Shift+drag should initiate lasso selection when cursor is within frame

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

1. Create new score, treble template, default settings
2. Add some notes to the first measure
3. Insert a text frame before the first measure
4. Add a few lines of text
5. Place mouse cursor within the title frame
6. Shift+drag to select the contents of the first measure

Result: canvas is dragged

Dragging the canvas is expected without Shift, so it appears the Shift is being ignored due to the start point being within a frame rather than a truly empty area. But for all practical purposes, the interior of a frame is empty space, so I would expect Shift+drag to initiate a lasso selection.

In some cases, apparently adding Ctrl somehow worked to initiate selection, even though Ctrl+Shift+drag is supposed to start a clone operation. In 4.3.2 (and in earlier releases), adding Ctrl causes a crash when starting within a text frame. After merging #23789, the crash will be fixed, but then I expect Ctrl+Shift+drag to do what Shift+drag does, and I expect Shift+drag to select. I expect that in all frame types.

See https://github.com/musescore/MuseScore/issues/23318#issuecomment-2253458642 for context.

Supporting files, videos and screenshots

Screen recording 2024-07-26 5.28.20 PM.webm

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

4.3.2

Regression

No.

Operating system

Debian 12

Additional context

No response

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

Start by reproducing the Shift+drag behavior from within a text frame, then trace the desktop canvas input handling and frame hit-testing involved in that gesture. Done means Shift+drag starts lasso selection from every frame type, ordinary dragging still moves the canvas, and Ctrl+Shift+drag retains its intended clone behavior without a crash.