Installing package 'directfb-doc' => 240 pages doc.
"Googling" Where can I find DirectFB tutorials: a few tutorials.
Ncurses : If the documentation isn't in your install, it is in the tarball:
http://ftp.gnu.org/pub/gnu/ncurses/
(ncurses-5.6.tar.gz)(200 pages html)
Tutorials : Lots, just google : ncurses tutorial
Rgds
