This is a mode to manage tree widgets in the buffer. Two libraries use this lib.
Unpack the zip file, and put all .el file to load-path. Put image directory “imenu” to tree-widget folder under data-directory, or put tree-widget/imenu to ~/.emacs.d and add this in .emacs:
(eval-after-load "tree-widget" '(if (boundp 'tree-widget-themes-load-path) (add-to-list 'tree-widget-themes-load-path "~/.emacs.d/")))
Add this to .emacs:
(autoload 'imenu-tree "imenu-tree" "Imenu tree" t) (autoload 'tags-tree "tags-tree" "TAGS tree" t)
Here is screenshot for imenu-tree: