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more cleanup in callbackmaker demo, now showing best practice for

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various callback. also added menustate/menustatus callbacks


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1468 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dcnieho 2012-11-22 05:52:02 +00:00
parent d07f4255be
commit 419e4793b0
1 changed files with 55 additions and 30 deletions
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85
freeglut/freeglut/progs/demos/CallbackMaker/CallbackMaker.c
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@ -53,7 +53,11 @@ CALLBACK_CALLED_VAR(dials);
CALLBACK_CALLED_VAR(tabletmotion); CALLBACK_CALLED_VAR(tabletmotion);
CALLBACK_CALLED_VAR(tabletbutton); CALLBACK_CALLED_VAR(tabletbutton);
CALLBACK_CALLED_VAR(menustatus);*/ CALLBACK_CALLED_VAR(menustatus);*/
int menudestroy_called = 0 ; /* menudestroy is registered on menu, so don't use above */ /* menudestroy is registered on each menu, not a window */
int menudestroy_called = 0 ;
/* menustatus and menustate are global callbacks, set for all menus at the same time */
int menustatus_called = 0;
int menustate_called = 0;
#define STRING_LENGTH 10 #define STRING_LENGTH 10
@ -460,32 +464,45 @@ TabletButton(int button, int updown, int x, int y)
} }
static void static void
MenuCallback ( int menuID ) MenuCallback ( int value )
{ {
int menu = glutGetMenu();
int window = getWindowAndIdx(NULL); int window = getWindowAndIdx(NULL);
printf( "%6d Window %d MenuCallback - menuID is %d\n", printf( "%6d Menu %d MenuCallback for menu opened in Window %d - value is %d\n",
++sequence_number, window, menuID ); ++sequence_number, menu, window, value );
} }
static void static void
MenuDestroy( void ) MenuDestroy( void )
{ {
int window = getWindowAndIdx(NULL); int menu = glutGetMenu();
menudestroy_called = 1 ; menudestroy_called = 1 ;
printf ( "%6d Window %d MenuDestroy Callback\n", printf ( "%6d Menu %d MenuDestroy Callback\n",
++sequence_number, window ) ; ++sequence_number, menu ) ;
if (window) /* When destroyed when shutting down, not always a window defined... */
glutPostRedisplay () ;
} }
static void static void
MenuStatus( int status, int x, int y ) MenuStatus( int status, int x, int y )
{ {
/* Menu and window for which this event is triggered are current when the callback is called */
int menu = glutGetMenu();
int window = getWindowAndIdx(NULL); int window = getWindowAndIdx(NULL);
menudestroy_called = 1 ; menustatus_called = 1 ;
printf ( "%6d Window %d MenuStatus Callback: %d %d %d\n", printf ( "%6d Menu %d MenuStatus Callback in Window %d: %d %d %d\n",
++sequence_number, window, status, x, y ) ; ++sequence_number, menu, window, status, x, y ) ;
glutPostRedisplay () ;
}
static void
MenuState( int status )
{
/* Menu and window for which this event is triggered are current when the callback is called */
int menu = glutGetMenu();
int window = getWindowAndIdx(NULL);
menustate_called = 1 ;
printf ( "%6d Menu %d MenuState Callback in Window %d: %d\n",
++sequence_number, menu, window, status) ;
glutPostRedisplay () ; glutPostRedisplay () ;
} }
@ -509,11 +526,17 @@ main(int argc, char *argv[])
glutInit(&argc, argv); glutInit(&argc, argv);
glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE,GLUT_ACTION_CONTINUE_EXECUTION); glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE,GLUT_ACTION_CONTINUE_EXECUTION);
/* Set other global callback (global as in not associated with any specific menu or window) */
glutIdleFunc ( Idle );
glutMenuStatusFunc ( MenuStatus );
glutMenuStateFunc ( MenuState ); /* Note that glutMenuStatusFunc is an enhanced version of the deprecated glutMenuStateFunc. */
windows[0] = glutCreateWindow( "Callback Demo" ); windows[0] = glutCreateWindow( "Callback Demo" );
printf ( "Creating window %d as 'Callback Demo'\n", windows[0] ) ; printf ( "Creating window %d as 'Callback Demo'\n", windows[0] ) ;
glClearColor(1.0, 1.0, 1.0, 1.0); glClearColor(1.0, 1.0, 1.0, 1.0);
/* callbacks and settings specific to this window */
glutDisplayFunc( Display ); glutDisplayFunc( Display );
glutReshapeFunc( Reshape ); glutReshapeFunc( Reshape );
glutKeyboardFunc( Key ); glutKeyboardFunc( Key );
@ -537,31 +560,30 @@ main(int argc, char *argv[])
glutDialsFunc ( Dials ) ; glutDialsFunc ( Dials ) ;
glutTabletMotionFunc ( TabletMotion ) ; glutTabletMotionFunc ( TabletMotion ) ;
glutTabletButtonFunc ( TabletButton ) ; glutTabletButtonFunc ( TabletButton ) ;
glutMenuStatusFunc ( MenuStatus );
glutSetKeyRepeat(GLUT_KEY_REPEAT_OFF) ; glutSetKeyRepeat(GLUT_KEY_REPEAT_OFF) ;
subMenuA = glutCreateMenu( MenuCallback ); subMenuA = glutCreateMenu( MenuCallback );
glutAddMenuEntry( "Sub menu A1 (01)", 1 ); glutAddMenuEntry( "Sub menu A1 (01)", 11 );
glutAddMenuEntry( "Sub menu A2 (02)", 2 ); glutAddMenuEntry( "Sub menu A2 (02)", 12 );
glutAddMenuEntry( "Sub menu A3 (03)", 3 ); glutAddMenuEntry( "Sub menu A3 (03)", 13 );
glutMenuDestroyFunc ( MenuDestroy ); glutMenuDestroyFunc ( MenuDestroy ); /* callback specific to this menu */
subMenuB = glutCreateMenu( MenuCallback ); subMenuB = glutCreateMenu( MenuCallback );
glutAddMenuEntry( "Sub menu B1 (04)", 4 ); glutAddMenuEntry( "Sub menu B1 (04)", 14 );
glutAddMenuEntry( "Sub menu B2 (05)", 5 ); glutAddMenuEntry( "Sub menu B2 (05)", 15 );
glutAddMenuEntry( "Sub menu B3 (06)", 6 ); glutAddMenuEntry( "Sub menu B3 (06)", 16 );
glutAddSubMenu( "Going to sub menu A", subMenuA ); glutAddSubMenu( "Going to sub menu A", subMenuA );
glutMenuDestroyFunc ( MenuDestroy ); glutMenuDestroyFunc ( MenuDestroy ); /* callback specific to this menu */
menuID = glutCreateMenu( MenuCallback ); menuID = glutCreateMenu( MenuCallback );
glutAddMenuEntry( "Entry one", 1 ); glutAddMenuEntry( "Entry one", 21 );
glutAddMenuEntry( "Entry two", 2 ); glutAddMenuEntry( "Entry two", 22 );
glutAddMenuEntry( "Entry three", 3 ); glutAddMenuEntry( "Entry three", 23 );
glutAddMenuEntry( "Entry four", 4 ); glutAddMenuEntry( "Entry four", 24 );
glutAddMenuEntry( "Entry five", 5 ); glutAddMenuEntry( "Entry five", 25 );
glutAddSubMenu( "Enter sub menu A", subMenuA ); glutAddSubMenu( "Enter sub menu A", subMenuA );
glutAddSubMenu( "Enter sub menu B", subMenuB ); glutAddSubMenu( "Enter sub menu B", subMenuB );
glutMenuDestroyFunc ( MenuDestroy ); glutMenuDestroyFunc ( MenuDestroy ); /* callback specific to this menu */
glutAttachMenu( GLUT_LEFT_BUTTON ); glutAttachMenu( GLUT_LEFT_BUTTON );
@ -572,6 +594,7 @@ main(int argc, char *argv[])
glClearColor(1.0, 1.0, 1.0, 1.0); glClearColor(1.0, 1.0, 1.0, 1.0);
/* callbacks and settings specific to this window */
glutDisplayFunc( Display ); glutDisplayFunc( Display );
glutReshapeFunc( Reshape ); glutReshapeFunc( Reshape );
glutKeyboardFunc( Key ); glutKeyboardFunc( Key );
@ -597,7 +620,9 @@ main(int argc, char *argv[])
glutTabletButtonFunc ( TabletButton ) ; glutTabletButtonFunc ( TabletButton ) ;
glutSetKeyRepeat(GLUT_KEY_REPEAT_OFF) ; glutSetKeyRepeat(GLUT_KEY_REPEAT_OFF) ;
glutIdleFunc ( Idle ); glutSetMenu(subMenuB);
glutAttachMenu( GLUT_RIGHT_BUTTON );
printf ( "Please enter something to continue: " ); printf ( "Please enter something to continue: " );
fgets ( dummy_string, STRING_LENGTH, stdin ); fgets ( dummy_string, STRING_LENGTH, stdin );
@ -606,5 +631,5 @@ main(int argc, char *argv[])
printf ( "Back from the 'freeglut' main loop\n" ) ; printf ( "Back from the 'freeglut' main loop\n" ) ;
return 0; /* ANSI C requires main to return int. */ return EXIT_SUCCESS;
} }