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;;; guile-2d
;;; Copyright (C) 2014 David Thompson <dthompson2@worcester.edu>
;;;
;;; Guile-2d is free software: you can redistribute it and/or modify it
;;; under the terms of the GNU Lesser General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; Guile-2d 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
;;; Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; SDL event handlers.
;;
;;; Code:
(define-module (2d event)
#:use-module ((sdl sdl) #:prefix SDL:)
#:export (process-events
register-event-handler))
(define process-events
(let ((e (SDL:make-event)))
(lambda ()
"Process all events in the input event queue."
(while (SDL:poll-event e)
(handle-event e)))))
(define event-handlers (make-hash-table))
(define (register-event-handler event-type proc)
(hashq-set! event-handlers event-type proc))
(define (handle-event e)
"Run the relevant hook for the event E."
(let ((handle (hashq-get-handle event-handlers (SDL:event:type e))))
(when handle
((cdr handle) e))))
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