Overloads when a mouse press occurs.  If in editable mode, and the
        click occurs on a selected index, then the editor will be created
        and no selection change will occur.
        
        :param      event | <QMousePressEvent>

def mouseDoubleClickEvent(self, event):
        """
        Overloads when a mouse press occurs.  If in editable mode, and the
        click occurs on a selected index, then the editor will be created
        and no selection change will occur.
        
        :param      event | <QMousePressEvent>
        """
        item = self.itemAt(event.pos())
        column = self.columnAt(event.pos().x())
        
        mid_button = event.button() == QtCore.Qt.MidButton
        ctrl_click = event.button() == QtCore.Qt.LeftButton and \
                     event.modifiers() == QtCore.Qt.ControlModifier
        
        if mid_button or ctrl_click:
            self.itemMiddleDoubleClicked.emit(item, column)
        elif event.button() == QtCore.Qt.RightButton:
            self.itemRightDoubleClicked.emit(item, column)
        else:
            super(XTreeWidget, self).mouseDoubleClickEvent(event)