C++ - Why do I create these widgets on the heap?

Question

When creating a GUI with C++ and Qt you can create a label for example like this :

QLabel* label = new QLabel(\"Hey you!\", centralWidgetParent);
         


        

Answer 1

Another thing to keep in mind is that Qt uses the so called pimpl paradigm where object data is implicitly shared and managed behind the class you actually instantiate. See here: http://qt-project.org/wiki/Dpointer

The bottom line is that if you are allocating on the stack in order to avoid using the heap, Qt is just pulling a fast one on you and using the heap anyway.