QT: Context menu (QMenu) reference from the QTableWidget

I want to add a submenu in my context menu which is created like this:

self.widget_alignment.setContextMenuPolicy(Qt.ActionsContextMenu)

where widget_alignment is QTableWidget.

I created a new QMenu instance:

exchange_bases_menu = QMenu(self.widget_alignment)

added some actions, and I found a method QAction QMenu.addMenu (self, QMenu menu)

but I don't see any reference to the default context menu for self.widget_alignment. Additionally, this code:

self.widget_alignment.addMenu(exchange_bases_menu)

gave me: QTableWidget object has no attribute addMenu.

How can I add my submenu to the default context m开发者_运维百科enu?

According to the documentation, when a QWidget is set to have the actions context menu type, the widget will construct a context menu based on the list of actions set for the widget. To modify the list of actions, you can call addAction, insertAction, or removeAction. So I would expect you could do something like this (in C++):

QAction *act_p = new QAction( "Has Submenu", widget_alignment );
QMenu *submenu_p = new QMenu( act_p );
// Add items to the submenu
act_p->setMenu( submenu_p );
widget_alignment->addAction( act_p );

Without trying it myself, I would expect this to add a "Has Submenu" option to the bottom of the context menu that is generated for the widget, with the submenu you created as the submenu shown.

What about using QMenu's popup() in MouseReleaseEvent?

if (pEvent->button() == Qt::RightButton)
{
    QMenu menu;
    menu.addAction(action1);
    menu.addAction(action2);
    menu.popup(pEvent->globalPos(),action1);
}