algo/al/keyboard.go

package al

/*
#include <stdlib.h>
#include <allegro5/allegro.h>
#include "helpers.h"
*/
import "C"

// Usful regexp for KATE:  ALLEGRO_([A-Z0-9_]+)(.*) -> \1 = C.ALLEGRO_\1

// Keyboard functionality.

// Checks if the Allegro keyboard module is installed or not.
func IsKeyboardInstalled() bool {
    return bool(C.al_is_keyboard_installed())
}

// Installs the Allegro keyboard module.
func InstallKeyboard() bool {
    return bool(C.al_install_keyboard())
}

// Uninstalls the Allegro keyboard module.
func UninstallKeyboard() {
    C.al_uninstall_keyboard()
}

// Gets the name of te given keucode as a string.
func KeycodeToName(keycode int) string {
    return gostr(C.al_keycode_to_name(C.int(keycode)))
}

// KeyboardState isn't very interesting for now, so don't wrap it
// and let KeyDown work as a global function

// Gets the state of a given keyboard key by keycode. True is down, false is up.
func KeyDown(keycode int) bool {
    state := &C.ALLEGRO_KEYBOARD_STATE{}
    C.al_get_keyboard_state(state)
    return bool(C.al_key_down(state, C.int(keycode)))
}

// Sets the state of the leds on the keyboard.
func SetKeyboardLeds(leds int) bool {
    return bool(C.al_set_keyboard_leds(C.int(leds)))
}

// Returns the Keyboard event source that can be registered to an EventQueue
// with RegisterEventSource.
func GetKeyboardEventSource() *EventSource {
    return (*EventSource)(C.al_get_keyboard_event_source())
}

// Keyboard constants
const (
    KEY_A = C.ALLEGRO_KEY_A
    KEY_B = C.ALLEGRO_KEY_B
    KEY_C = C.ALLEGRO_KEY_C
    KEY_D = C.ALLEGRO_KEY_D
    KEY_E = C.ALLEGRO_KEY_E
    KEY_F = C.ALLEGRO_KEY_F
    KEY_G = C.ALLEGRO_KEY_G
    KEY_H = C.ALLEGRO_KEY_H
    KEY_I = C.ALLEGRO_KEY_I
    KEY_J = C.ALLEGRO_KEY_J
    KEY_K = C.ALLEGRO_KEY_K
    KEY_L = C.ALLEGRO_KEY_L
    KEY_M = C.ALLEGRO_KEY_M
    KEY_N = C.ALLEGRO_KEY_N
    KEY_O = C.ALLEGRO_KEY_O
    KEY_P = C.ALLEGRO_KEY_P
    KEY_Q = C.ALLEGRO_KEY_Q
    KEY_R = C.ALLEGRO_KEY_R
    KEY_S = C.ALLEGRO_KEY_S
    KEY_T = C.ALLEGRO_KEY_T
    KEY_U = C.ALLEGRO_KEY_U
    KEY_V = C.ALLEGRO_KEY_V
    KEY_W = C.ALLEGRO_KEY_W
    KEY_X = C.ALLEGRO_KEY_X
    KEY_Y = C.ALLEGRO_KEY_Y
    KEY_Z = C.ALLEGRO_KEY_Z

    KEY_0 = C.ALLEGRO_KEY_0
    KEY_1 = C.ALLEGRO_KEY_1
    KEY_2 = C.ALLEGRO_KEY_2
    KEY_3 = C.ALLEGRO_KEY_3
    KEY_4 = C.ALLEGRO_KEY_4
    KEY_5 = C.ALLEGRO_KEY_5
    KEY_6 = C.ALLEGRO_KEY_6
    KEY_7 = C.ALLEGRO_KEY_7
    KEY_8 = C.ALLEGRO_KEY_8
    KEY_9 = C.ALLEGRO_KEY_9

    KEY_PAD_0 = C.ALLEGRO_KEY_PAD_0
    KEY_PAD_1 = C.ALLEGRO_KEY_PAD_1
    KEY_PAD_2 = C.ALLEGRO_KEY_PAD_2
    KEY_PAD_3 = C.ALLEGRO_KEY_PAD_3
    KEY_PAD_4 = C.ALLEGRO_KEY_PAD_4
    KEY_PAD_5 = C.ALLEGRO_KEY_PAD_5
    KEY_PAD_6 = C.ALLEGRO_KEY_PAD_6
    KEY_PAD_7 = C.ALLEGRO_KEY_PAD_7
    KEY_PAD_8 = C.ALLEGRO_KEY_PAD_8
    KEY_PAD_9 = C.ALLEGRO_KEY_PAD_9

    KEY_F1  = C.ALLEGRO_KEY_F1
    KEY_F2  = C.ALLEGRO_KEY_F2
    KEY_F3  = C.ALLEGRO_KEY_F3
    KEY_F4  = C.ALLEGRO_KEY_F4
    KEY_F5  = C.ALLEGRO_KEY_F5
    KEY_F6  = C.ALLEGRO_KEY_F6
    KEY_F7  = C.ALLEGRO_KEY_F7
    KEY_F8  = C.ALLEGRO_KEY_F8
    KEY_F9  = C.ALLEGRO_KEY_F9
    KEY_F10 = C.ALLEGRO_KEY_F10
    KEY_F11 = C.ALLEGRO_KEY_F11
    KEY_F12 = C.ALLEGRO_KEY_F12

    KEY_ESCAPE     = C.ALLEGRO_KEY_ESCAPE
    KEY_TILDE      = C.ALLEGRO_KEY_TILDE
    KEY_MINUS      = C.ALLEGRO_KEY_MINUS
    KEY_EQUALS     = C.ALLEGRO_KEY_EQUALS
    KEY_BACKSPACE  = C.ALLEGRO_KEY_BACKSPACE
    KEY_TAB        = C.ALLEGRO_KEY_TAB
    KEY_OPENBRACE  = C.ALLEGRO_KEY_OPENBRACE
    KEY_CLOSEBRACE = C.ALLEGRO_KEY_CLOSEBRACE
    KEY_ENTER      = C.ALLEGRO_KEY_ENTER
    KEY_SEMICOLON  = C.ALLEGRO_KEY_SEMICOLON
    KEY_QUOTE      = C.ALLEGRO_KEY_QUOTE
    KEY_BACKSLASH  = C.ALLEGRO_KEY_BACKSLASH
    KEY_BACKSLASH2 = C.ALLEGRO_KEY_BACKSLASH2
    KEY_COMMA      = C.ALLEGRO_KEY_COMMA
    KEY_FULLSTOP   = C.ALLEGRO_KEY_FULLSTOP
    KEY_SLASH      = C.ALLEGRO_KEY_SLASH
    KEY_SPACE      = C.ALLEGRO_KEY_SPACE

    KEY_INSERT = C.ALLEGRO_KEY_INSERT
    KEY_DELETE = C.ALLEGRO_KEY_DELETE
    KEY_HOME   = C.ALLEGRO_KEY_HOME
    KEY_END    = C.ALLEGRO_KEY_END
    KEY_PGUP   = C.ALLEGRO_KEY_PGUP
    KEY_PGDN   = C.ALLEGRO_KEY_PGDN
    KEY_LEFT   = C.ALLEGRO_KEY_LEFT
    KEY_RIGHT  = C.ALLEGRO_KEY_RIGHT
    KEY_UP     = C.ALLEGRO_KEY_UP
    KEY_DOWN   = C.ALLEGRO_KEY_DOWN

    KEY_PAD_SLASH    = C.ALLEGRO_KEY_PAD_SLASH
    KEY_PAD_ASTERISK = C.ALLEGRO_KEY_PAD_ASTERISK
    KEY_PAD_MINUS    = C.ALLEGRO_KEY_PAD_MINUS
    KEY_PAD_PLUS     = C.ALLEGRO_KEY_PAD_PLUS
    KEY_PAD_DELETE   = C.ALLEGRO_KEY_PAD_DELETE
    KEY_PAD_ENTER    = C.ALLEGRO_KEY_PAD_ENTER

    KEY_PRINTSCREEN = C.ALLEGRO_KEY_PRINTSCREEN
    KEY_PAUSE       = C.ALLEGRO_KEY_PAUSE

    KEY_ABNT_C1    = C.ALLEGRO_KEY_ABNT_C1
    KEY_YEN        = C.ALLEGRO_KEY_YEN
    KEY_KANA       = C.ALLEGRO_KEY_KANA
    KEY_CONVERT    = C.ALLEGRO_KEY_CONVERT
    KEY_NOCONVERT  = C.ALLEGRO_KEY_NOCONVERT
    KEY_AT         = C.ALLEGRO_KEY_AT
    KEY_CIRCUMFLEX = C.ALLEGRO_KEY_CIRCUMFLEX
    KEY_COLON2     = C.ALLEGRO_KEY_COLON2
    KEY_KANJI      = C.ALLEGRO_KEY_KANJI

    KEY_PAD_EQUALS = C.ALLEGRO_KEY_PAD_EQUALS
    KEY_BACKQUOTE  = C.ALLEGRO_KEY_BACKQUOTE
    KEY_SEMICOLON2 = C.ALLEGRO_KEY_SEMICOLON2
    KEY_COMMAND    = C.ALLEGRO_KEY_COMMAND
    KEY_UNKNOWN    = C.ALLEGRO_KEY_UNKNOWN

    /* All codes up to before KEY_MODIFIERS = C.ALLEGRO_KEY_MODIFIERS
     * assignedas additional unknown keys, like various multimedia
     * and application keys keyboards may have.
     */

    KEY_MODIFIERS = C.ALLEGRO_KEY_MODIFIERS

    KEY_LSHIFT     = C.ALLEGRO_KEY_LSHIFT
    KEY_RSHIFT     = C.ALLEGRO_KEY_RSHIFT
    KEY_LCTRL      = C.ALLEGRO_KEY_LCTRL
    KEY_RCTRL      = C.ALLEGRO_KEY_RCTRL
    KEY_ALT        = C.ALLEGRO_KEY_ALT
    KEY_ALTGR      = C.ALLEGRO_KEY_ALTGR
    KEY_LWIN       = C.ALLEGRO_KEY_LWIN
    KEY_RWIN       = C.ALLEGRO_KEY_RWIN
    KEY_MENU       = C.ALLEGRO_KEY_MENU
    KEY_SCROLLLOCK = C.ALLEGRO_KEY_SCROLLLOCK
    KEY_NUMLOCK    = C.ALLEGRO_KEY_NUMLOCK
    KEY_CAPSLOCK   = C.ALLEGRO_KEY_CAPSLOCK

    KEY_MAX = C.ALLEGRO_KEY_MAX
)

// Keyboard modifier constants
const (
    KEYMOD_SHIFT      = C.ALLEGRO_KEYMOD_SHIFT
    KEYMOD_CTRL       = C.ALLEGRO_KEYMOD_CTRL
    KEYMOD_ALT        = C.ALLEGRO_KEYMOD_ALT
    KEYMOD_LWIN       = C.ALLEGRO_KEYMOD_LWIN
    KEYMOD_RWIN       = C.ALLEGRO_KEYMOD_RWIN
    KEYMOD_MENU       = C.ALLEGRO_KEYMOD_MENU
    KEYMOD_ALTGR      = C.ALLEGRO_KEYMOD_ALTGR
    KEYMOD_COMMAND    = C.ALLEGRO_KEYMOD_COMMAND
    KEYMOD_SCROLLLOCK = C.ALLEGRO_KEYMOD_SCROLLLOCK
    KEYMOD_NUMLOCK    = C.ALLEGRO_KEYMOD_NUMLOCK
    KEYMOD_CAPSLOCK   = C.ALLEGRO_KEYMOD_CAPSLOCK
    KEYMOD_INALTSEQ   = C.ALLEGRO_KEYMOD_INALTSEQ
    KEYMOD_ACCENT1    = C.ALLEGRO_KEYMOD_ACCENT1
    KEYMOD_ACCENT2    = C.ALLEGRO_KEYMOD_ACCENT2
    KEYMOD_ACCENT3    = C.ALLEGRO_KEYMOD_ACCENT3
    KEYMOD_ACCENT4    = C.ALLEGRO_KEYMOD_ACCENT4
)

type Keyboard struct {
    handle * C.ALLEGRO_KEYBOARD
}

func wrapKeyboardRaw(kb * C.ALLEGRO_KEYBOARD) * Keyboard {
    res := &Keyboard{kb}
    return res
}


type KeyboardState C.ALLEGRO_KEYBOARD_STATE

func (ks * KeyboardState) toC() * C.ALLEGRO_KEYBOARD_STATE {
    return (*C.ALLEGRO_KEYBOARD_STATE)(ks)
}


func GetKeyboardState() * KeyboardState {
    ks := &KeyboardState{}
    C.al_get_keyboard_state(ks.toC());
    return ks
}

func (ks * KeyboardState) KeyDown(keycode int) bool {
    return bool(C.al_key_down(ks.toC(), C.int(keycode)))
}