Qt multiple inheritance and signals

Question

I\'m having a problem with QT regarding multiple enheritance because of QObject. I know that a lot of others have the same problems but I don\'t know how I should fix it.

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Answer 1

You should use virtual inheritance.

see http://en.allexperts.com/q/C-1040/virtual-inheritance.htm

Seems like you are experiencing the diamond issue, see also:

http://www.cprogramming.com/tutorial/virtual_inheritance.html

Do it like this:

class NavigatableItem : public virtual QObject
class Button : public virtual NavigatableItem, public virtual QToolButton
class MainMenuOption : public Button