Qt application with dinamic language (QTranslator) does not work

Diego Donate

I have a Qt application and I need to change language at runtime. I am using QTranslator and .qm files. The language is loaded properly but my widgets don't show the text.

Y have 'MyClass..cpp' (inherits QMainWindow):

MyClass::MyClass()
{
   ...
   selectLanguage("en");

   m_pLabel = new QLabel(tr("User"));
   m_pLabel->show();
   ...
}

void MyClass::selectLanguage(QString language) {

   QString sTranslationFile = QString("texts_%1").arg(language);

   QTranslator translator;
   //translator.load(":/translations/" + sTranslationFile);
   translator.load(sTranslationFile, ":/translations/");

   if (qApp->installTranslator(&translator))
       qDebug() << "Ok";
 }

 void MyClass::changeEvent(QEvent *pEvent)
 {
     if(pEvent)
     {
         switch(pEvent->type())
         {
               case QEvent::LanguageChange:
                  retranslate();
                  break;
           }
     }

     QMainWindow::changeEvent(pEvent);
 }

 void MyClass::retranslate()
 {
  qDebug() << "retranslate";

  if (m_pLabel)
     m_pLabel->setText(tr("User"));
 }

In 'myProject.pro':

 ...
 QMAKE_POST_LINK = lrelease.exe myProject.pro
 ...
 RESOURCES += \
     resources/resources.qrc

 TRANSLATIONS += resources/translations/texts_en.ts \
                 resources/translations/texts_es.ts
 ...
 DISTFILES += \
      ...
      resources/translations/texts_en.qm \
           resources/translations/texts_es.qm

In 'resources.qrc':

 ...
 translations/texts_en.qm
 translations/texts_es.qm

In 'texts_en.ts':

 <!DOCTYPE TS><TS>
 <context>
     <name>MyClass</name>
     <message>
         <source>User</source>
         <translation>UserEn</translation>
     </message>
     <message>
         <source>Group</source>
         <translation>GroupEn</translation>
     </message>
 </context>
 </TS>

Language is loaded ("Ok" appears) and "retranslate" is called, but the label does NOT show "UserEn", but "User"...

I call 'selectLanguage("es")' after a while, but the same...

I hope somebody could help me.

Thanks in advance,

Diego

oberluz

@Diego-Donate said:

translator.load(sTranslationFile, ":/translations/");

How do you know the language loaded properly if you didn't test the return value of translator.load?