Question

I have an inherited QTreeWidget (called PackList) class and its parent is a KXmlGuiWindow. How can I access to the parent’s slots?

I’ve tried getParent()->mySlot() from the QTreeWidget class but I’ve got

error: no matching function for call to 'PackList::mySlot()' 

Does anybody know the correct way? Thanks

Answer 1

If you know the parent’s class, you will have to cast parentWidget() to that class and then call your slot. Keep in mind whether or not it’s a slot makes no difference in this case. You are just calling a method.

((KXmlGuiWindow*)parentWidget())->mySlot(); 

You can make the call without casting by wiring up your signal to the slot.

connect( this, SIGNAL(mySignal()), parentWidget(), SLOT(mySlot()) ); 

Lastly, you can use QMetaObject::invokeMethod to call it if you don’t want to cast it. That’s probably overkill.