How to create a QWindow that only behave according to MainWindow?

[Isolde]

For example:
I have a QMainwindow A and a QWindow B. I want B only moves when A moves, only resize when A resize, only minimize/maximize when A minimize/maximize, etc...

In fact, I want to write a semi-transparent overlay that contains some animation above a QWidget. I have tried many ways to achieve that but all failed. After reading some documents I found that it is because that QWidget is a window container, and the Qt Doc says that

So I wonder whether I can use a semi-transparent QWindow placing above the MainWindow as a workaround?

[jsulm]

@Isolde To me it sounds like you simply need a QWidget placed on your QMainWindow.

[Isolde]

@jsulm said in How to create a QWindow that only behave according to MainWindow?:

@Isolde To me it sounds like you simply need a QWidget placed on your QMainWindow.

It doesn't work. Please read words above red line on the screenshot. A QWidget from QWidget::createWindowContainer() will always on top, so I cannot put any semi-transparent QWidget above that.