On Monday 02 April 2007 00:38, Florent THIERY wrote: > > > i'm pretty curious to know what exactly the touchscreen sees when you > > > touch the screen with 2 fingers at the same time, when you move them, > > > when you move only one of the 2, etc...., ...). > > > > The output is the center of the bounding box of the touched area. > > Pressure has little, but not no effect. Almost no effect on a single > > touch, on a double touch, the relative pressures will have a slight > > skewing effect towards the harder touch. > > (from theory). > > The touch point skips instantly on double touch. > > Thank you. I added your report to the wiki, and reorganized the mails > so that a human being can try to contribute :p > > http://wiki.openmoko.org/wiki/UI_Improvements > Please take a look if interested to help. > > If you have some spare time to continue reporting about the > touchscreen, there are some questions on the wiki, but anybody having > access to hardware can do it. > > Why do i keep asking for this? Because i'm not sure apple's ibooks > have multi-touch pads, but if you slide 2 fingers in parallel, it > makes scrolling. Which means: if it's not multitouch at it's base > (and, if it was, there would be more of it), then they detect it using > a hack. So can we do too, but we have to know exactly how the > touchscreen reports "exotic" uses.
The synaptics touchpad driver for X supports 2- and 3-finger taps but requires hardware support for this. The apple touchpad appears to be a variant on this (see http://www.popies.net/atp/). I've never tried a 2-finger drag on my synaptics pad so I don't know what it would do. Of course the apple/synaptics pad may have a similar hack in firmware, so the questions are still valid. > > Regards > > Florent > > _______________________________________________ > OpenMoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community _______________________________________________ OpenMoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
