Smooth panning (auto-scrolling) should work as good as in MS3.6.2

[DmitryArefiev]

Bug description

Smooth panning (auto-scrolling) should work as good as in MS3.6.2 (or better)

Steps to reproduce

See #19169 (comment)

Screenshots/Screen recordings

263736995-de98b124-a341-4240-ae11-ddeabe003561.mp4

MuseScore Version

4.2.0 master

Regression

Yes, this used to work in MuseScore 3.x and now is broken

Operating system

All

Additional context

#18718

[bkunda]

Not sure I agree this is a P1, especially given the mountain of other issues we have in the 4.2 project.
I understand though that this feature has been recently brought "back in" to v.4, and it's obviously the case that it needs improving to make it function as well as it did in v.3 (if not better).
So this will take some time, and there also needs to be a bit of design work around the labelling of the feature and choosing where else to expose it.
I'm of the opinion that there are bigger problems to tackle first, hence I've lowered the priority but kept it in the project.

[shoogle]

Another improvement would be to always position the playback cursor near the left edge of the screen (maybe 1/4 of the way in). It's more valuable to see the music that is coming than the music that has already been played.

[MarcSabatella]

I concur. That should be a trivial change (possibly just changing "2" to "4" in both places here: https://github.com/musescore/MuseScore/pull/18718/files#diff-1ad85d6753e0a807acd0537fa45ee920e557f46ba99c86331e045fd37bec36abR865-R872) that should make it more in line with what's expected.

[asmason]

The way this worked in MS 3.6.2 was already perfect for my use case (choir practice videos). I'd also say that the implementation of smooth panning was better than any other tool available (Finale, Sibelius, Dorico, etc), for the purpose of recording your screen whilst playing back. The MS 3.6.2 smoothPan advanced preferences allow you some control of position the playhead too, and the scrolling is smooth. The current MS4.2-master implementation seems to jump at the start of each bar. I for one would really appreciate this feature working as it did in MS 3.6.2!