Todo

Todo Now

Make a GUI. One approach is to render individual icons with diagrams using the Cairo or GTK backend. The rendering would be in a separate process so that interacting and dragging nodes is not slowed down by rendering.
Redesign case icon to avoid non-locality.
Move @ pattern circles so that they are on the same side as the variables.
Add command line flags for color style, embedding, and whether to draw arrowheads.
Add wiki pages discussing: Why a visual language?, History of Glance, How to contribute, Code guide [code style, ...], etc..

Use different line styles (e.g. dashed, solid, wavy) in addition to colors
Consider improving nested apply icons embedded in case/guard icons.
Let lines connect to ports other than the original source
Use diagrams to shrink the drawing until icons start overlapping.
Make an icon font/library with labeled ports. E.g. the apply icon would have text labels "function", "result", "arg 0", "arg 1", etc.

Fix applyComposeScore in Translate.hs not counting expressions that nest via reference. May need to move compose generation to after translate.
Add proper RecConstr, and RecUpdate support.
Special case for otherwise.