<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><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> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - Continue moving the pointer when 2fg scrolling ends"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86807">bug 86807</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>peter.hutterer@who-t.net
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Continue moving the pointer when 2fg scrolling ends"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86807#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Continue moving the pointer when 2fg scrolling ends"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86807">bug 86807</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 Hans de Goede from <a href="show_bug.cgi?id=86807#c1">comment #1</a>)
<span class="quote">> The problem here is not 2fg scrolling triggering, the problem is the finger
> getting unpinned, once unpinned it counts for 2fg scrolling, and as such as
> long as 2 fg are down you will be in a 2fg scrolling situation. Note that
> this is only a problem when doing click + drag outside the button areas.</span >
correct, but "outside" also means "moves outside". And that was what happened
to me when I was using my thumb to click. As the touchpoint changes shape
during hand movement, the actual touch point may move outside the buttons and
trigger scrolling. User-visible change is that movement stops suddenly.
+------------------------+
| __ |
| /Y \ |
| \ \ |
| \ \ ______ |
| __ \ \/ \ \
+----/ \---+\ \ \ \
| \ X \ | |
+-----\ \-+-|
\ \__|
As Y moves around, the angle of the thumb changes (rolls sideways or forward)
and X moves up and down. That can move it outside the button area. I'll attach
evemu recordings to illustrate the point.
fwiw, with the patch I get occasional cursor jumps and errors of "invalid
event, no fingers are down" (the errors seem to be unrelated to the patch, see
#86917).
I think not scrolling while dragging is a good solution for now. We originally
allowed it because it's not that uncommon to have to scroll while dragging but
if it breaks a more common use-case then we should go for the more common one.
I'd like us to bounce around some more ideas on how we can fix Jasper's
use-case though, I don't think it's that uncommon. Jasper, can you attach a few
evemu recordings with common uses, preferable in all directions? maybe there's
some common data that we can easily detect.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>