+;;; Gacela, a GNU Guile extension for fast games development
+;;; Copyright (C) 2009 by Javier Sancho Fernandez <jsf at jsancho dot org>
+;;;
+;;; This program is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation, either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+(define-module (gacela events)
+ #:use-module (gacela sdl)
+ #:export (process-events
+ quit?
+ key?
+ key-pressed?
+ key-released?))
+
+
+(define (get-event events types)
+ (cond ((null? events) '())
+ (else
+ (let ((res (get-event (cdr events) types))
+ (event (car events)))
+ (cond ((member (assoc-ref event 'type) types) (cons event res))
+ (else res))))))
+
+(define (poll-events)
+ (let ((event (SDL_PollEvent)))
+ (cond ((null? event) '())
+ (else (cons event (poll-events))))))
+
+(define (process-events)
+ (let ((events (poll-events)))
+ (quit! (not (null? (get-event events `(,SDL_QUIT)))))
+ (clear-key-state)
+ (process-keyboard-events (get-event events `(,SDL_KEYDOWN ,SDL_KEYUP)))))
+
+(define quit? #f)
+(define quit! #f)
+
+(let ((quit #f))
+ (set! quit?
+ (lambda ()
+ quit))
+
+ (set! quit!
+ (lambda (value)
+ (set! quit value))))
+
+(define (process-keyboard-events events)
+ (cond ((not (null? events))
+ (let ((event (car events)))
+ (cond ((= (assoc-ref event 'type) SDL_KEYDOWN) (key-press (assoc-ref event 'key.keysym.sym)))
+ ((= (assoc-ref event 'type) SDL_KEYUP) (key-release (assoc-ref event 'key.keysym.sym)))))
+ (process-keyboard-events (cdr events)))))
+
+(define key? #f)
+(define key-pressed? #f)
+(define key-released? #f)
+(define key-press #f)
+(define key-release #f)
+(define clear-keymap #f)
+(define clear-key-state #f)
+
+(let ((keymap (make-hash-table))
+ (pressed (make-hash-table))
+ (released (make-hash-table)))
+ (set! key?
+ (lambda (key)
+ (hash-ref keymap (get-keycode key))))
+
+ (set! key-pressed?
+ (lambda (key)
+ (hash-ref pressed (get-keycode key))))
+
+ (set! key-released?
+ (lambda (key)
+ (hash-ref released (get-keycode key))))
+
+ (set! key-press
+ (lambda (key-code)
+ (hash-set! keymap key-code #t)
+ (hash-set! pressed key-code #t)
+ (hash-set! released key-code #f)))
+
+ (set! key-release
+ (lambda (key-code)
+ (hash-set! keymap key-code #f)
+ (hash-set! pressed key-code #f)
+ (hash-set! released key-code #t)))
+
+ (set! clear-keymap
+ (lambda ()
+ (hash-clear! keymap)))
+
+ (set! clear-key-state
+ (lambda ()
+ (hash-clear! pressed)
+ (hash-clear! released))))
+
+(define get-keycode #f)
+(define get-keyname #f)
+
+(let* ((keys
+ '((8 . backspace)
+ (9 . tab)
+ (12 . clear)
+ (13 . return)
+ (19 . pause)
+ (27 . escape)
+ (32 . space)
+ (33 . exclaim)
+ (34 . quotedbl)
+ (35 . hash)
+ (36 . dollar)
+ (38 . ampersand)
+ (39 . quote)
+ (40 . leftparen)
+ (41 . rightparen)
+ (42 . asterisk)
+ (43 . plus)
+ (44 . comma)
+ (45 . minus)
+ (46 . period)
+ (47 . slash)
+ (48 . 0)
+ (49 . 1)
+ (50 . 2)
+ (51 . 3)
+ (52 . 4)
+ (53 . 5)
+ (54 . 6)
+ (55 . 7)
+ (56 . 8)
+ (57 . 9)
+ (58 . colon)
+ (59 . semicolon)
+ (60 . less)
+ (61 . equals)
+ (62 . greater)
+ (63 . question)
+ (64 . at)
+ (269 . kp-minus)
+ (270 . kp-plus)
+ (273 . up)
+ (274 . down)
+ (275 . right)
+ (276 . left)
+ (282 . f1)
+ (283 . f2)
+ (284 . f3)
+ (285 . f4)
+ (286 . f5)
+ (287 . f6)
+ (288 . f7)
+ (289 . f8)
+ (290 . f9)
+ (291 . f10)
+ (292 . f11)
+ (293 . f12)))
+ (keynames (map (lambda (k) (cons (cdr k) (car k))) keys)))
+
+ (set! get-keycode
+ (lambda (keyname)
+ (assoc-ref keynames keyname)))
+
+ (set! get-keyname
+ (lambda (keycode)
+ (assoc-ref keys keycode))))
projects / gacela.git / commitdiff