How do I do a dynamic_cast on a QSharedDataPointer?

twodee

Based on the suggestions on my last post, I have started using QSharedDataPointers instead of QList<Class*>, but this has brought up a new problem while trying to dynamic_cast data to this type.

I have a QList<QGraphicsItem*>::iterator itr

Layer* l = dynamic_cast<Layer*>(*itr);

I am trying to do something like:

Layer::LayerPointer l = dynamic_cast<Layer::LayerPointer>(*itr);

LayerPointer has been defined here:

typedef QSharedDataPointer<Layer> LayerPointer;

For obvious reasons I am getting a "Cannot dynamic_cast... target is not pointer or reference"

mrjj

Hi
you can use
~~http://doc.qt.io/qt-5/qshareddatapointer.html#data~~
http://doc.qt.io/qt-5/qshareddatapointer.html#constData
to get type T ( the actual pointer )
( there might be better way)
Im wondering however if dynamic_cast is right to use and not
qgraphicsitem_cast ?