On Sat, 20 Nov 2004, Lars Ivar Igesund wrote:

I'm trying to write a curses-like library for D (it started out as a port of PDCurses, but I wanted to use the OO-features of D, so it turned out to be a rewrite), and I'm using PDCurses as a help to understand what's needed, especially at the OS-level.

In the function getInterestingEvent in win32/pdckbd.c, several decimal values are compared with the virtual key code of the event. The result is then used as a throw away criteria, etc. What I have difficulties grokking is the meaning of these values (20, 144, 145, 16, 17, 18). It is presumably control characters of some sort, but I don't really know.

Sorry for late reply... You have probably already figured this out? I haven't read the source code of pdcurses, but I think these values might be the PC codes for function keys, arrow keys and similar non-ASCII keys. IIRC, when such a key is typed, BIOS will provide a two-byte escape sequence representing the key, consisting of 0 (zero) and the key value (20, 144 etc.). This convention is probably still followed for programs run inside a console in Windows.

http://www.google.com/[EMAIL PROTECTED]

David Kaasen.

Reply via email to