Is there a way to access QMainWindowPrivate or QMainWindowLayout?-CodePudding

I'm using Qt5 and I am trying to do this:

setCentralWidget(wid);
...
setCentralWidget(nullptr); // i don't want it to do deleteLater() for my wid variable
...
setCentralWidget(wid);

The problem is that, when I call setCentralWidget(nullptr), it does deleteLater() for my wid variable.

So, I found a way to use setCentralWidget() without deleting the wid variable:

Q_D(QMainWindow);
d->layout->setCentralWidget(nullptr);

But the question is: How to use private headers or widgets or whatever? I mean, I don't have access to QMainWindowPrivate or QMainWindowLayout, because they are private. So is there a way to access them?

CodePudding user response：

OP's issue is caused by using setCentralWidget(nullptr);.