[Qt-interest] Is child object guaranteed to be delete when its parent destroy?

[Kermit Mei]

On Sat, 2009-03-28 at 09:13 +0100, Andreas Pakulat wrote:
> On 28.03.09 11:34:47, Kermit Mei wrote:
> > Hello community!
> > 
> > I always consider that if a parent object calls deleteLater(), then all
> > of its children will delete automatically. But I can't understand what I
> > encouterred today. To represent it simply, for example:
> > 
> > A，B，C are all QWidget's sub-classes, and they are different. Now, in
> > the defination of A's method, I create a B's object:
> > 
> > A::fooA() {
> >   pB = new B(this);
> > }
> > 
> > And later, I pass pB to a QStackedWidget's Object, and add it to the
> > stacked-object.
> 
> With that you're giving away pB to the stackwidget. The stackwidget
> takes ownership of the widgets in its stack, so the parent of pB is
> changed to be the stackwidget.
> 
> > I know I can delete it in ~A(), but I wonder to know why it can't delete
> > it self when A was deleted? It is a child of, isn't it? 
> 
> Because A is not the parent anymore.
> 
> Andreas

Yes, I see. Thanks;p