antlr/antlr4 — pull request #244 by bkiers (2013-05-01 19:20:42+00:00)
Title: Added JTree to TreeViewer.

Added a JTree representing ANTLR's parse tree of the input. When selecting a certain node, `mult_expr` for example:

![enter image description here][1]

the tree on the right gets updated to that particular tree. When pressing the PNG button, only that tree will be exported to a PNG image.

[1]: http://i.imgur.com/GYOwiEM.png