Qt tr for internationalisation does not work in main function?

Question

Qt's translation function tr does not work in the main function but works fine in a QWidget member function. Why is that?

int main(int argc, char *argv[]) {      QApplication a(argc, argv);     QDialog dialog;      QString temp = tr("dadasda");//error:tr was not declared in this scope     dialog.show();     return a.exec(); } 

Answer 1

The translation function tr is a static method of QObject. Since QWidget is a subclass of QObject, tr is available in methods of QWidget, but in main() you have to use QObject::tr in order to use the function, as shown below.

#include <QObject> int main(int argc, char *argv[]) {        QApplication a(argc, argv);     QDialog dialog;      QString temp = QObject::tr("dadasda");//works fine     dialog.show();     return a.exec(); }