key_shifts man page

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)

Referenced By

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

version 4.4.2 Allegro Allegro manual