using invokeMethod for menu addAction

[dwizard]

For various reasons I would like to move my creation of menu actions to a thread. I thought I should be able to do this with "invokeMethod", but I am having problems.

Essentially, I would like to replace this code

blah = ui->menuCurves->addAction("ActionText");

blah = ui->menuCurves->addAction("ActionText");

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with this code

QMetaObject::invokeMethod(ui->menuCurves, "addAction",
       Qt::QueuedConnection, Q_RETURN_ARG(QAction*, blah), Q_ARG(QString, "ActionText"));

QMetaObject::invokeMethod(ui->menuCurves, "addAction",
       Qt::QueuedConnection, Q_RETURN_ARG(QAction*, blah), Q_ARG(QString, "ActionText"));

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Using invokeMethod, the code runs but 'blah' is not a valid pointer and nothing is added to the 'menuCurves' menu.

I feel like I am close, but what is wrong???