System (LC_NUMERIC) decimal separator not honored

[Nicolas Goy]

When using the fr_CH.UTF-8 value for LC_NUMERIC the decimal separator is set to , instead of ..

I double checked and my system is configured properly, the decimal separator is . in my locale:

env LC_NUMERIC=fr_CH.UTF-8 printf "%'.3f\n" 12345678.901 -> 12'345'678.901

If I start speedcrunch with the en_US.UTF-8 locale, I get the . separator, so speedcrunch is affected by LC_NUMERIC somehow.

I can workaround by overriding the decimal separator in the menu (as per https://bitbucket.org/heldercorreia/speedcrunch/issues/827/comma-decimal-separator ).

Using v0.12

[Felix Krull]

We get the decimal separator for a locale from Qt. I also get , as a decimal separator for fr_CH on Fedora 28 with Qt 5.10. If that's wrong, I think your best bet is to report a bug with Qt itself: https://bugreports.qt.io/secure/Dashboard.jspa

[Nicolas Goy]

Yeah that's wrong, it should be a dot. But that's weird because speedcrunch is the only qt app showing this bug. I'll try to make a bug report upstream.

[Felix Krull]

It's weird that other Qt apps behave differently. I ran some more experiments; Fedora 28, Qt 5.10, both Qt and Speedcrunch from the normal repositories:

[vagrant@fedora28 ~]$ LC_NUMERIC=de_DE python3 -c "from PyQt5.QtCore import QLocale; print(QLocale().decimalPoint())"
,
[vagrant@fedora28 ~]$ LC_NUMERIC=en_GB python3 -c "from PyQt5.QtCore import QLocale; print(QLocale().decimalPoint())"
.
[vagrant@fedora28 ~]$ LC_NUMERIC=de_CH python3 -c "from PyQt5.QtCore import QLocale; print(QLocale().decimalPoint())"
.
[vagrant@fedora28 ~]$ LC_NUMERIC=fr_CH python3 -c "from PyQt5.QtCore import QLocale; print(QLocale().decimalPoint())"
,

Qt evidently honours LC_NUMERIC in some fashion; it's just of the opinion that fr_CH uses , (but de_CH is .) so there's probably some data error somewhere. If I run Speedcrunch with LC_NUMERIC and decimal separator set to System Default, it uses the same character. So I think this is conclusively a bug in Qt (or their underlying locale data).

[Nicolas Goy]

Just for reference, I realized the bug was introduced with qt5

LC_NUMERIC=fr_CH python3 -c "from PyQt4.QtCore import QLocale; print(QLocale().decimalPoint())" 
.

That's why the other qt app I was using were not showing this bug, they use qt4.