Graphical program from terminal doesn't create a new window

Notice that in 9front the graphical program "takes over" the current window instead of opening a new one.

https://www.youtube.com/watch?v=4a02IUvg-js

Is there a way to do this on standard Linux?

>>14
It's amazing how useful this swallow patch is.
I wonder if suckless would accept it upstream if we made it an option on config.h. I guess not because of the extra dependencies on some XCB libs. What do you think?