Re: [PATCH 8/9 v2] Input: add BTN_TOOL_QUINTTAP for reporting 5 fingers on touchpad

Chase Douglas
2011-07-26T23:03:47Z

On 07/25/2011 11:16 AM, Dmitry Torokhov wrote:
> On Mon, Jul 25, 2011 at 05:14:22PM +0800, Daniel Kurtz wrote:
>> On Mon, Jul 25, 2011 at 4:29 PM, Dmitry Torokhov
>> <dmitry.torokhov@gmail.com> wrote:
>>>
>>> On Wed, Jul 20, 2011 at 09:39:05PM +0800, djkurtz@chromium.org wrote:
>>>> From: Daniel Kurtz <djkurtz@chromium.org>
>>>>
>>>
>>> Do we know what we want to do with this gesture? Because if not I'd
>>> rather not merge it for now, until there are real users.
>>
>> And do what instead?
>> Report 5 fingers with BTN_TOOL_QUADTAP?
>>
>
> That, or nothing... The fact that the device can report 5 finger touch
> does not mean that anybody cares about this.

The uTouch gesture stack supports up to 5 touch gestures, and although
most of them are either hard to do on a trackpad or are not possible
with this driver, I can think of uses for 5 finger tap. Unity uses four
finger tap quite effectively I believe.

There is a meaningful limit to this: five fingers on a human hand. It
seems more arbitrary to stick the protocol limit at four fingers.

-- Chase