Use the blue halo handle to rotate the sketch a bit. This will cause some new handles to appear in the center of the sketch. Drag the green arrow to point to the correct forward direction for the sketch. Cheers, Bob

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Re: excited newbie:)
by Lex Spoon 27 Mar '01

27 Mar '01

> But I have a question too: The workspace variables seem to have = > dissapeared. I'm using globals at the moment, because I haven't got a = > better idea. > > They work for me.... If I do "x := 3", and print "x", then "x" is 3. Can you try them again from a fresh image? -Lex

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Re: Are morphs the components of Squeak - a la JavaBeans?
by Roel Wuyts 26 Mar '01

26 Mar '01

About the interface question: suppose we define an interface for Smalltalk-beans (based on conventions of course, maybe the current Javabeans interface can be used as inspiration for things to include/omit). Couldn't this be enough to propel us already ahead ? We could make a swiki page describing the interface, and we could try writing components that adhere to this interface. Such components should be interoperable. On 26/03/01 19:13, "Michael Rueger" <m.rueger(a)acm.org> wrote: > > > Elzbieta Chludzinska wrote: >> >> Is it reasonable to make an analogy between morphs and Java beans - Java's >> components? Is there a component framework for Squeak? >> >> The reason I ask is I know it'll be asked during some presentations I'll be >> making in my effort to "sell" Squeak for a project I'm working on. > > If you want to be provocative you could state that every Object in > Smalltalk is a Java Bean (reflectuve capabilities, late binding, default > gui for parameters (inspector), ...) > > Beans are not necessarily graphical components, so restricting the > comparison to morphs is somewhat artificial anyway. Especially when used > in the context of e.g. Java server pages Java beans are nothing more > than objects with some reflective and late binding capabilites (e.g. > properties). > > In my understanding one thing is missing though in > Smalltalk/Squeak/Morphic, and that is the definition of an interface > definition (not meaning gui here!) (in the broadest possible sense). > > Please don't let's start a war here over which is better, I'm just > trying help with a "neutral" comparison. :-) > > Michael

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[BUG] Socket semaphore corrupted (Unix VM)
by ajh18＠cornell.edu 26 Mar '01

26 Mar '01

Socket>>waitForDataUntil: does not wait on the readSemaphore. Rather, "readSemaphore waitForTimeoutMSecs:" falls through causing the outer while loop to continously run until the deadline is reached. Needless to say, this takes up much of the CPU. I do not get this problem with the Windows VM, only with the Unix VM (in Linux). To recreate the problem bring up two images. In Image2 bring up the Transcript and edit Socket>>waitForDataUntil: adding (Transcript show: 'waiting '.) as the first line in the whileTrue: loop. Then execute the following. Image1> Socket initializeNetwork. Image1> Socket new listenOn: 2001. Image2> Socket initializeNetwork. Image2> s _ Socket new connectTo: (NetNameResolver addressFromString: '127.0.0.1') port: 2001. Image2> s waitForDataUntil: Socket standardDeadline. You should see 'waiting waiting ...' streaming across your Transcript until the deadline is reached 45 seconds later. I suspect this semaphore problem is also the cause of my first Socket bug report entitled "[BUG]Socket waits unnecessarily in linux" (March 23, 2001). Image version: Squeak3.1alpha of 27 February 2001 latest update: #3848 VM version (3.0pre2): Squeak3.0 of 4 February 2001 [latest update: #3446] for: unix Since, this bug is platform specific it must be in the unix src. I would try to fix it myself but I am no Unix expert. Thanks, Anthony

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[FIX] ButtonGradients-nk
by Ned Konz 26 Mar '01

26 Mar '01

from preamble: "Change Set: ButtonGradients-nk Date: 26 March 2001 Author: Ned Konz It's possible to add a gradient fill to a button. But the first time you press it, the gradient becomes a solid color. This change set fixes that to allow permanent gradients on buttons. Whether or not having gradients on buttons is useful or attractive is another subject..."!

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