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 postions. Our touch screen can detect 4 touches, but can be confused if are aligned in horizontal or vertical.
Gonzalo On Fri, Oct 25, 2013 at 8:50 AM, Jon Nettleton <jon.nettle...@gmail.com>wrote: > > > > On Fri, Oct 25, 2013 at 1:40 PM, Manuel Quiñones <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 using paper and other simple objects that have kind of >> > conductive patterns to create story platforms, but with interactivity. >> > Start with a story screen, place a paper cutout of one of the >> > characters, and the story comes to life. Place a second character, and >> > the scene changes. >> > >> > All very interesting ideas for us to use on the XO-4 Touch, although >> > the XO4 does not use capacitance, but the idea is very cool. >> > >> > http://volumique.com/ >> >> Wow, this is very inspiring. Somebody should try this technique on an >> XO-4. > > > Unfortunately because of the way our touch technology works, this exact > implementation won't work. However our touch technology is actually nicer > because you don't need special material to activate the touches. I think > what would work well for us would be an activity that allowed you to > program what shape/character was attached to different size touch points. > Then use small wooden/plastic disks of different sizes glued or clipped to > the back of the cutouts to trigger the touch events and let the program > know what story to tell. > > smallest disk = dog > medium disk = frog > large disk = frisbee > > I would have to double check but I think we pass along the touch width as > the pressure value for evdev. Should be easy to parse the event and figure > out what is on the screen, and should work with 2-4 touches/items. > > -Jon > > _______________________________________________ > Devel mailing list > de...@lists.laptop.org > http://lists.laptop.org/listinfo/devel > >
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