Small staff in multi-staff instrument leads to incorrectly resized instrument name

[mmeyn]

Issue type

Engraving bug

Bug description

This happens only when resizing the uppermost staff of a multi-staff instrument (f. e. right hand of a keyboard instrument).

This scenario is used in Basso Continuo parts for an editorial realization of the BC figures.

Steps to reproduce

1. Create a new score with a keyboard instrument and at least another instrument.
2. Resize the upper staff of the keyboard instrument to small staff.

Screenshots/Screen recordings

MuseScore Version

4.0.2

Regression

I don't know

Operating system

Linux

Additional context

No response

[mmeyn]

Oh, I didn’t say what I expected as correct behaviour: The instrument name of the Cembalo should be the same as Traversflöte, i. e. the font size should match the default staff size whenever there is at least one default sized staff (only when all staves of an instrument are small, the instrument name might be scaled down).

[mmeyn]

The InstrumentName of a multi-staff instrument is not a property of the Part but of the first Staff. In SystemLayout::layoutInstrumentNames it is moved to the first visible SysStaff. I tried to move it to the first SysStaff that is both visible and the corresponding Staff is not Pid::SMALL (if possible, otherwise just to the first visible) but that’s not sufficient because then it’s placed incorrectly.

[Jojo-Schmitz]

Same issue in Mu3