How to place an icon onto a QLineEdit?

Question

There is a Search field with the magnification-lens and a greyed out \"search\" keyword at the top right corner of stackoverflow.com web site:

Answer 1

QT5 addAction

```

const QIcon passwordIcon(":/new/icons/res/passwd.png");
ui->password->setClearButtonEnabled(true);
ui->password->addAction(passwordIcon, QLineEdit::LeadingPosition);

```