connect(this, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(showContextMenu(const QPoint&)));
#if defined Q_WS_QWS || defined Q_WS_X11
connect(this, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(showContextMenu(const QPoint&)));
#if defined Q_WS_QWS || defined Q_WS_X11