Quit game support

[gacela.git] / gacela / event.scm

diff --git a/gacela/event.scm b/gacela/event.scm
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+;;; Gacela, a GNU Guile extension for fast games development
+;;; Copyright (C) 2017 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 event)
+  #:use-module ((sdl2 events) #:prefix sdl2:)
+  #:export (process-events
+           quit?))
+
+
+(define *current-events* '())
+
+(define (poll-events)
+  (let ((event (sdl2:poll-event)))
+    (cond (event
+          (cons event (poll-events)))
+         (else
+          '()))))
+
+(define (process-events)
+  (set! *current-events* (poll-events)))
+
+(define (quit?)
+  (not (null? (filter (lambda (e) (sdl2:quit-event? e)) *current-events*))))