IIRC they were called tear-off menus in X / Motif days.
I had attended a company course on X Windows, Xlib, and Motif programming, back in the day.
Motif might have been clunky or whatever, but was also powerful. That course was my first introduction to event-driven GUI programming and I was quite junior then, and didn't quite grok all the programming concepts involved, but a colleague, who was more knowledgeable, created a rudimentary MS Paint-like application, in about 1 hour or less, using Motif and C.
(Okay, he worked in the same company as me, but in a different city, so might have had the hardware and software resources to practice on X and Motif before the course, which I did not have.)
I had attended a company course on X Windows, Xlib, and Motif programming, back in the day.
Motif might have been clunky or whatever, but was also powerful. That course was my first introduction to event-driven GUI programming and I was quite junior then, and didn't quite grok all the programming concepts involved, but a colleague, who was more knowledgeable, created a rudimentary MS Paint-like application, in about 1 hour or less, using Motif and C.
(Okay, he worked in the same company as me, but in a different city, so might have had the hardware and software resources to practice on X and Motif before the course, which I did not have.)
Search for 16.3.7 at:
https://www.oreilly.com/library/view/volume-6a-motif/9780596...
or search for tear-off menu at:
https://www.oreilly.com/openbook/motif/vol6a/Vol6a_html/ch15...