i need to use Alt+Ctrl+arrow keys combination

[prasad.ece2]

i need to use Alt+Ctrl+arrow keys on custamised QGraphicsItem, i have tried below one, not working can any one suggest me better one

void CBoxViewItem::keyPressEvent(QKeyEvent* f_event)   //CBoxViewItem derived from Qgraphicsitem
{
    if(Qt::ControlModifier & Qt::AltModifier & f_event->modifiers())        //  i tried this also if( (Qt::ControlModifier && Qt::AltModifier) == f_event->modifiers()) 
    {
        qDebug()<<"ctrl+Alt";
 
        switch(f_event->key())
        {
            case Qt::Key_Up:
 
                break;
            case Qt::Key_Down:
 
                break;
            case Qt::Key_Left:
 
                break;
            case Qt::Key_Right:
 
                break;
    }
 }

void CBoxViewItem::keyPressEvent(QKeyEvent* f_event)   //CBoxViewItem derived from Qgraphicsitem
{
    if(Qt::ControlModifier & Qt::AltModifier & f_event->modifiers())        //  i tried this also if( (Qt::ControlModifier && Qt::AltModifier) == f_event->modifiers()) 
    {
        qDebug()<<"ctrl+Alt";

        switch(f_event->key())
        {
            case Qt::Key_Up:
               
                break;
            case Qt::Key_Down:
               
                break;
            case Qt::Key_Left:
                
                break;
            case Qt::Key_Right:
                
                break;
    }
 }

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