Bug 508452

Summary:	Mousewheel scrolls one line per scroll
Product:	[Applications] dolphin	Reporter:	Attila <bugs.kde.attila>
Component:	view-engine: details mode	Assignee:	Dolphin Bug Assignee <dolphin-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	normal	CC:	felixernst, kfm-devel
Priority:	NOR
Version First Reported In:	25.08.0
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=508290
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Attila 2025-08-19 08:15:49 UTC

SUMMARY
The mousewheel scrolls one line per scroll instead of three lines. Dolphin suddenly seems to ignore the global settings. The panel view places works as expected. The mousewheel scrolls three lines per scroll.

STEPS TO REPRODUCE
1. Open Dolphin
2. Switch to "details mode"
3. Use the scrollwheel to scroll up and down

OBSERVED RESULT
The mousewheel scrolls one line per scroll

EXPECTED RESULT
The mousewheel should scroll three lines instead of one line.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1
Kernel Version: 6.15.9-201.fc42.x86_64 (64-bit)
Graphics Platform: X11
Graphics Processor: Intel® UHD Graphics 770

Comment 1 Felix Ernst 2025-09-01 09:30:46 UTC

This is partially intentional. The scroll distance is not supposed to depend on the zoom factor so when you are zoomed and the rows are large, less than three lines are scrolled.

If we always scrolled three lines no matter the zoom value the scroll distance would be different when switching from one folder to the other.

See https://bugs.kde.org/show_bug.cgi?id=508290 for the bug report about the new scroll speed being slower than before. Thanks.