On Tue, Jul 21, 2009 at 9:07 PM, Ondrej Certik<ond...@certik.cz> wrote: > On Tue, Jul 21, 2009 at 9:03 PM, Ondrej Certik<ond...@certik.cz> wrote: >> Hi, >> >> here is an early preview of the pyjamas version: >> >> http://2.latest.pythonnb.appspot.com/ >> >> So far my experience is: >> >> * it doesn't work in IE8 (that's a showstopper) >> * it's fast enough >> * implementing the cursor positions and resizing was a piece of cake >> (I was very impressed) >> * learning the whole framework took me some time, one has to read sources a >> lot >> * if it doesn't work, it's a bit difficult to debug (because it's not >> just javascript, I need to figure out where I made the mistake in the >> python code), I basically use git a lot and always do a small change >> and test, small change and test. If it fails, I break my changes in >> half and test, etc. >> >> Essentially, pyjamas provide a complete DOM access (just like jQuery), >> but in Python, and then builds its own widgets on top of it. >> >> I am now learning how to do AJAX with it. So far only the cursor >> movement and cells work (the focus is not yet shown by a blue line, >> I'll do that later). Try this: >> >> def f(x): >> <hit TAB couple times> >> >> and then hit <backspace>, you will see that it deletes 4 spaces, but >> in a clever way, e.g. if you are at a position 7, it goes to 4 first >> and then to 0. This is how my vim is setup for python editing and I >> like it a lot. >> >> Let me know if it works in your browser so far. I only tested firefox >> 3.5, that works fine. IE8 doesn't load the javascript, e.g. you will >> see no textbox. Also, in Firefox I get frequent error messages >> (printed in the actual HTML): >> >> " >> JavaScript Error: Permission denied to get property >> HTMLDivElement.parentNode at line number 9254. Please inform >> webmaster. >> " >> >> It's a bug in pyjamas. > > Also cell joining is not yet implemented. But it works in the Chrome > browser, so at least something.
I implemented the AJAX thing as well, here is a working example (sort of): http://3.latest.pythonnb.appspot.com/media_files/output/index.html Besides what I wrote above, there is some problem with CSS styles, which shows up when you evaluate some cell and see the output, the "insert new cell blue thin line" is misplaced. I implemented it in the "pyjamas" branch in my repository (link is on the webpage), so there are some leftovers (like the jQuery.js library, which is *not* needed anymore, etc.). The django backend didn't change at all and now the whole notebook doesn't contain a single line of javascript (everything is pure python). I think that itself is pretty impressive. Here is the file, that gets translated: http://github.com/certik/notebook/blob/001b4ddf444b480822adf9216419afa1adaf4818/media/index.py In terms of lines of code, it's about the same as my previous version in javascript: http://github.com/certik/notebook/blob/ca4e6a90a3f0c10c78c8c99d4d55055ba5019c28/templates/index.html But there are still some things missing (e.g. joining and deleting the cells). The python code should be refactored first though, there should be a class Cell, that should have references to it's children, like the input/output cells etc. and this class should now how to turn on/off the output cell etc. Currently I am using the DOM directly in a bit hackish way, this should be polished. Essentially I was fighting pyjamas to access the elements in the DOM, for example jQuery's analogs of insert before and after are not available (resp. it's tricky). Nevertheless, overall, I like the pyjamas approach and the above things can be fixed. Also now there is a nice possibility to mock up the controls and run regular python unittests on the whole thing. That's a big plus. The remaining big problem is the IE8 support and the errors that sometimes popup in firefox. I reported it here: http://groups.google.com/group/pyjamas-dev/browse_thread/thread/f170c3709c7f12ed and I was told I am pretty much on my own with IE8. So that's very disappointing of course, but maybe the fix is easy. If it is not, then that's a big problem. Ondrej --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
