How can I simulate user interaction (key press event) in Qt ?

The user interaction key press event in Qt:

QKeyEvent *event = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Enter);
QCoreApplication::postEvent (receiver, event)

The given code answer is:

QKeyEvent *event = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Enter, Qt::NoModifier);
QCoreApplication::postEvent (receiver, event);

The no matching function for call :

QtKeyEvent::QtKeyEvent(Type type, int key)

Here is,

QtKeyEvent::QtKeyEvent(Type type, int key, Qt::KeyboardModifiers modifiers)

QKeyEvent *event = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Enter);
QCoreApplication::postEvent (receiver, event)