New demo from John: CallbackMaker.

This demo shows the use of every callback that you can register with
freeglut, and also generates event reports so that you can see what is
happening to the program as it runs.

Not much to look at, but both utilitarian and a practical example.

Please double-check that I updated everything that needs to be updated.
I reran autogen.sh and ./configure, and it built okay for me.  (^&


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@332 7f0cb862-5218-0410-a997-914c9d46530a

.gitattributes

@@ -34,6 +34,8 @@ freeglut/freeglut/include/Makefile.am svn_keywords=Author+Date+Id+Revision
 freeglut/freeglut/install-sh svn_keywords=Author+Date+Id+Revision
 freeglut/freeglut/mkinstalldirs svn_keywords=Author+Date+Id+Revision
 freeglut/freeglut/progs/Makefile.am svn_keywords=Author+Date+Id+Revision
+freeglut/freeglut/progs/demos/CallbackMaker/CallbackMaker.c svn_keywords=Author+Date+Id+Revision
+freeglut/freeglut/progs/demos/CallbackMaker/Makefile.am svn_keywords=Author+Date+Id+Revision
 freeglut/freeglut/progs/demos/Fractals/Fractals.dsp svn_keywords=Author+Date+Id+Revision
 freeglut/freeglut/progs/demos/Fractals/Makefile.am svn_keywords=Author+Date+Id+Revision
 freeglut/freeglut/progs/demos/Fractals/fractals.c svn_keywords=Author+Date+Id+Revision

freeglut/freeglut/configure.in

@@ -55,6 +55,7 @@ AC_OUTPUT(\
 	doc/Makefile \
 	progs/Makefile \
 	progs/demos/Makefile \
+	progs/demos/CallbackMaker/Makefile \
 	progs/demos/Fractals/Makefile \
 	progs/demos/Fractals_random/Makefile \
 	progs/demos/Lorenz/Makefile \

freeglut/freeglut/progs/demos/CallbackMaker/CallbackMaker.c

@@ -0,0 +1,185 @@
+/* CallbackMaker.c */
+/*
+ * Program to invoke all the callbacks that "freeglut" supports
+ */
+
+
+#include <GL/freeglut.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static int sequence_number = 0 ;
+
+static void 
+Display(void)
+{
+  int window = glutGetWindow () ;
+  glClear( GL_COLOR_BUFFER_BIT );
+
+  printf ( "%6d Window %d Display Callback\n",
+            ++sequence_number, window ) ;
+  glutSwapBuffers();
+}
+
+static void 
+Reshape(int width, int height)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Reshape Callback:  %d %d\n",
+            ++sequence_number, window, width, height ) ;
+}
+
+static void 
+Key(unsigned char key, int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Keyboard Callback:  %d %d %d\n",
+            ++sequence_number, window, key, x, y ) ;
+}
+
+static void 
+Special(int key, int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Special Key Callback:  %d %d %d\n",
+            ++sequence_number, window, key, x, y ) ;
+}
+
+static void 
+Visibility(int vis)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Visibility Callback:  %d\n",
+            ++sequence_number, window, vis ) ;
+}
+
+static void 
+KeyUp(unsigned char key, int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Key Release Callback:  %d %d %d\n",
+            ++sequence_number, window, key, x, y ) ;
+}
+
+static void 
+SpecialUp(int key, int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Special Key Release Callback:  %d %d %d\n",
+            ++sequence_number, window, key, x, y ) ;
+}
+
+static void 
+Joystick( unsigned int a, int b, int c, int d)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Joystick Callback:  %d %d %d %d\n",
+            ++sequence_number, window, a, b, c, d ) ;
+}
+
+static void 
+Mouse(int button, int updown, int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Mouse Click Callback:  %d %d %d %d\n",
+            ++sequence_number, window, button, updown, x, y ) ;
+}
+
+static void 
+MouseWheel(int wheel_number, int direction, int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Mouse Wheel Callback:  %d %d %d %d\n",
+            ++sequence_number, window, wheel_number, direction, x, y ) ;
+}
+
+static void 
+Motion(int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Mouse Motion Callback:  %d %d\n",
+            ++sequence_number, window, x, y ) ;
+}
+
+static void 
+PassiveMotion(int x, int y)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Mouse Passive Motion Callback:  %d %d\n",
+            ++sequence_number, window, x, y ) ;
+}
+
+static void 
+Entry(int state)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Entry Callback:  %d\n",
+            ++sequence_number, window, state ) ;
+}
+
+static void 
+Close(void)
+{
+  int window = glutGetWindow () ;
+  printf ( "%6d Window %d Close Callback\n",
+            ++sequence_number, window ) ;
+}
+
+
+
+int 
+main(int argc, char *argv[])
+{
+  int freeglut_window, aux_window ;
+
+  glutInitWindowSize(500, 250);
+  glutInitWindowPosition ( 140, 140 );
+  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE );
+  glutInit(&argc, argv);
+
+  freeglut_window = glutCreateWindow( "Callback Demo" );
+  printf ( "Creating window %d as 'Callback Demo'\n", freeglut_window ) ;
+
+  glClearColor(1.0, 1.0, 1.0, 1.0);
+
+  glutDisplayFunc( Display );
+  glutReshapeFunc( Reshape );
+  glutKeyboardFunc( Key );
+  glutSpecialFunc( Special );
+  glutVisibilityFunc( Visibility );
+  glutKeyboardUpFunc( KeyUp );
+  glutSpecialUpFunc( SpecialUp );
+//  glutJoystickFunc( Joystick, 10 );
+  glutMouseFunc ( Mouse ) ;
+  glutMouseWheelFunc ( MouseWheel ) ;
+  glutMotionFunc ( Motion ) ;
+  glutPassiveMotionFunc ( PassiveMotion ) ;
+  glutEntryFunc ( Entry ) ;
+  glutCloseFunc ( Close ) ;
+
+  aux_window = glutCreateWindow( "Second Window" );
+  printf ( "Creating window %d as 'Second Window'\n", aux_window ) ;
+
+  glClearColor(1.0, 1.0, 1.0, 1.0);
+
+  glutDisplayFunc( Display );
+  glutReshapeFunc( Reshape );
+  glutKeyboardFunc( Key );
+  glutSpecialFunc( Special );
+  glutVisibilityFunc( Visibility );
+  glutKeyboardUpFunc( KeyUp );
+  glutSpecialUpFunc( SpecialUp );
+//  glutJoystickFunc( Joystick, 10 );
+  glutMouseFunc ( Mouse ) ;
+  glutMouseWheelFunc ( MouseWheel ) ;
+  glutMotionFunc ( Motion ) ;
+  glutPassiveMotionFunc ( PassiveMotion ) ;
+  glutEntryFunc ( Entry ) ;
+  glutCloseFunc ( Close ) ;
+
+  glutMainLoop();
+
+  printf ( "Back from the 'freeglut' main loop\n" ) ;
+
+  return 0;             /* ANSI C requires main to return int. */
+}

freeglut/freeglut/progs/demos/CallbackMaker/Makefile.am

@@ -0,0 +1,5 @@
+EXTRA_DIST = CallbackMaker.c
+noinst_PROGRAMS = CallbackMaker
+CallbackMaker_SOURCES = CallbackMaker.c
+CallbackMaker_LDFLAGS = -export-dynamic ../../../src/lib@LIBRARY@.la
+CallbackMaker_CFLAGS = -I$(top_srcdir)/include $(X_CFLAGS)

freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c

@@ -63,12 +63,9 @@ static void draw_level ( int num, double m00, double m01, double m10, double m11
 
   for ( i = 0; i < 10; i++ )
   {
-    int random = rand( );
+    int random = ( rand( ) >> 10 ) % num_trans;
-    double new_x;
+    double new_x = affine[random].a00 * current_x + affine[random].a01 * current_y + affine[random].b0 ;
-    double new_y;
+    double new_y = affine[random].a10 * current_x + affine[random].a11 * current_y + affine[random].b1 ;
-    random = (((random >> 10)) & 2) + (((random >> 20) ) & 1);
-    new_x = affine[random].a00 * current_x + affine[random].a01 * current_y + affine[random].b0 ;
-    new_y = affine[random].a10 * current_x + affine[random].a11 * current_y + affine[random].b1 ;
     
     glVertex2d ( new_x, new_y ) ;
     current_x = new_x ;

freeglut/freeglut/progs/demos/Makefile.am

@@ -1,2 +1,2 @@
 EXTRA_DIST = demos.dsw
-SUBDIRS = Fractals Fractals_random Lorenz One
+SUBDIRS = CallbackMaker Fractals Fractals_random Lorenz One