Problem with enable method for QPushButton

[BeastBook]

Hi i want to enable button when my text fields are not empty and disable when one or both fields are empty. I tried multiple combinations with logical operators.Any idea how to deal with this

//by default it is off
confirm->setEnabled(false);
if(userTxt->text()!="" && passTxt->text()!="") //if they are not empty
{
confirm->setEnabled(true);
}

[J.Hilk]

@BeastBook

a bit complex of an example, but I wanted everything in main x)

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QWidget parent;
    parent.show();

    QLineEdit *edit1 = new QLineEdit;
    QLineEdit *edit2 = new QLineEdit;
    QPushButton *btn = new QPushButton("OK");
    btn->setDisabled(true);

    QHBoxLayout *layout = new QHBoxLayout(&parent);
    layout->addWidget(edit1);
    layout->addWidget(edit2);
    layout->addWidget(btn);

    auto check = [edit1, edit2, btn]()->void{
        btn->setDisabled(edit1->text().isEmpty() || edit2->text().isEmpty());
    };

    QObject::connect(edit1, &QLineEdit::textChanged, [=]()->void{ check();});
    QObject::connect(edit2, &QLineEdit::textChanged, [=]()->void{ check();});

    return  a.exec();
}

[BeastBook]

Thank you for this.