Re: [PATCH] hid-ntrig.c Multitouch cleanup and fix

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Rafi Rubin wrote:
>> Single touch should be goverened by one of BTN_TOUCH or ABS_PRESSURE.
>> BTN_TOOL_DOUBLETAP is a two-finger event.
> 
> That definitely makes sense to me.  I really don't know why wacom uses
> double tap there.
> 
> Is there any harm in letting through the BTN_0 events?  Is the "rdesc"
> mapping defined by the hardware or hid?

I cannot imagine BTN_0 will do any harm. In synaptics, the BTN_X buttons are
mapped to multibuttons without clear-cut usage. The button events that carry
well-defined semantic meaning with regard to touch screens are BTN_TOUCH (any
finger), BTN_TOOL_FINGER (one finger), BTN_TOOL_PEN (pen), BTN_TOOL_DOUBLETAP
(two fingers) and BTN_TOOL_TRIPLETAP (three fingers or more).

Henrik

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