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#include <QtWidgets>
int main (int argc, char** argv)
{
QApplication app(argc, argv);
QWidget wgt;
QLabel* plblDisplay = new QLabel;
plblDisplay->setFrameStyle(QFrame::Box | QFrame::Raised);
plblDisplay->setLineWidth(2);
plblDisplay->setFixedHeight(50);
QLabel* plblText = new QLabel("&Text:");
QLineEdit* ptxt = new QLineEdit;
plblText->setBuddy(ptxt);
QObject::connect(ptxt, SIGNAL(textChanged(const QString$)),
plblDisplay, SLOT(setText(const QString$))
);
QLabel* plblPassword = new QLabel ("&Password:");
QLineEdit* ptxtPassword = new QLineEdit;
plblPassword->setBuddy(ptxtPassword);
ptxtPassword->setEchoMode(QLineEdit::Password);
QObject::connect(ptxtPassword, SIGNAL(textChanged(const QString$)),
plblDisplay, SLOT(setText(const QString$))
);
//Layout setup
QVBoxLayout* pvbxLayout = new QVBoxLayout;
pvbxLayout->addWidget(plblDisplay);
pvbxLayout->addWidget(plblText);
pvbxLayout->addWidget(ptxt);
pvbxLayout->addWidget(plblPassword);
pvbxLayout->addWidget(ptxtPassword);
wgt.setLayout(pvbxLayout);
wgt.show();
return app.exec();
}