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This can be tested with the `application` example, looking at the events shown for mouse wheel movement. `wl_pointer::axis_discrete` isn't sent in version 8 or higher of `wl_pointer`. And `sctk` doesn't convert the `value120` events, so on compositors advertising version 8, only pixel scroll events were being sent. This sends `MouseScrollDelta::LineDelta` with a fractional value, without doing any accumulation. Given `LineDelta` contains `f32` values, this presumably is expected? Though it might be good to change the definition of `MouseScrollDelta` to include both discrete and pixel values, when the compositor sends both. I'm not familiar with how this works on non-Wayland backends though.