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Thread: using invokeMethod for menu addAction

  1. #1

    Default using invokeMethod for menu addAction

    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
    Qt Code:
    1. blah = ui->menuCurves->addAction("ActionText");
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    with this code
    Qt Code:
    1. QMetaObject::invokeMethod(ui->menuCurves, "addAction",
    2. 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???

  2. #2
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    Default Re: using invokeMethod for menu addAction

    Using invokeMethod() with Qt::QueuedConnection does not do anything in a thread. It is just a delayed invokation. And I don't see how you'd like to access that "blah" pointer since it will only be valid after the method is executed (and only if you made the method a slot or otherwise invokable).
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