What kinds of GUI libraries does Factor support?
Currently, Factor uses a cross-platform UI library written in Factor itself, using OpenGL and a small amount of native code on each platform. The listener uses this library. There is a Cocoa binding, which is used for the window frame and menu for Mac applications, though it could be used for other things. Similarly, for Unix, there is an X binding, and it has been used in a Factor window manager, Factory. On Windows, there is a binding to some parts of the Windows API through C, but not parts that create widgets. There aren't any bindings to wxWidgets or Gtk yet. Gtk bindings would be doable but somewhat challenging due to their heavy use of macros and complicated structs, and a SWIG binding could be helpful in implementing them. wxWidgets bindings would be impossible right now, as alien does not support C++'s name mangling.
