https://bugs.kde.org/show_bug.cgi?id=510591

--- Comment #19 from Maxim Kartashev <[email protected]> ---
> ...
> it means that there was a motion event but only with absolute coordinates
> (the app could compute a delta value in such a case if it is okay).

I'm afraid the specification does not support this approach. Here's a quote
from https://wayland.app/protocols/relative-pointer-unstable-v1:

"Relative motions are not coupled to wl_pointer.motion events, and can be sent
in combination with such events, but also independently. There may also be
scenarios where wl_pointer.motion is sent, but there is no relative motion"

So even if KWin currently guarantees that a frame event will follow the motion
and relative_motion events and they are always grouped together, who's to say
that the order remains in future versions after some refactoring, etc?

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