Re: [Xournal-devel] Chrome experiment

[Felix B. <fe...@fb...>]

Hi Wouter!

To me, the key feature of Xournal has always been subpixel precision. Along
with presssure sensitivity, this is what makes handwriting in Xournal
readable. I cannot produce readable handwriting in any of the HTML5 sketch
apps I have seen so far.

That said, I think there is great promise for an HTML5-based
Journal/Sketch/Notepad app. The question is how to get the pen data
(including pressure sensitivity and subpixel precision). There are two
options AFAIK:

1) The Wacom Web Browser Plugin
(http://www.wacomeng.com/web/index.html)<http://www.wacomeng.com/web/index.html>works
reasonably well (and actually comes with a small sketch app as a
demo). I have run into some trouble, though, regarding window focus, etc.
and I do not know how actively Wacom maintains this plugin. Nonetheless I
think this is the way to go.

2) The alternative is to hand-code bindings to e.g. the WinTab API using a
foreign function interface to Javascript, such as JSctypes
(https://wiki.mozilla.org/JSctypes <https://wiki.mozilla.org/JSctypes>). Of
course, this would not work from within a webbrowser because of the security
model, but a stand-alone app based on Xulrunner or Chromeless might work.

As you can see I have a done a bit of research on this question (see also
http://www.inkcode.net) but I have not started coding any HTML5-based sketch
app yet. I do plan, however, to add some basic sketch functionality to my
experimental text editor Qute (http://www.inkcode.net/qute-html5) in the
future. Help would be very welcome! Conversely, I would be interested in
contributing to a more Xournal-like HTML5 application.

Cheers,
Felix


2011/7/12 Wouter Geelen <wou...@gm...>

> Anyone seen this chrome experiment?
>
> http://www.chromeexperiments.com/detail/sketch/
>
> http://hakim.se/experiments/html5/sketch/
>
> We could use the code to port xournal to the web...
>
>
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