QAction и горячие клавиши

class DataTableCommonWidgetClass : public QWidget
{
    Q_OBJECT
public:
    QMenu *menu;
private slots:
    void ShowContextMenu (QPoint pos);
}

DataTableCommonWidgetClass::DataTableCommonWidgetClass(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::DataTableCommonWidgetClass)
{
    ui->setupUi(this);
 
    menu = new QMenu;
    this->setContextMenuPolicy(Qt::CustomContextMenu);
    connect(this, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT (ShowContextMenu(QPoint)));
}
 
void DataTableCommonWidgetClass::ShowContextMenu (QPoint pos)
{
    QPoint globalPos;
    if (sender()->inherits("QAbstractScrollArea"))
        globalPos = ((QAbstractScrollArea *) sender())->viewport()->mapToGlobal(pos);
    else
        globalPos = ((QWidget *) sender())->mapToGlobal(pos);
 
    menu->addAction(ui->actAddFiles);
    menu->addAction(ui->actRemoveSelected);
    menu->exec(globalPos);
}

    this->addAction(ui->actRemoveSelected);
    this->addAction(ui->actAddFiles);