How to set object to nullptr after self deletion

Question

I have a dialog window with a class of QDialog. I declare it in the header files with:

MyDialogClass myDialogWindow = nullptr;

and create the window on runtime somewhere with

myDialogWindow = new MyDialogClass(this);

It is also delf destroying, because of it's attributes:

this->setAttribute(Qt::WA_DeleteOnClose);

Does anyone now how can I set the myDialogWindow pointer to nullptr after the self deletion without connection signals?

Thanks in advance.

Answer 1

This isn't possible without some signal or event logic. The object does not own the pointer, the pointer is pointing at the object.

However you can use a QPointer which wraps the signal handling and nulling for you.

QPointer<MyDialogClass> myDialogWindow;
myDialogWindow = new MyDialogClass(this);
myDialogWindow->setAttribute(Qt::WA_DeleteOnClose);

// some time later, check dialog has not been closed
if( ! myDialogWindow.isNull() )
{
    // do something with dialog
}