[Libreoffice-bugs] [Bug 139917] Smooth scroll works opposite of that indicated by checkbox

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=139917

--- Comment #3 from spokanemagneto at gmail.com ---
Attn:  V Stuart Foote. I just sent you a reply, but no sooner than I pressed
Save Changes, you apparently posted a comment at the same time, so mine has not
posted. Strange.

The gist of what I wrote was that I played around with this for an hour after
your first reply. It was much better than I originally found it to be, but I
had since disabled Skia rendering to help with the text scrolling issue I
reported earlier. I did learn two things, one is that although the smooth
scrolling is better with the checkbox selected now (with hardware acceleration
used), there is a bizarre thing with the scroll bar handle. It will make an
initial jump up/down the scroll bar in the appropriate direction before
stopping, all the while the document is still scrolling. The scroll bar handle
does not move or "catch up" until after you release the L-mouse button. Very
strange. I have never seen that happen before, and I have ever using word
processors and other software since 1983. 

The other thing I noticed is that if you use the scroll bar arrows to slowly
and smoothly scroll through a long document, it almost always causes the
aforementioned text tearing issue to occur at some point while scrolling, so
that is a way for you to more consistently replicate that issue (I would still
suggest a lengthy document of at least a dozen pages of formatted text,
including tables).

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