[Qt-interest] How can I change a widget's ownership (parent)?

[Kermit Mei]

hello, community!
How can I change a widget's ownership? For example, I create a
pushbutton like this QPushButton(&widget_1), now I want to make its
parent as widget_2, and it can be shown on widget_2 as a child, how can
I implement it? 

Thanks
Kermit