OSX - setMenuBar() - EXC_BAD_ACCESS error - how to re-setMenuBar()

[Santosh Reddy]

setMenuBar() of QMainWindow will take ownership of the menu and will delete it, you should not reuse it. The solution will be to create a new menu every time the focus changes and then set it as menu bar. Write a factory function to create menus, something like

createMenuBar1()
{
    QMenuBar * menu = new QMenuBar();
 
    // add actions
 
    return menu;
}
 
{
    ...
    updateMenuBar(createMenuBar1());
    ...
    updateMenuBar(createMenuBar2());
    ...
    updateMenuBar(createMenuBar3());
    ...
    updateMenuBar(createMenuBar1());
    ...
}

createMenuBar1()
{
    QMenuBar * menu = new QMenuBar();

    // add actions

    return menu;
}

{
    ...
    updateMenuBar(createMenuBar1());
    ...
    updateMenuBar(createMenuBar2());
    ...
    updateMenuBar(createMenuBar3());
    ...
    updateMenuBar(createMenuBar1());
    ...
}

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