Processes the drag drop event using the filter set by the \
        setDragDropFilter
        
        :param      event | <QDragEvent>

def dragEnterEvent( self, event ):
        """
        Processes the drag drop event using the filter set by the \
        setDragDropFilter
        
        :param      event | <QDragEvent>
        """
        filt = self.dragDropFilter()
        if ( filt and filt(self, event) ):
            return
            
        super(XTableWidget, self).dragEnterEvent(event)