[webkit-gtk] Implementing Multipointer Support

[David P. Reed]

Just a comment: before diving into implementation, I would suggest that 
you design how CSS, HTML, and Javascript have to change to handle 
multiple independent pointers.  Each of these abstractions embeds the 
assumption that there is one pointing device in specific ways 
(Javascript is least constraining, CSS is the most).

Note that even "multitouch" displays treat the touches as single input 
device controlled by one person, and generate "gesture events" - see the 
Safari Reference Manual for gesture input - you get a touch event that 
indicates the positions of all the fingers.

The most trivial thing would be just to add additional information to 
the incoming "mouse events" coming from GTK, indicating a "mouse ID".  
That only begs the question though.

The real question is to define what it means to trigger an "onhover" 
event, or to have a "hover" CSS style, or how a click is interpreted.

On 06/09/2010 09:51 AM, Muriel Bowie wrote:
> Hi all,
>
> I am working on a research project that involves multiple people
> collaborating on several inter-connected large displays. For this
> purpose, we want to implement a browser which supports multiple
> concurrent mouse pointers. GTK has a git branch where they working on
> the integration of MPX (http://live.gnome.org/GTK%2B/MPX). I have been
> using GTK MPX, but since we need to support multiple interconnected
> displays, we want to add MPX support to the web browser.
>
> I have been playing around with WebKitGtk for a bit, but I haven't
> figured out the best way to integrate MPX support. Since it's platform
> dependent, it would probably make sense to implement it as a plugin.
> Simply compiling WebKit with the newest GTK sources doesn't work (of
> course).
>
> Anyway, I am new to WebKit and I would really appreciate some input on
> how this could/should be done.
>
> Thanks,
> Muriel
>
>    
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