tray icon and all mouse events

[tdt]

Hello,
I would like to manipulate with every mousevent on tray icon (No another widget active/show)

possible ways:
1) thru installEventFitler - isnt working
2) derive my own classes (MySystemTrayIcon, and so on) - successfully running, but in my opinion isnt best way (=overload membere function QSystemTrayIconSys::winEvent)
3) thru QAbstractEventDispatcher (not tested)

I have trouble with this code (simplified) (1 way) - never reached 
bool Main::eventFilter(QObject *obj, QEvent *ev)
 
class Main:public QObject
{
...
public:
 QSystemTrayIcon* tray;
 bool eventFilter(QObject *obj, QEvent *ev);
...
}
 
 
Main::Main(QObject* parent):QObject(parent)
{
  tray=new NSystemTrayIcon();
....
  tray->installEventFilter(this);
}
 
bool Main::eventFilter(QObject *obj, QEvent *ev)
{
 qDebug()<<"event reached";
};

I have trouble with this code (simplified) (1 way) - never reached 
bool Main::eventFilter(QObject *obj, QEvent *ev)

class Main:public QObject
{
...
public:
 QSystemTrayIcon* tray;
 bool eventFilter(QObject *obj, QEvent *ev);
...
}


Main::Main(QObject* parent):QObject(parent)
{
  tray=new NSystemTrayIcon();
....
  tray->installEventFilter(this);
}

bool Main::eventFilter(QObject *obj, QEvent *ev)
{
 qDebug()<<"event reached";
};

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thanks for help and any ideas

Jindrich