The solution is using the setFont()
method of the QMessageBox
QMessageBox *msg = new QMessageBox(QMessageBox::Information, "Message with font",
"This message is in font: " + ui->comboBox->currentText(),
QMessageBox::Ok | QMessageBox::Cancel, this);
QFont font = QFont(ui->comboBox->currentText());
msg->setFont(font);
msg->exec();
Where combobox
is QComboBox
used.