Layer Properties dialogue: Various issues when resizing tabs

[beyhh]

What is the bug or the crash?

It is not possible to resize the "Labels" in the layer properties window in order to show not only the icon, but also the tab's label. This happens when on the Labels tab, "Single Labels" is selected. Trying to resize the "Labels" tab with "Single Labels" selected makes the entire tab bar disappear. The window needs to be resized to make the tab bar appear again.

Dragging the tab bar:

Will give:

Having resized a different tab, the tab bar ignores the setting and collapses to show only the icon as soon as one activates the "Labels" tab.

Steps to reproduce the issue

• Open Layer Properties dialogue
• Activate the "Labels" tab and choose "Single Labels"
• Activate "Symbology" tab
• Resize the tab "Symbology" to show not only the icon but also the tab label
• Now (re-)activate "Labels" tab
• Try to resize the "Labels" tab while being active

Similarly weird behaviour:

• Resize the "Symbology" (or any other) tab to show the tab's label
• Now change to different tabs: Diagrams and Attribute Forms cause a resize of the tab bar which other tabs don't do. Trying to resize Diagrams and _AttributeForms in is not possible, irrespective of the mode of labeling selected.

Versions

QGIS version | 3.28.5-Firenze | QGIS code revision | 50adba36f2 -- | -- | -- | -- Qt version | 5.15.3 Python version | 3.9.5 GDAL/OGR version | 3.6.3 PROJ version | 9.2.0 EPSG Registry database version | v10.082 (2023-02-06) GEOS version | 3.11.2-CAPI-1.17.2 SQLite version | 3.41.1 PDAL version | 2.5.2 PostgreSQL client version | unknown SpatiaLite version | 5.0.1 QWT version | 6.1.6 QScintilla2 version | 2.13.1 OS version | Windows 10 Version 2009   |   |   |   Active Python plugins db-style-manager | 0.8 DigitizingTools | 1.5.2 latlontools | 3.6.9 layerGroupFilter | 0.2 mmqgis | 2021.9.10 multiple_layers_tools | 1.2 postgis_geoprocessing | 0.9 quick_map_services | 0.19.33 shapetools | 3.4.11 splitmultipart | 1.0.0 db_manager | 0.1.20 grassprovider | 2.12.99 processing | 2.12.99 sagaprovider | 2.12.99 QGIS version 3.28.5-Firenze QGIS code revision [50adba36f2](https://github.com/qgis/QGIS/commit/50adba36f2) Qt version 5.15.3 Python version 3.9.5 GDAL/OGR version 3.6.3 PROJ version 9.2.0 EPSG Registry database version v10.082 (2023-02-06) GEOS version 3.11.2-CAPI-1.17.2 SQLite version 3.41.1 PDAL version 2.5.2 PostgreSQL client version unknown SpatiaLite version 5.0.1 QWT version 6.1.6 QScintilla2 version 2.13.1 OS version Windows 10 Version 2009 Active Python plugins db-style-manager 0.8 DigitizingTools 1.5.2 latlontools 3.6.9 layerGroupFilter 0.2 mmqgis 2021.9.10 multiple_layers_tools 1.2 postgis_geoprocessing 0.9 quick_map_services 0.19.33 shapetools 3.4.11 splitmultipart 1.0.0 db_manager 0.1.20 grassprovider 2.12.99 processing 2.12.99 sagaprovider 2.12.99 ### Supported QGIS version - [X] I'm running a supported QGIS version according to the roadmap. ### New profile - [X] I tried with a new QGIS profile ### Additional context _No response_

[agiudiceandrea]

@beyhh could you please actually try if the issue does occur using a new QGIS user profile without any external plugin installed?

[beyhh]

With new QGIS Profile and all Plugins disabled, I still have an issue with the Diagrams tab and the Attribute Form tab. These tabs resize unexpectedly.

[agiudiceandrea]

I can confirm the horizontal resizing issue with "Diagrams" and "Attribute Form" tabs. I'll add that a vertical resizing issue occurs with the "Legend" tab.

[beyhh]

I found out that the issue with tabs "Diagrams" and "Attribute Form" occurs only if the overall properties window relatively narrow. In my QGIS 3.28.10 I have the issue when the properties window is 864 pixels wide.