focusInEvent not call for QLineEdit

Hi,
I have a subclassed QLineEdit added to a GraphicsScene and a focusInEvent associated to it.
However the focusInEvent is never called. I tried adding an event filter, but without success.
.h

Code:

---

class myQLineEditClass : public QLineEdit
{
    Q_OBJECT
public:
    myQLineEditClass();
    virtual	~myQLineEditClass() {};
 
protected:
    void focusInEvent(QFocusEvent *e);
    void focusOutEvent(QFocusEvent *e);
    bool eventFilter(QObject *obj, QEvent *event);
};

---

.cpp:

Code:

---

bool myQLineEditClass::eventFilter(QObject *obj, QEvent *event)
{
    MGlobal::displayInfo(MQtUtil::toMString(QString().sprintf("EVENT FILTER")));
 
    if (event->type() == QEvent::FocusIn)
    {
        return true;
    }
 
    return QObject::eventFilter(obj, event);
}
void myQLineEditClass::focusInEvent(QFocusEvent *e)
{
    MGlobal::displayInfo(MQtUtil::toMString(QString().sprintf("FOCUS IN")));
    QLineEdit::focusInEvent(e);
}
 
void myQLineEditClass::focusOutEvent(QFocusEvent *e)
{
    MGlobal::displayInfo(MQtUtil::toMString(QString().sprintf("FOCUS OUT")));
    QLineEdit::focusOutEvent(e);
}
 
/.../
                                myQLineEditClass *qledit=new myQLineEditClass(oneNode);
                                scene()->addWidget(qledit);
                                qledit->installEventFilter(oneNode);

---

However neither EVENT FILTER, nor FOCUS IN, nor FOCUS OUT are ever called with I double-click on the QLineEdit. How come ?
Thanks.