Exchanging voices on partial measure selection affects the whole measure

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

Selecting part of a measure and choosing Tools > Voices > Exchange voice 1-2, exchanges voices on the whole measure, and not just the portion selected. This can produce some unexpected results if the user is unaware of the behavior, as demonstrated in the screen recording.

To manually solve the issue, some strange workarounds are required for the user such as changing voice 2 to 3, then 1 to 2, and finally 3 to 1. Then you have to clean up the voice 3 rests.

Steps:

1. See the attached screen recording

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/e9d4c45e-7de0-459c-9963-e54c14fd4fd6

What is the latest version of MuseScore Studio where this issue is present?

4.4.1

Regression

No.

Operating system

macOS 12.7.2

Additional context

Same behavior in MS2 and MS3.

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible

Reproduce the behavior in MuseScore Studio 4.4.1 using Tools > Voices > Exchange voice 1-2 with only part of a measure selected, then trace the selection handling for this command. Done means exchanging voices only in the selected portion rather than across the whole measure, while preserving expected behavior for a full-measure selection.