[patch] ignore trackpad/mouse while typing

OK, here's a trivial patch (linux-2.4.18) for disabling/ignoring
the mouse/trackpad while typing. It can be very convenient on notebook
computers.
NOTE: this patch works only on machines using the 'new' input layer
(e.g. Apple Powerbook, ibook, ...)

The holdoff time can be adjusted via sysctl/procfs - see description
in the patch file.

-- Till

PS: Please CC me if there are comments/questions; I'm not subscribed to
this mailing list.

On Thu, Nov 28, 2002 at 05:34:32PM -0800, Till Straumann wrote:

    /proc/sys/dev/input/mouse_holdoff_ms

for tuning the time period during which the mouse is to
be ignored after a keystroke (valid range from
0 [disabled]  ... 3000 ).

NOTE: Official 'SYSCTL' numbers should be assigned
      for the 'input' and 'input/mouse_holdoff_ms' nodes.

why didn't you just use the mac_hid/ node to hold your
mouse_holdoff_ms node?

--
Ethan Benson
http://www.alaska.net/~erbenson/

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On Fre, 2002-11-29 at 02:34, Till Straumann wrote:

+ 		if ( jiffies - mouse_holdoff_last_jiffie < mouse_holdoff_jiffies )
+ 			return;
+ 		/* Note: we could lose mouse events when the jiffie counter rolls over... */

I think the difference is always correct.


--
Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member   /  CS student, Free Software enthusiast

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Michel Dänzer wrote:

On Fre, 2002-11-29 at 02:34, Till Straumann wrote:

quoted

+ 		if ( jiffies - mouse_holdoff_last_jiffie < mouse_holdoff_jiffies )
+ 			return;
+ 		/* Note: we could lose mouse events when the jiffie counter rolls over... */

I think the difference is always correct.

No: if no key is pressed for (any integer multiple of) 2^32 jiffies then
mouse events are ignored during a short period of time following the
rollover ;-)
[ i.e. the rollover of the difference, not the jiffies; the true
   relation being
    (jiffies - mouse_holdoff_last_jiffie) % 2^32 < mouse_holdoff_jiffies
]

Anyways: the patch has another problem: the trivial version cannot deal
with

  - emulated mouse buttons (ignored because input_event() first receives
    a key event which is sent to the keyboard handler who remaps it to a
    mouse/button event to be ignored since it happens shortly after the
    key event triggering it)
  - 'modifiers' (Shift, Ctrl & friends). All keys seem to be
    'auto-repeated' by the input driver resulting in repeated
    key events while a modifier is pressed, hence causing the trivial
    patch to ignore mouse events while a modifier key is held down.

I'm working on an improved version supporting a (configurable but
reasonably defaulted) list of keys who are to be considered 'modifiers'.

-- Till


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