MagicUserInterface (MUI) is still the primary toolkit on MorphOS, in addition to being the go-to toolkit for many newer Amiga programs as well.
When it was released in 1993, it was very modern. Object-oriented, scalable layout, simple to program, themeable and very customiseable. I wouldn't be surprised if the developers of Qt, Gtk and SwiftUI would reveal that they would have taken inspiration from it.
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Magic User Interface (MUI) is still the primary toolkit on MorphOS, in addition to being the go-to toolkit for many newer Amiga programs as well.
When it was released in 1993, it was very modern. Object-oriented, scalable layout, simple to program, themeable and very customiseable. I wouldn't be surprised if the developers of Qt, Gtk and SwiftUI would reveal that they would have taken inspiration from it.
https://en.wikipedia.org/wiki/Magic_User_Interface
http://www.sasg.com/mui/
gtk+/gnome folks were apparently at least vaguely aware of Amiga MUI e.g. discussing it in a context of implementing theming/styling in Feb 1998 -
https://lists.gnome.org/archives/gnome-themes-list/1998-Febr...