https://bugs.freedesktop.org/show_bug.cgi?id=99703
--- Comment #2 from Christophe de Dinechin <[email protected]> ---
(In reply to Peter Hutterer from comment #1)
> Can you test macos and/or windows to figure out the parameters they're
> using? Would be useful to have a writeup of what you think happens there,
> mainly for comparision/inspriration.
On macOS, if I move the mouse cursor with one finger, and then drop a second
finger while the cursor is on a window that can scroll, I observe the following
(test done by moving the cursor from top to bottom):
# If my mouse cursor is travelling at about 100px/s or more, the second finger
has no visible effect. The cursor keeps moving.
# If my mouse cursor is moving at 20px/s or less, then the second finger
immediately activates scrolling much like in Linux.
It's hard to measure the threshold precisely. I don't know of a tool for that.
I'll do a test under Windows if I can revive my last PC laptop.
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