strange ncurses behaviour

[tux_mind]

hi all,
we have a problem with ncurses.


we use ncurses for handle menu and text.
for draw a nice background we write directly to /dev/fb0.


this is the normal output: https://docs.google.com/file/d/0B0RH...NrQXlSS2s/edit


after a random hits of UP/DOWN buttons, 3 black lines appear under the "Press [h] for help".


this is the corrupted output: https://docs.google.com/file/d/0B0RH...it?usp=sharing


background images are different but the bug should be clear.


here you can find the ncurses menu handler: https://github.com/tux-mind/tf201-de...r/nGUI2.c#L432


thanks for the help.


bye!

[dickey]

we use ncurses for handle menu and text.
for draw a nice background we write directly to /dev/fb0.

ncurses remembers where it thinks the cursor is; if you are writing
to the screen outside of ncurses, you will confuse things and get
the wrong output unless you ensure that the cursor goes back to
where ncurses expects it.