Added ESC key handling

1 files changed, 24 insertions, 10 deletions

diff --git a/progs/redbook/polyoff.c b/progs/redbook/polyoff.c
index 42887c9e0c8..280eb165ecb 100644
--- a/progs/redbook/polyoff.c
+++ b/progs/redbook/polyoff.c
@@ -1,13 +1,13 @@
 /*
  * Copyright (c) 1993-1997, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED 
- * Permission to use, copy, modify, and distribute this software for 
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
  * any purpose and without fee is hereby granted, provided that the above
  * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that 
+ * and this permission notice appear in supporting documentation, and that
  * the name of Silicon Graphics, Inc. not be used in advertising
  * or publicity pertaining to distribution of the software without specific,
- * written prior permission. 
+ * written prior permission.
  *
  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
  * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
@@ -21,8 +21,8 @@
  * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
  * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
  * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- * 
- * US Government Users Restricted Rights 
+ *
+ * US Government Users Restricted Rights
  * Use, duplication, or disclosure by the Government is subject to
  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
@@ -89,7 +89,7 @@ void display (void)
 }
 
 /*  specify initial properties
- *  create display list with sphere  
+ *  create display list with sphere
  *  initialize lighting and depth buffer
  */
 void gfxinit (void)
@@ -137,7 +137,7 @@ void mouse(int button, int state, int x, int y) {
 	case GLUT_LEFT_BUTTON:
 	    switch (state) {
 		case GLUT_DOWN:
-		    spinx = (spinx + 5) % 360; 
+		    spinx = (spinx + 5) % 360;
                     glutPostRedisplay();
 		    break;
 		default:
@@ -147,7 +147,7 @@ void mouse(int button, int state, int x, int y) {
 	case GLUT_MIDDLE_BUTTON:
 	    switch (state) {
 		case GLUT_DOWN:
-		    spiny = (spiny + 5) % 360; 
+		    spiny = (spiny + 5) % 360;
                     glutPostRedisplay();
 		    break;
 		default:
@@ -209,8 +209,21 @@ void keyboard (unsigned char key, int x, int y)
    }
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
- *  Open window with initial window size, title bar, 
+ *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
  */
 int main(int argc, char** argv)
@@ -223,6 +236,7 @@ int main(int argc, char** argv)
     glutMouseFunc(mouse);
     glutKeyboardFunc(keyboard);
     gfxinit();
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;
 }