Bug 415546

Summary:	Cannot scroll horizontally with mousewheel since Qt 5.14
Product:	[Applications] dolphin	Reporter:	Justin Morgan <carmaferris>
Component:	view-engine: compact mode	Assignee:	Dolphin Bug Assignee <dolphin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	arojas, elvis.angelaccio, fabian, gudvinr+kde, kde, kfm-devel, nate, quwenruo.btrfs, stenzi
Priority:	NOR
Version:	19.12.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
See Also:	https://bugreports.qt.io/browse/QTBUG-81007
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Justin Morgan 2019-12-25 09:22:12 UTC

SUMMARY
Since upgrading to 19.12 on Arch Linux, scrolling horizontally with the mousewheel (in compact view) is broken

STEPS TO REPRODUCE
1. When a horizontal scrollbar is visible, scroll the mousewheel

OBSERVED RESULT
Doesn't scroll

EXPECTED RESULT
Scrolling as in previous versions of Dolphin

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux 5.4.6
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 5.14

ADDITIONAL INFORMATION

Comment 1 Martin Droessler 2019-12-25 13:00:00 UTC

Same here - also using Arch Linux.

Using the touchpad of the Laptop, I'am able to scroll horizontally. But not with the mousewheel.


VERSIONS:
Plasma: 5.17.4
Frameworks: 5.65.0
Applications: 19.12.0
QT: 5.14

Comment 2 Nate Graham 2019-12-25 16:41:52 UTC

Scrolling horizontally using a mousewheel requires holding down the Alt key while turning the wheel. It's this way in all Qt and KDE software.

Comment 3 Martin Droessler 2019-12-25 17:01:04 UTC

Was there a change in Frameworks or QT lately?
Because on my other machine, thats not quite up2date, horizontal scrolling in Dolphin works without pressing the Alt key.

The only difference in Versions is:
Frameworks: 5.64.0
QT: 5.13.2

Comment 4 Nate Graham 2019-12-25 17:03:34 UTC

Not to my knowledge. Can you clarify *where* in Dolphin you are scrolling horizontally? The places panel? The main view? If so, what view mode are you using? Details, icons, or compact?

Comment 5 Martin Droessler 2019-12-25 18:34:34 UTC

Compact view mode in the main view - just as the issue opener described.
In the other view modes, the content is aligned in a downward fashion, so horizontal scrolling is not required.

Comment 6 Nate Graham 2019-12-25 18:56:51 UTC

Weird, this works fine for me when using Compact mode with Dolphin from 19.12 or git master, with Qt 5.13.1. A regular scroll goes horizontally without needing to hold down the Alt key.

I wonder if this is a Qt 5.14 regression.

Comment 7 Fabian Vogt 2019-12-26 00:00:24 UTC

I can confirm that it's broken with Dolphin 19.12 + Qt 5.14.0, but works with Dolphin 19.12 + Qt 5.13.1. So likely a change/bug in Qt indeed.

Comment 8 Antonio Rojas 2019-12-26 11:58:07 UTC

*** Bug 415578 has been marked as a duplicate of this bug. ***

Comment 9 Nate Graham 2019-12-26 15:32:53 UTC

Does anyone have a Qt bug report handy?

Comment 10 Elvis Angelaccio 2019-12-29 11:41:51 UTC

Not a dolphin bug. All Qt apps seems to be affected.

I filed an issue upstream: https://bugreports.qt.io/browse/QTBUG-81007

Comment 11 gudvinr+kde 2019-12-30 13:41:48 UTC

Horizontal scroll wheel (if you have one) works thought.