context menu for table

[sattu]

hi everyone,
I create a context menu for a dialog .It is working fine.But my problem is to restrict within the table view.

QMenu menu(this);
menu.addAction(deleteAct);
menu.exec(event->globalPos());

QMenu menu(this);
menu.addAction(deleteAct);
menu.exec(event->globalPos());

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Here i am using globalpos() .but i dont know what to use to restrict it.

plz gvie some soln.