November 1999 - Zope

python -O
by Oleg Broytmann 01 Nov '99

01 Nov '99

Hello! Usually I use Zope in PCGI-only mode (no ZServer), so Apache starts PCGIPublisher, if it's not loaded. PCGI resource file (Zope.cgi) uses "python" as the name for the python binary. Recently I tried to use "python -O", stopped Zope and asked Apache to restart it. Zope didn't came up, and I got "temporary unavail". I removed option "-O", and Zope started up ok. Question: What are pros and cons to run Zope under "python -O"? If there are pros, how can I achive that? Oleg. ---- Oleg Broytmann Foundation for Effective Policies phd(a)phd.russ.ru Programmers don't die, they just GOSUB without RETURN.

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Re: [Zope] Zope.org site text should wrap
by Thomas B. Passin 01 Nov '99

01 Nov '99

From: Martijn Pieters <mj(a)antraciet.nl> >At 21:11 29-10-99 , Thomas B. Passin wrote: >>Many pages on the zope.org site are annoying to read because they don't >>word-wrap. This is probably caused by a width="100%" attribute in the main >><table> tag. On most pages with this problem, getting rid of the widh="100%" >>lets the text wrap like it should. >> >>Whoever is the template custodian, please let our text wrap! >> >>Thomas Passin > >This has nothing to do with the width=100%, but everything with the use of >the PRE tag for examples. Text marked up with PRE will not wrap, therefore >pushing the margins, which in turn widens the table cell, which in its turn >makes _all_ text wrap around at this new width. > >PRE tags are automatically added when using example code in Structired Text >documents. > >-- I realize that PRE blocks do what you say, but I meant something else. Look at the main www.zope.org page. Drag your browser window until it is too narrow for the text. At some point as you make the window more narrow, the text in the right column will be cut off rather than wrap. Also notice that the navigation items in the upper right go off-screen to the right rather than wrap. It is this truncation that is annoying. Remember too, many people use 800 X 600 resolution on their browser, so pages appear much wider than with higher resolution. These people will be much more likely to encounter this behavior. In this particular case, the problem might not be with a table width per se, but could be with some images whose width is specified to be too large. Or maybe a combination. You can verify the role of the WIDTH attribute in preventing wrapping in tables by saving the Zope home page as a file. You can make the right-hand column and navigation items wrap better by making this change near the start of the <BODY>: <BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#000066" VLINK="#606060" TOPMARGIN="0" LEFTMARGIN="0" MARGINWIDTH="0" MARGINHEIGHT="0"> <BASEFONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="2"> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%"> <TR> <TD WIDTH="10" BGCOLOR="#000000" ALIGN=CENTER> </TD> <TD COLSPAN="2" BGCOLOR="#6699CC" VALIGN="TOP" WIDTH="300"><A HREF="/"><IMG SRC="/Images/zopelogo.jpg" ALT="Z Object BORDER="0"></A></TD>  <TD BGCOLOR="#6699CC" VALIGN="TOP" ALIGN="RIGHT" WIDTH="99%" CLASS="welcome">  <TD BGCOLOR="#6699CC" VALIGN="TOP" ALIGN="RIGHT" xWIDTH="99%" CLASS="welcome"> Changing from "WIDTH" to "xWIDTH" inactivates the width statement. Reload the page. Now start making the browser window more and more narrow. You will see that the navigation section still wraps until the window gets much narrower than before. Also, the middle column now can wrap. Unfortunately, there still comes a time when the right column and navigation items stop wrapping and become truncated. I haven't yet been able to find what causes this. It must be the specification of some width or height, or maybe several interacting ones. Other Zope pages act in a similar way, but it often is not so noticable because one tends to look at the text in the middle rather than the navigation. But some pages with wide text or several text columns are more likely to get truncated. The old zope site has this problem more severely. Maybe there are too many interacting parts on the pages to completely solve the problem, but I would really appreciate some degree of improvement. Even the small change above makes the pages better for me, and, I am sure, many others too. Tom Passin

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variables
by Jim Sanford 01 Nov '99

01 Nov '99

Here is the way that works for me to set and change variables: (This is a snippet from in use production code. It calculates a running total for items on an order.) ... <dtml-call "REQUEST.set('otot',0)"> <dtml-in "Query.OrderItems()" sort=sord> <dtml-let n_otot="otot + (quantity*unitprice)"> <dtml-call "REQUEST.set('otot',n_otot)"> </dtml-let> ... </dtml-in> ... </td><td align="right"><b>Total:</b></td><td><dtml-var otot fmt=dollars-and-cents> ... __________________________________________________________________ Jim Sanford ^ Database Engineer ^ ^ ^ Accelerated Technology, Inc. ^ ^ 720 Oak Circle Drive East ^ ^ ^ Mobile, AL 36609 ^ ^ ^ Voice: 334-661-5770 fax: 334-661-5788 ^ ^ E-Mail: jsanford(a)atinucleus.com Web: http://www.atinucleus.com Source Code, No Royalties, Any CPU...It just make sense ! __________________________________________________________________

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RE: [Zope] ZServer header and Netscape borwser
by Brian Lloyd 01 Nov '99

01 Nov '99

> > > > I installed Zope 2.0.1 for Linux RH 5.2 with python 1.5.2. > Everything > > works good, however when I visit the site with Netscape Communicator > > 4.61. I get to see the HTML source code instead of the page... > > I noticed the same thing some time ago.. > Seems like Zope delivers the pages as html/text if they start with > <HTML>, but uses application/octet-stream when they start with a DTD > like > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > "http://www.w3.org/TR/REC-html40/loose.dtd"> ) .. > I am not entirely happy with this, as the standard requires > me to have a > DTD, but i have found no other solution than to avoid it alltogether, > atleast while i am still in a development phase.. > If anyone knows of a solution that allows me to keep the DTD, i'd be > happy to hear about it... I've checked in a change for 2.1.0 that will fix this - in the meantime, you can always use "explicit headers" in your dtml: <dtml-call "RESPONSE.setHeader('Content-Type', 'text/html')"> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ... Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Test message
by zope＠sesgroup.net 01 Nov '99

01 Nov '99

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Convert URL to object
by Itamar Shtull-Trauring 01 Nov '99

01 Nov '99

I have an attribute Link that contains the URL of an object (e.g. "/blah/foo"), and I want to do something like <dtml-with Link> .... </dtml-with> which of course doesn't work. How to I convert a URL into a reference to an object? -- Itamar - itamars(a)ibm.net ---------------------------o----------------------------------------------o Perl/Gimp Greeting Cards | Trust? Ha! The US dollar is backed by ICBMs! | http://www.sealingwax.com | --Anonymous Coward, Slashdot |

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Problems pasting into ZClass
by Itamar Shtull-Trauring 01 Nov '99

01 Nov '99

Why does pasting into a CatalogAware ZClass (not an instance, the ZClass itself) gives me: Error Type: AttributeError Error Value: REQUEST Traceback (innermost last): File /itamar/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /itamar/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 179, in publish File /itamar/Zope-2.0.1-linux2-x86/lib/python/Zope/__init__.py, line 201, in zpublisher_exception_hook (Object: ElementWithAttributes) File /itamar/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 165, in publish File /itamar/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_pasteObjects) File /itamar/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: manage_pasteObjects) File /itamar/Zope-2.0.1-linux2-x86/lib/python/OFS/CopySupport.py, line 225, in manage_pasteObjects (Object: ElementWithAttributes) File /itamar/Zope-2.0.1-linux2-x86/lib/python/OFS/ObjectManager.py, line 264, in _delObject (Object: ElementWithAttributes) File /itamar/Zope-2.0.1-linux2-x86/lib/python/Products/ZCatalog/CatalogAwareness.py, line 129, in manage_beforeDelete (Object: CatalogAware) File /itamar/Zope-2.0.1-linux2-x86/lib/python/Products/ZCatalog/CatalogAwareness.py, line 186, in unindex_object (Object: CatalogAware) File /itamar/Zope-2.0.1-linux2-x86/lib/python/Products/ZCatalog/CatalogAwareness.py, line 156, in url (Object: CatalogAware) File /itamar/Zope-2.0.1-linux2-x86/lib/python/OFS/SimpleItem.py, line 316, in absolute_url (Object: CatalogAware) AttributeError: (see above)

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Re: [Zope] Obtaining URL of Object w/Non-Var Name
by Jeff Rush 01 Nov '99

01 Nov '99

On Fri, 29 Oct 1999 20:01:15 +0200, Martijn Pieters wrote: >At 19:19 29-10-99 , Jeff Rush wrote: >>Alright, what's the trick to be able to retrieve the URL of a Zope object >>via DTML whose id has blanks or punctuation in it? For example, >>in a normally-named object called 'site_css', I'd do: >> >>Ex. 1 >> <LINK REL=stylesheet HREF=<dtml-var "site_css.absolute_url()"> TYPE="text/css"> >> ><LINK REL=stylesheet HREF="<dtml-var "_.getitem('site.css', 0).absolute_url()">" TYPE="text/css"> > >This retrieves the object from the namespace without calling it. Thanks Martijn -- that works fine! At the risk of sounding dumb, I don't quite understand it -- why does the 0th array element within object 'site.css' contain a pointer to the object itself and how would a Zope developer know this? I've been thru the Zope source and haven't come upon that particular construct. And naturally, what resides at other offsets? Oleg Broytmann wrote that doing the say with offset 1 would result in a call to the object ??? -Jeff Rush

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Re: [Zope] Announce: Where's the zope? => SVG
by Jason Cunliffe 01 Nov '99

01 Nov '99

>Not to mention that extremely cool work being done in gill, the Gnome >illustration program (not even alpha, but you should see the demos). Looks >like SVG will be a very wide-spread format in Gnome apps. >And Macromedia is a really bad company - I suffered for many years with >Director. They bought Flash, BTW - it wasn't developed by Macromedia. >Of course, SVG is not supported in ANY of today's browsers. Thanks. I will check out 'gill'.. Yes indeed. There are many Lingo(Director) programmers who dspote Director's own power and virtues, are now disenchanted by MM and would like to see a _viable_ openSource cross_platform replacement. When MM bought Flash it was called futureSplash. To their credit Falsh has been greatly improved since that first download. FLash can be embedded very nicely into Director applications including Shockwave. Flash4 can also be embedded into Apple's Quicktime 4 which in turn can be now embedded in Adobe's new version PDF..[I have not personally tested this last option yet]. There is work being done on Java SVG player. I think this runs now - but will check and confirm. Wither way, it appears that very soon we will see players and broswer compatible solutions. The neglect of vector graphics by the web browser developers has to be one of the great mysteries of web development history. It is riduculous to take structured data and reduce to banwidth_heavy raster graphics which have 0 semantics. Duh. But finally peipke seem to be waking up. on erason is becaeu they can see for themselves the efficiency of FLash. But also the frustrations of a super fast format like that which does not possess universally accessible object semantics... Enter SVG, gil, XML-??? My main point of these posts is that comprehensive XML-based multimedia would be a very powerful and wonderful thing. And Zope[+Python] should be a brilliant component of that. One application I have stongly in mind is for 'smart-maps': animated hyperlinked maps - WEBGIS/WEBCAD/WEBWHITEBOARD Does anyone remember the original NCSA 'XCollage' ??. http://www.seismo.unr.edu/ftp/vis/color/sites.html The beauty of an XML-based multimedia system with a Zope object system is that, for example, all the 'web map objects' of a distributed webGIS can be represented by DTML Methods and sets of these which pass messages to each other and thereby modify attributes, state etc. If you look at the scale, scope and complexity of WebGIS it is crying out for such an approach. The mechanisms in Zope whereby hierarchy and acquisition are bi-directional, allowing context to affect behavior is perfect for implementing an open multimedia webGIS. This is a killer app IMO, but requires significant elements to be in place. I detect all the ingredients now, but there is work to be done before we can have dinner! If anyone here considers this thread is off-topic, but is intersested to discuss privately in more detail then please contact me. - Jason ------------------------------------------------- Jason Cunliffe <jasonic(a)nomadicsltd.com> NOMADICS.STUDIO(Design Director) Geo-Digital Arts and Technology Le Vieux Moulin, Route de Mons 83440 SEILLANS, FRANCE Tel: +33 (0)4 94.76.98.72 Fax: +33 (0)4 94.76.97.77

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Re: [Zope] Stupid DTML Question
by Dr. Ross Lazarus 01 Nov '99

01 Nov '99

Rather than waste energy grumbling about what a raw deal you got with zope documentation, now that you know the answer to something that really bugged you, please, please, please... create a "howto" on the www.zope.org site in your own member folder. Ask for comment on this list. When it's ready, create a news item and request that they be catalogued. That way, the knowledge can be found by future generations of zope users. Don't wait for someone else to do this for you. You get what you give. What goes around comes around. Etc. No-one else gets paid (much) to do this - this is open source folks. g.plivn-(a)itsystems.lv wrote: original article:http://www.egroups.com/group/zope/?start=15950 > Yeah, this was a question for two hours for me to seek out it in zope > documentation and I found it only in an example > Maybe someone can put this simple question in a little bit more reachable > place? > > Gints -- Dr Ross Lazarus Associate Professor and Sub-Dean for Information Technology Faculty of Medicine, A27, R126a, University of Sydney, Camperdown, NSW 2006, Australia Tel: (+61 2) 93514429 Mobile: +61414872482 Fax: (+61 2) 93516646 Email: rossl(a)med.usyd.edu.au http://www.health.usyd.edu.au/people/rossl.htm

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