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doc: add some documentation for disable-while-typing

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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
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Peter Hutterer 2015-05-18 14:54:50 +10:00
parent c2f8b508b9
commit 6acd97457f
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doc/palm-detection.dox
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@ -57,5 +57,26 @@ the palm on the touchpad while using the trackstick).
If the touchpad is disabled, the @ref t440_support "top software buttons"
remain enabled.
@section disable-while-typing Disable-while-typing
libinput automatically disables the touchpad for a timeout after a key
press, a feature traditionally referred to as "disable while typing" and
previously available through the
[syndaemon(1)](http://linux.die.net/man/1/syndaemon) command. libinput does
not require an external command and the feature is currently enabled for all
touchpads but will be reduced in the future to only apply to touchpads where
finger width or pressure data is unreliable.
Notable behaviors of libinput's disable-while-typing feature:
- Two different timeouts are used, after a single key press the timeout is
short to ensure responsiveness. After multiple key events, the timeout is
longer to avoid accidental pointer manipulation while typing.
- Some keys do not trigger the timeout, specifically some modifier keys
(Ctrl, Alt, Shift, and Fn). Actions such as Ctrl + click thus stay
responsive.
- Touches started while the touchpad is disabled do not control the cursor,
it is thus possible to rest the palm on the touchpad while typing.
- Physical buttons work even while the touchpad is disabled. This includes
software-emulated buttons.
*/