March 2005 - Oberon - mailman3.inf.ethz.ch

Oberon Database
by Dan Parnete 19 Sep '05

19 Sep '05

Hello, I have read this list archives, the documentation inside the distributions, some extra found on the web and I understood. Database is a Tabu word in this community, and is better to not talk about. There is no trace in any distribution (excluding the commercial BlackBox) and the new Bluebottle project doesn't intend to implement one. Ok. It's a choice of live. But don't tell me none of you never needed to put some data altogether. I can't believe nobody extended at list the Library code to more flexible collections management. I saw some database projects started long time ago. Where are this implementations? In other words: if I need a database, have I write it myself? Dan

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XML.TraverseProc
by Dan Parnete 24 Mar '05

24 Mar '05

Hello, Is it any reason the XML.TraverseProc could not be DELEGATE?. I find useful to have it as object's method. Regards, Dan Parnete

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Italian keyboard table
by Dan Parnete 18 Mar '05

18 Mar '05

Hello, I have added an Italian table to the Keyboard.Mod, but I mess two symbols: - Italian Lire symbol (the same as UK pound) - Euro symbol Could anybody tell me the codes BB accepts for this? Thank you, Dan Parnete

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JPEG2000 in Crazy Aos Release
by keller＠creacare.com 17 Mar '05

17 Mar '05

I did an attempt to port JPEG.Mod to Bluebottle. Unfourtunatly I was not successful. Let's put it this way: JPEG.Mod is not an example for good software design. Probably it was copied from some C Code. I was not able to get rid of the grey Oberon Box, to get rid of the al variables and to switch from files to streams. This module has to be redone from scratch. --Daniel >Cool. But what about normal JPEG files? You >know, "jpg", "jpeg"? I can open them under >the "System 3" window, but not under AOS >proper. > >Regards, > >John M. Drake > > > >__________________________________ >Do you Yahoo!? >Yahoo! Small Business - Try our new resources site! >http://smallbusiness.yahoo.com/resources/ >-- >Oberon(a)lists.inf.ethz.ch mailing list for ETH Oberon and related syst >ems >https://www.mail.inf.ethz.ch/lists/listinfo/oberon

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Re: [Oberon] JPEG2000 in Crazy Aos Release
by John Drake 17 Mar '05

17 Mar '05

--- Pascal Lehmann <palehman(a)student.ethz.ch> wrote: > Hi Patrick, > > If the extension for JPEG2000 files is entered in > the FileExtension Section > of AosConfig.XML you should be able to click any > JPEG2000 within the > FileBrowser and it should open with WMPicView. I > think the extension "jp2" > should be already included in the AosConfig.XML but > I cannot verify as I'm > not on a BB machine right now. Note that there are > plenty of other > extensions used for JPEG2000 files like j2c, j2k, > jpx, etc. so you might > need to add those in AosConfig.XML as well. > You can take a look at WMPicView.Mod about how to > deal with images, although > since the introduction of decoders you can simply > call WMGraphics.LoadImage > myImage.jp2 and it should use the correct > Image-Decoder if there is an entry > in the Decoder Section in AosConfig.XML. > > Greets > Pascal Cool. But what about normal JPEG files? You know, "jpg", "jpeg"? I can open them under the "System 3" window, but not under AOS proper. Regards, John M. Drake __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/

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JPEG2000 in Crazy Aos Release
by Patrick.Hunziker＠unibas.ch 17 Mar '05

17 Mar '05

Great to see a JPEG2000 decoder emerge in the crazy release ! Browsing through the source code, I have not yet found an "entry point" to try things out - is there a simple example available ? Greetings Patrick ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

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Re: Gadgets for SyntaxConstrainedEditor
by easlab＠absamail.co.za 17 Mar '05

17 Mar '05

On Mar 6, 2005, at 12:23, easlab(a)absamail.co.za wrote: > > Why should we be punished to pick chars off a keyboard, a-la-1965, > > when we could pick structures which are constrained to be syntactically > > correct at each stage of the refinement process ? From: Bob Walkden <bob(a)web-options.com> wrote: > In googling for Syntax-Directed and Structured Editing, I found > section 2.3 "Structured Text Editors" of R. Miller's thesis > _Lightweight Structure in Text_, which offers some insights into the > trade-offs involved. > > http://www-2.cs.cmu.edu/~rcm/papers/thesis/ch2.pdf Yes he goes into the subjectively perceived value to the user. It's too easy to make something which 'works' but turns out to be of little perceived use. <digression> I had to go to linux [from my normal n-o] to read the ch2.pdf. pdftoascii [or whatever - BTW. the basis of this thread is to be able to recognise instead of remember - get it?] produced the corresponding text file. I can't understand/tolerate when people use pdf when the contents is purely text ?! The sizes are seen below: C:ch2.pdf 15.03.2005 19:13:54 64090 C:syntax.edt 15.03.2005 19:54:38 34306 I'm thinking that pdftoascii could easily be ported from linux to n-o. And a general tool [which would boost n-o's tool-set] which helped translate C to oberon, would be great. Such a tool could be closely related to this 'SyntaxConstrainedEditor' concept. Another fact which Miller's thesis acknowledges is what I call 'soft translation': contrary to a compiler which gives a perfect translation; a tool which gives a 'bablefish-like' output which is later cleaned-up manually is of potential value. eg. google. So if the tool was very general, not only a syntax directed editor for one language, but offering: * show valid set of selections at present state, * allow picking a big-chunk, instead of single chars it could be modified/extended for many tasks. Wasn't this the reason why spread-sheets were early killer-apps ? <end digression> > why not just copy it from a template file? > > Blackbox has "File | Open Stationery...", which you use to pick an > existing file. The system copies into a new, anonymous text which you > can edit and have to save with a new name. Simple. Well yes, I think mature n-o users already use templates. IMO what I'm advocating has 2 aspects: 1. menu: recognise instead of having to know/remember; 2. grab big-chunks: which templates allows. So templates doesn't give the 1st important facility; but n-o 'Tools' does. In fact why I'm so enthusiastic about the concept, is that existing n-o already offers [and confirms that it's a winner] many of the facilities, compared to a pure command line interface. Ben wrote:- > A few (6?) years back I did some thinking along these lines (also > hittinug upon using Gadgets as a convenient mechanism for implementing > it). I finally dropped that line if inquiry after deciding, in light > of what I'd been able to research on the subject, that the gains > wouldn't justify costs (in complexity of implementation for example). > > (Despite this I have to admit that it's an idea that's never quite > lost its appeal for me.) 'the gains' are subjective. I've got a long time worry/mystery: DOS & linux are intolerable for me without Norton Commander & the linux clone mc. Yet I'm aware that most linux users prefer to remember/recall and type-in absurd command strings instead of the see-select-do-confirm of mc. They can't all be 'wrong' ? My research exposed plenty criticism for the 'spread-sheet' programming method; and we know that syntax-directed-editors have gone out of favour. I just can't understsnd it. So the question/answer seems to be psychological and not technical ? Jack Johnson wrote:- > I've had this idea for a while for a Forth environment for handhelds > that turns the tokens into real tokens, so you can drag & drop any > element from the dictionary into a line of code without needing to > tap/type/write it in, limiting the real entry to just numbers or names > that aren't yet in the dictionary. > > Having it intelligently follow a syntax could continually keep the > pick lists or palettes to a minimum for the limited screen real > estate. > > But then you envision the end result and wonder why not just > use/implement Gadgets or a Smalltalk environment (Squeak) to > implement a similar limited-input programming environment > for PDAs. I think the Forth mindset doesn't promote economy of labour ? I guess Smalltalk had all these labour saving facilities, but was [at the time] hardware expensive. OTOH Gadgets are here, now, free. ...to be continued ... == Chris Glur.

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Partitions.Show, Partitions.Create in Aos.
by shark＠gulfnet.sd64.bc.ca 17 Mar '05

17 Mar '05

In case this problem interests anyone ... Partitions.Show detail ~ on a Kingston USB memory reports this. Disk: USBSCSI0, 245MB = 502784 * 512, removable, CHS: 0*0*0, Usb Transparent SCSI device, mntcnt=0 USBSCSI0#00 0 502784 245MB --- (Whole disk) USBSCSI0#01 51 501789 245MB --- (Free) Partitions.Create USBSCSI0#01 245 ~ reports this in the System.Log. GetGeometry: error 0 Regards, ... Peter http://carnot.pathology.ubc.ca/

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Re: [Oberon] Gadgets for SyntaxConstrainedEditor
by John Drake 16 Mar '05

16 Mar '05

--- Thomas Frey <frey(a)inf.ethz.ch> wrote: > In the Bluebottle editors as well as in the Oberon > Editors you can use a > configurable and parametrizable macro system for > writing this kind of > boring code. I'm surprised that no one's mentioned PET (Programmers Extended Text editor) in this discussion. Out of the box it can automatically capitalize Oberon keywords, itallicize comments ect. ftp://ftp.inf.ethz.ch/pub/ETHOberon/Contrib/Pet/ It works with both Windows and Native Oberon System 3. It seems that it shouldn't be to difficult to extend it to do some of the things being proposed here. Regards, John M. Drake __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/

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How to identify AOS error codes
by Stefan Salewski 16 Mar '05

16 Mar '05

Hello, I was successful setting up network by filling fields in Aos.Par. But default setup using DHCP failed, while it is working in Linux and Windows. First I get error code 3502. In AOS-Sourcecode I found that 3502 means timeout error. With incomplete filled fields in Aos.Par I get a new error code, 3903 if I remember correctly. Is there a central list of error codes or a recommended method to map error codes to modules? Best regards Stefan Salewski

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