doc: add a note that middle-button dragging is not possible on sticks

Just to have something to point bug reporters to.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2015-06-10 07:45:39 +10:00
parent 36753fae8f
commit d29f17190c

View file

@ -55,6 +55,10 @@ a designated button is held down. For example, Lenovo devices provide a
<a href="http://en.wikipedia.org/wiki/Pointing_stick">pointing stick</a> that emulates
scroll events when the trackstick's middle mouse button is held down.
@note On-button scrolling is enabled by default for pointing sticks. This
prevents middle-button dragging; all motion events while the middle button is
down are converted to scroll events.
@image html button-scrolling.svg "Button scrolling"
The button may be changed with