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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Imprecise click"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96259#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Imprecise click"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96259">bug 96259</a>
from <span class="vcard"><a class="email" href="mailto:peter.hutterer@who-t.net" title="Peter Hutterer <peter.hutterer@who-t.net>"> <span class="fn">Peter Hutterer</span></a>
</span></b>
<pre>(In reply to Paviluf from <a href="show_bug.cgi?id=96259#c26">comment #26</a>)
<span class="quote">> (In reply to Peter Hutterer from <a href="show_bug.cgi?id=96259#c25">comment #25</a>)
> > quick calculation shows that the zone is 9.6mm + the 2/3mm zone. that makes
> > it more than 10mm which is bigger than on all other touchpads where we cap
> > to 10mm.
>
> > but now I'm losing track of this bug. What's left to fix?
>
> It seem that is more complicated than this. If I move my finger from bottom
> to top the insensitive zone is about 13mm. Now if I move my finger from top
> to bottom the insensitive zone is about 5mm. The problem is that when I
> click I naturally put my finger at about 10mm and the **pressure is from top
> to bottom**. So I'm in the sensitive zone and the click is imprecise.</span >
If a finger starts outside the software button area, the button zone doesn't
stop pointer movement. but when you start inside the button area, the pointer
only starts moving when you move outside that area. that explains the different
sizes.
there isn't much we can do about that because there is plenty of movement that
would hit the button zone and should not be impeded. since there is no haptic
feedback when the button zone is hit having the cursor stop moving is not
ideal.
AIUI you're not lifting the finger between moving into the button area and
clicking? If you do so, there shouldn't be any movement as long as the finger
remains in the button area.
you can probably see why we're advocating clickfinger as the future default
interaction :)
unfortunately we don't get enough data from the touchpad to detect pressure
changes correctly before a button press.</pre>
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