On Fri, Mar 2, 2012 at 6:21 PM, Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> wrote: > Hi Jason, > > On Fri, Mar 02, 2012 at 10:36:22AM -0800, Jason Gerecke wrote: >> The Intuos5 was just announced, and I'm working on adding support for >> it to the wacom kernel module. One feature new to the Intuos5 is the >> addition of capacitive sensors embedded in the buttons. Each >> ExpressKey (button) has two bits of state: one for the capacitive >> switch and one for the mechanical switch. These bits are synthesized >> into three cases: released, touched, and pressed (the 4th case of >> "pressed with a non-capacitive object" isn't particularly >> interesting). My initial thought was to call input_event() with a >> unique value for the 'touched' case. However, the documentation only >> defines three values for EV_KEY: 0 (released), 1 (pressed), and 2 >> (autorepeat). >> >> Is 'touched' a case we would want to allow for EV_KEY, or should I be >> representing things differently? > > Differently please. It looks like you have 2 independent objects there - > one mechanical switch (persistent on/off) and one is a key (pressed > while touched). There is a little overlap here with clickpads and it would be nice if user apps could work similar for both. The main use (I think) of this proposed key press is to give visual feedback were users finger is at before they press hard enough to activate button. It could be the HUD feature of Intuos5 or the taskbar applet Windows synaptics driver has that gives feedback how touchpad is being touched. For clickpads, its an X/Y value that a HUD/applet would use to give the visual feedback. If these new "keys" are not exposed as a full blown capacitive touch strip then you could simulate that and send an Y=1 and X=1..4 to represent were finger is. The main negative with this is you'll have the headache clickpad user land has trying to detect when X/Y is buttons and when its touchpad movement. At least in your case, you could send a BTN_TOOL_STRIP or a BTN_TOOL_FINGER+serial # to let user land know this is a unique area of touch. Chris -- 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
