Set the QT right-click Pop-up menu option to unavailable (gray)

A sudden exposure to QT development, in the design of the interface, the Treewidget right-click menu has been designed, can not be changed, and the menu subkey needs to set some right-click option is not available. After a variety of design, finally found that QT has been packaged, the implementation process is as follows:

Qaction *clinkaction = new Qaction (ui->treewidget_2);

Clinkaction->settext ("Connection");

Cmenu->addaction (clinkaction);

Clinkaction->setenabled (FALSE); Turn the menu bar gray to not available

When set, the last option in the right-click menu is not available. The picture is not very clear, pay attention to see it.