楼主是不是要这个?
Qt4.0里面是这样
void test31::contextMenuEvent( QContextMenuEvent * e  )
{
       QMenu contextMenu(this);    // Qt3.X里面用QPopupMenu
       contextMenu.addAction("Cut");
       contextMenu.addAction("Copy");
       contextMenu.addAction("Paste");
       contextMenu.exec(e->globalPos());
}