Added ESC key handling

1 files changed, 29 insertions, 15 deletions

diff --git a/progs/redbook/stroke.c b/progs/redbook/stroke.c
index d8c75c89fe..19b0391cba 100644
--- a/progs/redbook/stroke.c
+++ b/progs/redbook/stroke.c
@@ -3,14 +3,14 @@
 
 /*
  * (c) Copyright 1993, 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,
@@ -24,8 +24,8 @@
  * 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
@@ -38,10 +38,10 @@
  * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
  */
 /*
- *  stroke.c 
- *  This program demonstrates some characters of a 
+ *  stroke.c
+ *  This program demonstrates some characters of a
  *  stroke (vector) font.  The characters are represented
- *  by display lists, which are given numbers which 
+ *  by display lists, which are given numbers which
  *  correspond to the ASCII values of the characters.
  *  Use of glCallLists() is demonstrated.
  */
@@ -59,7 +59,7 @@ typedef struct charpoint {
 } CP;
 
 CP Adata[] = {
-    { 0, 0, PT}, {0, 9, PT}, {1, 10, PT}, {4, 10, PT}, 
+    { 0, 0, PT}, {0, 9, PT}, {1, 10, PT}, {4, 10, PT},
     {5, 9, PT}, {5, 0, STROKE}, {0, 5, PT}, {5, 5, END}
 };
 
@@ -69,18 +69,18 @@ CP Edata[] = {
 };
 
 CP Pdata[] = {
-    {0, 0, PT}, {0, 10, PT},  {4, 10, PT}, {5, 9, PT}, {5, 6, PT}, 
+    {0, 0, PT}, {0, 10, PT},  {4, 10, PT}, {5, 9, PT}, {5, 6, PT},
     {4, 5, PT}, {0, 5, END}
 };
 
 CP Rdata[] = {
-    {0, 0, PT}, {0, 10, PT},  {4, 10, PT}, {5, 9, PT}, {5, 6, PT}, 
+    {0, 0, PT}, {0, 10, PT},  {4, 10, PT}, {5, 9, PT}, {5, 6, PT},
     {4, 5, PT}, {0, 5, STROKE}, {3, 5, PT}, {5, 0, END}
 };
 
 CP Sdata[] = {
-    {0, 1, PT}, {1, 0, PT}, {4, 0, PT}, {5, 1, PT}, {5, 4, PT}, 
-    {4, 5, PT}, {1, 5, PT}, {0, 6, PT}, {0, 9, PT}, {1, 10, PT}, 
+    {0, 1, PT}, {1, 0, PT}, {4, 0, PT}, {5, 1, PT}, {5, 4, PT},
+    {4, 5, PT}, {1, 5, PT}, {0, 6, PT}, {0, 9, PT}, {1, 10, PT},
     {4, 10, PT}, {5, 9, END}
 };
 
@@ -163,8 +163,21 @@ static void reshape(GLsizei w, GLsizei h)
     glLoadIdentity();
 }
 
+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)
@@ -176,6 +189,7 @@ int main(int argc, char** argv)
     myinit ();
     glutDisplayFunc(display);
     glutReshapeFunc(reshape);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }