Connecting tableWidget signal and external slot

[qutron]

Hi there!
I want to connect cellDoubleClicked() from tableWidget to custom slot.
In my main.cpp i have instance of QMainWindow class - window.
I tried

QObject::connect( window, SIGNAL(cellClicked(int, int)),window, SLOT(onCellClicked(int, int)));

QObject::connect( window, SIGNAL(cellClicked(int, int)),window, SLOT(onCellClicked(int, int)));

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but it doesn't work. onCellClicked(int, int) is my custom slot. Any suggestions?