X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Ffg_callbacks.c;h=5f94b65816d9c0451c9ab9f6d0efe0805ae819f9;hb=831749819dcdc1ea884c18607c2b447bbf5fca72;hp=b09f421021d9a5bd3214bf574976d00fca852c4f;hpb=76bb5e2f2b60a3cb15fe7fa0142d80a89065cf30;p=freeglut diff --git a/src/fg_callbacks.c b/src/fg_callbacks.c index b09f421..5f94b65 100644 --- a/src/fg_callbacks.c +++ b/src/fg_callbacks.c @@ -42,7 +42,7 @@ void FGAPIENTRY glutIdleFuncUcall( FGCBIdleUC callback, FGCBUserData userData ) fgState.IdleCallbackData = userData; } -void glutIdleFuncCallback( void* userData ) +static void glutIdleFuncCallback( FGCBUserData userData ) { FGCBIdle callback = (FGCBIdle)userData; callback(); @@ -51,7 +51,10 @@ void glutIdleFuncCallback( void* userData ) void FGAPIENTRY glutIdleFunc( FGCBIdle callback ) { FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutIdleFunc" ); - glutIdleFuncUcall( glutIdleFuncCallback, (FGCBUserData)callback ); + if( callback ) + glutIdleFuncUcall( glutIdleFuncCallback, (FGCBUserData)callback ); + else + glutIdleFuncUcall( NULL, NULL ); } /* Creates a timer and sets its callback */ @@ -87,7 +90,7 @@ void FGAPIENTRY glutTimerFuncUcall( unsigned int timeOut, FGCBTimerUC callback, fgListInsert( &fgState.Timers, &node->Node, &timer->Node ); } -void glutTimerFuncCallback( int ID, FGCBUserData userData ) +static void glutTimerFuncCallback( int ID, FGCBUserData userData ) { FGCBTimer callback = (FGCBTimer)userData; callback( ID ); @@ -96,7 +99,10 @@ void glutTimerFuncCallback( int ID, FGCBUserData userData ) void FGAPIENTRY glutTimerFunc( unsigned int timeOut, FGCBTimer callback, int timerID ) { FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutTimerFunc" ); - glutTimerFuncUcall( timeOut, glutTimerFuncCallback, timerID, (FGCBUserData)callback ); + if( callback ) + glutTimerFuncUcall( timeOut, glutTimerFuncCallback, timerID, (FGCBUserData)callback ); + else + glutTimerFuncUcall( timeOut, NULL, timerID, NULL ); } /* Deprecated version of glutMenuStatusFunc callback setting method */ @@ -107,10 +113,26 @@ void FGAPIENTRY glutMenuStateFunc( FGCBMenuState callback ) } /* Sets the global menu status callback for the current window */ +void FGAPIENTRY glutMenuStatusFuncUCall( FGCBMenuStatusUC callback, FGCBUserData userData ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuStatusFuncUCall" ); + fgState.MenuStatusCallback = callback; + fgState.MenuStatusCallbackData = userData; +} + +static void glutMenuStatusFuncCallback( int menuState, int mouseX, int mouseY, FGCBUserData userData ) +{ + FGCBMenuStatus callback = (FGCBMenuStatus)userData; + callback( menuState, mouseX, mouseY ); +} + void FGAPIENTRY glutMenuStatusFunc( FGCBMenuStatus callback ) { FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuStatusFunc" ); - fgState.MenuStatusCallback = callback; + if( callback ) + glutMenuStatusFuncUCall( glutMenuStatusFuncCallback, (FGCBUserData)callback ); + else + glutMenuStatusFuncUCall( NULL, NULL ); } @@ -118,11 +140,29 @@ void FGAPIENTRY glutMenuStatusFunc( FGCBMenuStatus callback ) * Menu specific callbacks. */ /* Callback upon menu destruction */ -void FGAPIENTRY glutMenuDestroyFunc( FGCBDestroy callback ) +void FGAPIENTRY glutMenuDestroyFuncUcall( FGCBDestroyUC callback, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuDestroyFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuDestroyFuncUcall" ); if( fgStructure.CurrentMenu ) + { fgStructure.CurrentMenu->Destroy = callback; + fgStructure.CurrentMenu->DestroyData = userData; + } +} + +static void glutMenuDestroyFuncCallback( FGCBUserData userData ) +{ + FGCBDestroy callback = (FGCBDestroy)userData; + callback(); +} + +void FGAPIENTRY glutMenuDestroyFunc( FGCBDestroy callback ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuDestroyFunc" ); + if( callback ) + glutMenuDestroyFuncUcall( glutMenuDestroyFuncCallback, (FGCBUserData)callback ); + else + glutMenuDestroyFuncUcall( NULL, NULL ); } @@ -134,75 +174,191 @@ do \ { \ if( fgStructure.CurrentWindow == NULL ) \ return; \ - SET_WCB( ( *( fgStructure.CurrentWindow ) ), a, callback ); \ + SET_WCB( ( *( fgStructure.CurrentWindow ) ), a, callback, userData ); \ } while( 0 ) /* + * Types need to be defined for callbacks. It's not ideal, but it works for this. + */ +#define IMPLEMENT_CALLBACK_FUNC_CB_ARG0(a,b) \ +static void glut##a##FuncCallback( FGCBUserData userData ) \ +{ \ + FGCB##b callback = (FGCB##b)userData; \ + callback(); \ +} +#define IMPLEMENT_CALLBACK_FUNC_CB_ARG1(a,b) \ +static void glut##a##FuncCallback( int arg1val, FGCBUserData userData ) \ +{ \ + FGCB##b callback = (FGCB##b)userData; \ + callback( arg1val ); \ +} +#define IMPLEMENT_CALLBACK_FUNC_CB_ARG2(a,b) \ +static void glut##a##FuncCallback( int arg1val, int arg2val, FGCBUserData userData ) \ +{ \ + FGCB##b callback = (FGCB##b)userData; \ + callback( arg1val, arg2val ); \ +} +#define IMPLEMENT_CALLBACK_FUNC_CB_ARG3_USER(a,b,arg1,arg2,arg3) \ +static void glut##a##FuncCallback( arg1 arg1val, arg2 arg2val, arg3 arg3val, FGCBUserData userData ) \ +{ \ + FGCB##b callback = (FGCB##b)userData; \ + callback( arg1val, arg2val, arg3val ); \ +} +#define IMPLEMENT_CALLBACK_FUNC_CB_ARG3(a,b) IMPLEMENT_CALLBACK_FUNC_CB_ARG3_USER(a,b,int,int,int) +#define IMPLEMENT_CALLBACK_FUNC_CB_ARG4(a,b) \ +static void glut##a##FuncCallback( int arg1val, int arg2val, int arg3val, int arg4val, FGCBUserData userData ) \ +{ \ + FGCB##b callback = (FGCB##b)userData; \ + callback( arg1val, arg2val, arg3val, arg4val ); \ +} +#define IMPLEMENT_CALLBACK_FUNC_CB_ARG5(a,b) \ +static void glut##a##FuncCallback( int arg1val, int arg2val, int arg3val, int arg4val, int arg5val, FGCBUserData userData ) \ +{ \ + FGCB##b callback = (FGCB##b)userData; \ + callback( arg1val, arg2val, arg3val, arg4val, arg5val ); \ +} +/* * And almost every time the callback setter function can be implemented like this: */ -#define IMPLEMENT_CALLBACK_FUNC_2NAME(a,b) \ -void FGAPIENTRY glut##a##Func( FGCB##b callback ) \ +#define IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,b) \ +void FGAPIENTRY glut##a##FuncUcall( FGCB##b##UC callback, FGCBUserData userData ) \ { \ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glut"#a"Func" ); \ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glut"#a"FuncUcall" ); \ SET_CALLBACK( b ); \ +} \ +void FGAPIENTRY glut##a##Func( FGCB##b callback ) \ +{ \ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glut"#a"Func" ); \ + if( callback ) \ + glut##a##FuncUcall( glut##a##FuncCallback, (FGCBUserData)callback ); \ + else \ + glut##a##FuncUcall( NULL, NULL ); \ } -#define IMPLEMENT_CALLBACK_FUNC(a) IMPLEMENT_CALLBACK_FUNC_2NAME(a,a) +/* + * Combine _glut and _cb macros: + */ +#define IMPLEMENT_CALLBACK_FUNC_ARG0(a) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG0(a,a) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,a) -/* Implement all these callback setter functions... */ -IMPLEMENT_CALLBACK_FUNC(Position) -IMPLEMENT_CALLBACK_FUNC(Keyboard) -IMPLEMENT_CALLBACK_FUNC(KeyboardUp) -IMPLEMENT_CALLBACK_FUNC(Special) -IMPLEMENT_CALLBACK_FUNC(SpecialUp) -IMPLEMENT_CALLBACK_FUNC(Mouse) -IMPLEMENT_CALLBACK_FUNC(MouseWheel) -IMPLEMENT_CALLBACK_FUNC(Motion) -IMPLEMENT_CALLBACK_FUNC_2NAME(PassiveMotion,Passive) -IMPLEMENT_CALLBACK_FUNC(Entry) -/* glutWMCloseFunc is an alias for glutCloseFunc; both set the window's Destroy callback */ -IMPLEMENT_CALLBACK_FUNC_2NAME(Close,Destroy) -IMPLEMENT_CALLBACK_FUNC_2NAME(WMClose,Destroy) -IMPLEMENT_CALLBACK_FUNC(OverlayDisplay) -IMPLEMENT_CALLBACK_FUNC(WindowStatus) -IMPLEMENT_CALLBACK_FUNC(ButtonBox) -IMPLEMENT_CALLBACK_FUNC(Dials) -IMPLEMENT_CALLBACK_FUNC(TabletMotion) -IMPLEMENT_CALLBACK_FUNC(TabletButton) -IMPLEMENT_CALLBACK_FUNC(MultiEntry) -IMPLEMENT_CALLBACK_FUNC(MultiButton) -IMPLEMENT_CALLBACK_FUNC(MultiMotion) -IMPLEMENT_CALLBACK_FUNC(MultiPassive) -IMPLEMENT_CALLBACK_FUNC(InitContext) -IMPLEMENT_CALLBACK_FUNC(AppStatus) +#define IMPLEMENT_CALLBACK_FUNC_ARG0_2NAME(a,b) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG0(a,b) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,b) + +#define IMPLEMENT_CALLBACK_FUNC_ARG1(a) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG1(a,a) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,a) + +#define IMPLEMENT_CALLBACK_FUNC_ARG2(a) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG2(a,a) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,a) +#define IMPLEMENT_CALLBACK_FUNC_ARG2_2NAME(a,b) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG2(a,b) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,b) +#define IMPLEMENT_CALLBACK_FUNC_ARG3(a) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG3(a,a) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,a) + +#define IMPLEMENT_CALLBACK_FUNC_ARG3_USER(a,arg1,arg2,arg3) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG3_USER(a,a,arg1,arg2,arg3)\ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,a) + +#define IMPLEMENT_CALLBACK_FUNC_ARG4(a) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG4(a,a) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,a) + +#define IMPLEMENT_CALLBACK_FUNC_ARG5(a) \ + IMPLEMENT_CALLBACK_FUNC_CB_ARG5(a,a) \ + IMPLEMENT_CALLBACK_FUNC_2NAME_GLUT(a,a) + +/* Implement all these callback setter functions... */ +IMPLEMENT_CALLBACK_FUNC_ARG2(Position) +IMPLEMENT_CALLBACK_FUNC_ARG3_USER(Keyboard,unsigned char,int,int) +IMPLEMENT_CALLBACK_FUNC_ARG3_USER(KeyboardUp,unsigned char,int,int) +IMPLEMENT_CALLBACK_FUNC_ARG3(Special) +IMPLEMENT_CALLBACK_FUNC_ARG3(SpecialUp) +IMPLEMENT_CALLBACK_FUNC_ARG4(Mouse) +IMPLEMENT_CALLBACK_FUNC_ARG4(MouseWheel) +IMPLEMENT_CALLBACK_FUNC_ARG2(Motion) +IMPLEMENT_CALLBACK_FUNC_ARG2_2NAME(PassiveMotion,Passive) +IMPLEMENT_CALLBACK_FUNC_ARG1(Entry) +/* glutWMCloseFunc is an alias for glutCloseFunc; both set the window's Destroy callback */ +IMPLEMENT_CALLBACK_FUNC_ARG0_2NAME(Close,Destroy) +IMPLEMENT_CALLBACK_FUNC_ARG0_2NAME(WMClose,Destroy) +IMPLEMENT_CALLBACK_FUNC_ARG0(OverlayDisplay) +IMPLEMENT_CALLBACK_FUNC_ARG1(WindowStatus) +IMPLEMENT_CALLBACK_FUNC_ARG2(ButtonBox) +IMPLEMENT_CALLBACK_FUNC_ARG2(Dials) +IMPLEMENT_CALLBACK_FUNC_ARG2(TabletMotion) +IMPLEMENT_CALLBACK_FUNC_ARG4(TabletButton) +IMPLEMENT_CALLBACK_FUNC_ARG2(MultiEntry) +IMPLEMENT_CALLBACK_FUNC_ARG5(MultiButton) +IMPLEMENT_CALLBACK_FUNC_ARG3(MultiMotion) +IMPLEMENT_CALLBACK_FUNC_ARG3(MultiPassive) +IMPLEMENT_CALLBACK_FUNC_ARG0(InitContext) +IMPLEMENT_CALLBACK_FUNC_ARG1(AppStatus) /* * Sets the Display callback for the current window */ -void FGAPIENTRY glutDisplayFunc( FGCBDisplay callback ) +void FGAPIENTRY glutDisplayFuncUcall( FGCBDisplayUC callback, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDisplayFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDisplayFuncUcall" ); if( !callback ) fgError( "Fatal error in program. NULL display callback not " "permitted in GLUT 3.0+ or freeglut 2.0.1+" ); SET_CALLBACK( Display ); } -void fghDefaultReshape(int width, int height) +static void glutDisplayFuncCallback( FGCBUserData userData ) +{ + FGCBDisplay callback = (FGCBDisplay)userData; + callback(); +} + +void FGAPIENTRY glutDisplayFunc( FGCBDisplay callback ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDisplayFunc" ); + if( callback ) + glutDisplayFuncUcall( glutDisplayFuncCallback, (FGCBUserData)callback ); + else + glutDisplayFuncUcall( NULL, NULL ); +} + +void fghDefaultReshape( int width, int height, FGCBUserData userData ) { glViewport( 0, 0, width, height ); } -void FGAPIENTRY glutReshapeFunc( FGCBReshape callback ) +void FGAPIENTRY glutReshapeFuncUcall( FGCBReshapeUC callback, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutReshapeFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutReshapeFuncUcall" ); if( !callback ) + { callback = fghDefaultReshape; + userData = NULL; + } SET_CALLBACK( Reshape ); } +static void glutReshapeFuncCallback( int width, int height, FGCBUserData userData ) +{ + FGCBReshape callback = (FGCBReshape)userData; + callback( width, height ); +} + +void FGAPIENTRY glutReshapeFunc( FGCBReshape callback ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutReshapeFunc" ); + if( callback ) + glutReshapeFuncUcall( glutReshapeFuncCallback, (FGCBUserData)callback ); + else + glutReshapeFuncUcall( NULL, NULL ); +} + /* * Sets the Visibility callback for the current window. * NB: the Visibility func is deprecated in favor of the WindowStatus func, @@ -218,7 +374,7 @@ void FGAPIENTRY glutReshapeFunc( FGCBReshape callback ) * http://stackoverflow.com/questions/5445889/get-which-process-window-is-actually-visible-in-c-sharp * for an implementation outline (but it would be polling based, not push based). */ -static void fghVisibility( int status ) +static void fghVisibility( int status, FGCBUserData userData ) { int vis_status; @@ -234,23 +390,44 @@ static void fghVisibility( int status ) INVOKE_WCB( *( fgStructure.CurrentWindow ), Visibility, ( vis_status ) ); } -void FGAPIENTRY glutVisibilityFunc( FGCBVisibility callback ) +void FGAPIENTRY glutVisibilityFuncUcall( FGCBVisibilityUC callback, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutVisibilityFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutVisibilityFuncUcall" ); + + if ( !callback ) + { + userData = NULL; + } + SET_CALLBACK( Visibility ); if( callback ) - glutWindowStatusFunc( fghVisibility ); + glutWindowStatusFuncUcall( fghVisibility, NULL ); else - glutWindowStatusFunc( NULL ); + glutWindowStatusFuncUcall( NULL, NULL ); +} + +static void glutVisibilityFuncCallback( int visibility, FGCBUserData userData ) +{ + FGCBVisibility callback = (FGCBVisibility)userData; + callback( visibility ); +} + +void FGAPIENTRY glutVisibilityFunc( FGCBVisibility callback ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutVisibilityFunc" ); + if( callback ) + glutVisibilityFuncUcall( glutVisibilityFuncCallback, (FGCBUserData)callback ); + else + glutVisibilityFuncUcall( NULL, NULL ); } /* * Sets the joystick callback and polling rate for the current window */ -void FGAPIENTRY glutJoystickFunc( FGCBJoystick callback, int pollInterval ) +void FGAPIENTRY glutJoystickFuncUcall( FGCBJoystickUC callback, int pollInterval, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutJoystickFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutJoystickFuncUcall" ); fgInitialiseJoysticks (); if ( ( @@ -281,39 +458,97 @@ void FGAPIENTRY glutJoystickFunc( FGCBJoystick callback, int pollInterval ) fgStructure.CurrentWindow->State.JoystickLastPoll -= pollInterval; } +static void glutJoystickFuncCallback( unsigned int buttons, int axis0, int axis1, int axis2, FGCBUserData userData ) +{ + FGCBJoystick callback = (FGCBJoystick)userData; + callback( buttons, axis0, axis1, axis2 ); +} +void FGAPIENTRY glutJoystickFunc( FGCBJoystick callback, int pollInterval ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutJoystickFunc" ); + if( callback ) + glutJoystickFuncUcall( glutJoystickFuncCallback, pollInterval, (FGCBUserData)callback ); + else + glutJoystickFuncUcall( NULL, pollInterval, NULL ); +} /* * Sets the spaceball motion callback for the current window */ -void FGAPIENTRY glutSpaceballMotionFunc( FGCBSpaceMotion callback ) +void FGAPIENTRY glutSpaceballMotionFuncUcall( FGCBSpaceMotionUC callback, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballMotionFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballMotionFuncUcall" ); fgInitialiseSpaceball(); SET_CALLBACK( SpaceMotion ); } +static void glutSpaceballMotionFuncCallback( int x, int y, int z, FGCBUserData userData ) +{ + FGCBSpaceMotion callback = (FGCBSpaceMotion)userData; + callback( x, y, z ); +} + +void FGAPIENTRY glutSpaceballMotionFunc( FGCBSpaceMotion callback ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballMotionFunc" ); + if( callback ) + glutSpaceballMotionFuncUcall( glutSpaceballMotionFuncCallback, (FGCBUserData)callback ); + else + glutSpaceballMotionFuncUcall( NULL, NULL ); +} + /* * Sets the spaceball rotate callback for the current window */ -void FGAPIENTRY glutSpaceballRotateFunc( FGCBSpaceRotation callback ) +void FGAPIENTRY glutSpaceballRotateFuncUcall( FGCBSpaceRotationUC callback, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballRotateFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballRotateFuncUcall" ); fgInitialiseSpaceball(); SET_CALLBACK( SpaceRotation ); } +static void glutSpaceballRotateFuncCallback( int x, int y, int z, FGCBUserData userData ) +{ + FGCBSpaceRotation callback = (FGCBSpaceRotation)userData; + callback( x, y, z ); +} + +void FGAPIENTRY glutSpaceballRotateFunc( FGCBSpaceRotation callback ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballRotateFunc" ); + if( callback ) + glutSpaceballRotateFuncUcall( glutSpaceballRotateFuncCallback, (FGCBUserData)callback ); + else + glutSpaceballRotateFuncUcall( NULL, NULL ); +} + /* * Sets the spaceball button callback for the current window */ -void FGAPIENTRY glutSpaceballButtonFunc( FGCBSpaceButton callback ) +void FGAPIENTRY glutSpaceballButtonFuncUcall( FGCBSpaceButtonUC callback, FGCBUserData userData ) { - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballButtonFunc" ); + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballButtonFuncUcall" ); fgInitialiseSpaceball(); SET_CALLBACK( SpaceButton ); } +static void glutSpaceballButtonFuncCallback( int button, int buttonState, FGCBUserData userData ) +{ + FGCBSpaceButton callback = (FGCBSpaceButton)userData; + callback( button, buttonState ); +} + +void FGAPIENTRY glutSpaceballButtonFunc( FGCBSpaceButton callback ) +{ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpaceballButtonFunc" ); + if( callback ) + glutSpaceballButtonFuncUcall( glutSpaceballButtonFuncCallback, (FGCBUserData)callback ); + else + glutSpaceballButtonFuncUcall( NULL, NULL ); +} + /*** END OF FILE ***/