Behaviour of tab distances

[cymed]

What is the bug or the crash?

Tab distances behave unexpectedly when combined with alignment or when there are multiple tabs in a row

Steps to reproduce the issue

Base for tests, no dynamic tab width from #59253:

format('<div style="font-weight: bold; font-size: 12px;">Reservoir %1	%2	m<sup>3</sup></div>
<div style="text-align:left;font-size: 11px;">Water level:	%3	masl</div>
<div style="text-align:left;font-size: 11px;">Chamber 1:	%4	m<sup>3</sup></div>
<div style="text-align:left;font-size: 11px;">Chamber 2:	%5	m<sup>3</sup></div>',
'Example',500,1234.56,200,300)

Example works as expected:

Adding two tabs in a row for formatting:

format('<div style="font-weight: bold; font-size: 12px;">Reservoir %1	%2	m<sup>3</sup></div>
<div style="text-align:left;font-size: 11px;">Water level:		%3	masl</div>
<div style="text-align:left;font-size: 11px;">Chamber 1:		 %4	m<sup>3</sup></div>
<div style="text-align:left;font-size: 11px;">Chamber 2:		%5	m<sup>3</sup></div>',
'Example',500,1234.56,200,300)

Result:

Altering text-align

format('<div style="font-weight: bold; font-size: 12px;">Reservoir %1	%2	m<sup>3</sup></div>
<div style="text-align:right;font-size: 11px;">Water level:	%3	masl</div>
<div style="text-align:right;font-size: 11px;">Chamber 1:	%4	m<sup>3</sup></div>
<div style="text-align:right;font-size: 11px;">Chamber 2:	%5	m<sup>3</sup></div>',
'Example',500,1234.56,200,300)

Result:

It seems that text-align and tabs are interfering

Versions

QGIS-Version	3.40.2-Bratislava
QGIS-Codeversion	14826ca
Bibliotheken
Qt-Version	5.15.13
Python-Version	3.12.8
GDAL-Version	3.9.3
PROJ-Version	9.5.0
EPSG-Registraturdatenbankversion	v11.016 (2024-08-31)
GEOS-Version	3.13.0-CAPI-1.19.0
SQLite-Version	3.46.1
PDAL-Version	2.8.1
PostgreSQL-Client-Version	16.2
SpatiaLite-Version	5.1.0
QWT-Version	6.3.0
QScintilla2-Version	2.14.1
BS-Version	Windows 11 Version 2009
Aktive Python-Erweiterungen
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
processing	2.12.99

Bibliotheken
Qt-Version
5.15.13
Python-Version
3.12.8
GDAL-Version
3.9.3
PROJ-Version
9.5.0
EPSG-Registraturdatenbankversion
v11.016 (2024-08-31)
GEOS-Version
3.13.0-CAPI-1.19.0
SQLite-Version
3.46.1
PDAL-Version
2.8.1
PostgreSQL-Client-Version
16.2
SpatiaLite-Version
5.1.0
QWT-Version
6.3.0
QScintilla2-Version
2.14.1
BS-Version
Windows 11 Version 2009

Aktive Python-Erweiterungen
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
processing
2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[nyalldawson]

#60299 has a partial fix for this (handling multiple consecutive tabs). The combination of non-left align + tab stops is not supported, as it has no real meaning (eg try to use tabs in LibreOffice writer with right aligned text -- this is also not supported).

[cymed]

#60299 has a partial fix for this (handling multiple consecutive tabs). The combination of non-left align + tab stops is not supported, as it has no real meaning (eg try to use tabs in LibreOffice writer with right aligned text -- this is also not supported).

I see your point concerning tabs and alignment - I originally hoped to bypass the limitation of not having html table handling in QGIS labels by using tabs. Closing this issue.