Curses getting arrow keys

问题:

In trying to get input from the arrow keys via curses (ncurses) it won't catch as KEY_UP etc. I used the keypad function with a true argument but getch still returns an escaped sequence. How do I sift through the values returned by getch() and grab the arrow keys specifically?

回答1:

I was storing getch() calls as char's when they were supposed to be int's. Works perfectly after the switch.

回答2:

I found the same problem on Mac OS X. But it was resolved by adding the following:

keypad(stdscr, TRUE);

回答3:

Standard (VT100-like) terminals send a sequence of characters when the arrow keys are pressed. You just have to keep track of whether or not these are pressed in sequence. Here are the char's to watch for:

Down Arrow  0x1B 0x5B 0x42
Left Arrow  0x1B 0x5B 0x44
Right Arrow 0x1B 0x5B 0x43
Up Arrow    0x1B 0x5B 0x41