QModelIndex/QAIM: improve const correctness

QAIM::createIndex() takes a non-const void*. It's
typically called from inside QAIM::index(), which is a
const member function. If the data storage wrapped
by the model is const correct, it means that we have
to drop constness somewhere before calling createIndex().

To support this: change createIndex() to take a
const void * instead. This is painless.

Accessing the pointer is a bit more troubling, because
the accessor (QModelIndex::internalPointer()) returns
void *. (Effectively, now it does a const_cast...).
To avoid a massive source break, I've left it alone,
and instead added another function to retrieve a
const void *.

Read-only models can now be fully (deep) const correct.

[ChangeLog][QtCore][QAbstractItemModel] The
createIndex() function now takes a const void *, rather
than a void *.

[ChangeLog][QtCore][QModelIndex] Added the
constInternalPointer() function, to retrieve the
internal pointer as a pointer-to-const.

Change-Id: I108912b6814fcd5fe0c5cb7db6c721ba51e83de0
Reviewed-by: Samuel Gaist <samuel.gaist@idiap.ch>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

0 files changed, 0 insertions, 0 deletions