QLineEdit emits editingFinished() when readOnly

A QLineEdit emits editingFinished() signals even when set to readOnly(true) which it surely should not do as read-only.

Try the following snippet:

QLineEdit* l = new QLineEdit();
 CHECK_TRUE(connect(l, &QLineEdit::editingFinished, this, [&](){ qDebug() << "Hello!"; }));
 l->setReadOnly(true);
 l->show();

Run it, then click the line edit (giving it focus) then click somewhere else (removing focus from line edit). You will see a "Hello!" in the output console which means the signal was emitted.