https://forum.qt.io/topic/34195/moving-qdockwindow-to-another-qmainwindow-during-drag
Moving QDockWindow to another QMainWindow during drag. | Qt Forum
Nov 18, 2013 - Hello all, The title says it all : I want to change QMainWindow of a QDockWindow while I'm dragging the said QDockWindow. While I'm not dragging I can do thi...
movinganotherqmainwindowdragqt