Move SDL event handling to a separate module.

* 2d/event.scm: New module.

* 2d/game.scm: Remove event handling code.

* 2d/keyboard.scm: Import (2d event) instead of (2d game).

* 2d/mouse.scm: Import (2d event) instead of (2d game).

* 2d/window.scm: Import (2d event) instead of (2d game).

1 files changed, 45 insertions, 0 deletions

diff --git a/2d/event.scm b/2d/event.scm
new file mode 100644
index 0000000..1dcaea5
--- /dev/null
+++ b/2d/event.scm
@@ -0,0 +1,45 @@
+;;; 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))))