[lkml]   [2012]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] Input: Document the device properties
On 01/30/2012 10:35 AM, Henrik Rydberg wrote:

> +--------------------
> +For touchpads where the button is placed under the touchpad, such as
> +clickpads and macbooks, this property should be set. Common in devices from
> +2009 and onwards.

"Under" can be interpreted to mean "under as in towards the user when
looking from above" as well as "under as in towards the Earth's core". A
more unambiguous description would be something like "For touchpads
where a physical button is beneath the pad's touch surface so that
pushing down on the touchpad causes a button click".

> +------------------
> +Some touchpads, most common between 2008 and 2011, can detect the presence
> +of multiple contacts without resolving the individual positions; only the
> +number of contacts and the corresponding bounding box is known. For such
> +touchpads, the semi-mt property should be set.

A "corresponding bounding box" usually means "a bounding box that
contains all touches on the touchpad". I've been told (though I have not
checked it myself) that there are devices that don't do this. They only
report a bounding box for some subset of touches. If this is the case,
it should be documented here.

 \ /
  Last update: 2012-01-30 13:25    [W:0.037 / U:4.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site