[MU4 Issue] Incorrect distance between lines in a end barline

[igorkorsukov]

Describe the bug
In MU4, the distance between the lines of a end barline is greater than in MU3

To Reproduce
Steps to reproduce the behavior:

1. Open score MuseScore/vtest
2. See end barline

Expected behavior
The distance between the lines of the end barline should be less, probably as in MU3

Screenshots
MU4

MU3

Desktop (please complete the following information):

• OS: Any

[oktophonie]

Strangely the style value in the .mscx file here is <endBarDistance>0.3</endBarDistance>, but when you open this file in MuseScore 3.6 it becomes 0.96 for some reason (even selecting 'keep old style').

In MU4 we have changed the interpretation of this value (see #9138), but something odd is going on besides that, perhaps due to the file being a MuseScore 2.1 file, and the value being corrupted in the migration process.

Simply removing the <endBarDistance> line from the file solves this specific problem (the default in either MU3.6 or MU4 is then used instead). That doesn't solve the underlying issue of course!

[Tantacrul]

@oktophonie - I've added a P2. Don't know if we want to solve it for 4.0. If you think we can bump it to 4.x, let's do so.

[MarcSabatella]

I could be confusing this with something else, but I do seem to recall the interpretation of a few distances like this having changed some years ago. Like originally it measured from the right edge of the first barline to the left edge of the second, but then it was changed to measure the distance left to left or center to center. Perhaps related to the changes necessitated when we adopted SMuFL, but now we’ve gone back to the older interpretation or yet another?

If so, for MuseScore 3 we probably had special-case code in the 2.x import function to correct this. And presumably in MU4 it’s only an issue for 2.x files that for whatever reason had override the default, because otherwise the value wouldn’t have been recorded in the MSCX.

[Tantacrul]

@oktophonie - I'm assigning you and moving to 4.x. Closing for now, until we complete MS4.