Squeak-dev April 2005

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158 participants
287 discussions

vertical alignment in text
by José L. Redrejo Rodríguez 29 Apr '05

29 Apr '05

Hello, I am using Squeak to make an electronic book for maths, I have made some tools, and now I am adding the needed text to my "book", but I am having problems with it. The text is being written using latex, and them exported to html. I use scamper to see it, but I see this: http://www.itais.net/matrizmal.html when I should see : http://www.itais.net/matriz2.html. As you can see, all the formulas are incorrectly placed because scamper ignores the vertical alignment tags included in the html code. I am trying to add this feature, but for that I should access to TextLine and shift every character to be centered in the line. Scamper alreadys made the work of resizing the height of the line according to the image size. Does anybody have any idea of how to do it?, or even better, does anybody have a better idea to see latex written text rendered in Squeak correctly? Thanks in advance.

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[ENH] SFGridLayout
by karl.ramberg＠chello.se 29 Apr '05

29 Apr '05

from preamble: "Change Set: SGGridLayout Date: 25 April 2005 Author: Alain ? Hi all, This small changeset is for people who want to build a resizable UI, it has been tested in 3.6 and 3.7. There is a SFGridLayout class that resize its submorphs according to their properties. The grid properties has a size (initial, min, max) for each column and row, then each morph is given a position in the grid (in grid units) and a size (also in grid units, ie the number of columns and rows for width and height). See SFGridLayout class method example1. Some enhancements could be done (insets). There is also a (very simple) SFTextField class that is some kind of entry field ... :-o... for people who got strange text morph editors and layouts behaviors going/wrapping/editing reverse sometime, when resized or when it is not the time... This is still unfinished but could give somebody a start. Enjoy. Ideas & comment are welcome. Q: is there a better place to put this kind of thing , on swiki or squeakmap or is it ok here? Alain"!

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[ANN] ESUG supporting your own ideas to promote Smalltalk
by stéphane ducasse 29 Apr '05

29 Apr '05

hi guys You have an idea to promote Smalltalk? You want to show Squeak at an open-source forum? Organize a teacher days around etoy? ... Contact ESUG esug-info(a)esug.org with a proposal and a budget we can help and support you [ Do itWith: ESUG ] Open Source Smalltalks: http://www.squeak.org, http://www.gnu.org/software/smalltalk/smalltalk.html Free books for Universities at http://www.esug.org/sponsoring/promotionProgram.html Online Free Books at http://www.iam.unibe.ch/~ducasse/WebPages/FreeBooks.html

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TCP Server
by Daniel Salama 29 Apr '05

29 Apr '05

Hi guys, I want to build a server under Squeak that will be constantly listening to request on a particular TCP port. Once a request is received, it should do what it needs to do (whether it is to lookup something in a database and/or return some data back through the same socket) and then close that connection and get ready for the next one. The problem I see is that I expect to receive anywhere between 30-120 connections per second. The connections are very short (may be 1-2 seconds max). If I were doing it in Java, I would spawn a child process to handle a particular connection while the main server continues to listen on the socket. How would you recommend I approach this in Squeak? I know we have talked to great extent about the real need of multi-threaded/process applications and the fact that they may not really be needed in Squeak (or Smalltalk for that matter), but I don't see any other way to make a Squeak box scale to this load. To make things even worse, I don't even know which class to look at to get started. Any help and suggestions would be greatly appreciated. Thanks, Daniel

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Re: Dorado bytecodes per second
by Tim Rowledge 28 Apr '05

28 Apr '05

Jecel Assumpcao Jr <jecel(a)merlintec.com> wrote: > By running the benchmarks for the "green book" and doing a lot of rough > extrapolations, my guess is that the Dorado would get between 200K and > 400K bytecodes/sec. That is pretty much what I remember as the claim for Dorados. > That is better than what I got running Squeak 1.16 > on a 33MHz 486 machine which was some 13 years newer, but far below what > I expected. My impression was that the old 20MHz ECL computer was able > to reach a peak of one bytecode per clock > which would indicate a number around three or four times better. I was under the impression that the Dorado was a 70nS cycle machine, ie 14MHz or so. And many bytecodes would take more than one cycle of course. > > After looking at a bunch of numbers my conclusion is that Squeak is > usable on machines capable of at least 20M bps. If my guess above is > corrent, that would be around 60 Dorados. My Iyonix does about 35mbc/s on the dumb-bytecodes test and about 20 Dorado in the greenbook tests - with a tiny cache (don't imagine Dorado had much of one either!) the longer prims etc suffer relative to a monster watt-sucker like a pentium. My first ARM system was 4 mips (no cache at all, not even instruction pre- fetch) with 4Mb of slow ram. It scored 27% Dorado but was thoroughly usable as a UI. It could scan and layout nice formatted text in pretty fonts faster than the contemporaneous PCs running Aldus (for example) could do. The ARM 3 upgrade gave 10mips and 127% on the same motherboard/ram. The Iyonix is 600MHz with larger caches and fast memory but only scores 15 times faster, an indication of how much there is still to get out of a simple interpreter. > If both estimates are true, > then I wonder if our definition of "acceptable" has changed or if Squeak > has become less efficient. Certainly Morphic is always being blamed for > slowing everything down, so the latter is probably the case. I suspect it is largely the rather poor UI responsiveness that is the problem. In MVC on my machine the UI flies, menus are instant, browser bang open etc. In morphic every thing is really slowwwwwwwwww Some of it is simply that morphic is sloshing large bitmaps around with high colour depths. Some of it is probably some dumb algorthmic error that nobody has spotted yet. tim -- Tim Rowledge, tim(a)sumeru.stanford.edu, http://sumeru.stanford.edu/tim Useful random insult:- Useful as a hip pocket on a T-shirt.

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REMINDER: Harvesting Party Friday April 29th 21:00 GMT
by Ken Causey 28 Apr '05

28 Apr '05

Just a reminder that the next Harvesting Party will take place between 21:00 (9 PM) GMT Friday April 29th and 01:00 (1 AM) GMT Saturday April 30th, 2005. As usual we will meet in #squeak on irc.freenode.net. More information about the #squeak IRC channel can be found at http://people.squeakfoundation.org/article/7.html Information about the Harvesting Party idea can be found at http://people.squeakfoundation.org/article/29.html If you have the time please attend and work toward the future of Squeak. The next seven parties are scheduled for 01:00 (01:00 AM) GMT Wednesday May 04, 2005 05:00 (05:00 AM) GMT Sunday May 08, 2005 09:00 (09:00 AM) GMT Thursday May 12, 2005 13:00 (01:00 PM) GMT Monday May 16, 2005 17:00 (05:00 PM) GMT Friday May 20, 2005 21:00 (09:00 PM) GMT Tuesday May 24, 2005 01:00 (01:00 AM) GMT Sunday May 29, 2005

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Re: Making a server.
by e4ward 28 Apr '05

28 Apr '05

On 4/28/05, Avi Bryant <avi.bryant*gmail.com*4d8nfbcdu5*reider.net*798*iden*3(a)reply.e4ward.com> wrote: > On 4/28/05, François THIMON <thimof(a)iutc3.unicaen.fr> wrote: > The simplest way to get a server running is to install the KomServices > package from SqueakMap, subclass TcpService, and override #serve:. > Look on the class side to see how to start and stop a service on a > particular port. > It's also good example code if that's what you're looking for. And see Avi's own REPLServer package for an excellent example of subclassing TcpService. You can just use telnet as the client.

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OODB Collections
by Daniel Salama 28 Apr '05

28 Apr '05

I'm wondering if anyone can shed some light as to which of the standard collection classes are "OODB safe"? By this, I mean that when large collections of objects are stored in an OODB, they will be efficiently accessed via Squeak without having to, necessarily, load the entire collection in memory. One example of these are, as were recommended earlier to me, the BTree classes by Avi. However, looking at Magma, I see it does have some support for large collections. Also, OmniBase has some collection classes of its own. But, questions like: at which point does it become important to consider optimized collections? or is it safe to use Dictionaries or is there a more efficient collection? I don't know. Just looking for general advise on proper usability of collection classes and their persistency (sorry for being so vague). Thanks, Daniel

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[FIX] WebpageMorphFix
by karl.ramberg＠chello.se 28 Apr '05

28 Apr '05

from preamble: "Change Set: WebpageMorphFix Date: 25 April 2005 Author: Karl Ramberg Adds a method to WebPageMorph so horizontal scrollbars pop up"!

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Making a server.
by François THIMON 28 Apr '05

28 Apr '05

Hi again. I posted a question here a moment ago. It was about how to make a socket server in squeak. Basically it said that the I could use a kind of cross-recursivity or an infinite loop to re-call the waitForConnectionFor... method. But do you think there is a "standard" way to do this? Or shall I just use a mere infinite loop and each time tell the function to wait the biggest duration available (ie the largest integer I can write in this language). Thanks in advance for helping.

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