Utf-8 coding problem

[mkolenda]

QMessageBox::information(this,"","ł"); is greeting me with ł character.
The same problem exists in table headers and other places. I've solved it there by using deprecated trUtf8() function.

What is wrong? How to deal with that?

[sierdzio]

Which compiler are you using? Is your source file encoded using UTF-8?

[mkolenda]

@sierdzio
Qt Creator 2.8.1
Qt 4.8.6
GCC 4.8.4, 64 bit

user@linux$ file *.cpp LabWareHouse.pro
database.cpp:                             C source, ASCII text
databaseinfo.cpp:                         C source, ASCII text
databasemanager.cpp:                      C source, UTF-8 Unicode text
dialog_bladsql.cpp:                       C source, ASCII text
dialog_dodajpojemnik.cpp:                 C source, UTF-8 Unicode text
dialog_dodajprzestrzenmagazynowa.cpp:     C source, ASCII text
dialog_dodajsubstancje.cpp:               C source, UTF-8 Unicode text
dialog_generujraport.cpp:                 C source, ASCII text
dialog_historiapojemnika.cpp:             C source, ASCII text
dialog_odzyskajpliki.cpp:                 C source, UTF-8 Unicode text
dialog_oprogramie.cpp:                    C source, ASCII text
dialog_updateprogram.cpp:                 C source, ASCII text
dialog_zmianastanupojemnika.cpp:          C source, ASCII text
ikonazapisu.cpp:                          C source, ASCII text
main.cpp:                                 C source, ASCII text
mainwindow.cpp:                           C source, UTF-8 Unicode text
moc_databasemanager.cpp:                  C source, ASCII text
moc_dialog_bladsql.cpp:                   C source, ASCII text
moc_dialog_databasewizard.cpp:            C source, ASCII text
moc_dialog_dodajpojemnik.cpp:             C source, ASCII text
moc_dialog_dodajprzestrzenmagazynowa.cpp: C source, ASCII text
moc_dialog_dodajsubstancje.cpp:           C source, ASCII text
moc_dialog_generujraport.cpp:             C source, ASCII text
moc_dialog_historiapojemnika.cpp:         C source, ASCII text
moc_dialog_oprogramie.cpp:                C source, ASCII text
moc_dialog_zmianastanupojemnika.cpp:      C source, ASCII text
moc_mainwindow.cpp:                       C source, ASCII text
modelmanager.cpp:                         C source, UTF-8 Unicode text
qrc_resources.cpp:                        Qt C-code resource file, ASCII text
utils.cpp:                                C source, ASCII text
LabWareHouse.pro:                         ASCII text

mainwindow.cpp which contains this unlucky string is UTF-8 encoded

[Huulivoide]

If I'm not completely mistaken Qt 4.8 does not assume c-strings to be in UTF-8 by default,
but instead assumes they are in the systems default encoding. Have you tried with:
QString::fromUtf8("mystring");?