On 8/21/12 4:26 PM, Nikos Chantziaras wrote: > On 21/08/12 22:45, Stephen Chu wrote: >> On 8/21/12 3:35 PM, Christoph Feck wrote: >>> On Tuesday 21 August 2012 20:55:00 Stephen Chu wrote: >>>> Is there a way to store a 64-bit internal ID in QModelIndex? The >>>> function QModelIndex::internalId() returns a 64-bit number but >>>> there's no way to put one in. The constructor takes only a 32-bit >>>> integer. >>> >>> Try using the overload that takes the void * pointer. The return value >>> is 64 bit, because pointers can also be 64 bit, and C++ doesn't allow >>> different overloads with different return values. >> >> Thanks for the help. But my app is currently 32-bit. :( > > Would a pointer to a qint64 work?
Yes, it will. I was thinking about that but got stuck trying to figuring out how I can manage the memory since QModelIndedx does not own the object/memory pointed by the void* Say I allocate a QList<int64_t> and create indices with internal pointer pointing to elements in the list. When I need to update the model from external data, I will have to re-allocate the list and the existing pointers will be left dangling. What is the proper steps to update the model data in this case? _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
