Bug 436993

Summary:	QGroupBox with no title takes too much space
Product:	[Plasma] Breeze	Reporter:	krzmbrzl
Component:	QStyle	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	nate, noahadvs, uhhadd
Priority:	NOR
Version First Reported In:	5.21.4
Target Milestone:	---
Platform:	Other
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=498582
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description krzmbrzl 2021-05-12 19:03:19 UTC

SUMMARY
When creating a QGroupBox in a Qt application running on KDE using the default style, the box will allocate space for the box's title even if there is none

STEPS TO REPRODUCE
1. Create QGroupBox without a title

EXPECTED RESULT
QGroupBox resizing to skip the space normally reserved for the title.


SOFTWARE/OS VERSIONS

Operating System: KDE neon 5.21
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.82.0
Qt Version: 5.15.2
Kernel Version: 5.4.0-59-generic
OS Type: 64-bit
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-4770 CPU @ 3.40GHz
Memory: 15,6 GiB of RAM
Graphics Processor: GeForce GTX 660 Ti/PCIe/SSE2

ADDITIONAL INFORMATION
This is the same issue as was reported to Qt for their Fusion style: https://bugreports.qt.io/browse/QTBUG-86411
And this was the fix for it: https://codereview.qt-project.org/c/qt/qtbase/+/314739
I would assume that maybe the same patch could be applied to KDE's styles.

Note also that I am using the Breeze theme which is why I filed the issue against that. I don't know though if that is actually responsible for this.

Comment 1 Janet Blackquill 2022-02-23 19:35:32 UTC

Do you have an example application which uses this and is broken? FWIW, we've had the code to not do this since 2017, so it should be working as intended.

Comment 2 krzmbrzl 2022-02-24 07:10:58 UTC

The issue appeared in the development of the Mumble software. However, I worked around this issue by now.

From what I recall the issue really was as easy to reproduce as creating a QGroupBox without a title and then observing that actually it still allocates space for where the title usually goes.

Comment 3 Bug Janitor Service 2022-03-11 04:35:35 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
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