c++ - Title：Qt: how to translate the buttons in qmessagebox? -

i have qmessagebox this:

qmessagebox::question(this, tr("sure want quit?"),      tr("sure quit?"), qmessagebox::yes | qmessagebox::no); 

how translate yes/no word? since there no place place tr()?

this way that:

qmessagebox messagebox(qmessagebox::question,             tr("sure want quit?"),             tr("sure quit?"),             qmessagebox::yes | qmessagebox::no,             this);     messagebox.setbuttontext(qmessagebox::yes, tr("yes"));     messagebox.setbuttontext(qmessagebox::no, tr("no")); 

and show message:

messagebox.exec();