What's the problem with having a property that needs to be handed over to Qt? If you don't want to do that, noone forces you to use the property. But if someone actually wants to do so I don't think we should forbid that.
What's the problem with having a property that needs to be handed over to Qt? If you don't want to do that, noone forces you to use the property. But if someone actually wants to do so I don't think we should forbid that.