From: Javier Sancho <jsf@jsancho.org>
Date: Thu, 19 Jan 2017 19:19:29 +0000 (+0100)
Subject: Quit game support
X-Git-Url: https://git.jsancho.org/?p=gacela.git;a=commitdiff_plain;h=475d22be2375535402165d3373fae03a028886f2

Quit game support
---

diff --git a/examples/02-event-driven-programming/02-event-driven-programming.scm b/examples/02-event-driven-programming/02-event-driven-programming.scm
new file mode 100644
index 0000000..903a6a5
--- /dev/null
+++ b/examples/02-event-driven-programming/02-event-driven-programming.scm
@@ -0,0 +1,22 @@
+#!/usr/bin/env guile
+!#
+
+;;; 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/>.
+
+(use-modules (gacela))
+
+(run-scene (import-bitmap "x.bmp"))
diff --git a/examples/02-event-driven-programming/x.bmp b/examples/02-event-driven-programming/x.bmp
new file mode 100755
index 0000000..9633a7e
Binary files /dev/null and b/examples/02-event-driven-programming/x.bmp differ
diff --git a/gacela/event.scm b/gacela/event.scm
new file mode 100644
index 0000000..9efd8e1
--- /dev/null
+++ b/gacela/event.scm
@@ -0,0 +1,37 @@
+;;; 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*))))
diff --git a/gacela/game.scm b/gacela/game.scm
index dad0412..dd7886c 100644
--- a/gacela/game.scm
+++ b/gacela/game.scm
@@ -17,6 +17,7 @@
 
 (define-module (gacela game)
   #:use-module (gacela math)
+  #:use-module (gacela event)
   #:use-module ((sdl2) #:prefix sdl2:)
   #:use-module ((sdl2 render) #:prefix sdl2:)
   #:use-module ((sdl2 surface) #:prefix sdl2:)
@@ -72,7 +73,7 @@ unused accumulator time."
 	(cond ((>= ticks max-ticks-per-frame)
 	       lag)
 	      ((>= lag tick-interval)
-					;(process-events)
+	       (process-events)
 					;(agenda-tick!)
 	       (iter (- lag tick-interval) (1+ ticks)))
 	      (else