key_shifts

Langue: en

Version: version 4.2.2 (fedora - 05/07/09)

Section: 3 (Bibliothèques de fonctions)

Sommaire

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(3), poll_keyboard(3), key(3), excamera(3), exkeys(3)