1 ;;; Gacela, a GNU Guile extension for fast games development
2 ;;; Copyright (C) 2017 by Javier Sancho Fernandez <jsf at jsancho dot org>
4 ;;; This program is free software: you can redistribute it and/or modify
5 ;;; it under the terms of the GNU General Public License as published by
6 ;;; the Free Software Foundation, either version 3 of the License, or
7 ;;; (at your option) any later version.
9 ;;; This program is distributed in the hope that it will be useful,
10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ;;; GNU General Public License for more details.
14 ;;; You should have received a copy of the GNU General Public License
15 ;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
18 (define-module (gacela event)
19 #:use-module ((sdl2 events) #:prefix sdl2:)
20 #:export (process-events
29 (define *current-events* '())
32 (let ((event (sdl2:poll-event)))
34 (cons event (poll-events)))
38 (define (process-events)
39 (set! *current-events* (poll-events)))
42 (not (null? (filter (lambda (e) (sdl2:quit-event? e)) *current-events*))))
45 (filter (lambda (e) (sdl2:keyboard-event? e)) *current-events*))
47 (define (any-key-down?)
48 (let loop ((events *current-events*))
51 (or (sdl2:keyboard-down-event? (car events))
52 (loop (cdr events))))))
55 (let loop ((events *current-events*))
58 (or (sdl2:keyboard-up-event? (car events))
59 (loop (cdr events))))))
61 (define (key-down? key)
64 (and (sdl2:keyboard-down-event? e)
65 (equal? (sdl2:keyboard-event-key e) key)))
72 (and (sdl2:keyboard-up-event? e)
73 (equal? (sdl2:keyboard-event-key e) key)))