key_shifts(3alleg4) Allegro manual key_shifts(3alleg4)
NAME
key_shifts - Bitmask containing the current state of modifier keys. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
extern volatile int key_shifts;
DESCRIPTION
Bitmask containing the current state of shift/ctrl/alt, the special Windows keys, and the accent escape characters. Wherever possible this
value will be updated asynchronously, but if keyboard_needs_poll() returns TRUE, you must manually call poll_keyboard() to update it with
the current input state. This can contain any of the flags:
KB_SHIFT_FLAG
KB_CTRL_FLAG
KB_ALT_FLAG
KB_LWIN_FLAG
KB_RWIN_FLAG
KB_MENU_FLAG
KB_COMMAND_FLAG
KB_SCROLOCK_FLAG
KB_NUMLOCK_FLAG
KB_CAPSLOCK_FLAG
KB_INALTSEQ_FLAG
KB_ACCENT1_FLAG
KB_ACCENT2_FLAG
KB_ACCENT3_FLAG
KB_ACCENT4_FLAG
Example:
if (key[KEY_W]) {
if (key_shifts & KB_SHIFT_FLAG) {
/* User is pressing shift + W. */
} else {
/* Hmmm... lower case W then. */
}
}
SEE ALSO
install_keyboard(3alleg4), poll_keyboard(3alleg4), key(3alleg4), excamera(3alleg4), exkeys(3alleg4)
Allegro version 4.4.2 key_shifts(3alleg4)
