On Thu, Mar 01, 2012 at 01:34:04PM -0800, Jason H wrote: > So I have a QObject-derived object tree, like a QObject* tree; I made > everything QSharedObject<QObject> accordingly.
Why? QObject ownership is typically handled easily using the parent-child relationship. Give your objects a parent object and forget about their individual lifetime. Manage only the parent object's lifetime. > (I'll just use QObject in this email) > > I have a recursive query function. I want to use QSharedPointers so that I > don't give the pointer directly to the tree because someone might delete it. Who is "someone", and why may he delete an object that is passed for inspection? > (ignoring data(), because at that point in time I can consider it > intentional) A 'delete p;' is exactly as intentional as a 'delete p.data();' A shared pointer does not increase safety in this case. > However I hit a problem in my recursive search function > QSharedObject<QObject> QObject::search() when I go to add "this" item > to the result set, I can only add "this" as a QObject* not > QSharedPointer<this>. > How do I work around "this"? Establish a clear concept of ownership for your objects and make sure the query function sticks to it, i.e. does not delete things randomly. I don't think you will still need shared pointers for the task afterwards. Andre' _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
