Re: some very cool features for a capacitive touchscreen

2013-10-25 Thread Manuel QuiƱones
2013/10/24 Sameer Verma sve...@sfsu.edu I saw some very cool features in a presentation today at the Internet Archive. The presentation was by Eitenne Mineur, as part o the Books in Browsers 13 event. They are using paper and other simple objects that have kind of conductive patterns to

Re: some very cool features for a capacitive touchscreen

2013-10-25 Thread Jon Nettleton
On Fri, Oct 25, 2013 at 1:40 PM, Manuel QuiƱones ma...@laptop.org wrote: 2013/10/24 Sameer Verma sve...@sfsu.edu I saw some very cool features in a presentation today at the Internet Archive. The presentation was by Eitenne Mineur, as part o the Books in Browsers 13 event. They are

Re: some very cool features for a capacitive touchscreen

2013-10-25 Thread Gonzalo Odiard
The last time I checked, the width was as pressure in evdev, but was not available in the gtk event. Another option is prepare circles of may be 5 mm and paste them behind the figures, in different positions. A program can detect that circles as touches, and recognize the figure using the relative

Re: some very cool features for a capacitive touchscreen

2013-10-25 Thread James Cameron
Sorry, did I say 6mm wide? I was inaccurate. The objects should be 8mm wide. It might well work with less, but I'm reading from the design specifications which describe use of stylus, so it would be better to use 8mm width. Or do a whole lot of testing to be sure.

some very cool features for a capacitive touchscreen

2013-10-24 Thread Sameer Verma
I saw some very cool features in a presentation today at the Internet Archive. The presentation was by Eitenne Mineur, as part o the Books in Browsers 13 event. They are using paper and other simple objects that have kind of conductive patterns to create story platforms, but with interactivity.

Re: some very cool features for a capacitive touchscreen

2013-10-24 Thread James Cameron
Sounds interesting. For the XO-4, use objects that are at least 3mm thick (front to back), at least 6mm wide, and opaque to infrared. There's a piano keys mode used by an activity, in case further code tricks are interesting. -- James Cameron http://quozl.linux.org.au/