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TableView->setMouseTracking(true);
TableView->installEventFilter (new TMMW(TableView));

Вернее ловится но раз из 100-1000!

C++ (Qt)
class TMMW : public QObject
{
    Q_OBJECT
 
public:
  TMMW(QObject *parent) : QObject(parent) {}
  virtual ~TMMW() {}
 
  virtual bool eventFilter ( QObject * watched, QEvent * event);
};
 
bool TMMW::eventFilter (QObject * watched, QEvent * event) {
  QAbstractItemView* View = qobject_cast<QAbstractItemView*>(watched);
  if(!View) {return false;}
  if (event->type() == QEvent::MouseMove) {
    QMessageBox msgBox;
    msgBox.setText("QEvent::MouseMove");
    msgBox.setIcon(QMessageBox::Information);
    msgBox.exec();
  }  
  return false;
}
 
 

как-то так наверн:
TableView->viewport()->installEventFilter (new TMMW(TableView));

Спасибо!
Вот что получилось:

C++ (Qt)
TableView->viewport()->setMouseTracking(true);
TableView->viewport()->installEventFilter(new TMMW(TableView));
 
bool TMMW::eventFilter (QObject * watched, QEvent * event) {
  QWidget* Widget = qobject_cast<QWidget*>(watched);
  if(!Widget) {return false;}
  QAbstractItemView* View = qobject_cast<QAbstractItemView*>(Widget->parent());
  if(!View)   {return false;}
  if (event->type() == QEvent::MouseMove) {
    QMouseEvent* e = (QMouseEvent*)event;
    QModelIndex ModelIndex = View->indexAt(e->pos());
    if(ModelIndex.column() != 1 || ModelIndex.row() != 4) {return false;}
    QMessageBox msgBox;
    msgBox.setText("QEvent::MouseMove");
    msgBox.setIcon(QMessageBox::Information);
    msgBox.exec();
  }  
  return false;
}