[resending as plain text for the list] Hi folks, More and more we're seeing touch input devices that support detection of fingers that are above the surface and not touching. We were thinking of writing a kernel patch for one such device. Normally we would indicate distance with ABS_MT_DISTANCE, but we ran into the problem that sometimes the hardware will not be able to report a distance (or will stop reporting a distance when it's too great a number), and we had the (bad) idea to simply report a value or 1 or 255 or something like that when distance is unknown. Dmitry warned that a similar thing happened with PRESSURE a while ago, and it was a mess as different drivers did different things. We are now wondering if we should come up with a standard way to indicate hover with or without distance (or with distance being optional). Dmitry had the idea for a new tool type, HOVER; FINGER would be for touches that are actually touching. What do folks here think? Thanks, -andrew -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
