a container like QStackedWidget in Qt and StackPane in JavaFx

1.what exactly is that you require (including screenshots, documentation, etc.)
https://docs.oracle.com/javase/8/javafx/api/javafx/scene/layout/StackPane.html
https://doc.qt.io/qt-5/qstackedwidget.html

2.what benefits the new control provide and what use cases it will address
several widgets put together, and only one widget is shown at any time.

3.what underlying Windows control/functionality it will map to
a tab control without tab headers

4.the API surface,
maybe "SetCurrentIndex"

5.designer requirements
need to be integarated into ide

6.accessibility requirements
no

Sorry, English is not my mother language, so I could not express well. And I saw What @weltkante reply is really what I want. So if @weltkante could see this post again, please suppliment some more infomation if you could, thanks very much.