Glyphs are the more recent structured document classes of
ivtools (and
InterViews). They are structured document objects that can do some structured graphics as well. The most complex example program for
glyphs that came with
InterViews 3.1 is a structured document editor, doc. A derivative of doc called
lexi was the source examined in the first
Design Patterns book.
Programming and debugging with them is quite a different thing from programming and debugging with libgraphic or Unidraw. The rendering is procedural and TeX like, and requires a tracing of the layout process to debug. Fresco glyphs are multi-platform glyphs evolved from InterViews glyphs.