4 * The windows message processing methods.
6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
8 * Creation date: Fri Dec 3 1999
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 #include "../include/GL/freeglut.h"
33 #include "freeglut_internal.h"
36 #if TARGET_HOST_UNIX_X11
37 #include <sys/types.h>
42 #elif TARGET_HOST_WIN32
46 #define MAX(a,b) (((a)>(b)) ? (a) : (b))
50 #define MIN(a,b) (((a)<(b)) ? (a) : (b))
55 * TODO BEFORE THE STABLE RELEASE:
57 * There are some issues concerning window redrawing under X11, and maybe
58 * some events are not handled. The Win32 version lacks some more features,
59 * but seems acceptable for not demanding purposes.
61 * Need to investigate why the X11 version breaks out with an error when
62 * closing a window (using the window manager, not glutDestroyWindow)...
65 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
68 * Handle a window configuration change. When no reshape
69 * callback is hooked, the viewport size is updated to
70 * match the new window size.
72 static void fghReshapeWindowByHandle ( SFG_WindowHandleType handle,
73 int width, int height )
75 SFG_Window *current_window = fgStructure.Window;
77 SFG_Window* window = fgWindowByHandle( handle );
78 freeglut_return_if_fail( window != NULL );
81 #if TARGET_HOST_UNIX_X11
83 XResizeWindow( fgDisplay.Display, window->Window.Handle,
85 XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
87 #elif TARGET_HOST_WIN32
93 GetWindowRect( window->Window.Handle, &winRect );
97 if ( window->Parent == NULL )
100 * Adjust the size of the window to allow for the size of the
101 * frame, if we are not a menu
103 if ( ! window->IsMenu )
105 width += GetSystemMetrics( SM_CXSIZEFRAME ) * 2;
106 height += GetSystemMetrics( SM_CYSIZEFRAME ) * 2 +
107 GetSystemMetrics( SM_CYCAPTION );
112 GetWindowRect( window->Parent->Window.Handle,
114 x -= winRect.left + GetSystemMetrics( SM_CXSIZEFRAME );
115 y -= winRect.top + GetSystemMetrics( SM_CYSIZEFRAME ) +
116 GetSystemMetrics( SM_CYCAPTION );
120 window->Window.Handle,
129 if( FETCH_WCB( *window, Reshape ) )
130 INVOKE_WCB( *window, Reshape, ( width, height ) );
133 fgSetWindow( window );
134 glViewport( 0, 0, width, height );
140 * Force a window redraw. In Windows at least this is only a partial
141 * solution: if the window is increasing in size in either dimension,
142 * the already-drawn part does not get drawn again and things look funny.
143 * But without this we get this bad behaviour whenever we resize the
146 window->State.Redisplay = GL_TRUE;
149 fgSetWindow( current_window );
153 * Calls a window's redraw method. This is used when
154 * a redraw is forced by the incoming window messages.
156 static void fghRedrawWindowByHandle ( SFG_WindowHandleType handle )
158 SFG_Window* window = fgWindowByHandle( handle );
159 freeglut_return_if_fail( window );
160 freeglut_return_if_fail( FETCH_WCB ( *window, Display ) );
162 window->State.Redisplay = GL_FALSE;
164 freeglut_return_if_fail( window->State.Visible );
166 if( window->State.NeedToResize )
168 SFG_Window *current_window = fgStructure.Window;
170 fgSetWindow( window );
172 fghReshapeWindowByHandle(
173 window->Window.Handle,
178 window->State.NeedToResize = GL_FALSE;
179 fgSetWindow ( current_window );
182 INVOKE_WCB( *window, Display, ( ) );
186 * A static helper function to execute display callback for a window
188 static void fghcbDisplayWindow( SFG_Window *window,
189 SFG_Enumerator *enumerator )
191 if( window->State.Redisplay &&
192 window->State.Visible )
195 * XXX Resizing should *not* depend upon whether there
196 * XXX is a pending redisplay flag, as far as I can tell.
198 * XXX Note, too, that the {NeedToResize} flag is a little
199 * XXX fuzzy in its meaning, since for WIN32, this also
200 * XXX means "we need to tell the application that the window has
201 * XXX changed size", while in X11, it only means "we need
202 * XXX to ask the window system to resize the window.
203 * XXX Splitting the flag's meaning might be desirable, but
204 * XXX that could complicate the code more. (On X11, the
205 * XXX user callback is called as soon as the event is
206 * XXX discovered, but resizing the window is postponed
207 * XXX until after other events.)
209 if( window->State.NeedToResize )
211 SFG_Window *current_window = fgStructure.Window;
213 fgSetWindow( window );
215 fghReshapeWindowByHandle(
216 window->Window.Handle,
221 window->State.NeedToResize = GL_FALSE;
222 fgSetWindow ( current_window );
225 window->State.Redisplay = GL_FALSE;
227 #if TARGET_HOST_UNIX_X11
229 SFG_Window *current_window = fgStructure.Window;
231 INVOKE_WCB( *window, Display, ( ) );
232 fgSetWindow( current_window );
234 #elif TARGET_HOST_WIN32
236 window->Window.Handle, NULL, NULL,
237 RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE | RDW_UPDATENOW
242 fgEnumSubWindows( window, fghcbDisplayWindow, enumerator );
246 * Make all windows perform a display call
248 static void fghDisplayAll( void )
250 SFG_Enumerator enumerator;
252 enumerator.found = GL_FALSE;
253 enumerator.data = NULL;
255 fgEnumWindows( fghcbDisplayWindow, &enumerator );
259 * Window enumerator callback to check for the joystick polling code
261 static void fghcbCheckJoystickPolls( SFG_Window *window,
262 SFG_Enumerator *enumerator )
264 long int checkTime = fgElapsedTime( );
266 if( window->State.JoystickLastPoll + window->State.JoystickPollRate <=
269 fgJoystickPollWindow( window );
270 window->State.JoystickLastPoll = checkTime;
273 fgEnumSubWindows( window, fghcbCheckJoystickPolls, enumerator );
277 * Check all windows for joystick polling
279 static void fghCheckJoystickPolls( void )
281 SFG_Enumerator enumerator;
283 enumerator.found = GL_FALSE;
284 enumerator.data = NULL;
286 fgEnumWindows( fghcbCheckJoystickPolls, &enumerator );
290 * Check the global timers
292 static void fghCheckTimers( void )
294 long checkTime = fgElapsedTime( );
297 while( timer = fgState.Timers.First )
299 if( timer->TriggerTime > checkTime )
302 fgListRemove( &fgState.Timers, &timer->Node );
303 fgListAppend( &fgState.FreeTimers, &timer->Node );
305 timer->Callback( timer->ID );
312 long fgElapsedTime( void )
314 if ( fgState.Time.Set )
316 #if TARGET_HOST_UNIX_X11
320 gettimeofday( &now, NULL );
322 elapsed = (now.tv_usec - fgState.Time.Value.tv_usec) / 1000;
323 elapsed += (now.tv_sec - fgState.Time.Value.tv_sec) * 1000;
326 #elif TARGET_HOST_WIN32
327 return timeGetTime() - fgState.Time.Value;
332 #if TARGET_HOST_UNIX_X11
333 gettimeofday( &fgState.Time.Value, NULL );
334 #elif TARGET_HOST_WIN32
335 fgState.Time.Value = timeGetTime ();
337 fgState.Time.Set = GL_TRUE ;
346 void fgError( const char *fmt, ... )
352 fprintf( stderr, "freeglut ");
353 if( fgState.ProgramName )
354 fprintf (stderr, "(%s): ", fgState.ProgramName);
355 vfprintf( stderr, fmt, ap );
356 fprintf( stderr, "\n" );
360 if ( fgState.Initialised )
366 void fgWarning( const char *fmt, ... )
372 fprintf( stderr, "freeglut ");
373 if( fgState.ProgramName )
374 fprintf( stderr, "(%s): ", fgState.ProgramName );
375 vfprintf( stderr, fmt, ap );
376 fprintf( stderr, "\n" );
382 * Indicates whether Joystick events are being used by ANY window.
384 * The current mechanism is to walk all of the windows and ask if
385 * there is a joystick callback. Certainly in some cases, maybe
386 * in all cases, the joystick is attached to the system and accessed
387 * from ONE point by GLUT/freeglut, so this is not the right way,
388 * in general, to do this. However, the Joystick code is segregated
389 * in its own little world, so we can't access the information that
390 * we need in order to do that nicely.
393 * * Store Joystick data into freeglut global state.
394 * * Provide NON-static functions or data from Joystick *.c file.
396 * Basically, the RIGHT way to do this requires knowing something
397 * about the Joystick. Right now, the Joystick code is behind
401 static void fgCheckJoystickCallback( SFG_Window* w, SFG_Enumerator* e)
403 if( FETCH_WCB( *w, Joystick ) )
408 fgEnumSubWindows( w, fgCheckJoystickCallback, e );
410 static int fgHaveJoystick( void )
412 SFG_Enumerator enumerator;
413 enumerator.found = GL_FALSE;
414 enumerator.data = NULL;
415 fgEnumWindows( fgCheckJoystickCallback, &enumerator );
416 return !!enumerator.data;
418 static void fgHavePendingRedisplaysCallback( SFG_Window* w, SFG_Enumerator* e)
420 if( w->State.Redisplay )
425 fgEnumSubWindows( w, fgHavePendingRedisplaysCallback, e );
427 static int fgHavePendingRedisplays (void)
429 SFG_Enumerator enumerator;
430 enumerator.found = GL_FALSE;
431 enumerator.data = NULL;
432 fgEnumWindows( fgHavePendingRedisplaysCallback, &enumerator );
433 return !!enumerator.data;
436 * Returns the number of GLUT ticks (milliseconds) till the next timer event.
438 static long fgNextTimer( void )
441 SFG_Timer *timer = fgState.Timers.First;
444 ret = timer->TriggerTime - fgElapsedTime();
451 * Does the magic required to relinquish the CPU until something interesting
454 static void fgSleepForEvents( void )
456 #if TARGET_HOST_UNIX_X11
463 if( fgState.IdleCallback || fgHavePendingRedisplays( ) )
465 socket = ConnectionNumber( fgDisplay.Display );
467 FD_SET( socket, &fdset );
469 msec = fgNextTimer( );
470 if( fgHaveJoystick( ) )
471 msec = MIN( msec, 10 );
473 wait.tv_sec = msec / 1000;
474 wait.tv_usec = (msec % 1000) * 1000;
475 err = select( socket+1, &fdset, NULL, NULL, &wait );
478 fgWarning ( "freeglut select() error: %d\n", errno );
480 #elif TARGET_HOST_WIN32
484 #if TARGET_HOST_UNIX_X11
486 * Returns GLUT modifier mask for an XEvent.
488 int fgGetXModifiers( XEvent *event )
492 if( event->xkey.state & ( ShiftMask | LockMask ) )
493 ret |= GLUT_ACTIVE_SHIFT;
494 if( event->xkey.state & ControlMask )
495 ret |= GLUT_ACTIVE_CTRL;
496 if( event->xkey.state & Mod1Mask )
497 ret |= GLUT_ACTIVE_ALT;
504 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
507 * Executes a single iteration in the freeglut processing loop.
509 void FGAPIENTRY glutMainLoopEvent( void )
511 #if TARGET_HOST_UNIX_X11
516 * This code was repeated constantly, so here it goes into a definition:
518 #define GETWINDOW(a) \
519 window = fgWindowByHandle( event.a.window ); \
520 if( window == NULL ) \
523 #define GETMOUSE(a) \
524 window->State.MouseX = event.a.x; \
525 window->State.MouseY = event.a.y;
527 freeglut_assert_ready;
529 while( XPending( fgDisplay.Display ) )
531 XNextEvent( fgDisplay.Display, &event );
537 * Destroy the window when the WM_DELETE_WINDOW message arrives
539 if( (Atom) event.xclient.data.l[ 0 ] == fgDisplay.DeleteWindow )
541 GETWINDOW( xclient );
543 fgDestroyWindow ( window );
545 if( fgState.ActionOnWindowClose == GLUT_ACTION_EXIT )
551 fgState.ExecState = GLUT_EXEC_STATE_STOP;
557 * CreateNotify causes a configure-event so that sub-windows are
558 * handled compatibly with GLUT. Otherwise, your sub-windows
559 * (in freeglut only) will not get an initial reshape event,
560 * which can break things.
562 * XXX NOTE that it is possible that you will more than one Reshape
563 * XXX event for your top-level window, but something like this
564 * XXX appears to be required for compatbility.
566 * GLUT presumably does this because it generally tries to treat
567 * sub-windows the same as windows.
570 case ConfigureNotify:
571 GETWINDOW( xconfigure );
573 int width = event.xconfigure.width;
574 int height = event.xconfigure.height;
576 GETWINDOW( xconfigure );
577 if( FETCH_WCB( *window, Reshape ) )
578 INVOKE_WCB( *window, Reshape, ( width, height ) );
581 fgSetWindow( window );
582 glViewport( 0, 0, width, height );
589 * This is sent to confirm the XDestroyWindow call.
590 * XXX WHY is this commented out? Should we re-enable it?
592 /* fgAddToWindowDestroyList ( window ); */
597 * We are too dumb to process partial exposes...
598 * XXX Well, we could do it. However, it seems to only
599 * XXX be potentially useful for single-buffered (since
600 * XXX double-buffered does not respect viewport when we
601 * XXX do a buffer-swap).
603 if( event.xexpose.count == 0 )
604 fghRedrawWindowByHandle( event.xexpose.window );
610 * If we never do anything with this, can we just not ask to
611 * get these messages?
617 * Have the client's keyboard knowledge updated (xlib.ps,
618 * page 206, says that's a good thing to do)
620 XRefreshKeyboardMapping( (XMappingEvent *) &event );
623 case VisibilityNotify:
625 GETWINDOW( xvisibility );
626 if( ! FETCH_WCB( *window, WindowStatus ) )
628 fgSetWindow( window );
631 * Sending this event, the X server can notify us that the window
632 * has just acquired one of the three possible visibility states:
633 * VisibilityUnobscured, VisibilityPartiallyObscured or
634 * VisibilityFullyObscured
636 switch( event.xvisibility.state )
638 case VisibilityUnobscured:
639 INVOKE_WCB( *window, WindowStatus, ( GLUT_FULLY_RETAINED ) );
640 window->State.Visible = GL_TRUE;
643 case VisibilityPartiallyObscured:
644 INVOKE_WCB( *window, WindowStatus,
645 ( GLUT_PARTIALLY_RETAINED ) );
646 window->State.Visible = GL_TRUE;
649 case VisibilityFullyObscured:
650 INVOKE_WCB( *window, WindowStatus, ( GLUT_FULLY_COVERED ) );
651 window->State.Visible = GL_FALSE;
655 fgWarning( "Uknown X visibility state: %d",
656 event.xvisibility.state );
664 GETWINDOW( xcrossing );
665 GETMOUSE( xcrossing );
666 INVOKE_WCB( *window, Entry, ( ( EnterNotify == event.type ) ?
673 GETWINDOW( xmotion );
676 if( window->ActiveMenu )
678 if( window == window->ActiveMenu->ParentWindow )
680 window->ActiveMenu->Window->State.MouseX =
681 event.xmotion.x_root - window->ActiveMenu->X;
682 window->ActiveMenu->Window->State.MouseY =
683 event.xmotion.y_root - window->ActiveMenu->Y;
685 window->ActiveMenu->Window->State.Redisplay = GL_TRUE ;
686 fgSetWindow( window->ActiveMenu->ParentWindow );
692 * XXX For more than 5 buttons, just check {event.xmotion.state},
693 * XXX rather than a host of bit-masks?
695 #define BUTTON_MASK \
696 ( Button1Mask | Button2Mask | Button3Mask | Button4Mask | Button5Mask )
697 if ( event.xmotion.state & BUTTON_MASK )
698 INVOKE_WCB( *window, Motion, ( event.xmotion.x,
701 INVOKE_WCB( *window, Passive, ( event.xmotion.x,
709 GLboolean pressed = GL_TRUE;
712 if( event.type == ButtonRelease )
716 * A mouse button has been pressed or released. Traditionally,
717 * break if the window was found within the freeglut structures.
719 GETWINDOW( xbutton );
723 * An X button (at least in XFree86) is numbered from 1.
724 * A GLUT button is numbered from 0.
725 * Old GLUT passed through buttons other than just the first
726 * three, though it only gave symbolic names and official
727 * support to the first three.
729 button = event.xbutton.button - 1;
732 * XXX This comment is replicated in the WIN32 section and
733 * XXX maybe also in the menu code. Can we move the info
734 * XXX to one central place and *reference* it from here?
736 * Do not execute the application's mouse callback if a menu
737 * is hooked to this button. In that case an appropriate
738 * private call should be generated.
739 * Near as I can tell, this is the menu behaviour:
740 * - Down-click the menu button, menu not active: activate
741 * the menu with its upper left-hand corner at the mouse
743 * - Down-click any button outside the menu, menu active:
744 * deactivate the menu
745 * - Down-click any button inside the menu, menu active:
746 * select the menu entry and deactivate the menu
747 * - Up-click the menu button, menu not active: nothing happens
748 * - Up-click the menu button outside the menu, menu active:
750 * - Up-click the menu button inside the menu, menu active:
751 * select the menu entry and deactivate the menu
753 /* Window has an active menu, it absorbs any mouse click */
754 if( window->ActiveMenu )
756 if( window == window->ActiveMenu->ParentWindow )
758 window->ActiveMenu->Window->State.MouseX =
759 event.xbutton.x_root - window->ActiveMenu->X;
760 window->ActiveMenu->Window->State.MouseY =
761 event.xbutton.y_root - window->ActiveMenu->Y;
764 /* In the menu, invoke the callback and deactivate the menu*/
765 if( fgCheckActiveMenu( window->ActiveMenu->Window,
766 window->ActiveMenu ) )
769 * Save the current window and menu and set the current
770 * window to the window whose menu this is
772 SFG_Window *save_window = fgStructure.Window;
773 SFG_Menu *save_menu = fgStructure.Menu;
774 SFG_Window *parent_window =
775 window->ActiveMenu->ParentWindow;
776 fgSetWindow( parent_window );
777 fgStructure.Menu = window->ActiveMenu;
779 /* Execute the menu callback */
780 fgExecuteMenuCallback( window->ActiveMenu );
781 fgDeactivateMenu( parent_window );
783 /* Restore the current window and menu */
784 fgSetWindow( save_window );
785 fgStructure.Menu = save_menu;
789 * Outside the menu, deactivate if it's a downclick
790 * XXX This isn't enough. A downclick outside of
791 * XXX the interior of our freeglut windows should also
792 * XXX deactivate the menu. This is more complicated.
794 fgDeactivateMenu( window->ActiveMenu->ParentWindow );
796 window->State.Redisplay = GL_TRUE;
801 * No active menu, let's check whether we need to activate one.
803 if( ( 0 <= button ) &&
804 ( FREEGLUT_MAX_MENUS > button ) &&
805 ( window->Menu[ button ] ) &&
808 window->State.Redisplay = GL_TRUE;
809 fgSetWindow( window );
810 fgActivateMenu( window, button );
815 * Check if there is a mouse or mouse wheel callback hooked to the
818 if( ! FETCH_WCB( *window, Mouse ) &&
819 ! FETCH_WCB( *window, MouseWheel ) )
822 fgState.Modifiers = fgGetXModifiers( &event );
825 * Finally execute the mouse or mouse wheel callback
827 * XXX Use a symbolic constant, *not* "4"!
829 if( ( button < 3 ) || ( ! FETCH_WCB( *window, MouseWheel ) ) )
830 INVOKE_WCB( *window, Mouse, ( button,
831 pressed ? GLUT_DOWN : GLUT_UP,
838 * Map 4 and 5 to wheel zero; EVEN to +1, ODD to -1
839 * " 6 and 7 " " one; ...
841 * XXX This *should* be behind some variables/macros,
842 * XXX since the order and numbering isn't certain
843 * XXX See XFree86 configuration docs (even back in the
844 * XXX 3.x days, and especially with 4.x).
846 * XXX Note that {button} has already been decremeted
847 * XXX in mapping from X button numbering to GLUT.
849 int wheel_number = (button - 3) / 2;
855 INVOKE_WCB( *window, MouseWheel, ( wheel_number,
863 * Trash the modifiers state
865 fgState.Modifiers = 0xffffffff;
872 FGCBKeyboard keyboard_cb;
873 FGCBSpecial special_cb;
878 if( event.type == KeyPress )
880 keyboard_cb = FETCH_WCB( *window, Keyboard );
881 special_cb = FETCH_WCB( *window, Special );
885 keyboard_cb = FETCH_WCB( *window, KeyboardUp );
886 special_cb = FETCH_WCB( *window, SpecialUp );
890 * Is there a keyboard/special callback hooked for this window?
892 if( keyboard_cb || special_cb )
894 XComposeStatus composeStatus;
895 char asciiCode[ 32 ];
900 * Check for the ASCII/KeySym codes associated with the event:
902 len = XLookupString( &event.xkey, asciiCode, sizeof(asciiCode),
903 &keySym, &composeStatus
907 * GLUT API tells us to have two separate callbacks...
912 * ...one for the ASCII translateable keypresses...
916 fgSetWindow( window );
917 fgState.Modifiers = fgGetXModifiers( &event );
918 keyboard_cb( asciiCode[ 0 ],
919 event.xkey.x, event.xkey.y
921 fgState.Modifiers = 0xffffffff;
929 * ...and one for all the others, which need to be
930 * translated to GLUT_KEY_Xs...
934 case XK_F1: special = GLUT_KEY_F1; break;
935 case XK_F2: special = GLUT_KEY_F2; break;
936 case XK_F3: special = GLUT_KEY_F3; break;
937 case XK_F4: special = GLUT_KEY_F4; break;
938 case XK_F5: special = GLUT_KEY_F5; break;
939 case XK_F6: special = GLUT_KEY_F6; break;
940 case XK_F7: special = GLUT_KEY_F7; break;
941 case XK_F8: special = GLUT_KEY_F8; break;
942 case XK_F9: special = GLUT_KEY_F9; break;
943 case XK_F10: special = GLUT_KEY_F10; break;
944 case XK_F11: special = GLUT_KEY_F11; break;
945 case XK_F12: special = GLUT_KEY_F12; break;
947 case XK_Left: special = GLUT_KEY_LEFT; break;
948 case XK_Right: special = GLUT_KEY_RIGHT; break;
949 case XK_Up: special = GLUT_KEY_UP; break;
950 case XK_Down: special = GLUT_KEY_DOWN; break;
953 case XK_Prior: special = GLUT_KEY_PAGE_UP; break;
955 case XK_Next: special = GLUT_KEY_PAGE_DOWN; break;
957 case XK_Home: special = GLUT_KEY_HOME; break;
959 case XK_End: special = GLUT_KEY_END; break;
961 case XK_Insert: special = GLUT_KEY_INSERT; break;
965 * Execute the callback (if one has been specified),
966 * given that the special code seems to be valid...
968 if( special_cb && (special != -1) )
970 fgSetWindow( window );
971 fgState.Modifiers = fgGetXModifiers( &event );
972 special_cb( special, event.xkey.x, event.xkey.y );
973 fgState.Modifiers = 0xffffffff;
981 break; /* XXX Should disable this event */
984 fgWarning ("Unknown X event type: %d", event.type);
989 #elif TARGET_HOST_WIN32
993 while( PeekMessage( &stMsg, NULL, 0, 0, PM_NOREMOVE ) )
995 if( GetMessage( &stMsg, NULL, 0, 0 ) == 0 )
997 if( fgState.ActionOnWindowClose == GLUT_ACTION_EXIT )
1002 fgState.ExecState = GLUT_EXEC_STATE_STOP;
1006 TranslateMessage( &stMsg );
1007 DispatchMessage( &stMsg );
1011 if( fgState.Timers.First )
1013 fghCheckJoystickPolls( );
1020 * Enters the freeglut processing loop.
1021 * Stays until the "ExecState" changes to "GLUT_EXEC_STATE_STOP".
1023 void FGAPIENTRY glutMainLoop( void )
1025 #if TARGET_HOST_WIN32
1026 SFG_Window *window = (SFG_Window *)fgStructure.Windows.First ;
1029 freeglut_assert_ready;
1031 #if TARGET_HOST_WIN32
1033 * Processing before the main loop: If there is a window which is open and
1034 * which has a visibility callback, call it. I know this is an ugly hack,
1035 * but I'm not sure what else to do about it. Ideally we should leave
1036 * something uninitialized in the create window code and initialize it in
1037 * the main loop, and have that initialization create a "WM_ACTIVATE"
1038 * message. Then we would put the visibility callback code in the
1039 * "case WM_ACTIVATE" block below. - John Fay -- 10/24/02
1043 if ( FETCH_WCB( *window, Visibility ) )
1045 SFG_Window *current_window = fgStructure.Window ;
1047 INVOKE_WCB( *window, Visibility, ( window->State.Visible ) );
1048 fgSetWindow( current_window );
1051 window = (SFG_Window *)window->Node.Next ;
1055 fgState.ExecState = GLUT_EXEC_STATE_RUNNING ;
1056 while( fgState.ExecState == GLUT_EXEC_STATE_RUNNING )
1058 glutMainLoopEvent( );
1060 if( fgStructure.Windows.First == NULL )
1061 fgState.ExecState = GLUT_EXEC_STATE_STOP;
1064 if( fgState.IdleCallback )
1065 fgState.IdleCallback( );
1072 * When this loop terminates, destroy the display, state and structure
1073 * of a freeglut session, so that another glutInit() call can happen
1079 * Leaves the freeglut processing loop.
1081 void FGAPIENTRY glutLeaveMainLoop( void )
1083 fgState.ExecState = GLUT_EXEC_STATE_STOP ;
1087 #if TARGET_HOST_WIN32
1089 * Determine a GLUT modifer mask based on MS-WINDOWS system info.
1091 int fgGetWin32Modifiers (void)
1094 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1095 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1096 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1097 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1098 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1099 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1103 * The window procedure for handling Win32 events
1105 LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam,
1108 SFG_Window* window = fgWindowByHandle( hWnd );
1112 if ( ( window == NULL ) && ( uMsg != WM_CREATE ) )
1113 return DefWindowProc( hWnd, uMsg, wParam, lParam );
1115 /* printf ( "Window %3d message <%04x> %12d %12d\n", window?window->ID:0,
1116 uMsg, wParam, lParam ); */
1121 * The window structure is passed as the creation structure paramter...
1123 window = (SFG_Window *) (((LPCREATESTRUCT) lParam)->lpCreateParams);
1124 assert( window != NULL );
1126 window->Window.Handle = hWnd;
1127 window->Window.Device = GetDC( hWnd );
1128 if( window->IsMenu )
1130 unsigned int current_DisplayMode = fgState.DisplayMode;
1131 fgState.DisplayMode = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH;
1132 fgSetupPixelFormat( window, GL_FALSE, PFD_MAIN_PLANE );
1133 fgState.DisplayMode = current_DisplayMode;
1135 if( fgStructure.MenuContext )
1136 wglMakeCurrent( window->Window.Device,
1137 fgStructure.MenuContext->Context
1141 fgStructure.MenuContext =
1142 (SFG_MenuContext *)malloc( sizeof(SFG_MenuContext) );
1143 fgStructure.MenuContext->Context =
1144 wglCreateContext( window->Window.Device );
1147 /* window->Window.Context = wglGetCurrentContext (); */
1148 window->Window.Context = wglCreateContext( window->Window.Device );
1152 fgSetupPixelFormat( window, GL_FALSE, PFD_MAIN_PLANE );
1154 if( ! fgState.UseCurrentContext )
1155 window->Window.Context =
1156 wglCreateContext( window->Window.Device );
1159 window->Window.Context = wglGetCurrentContext( );
1160 if( ! window->Window.Context )
1161 window->Window.Context =
1162 wglCreateContext( window->Window.Device );
1166 window->State.NeedToResize = GL_TRUE;
1167 window->State.Width = fgState.Size.X;
1168 window->State.Height = fgState.Size.Y;
1170 ReleaseDC( window->Window.Handle, window->Window.Device );
1175 * We got resized... But check if the window has been already added...
1177 window->State.NeedToResize = GL_TRUE;
1178 window->State.Width = LOWORD(lParam);
1179 window->State.Height = HIWORD(lParam);
1183 printf("WM_SETFOCUS: %p\n", window );
1184 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1188 if (LOWORD(wParam) != WA_INACTIVE)
1190 /* glutSetCursor( fgStructure.Window->State.Cursor ); */
1191 printf("WM_ACTIVATE: glutSetCursor( %p, %d)\n", window,
1192 window->State.Cursor );
1193 glutSetCursor( window->State.Cursor );
1196 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1201 * XXX Why not re-use some common code with the glutSetCursor()
1202 * XXX function (or perhaps invoke glutSetCursor())?
1203 * XXX That is, why are we duplicating code, here, from
1204 * XXX glutSetCursor()? The WIN32 code should be able to just
1205 * XXX call glutSetCurdsor() instead of defining two macros
1206 * XXX and implementing a nested case in-line.
1209 /* Set the cursor AND change it for this window class. */
1210 #define MAP_CURSOR(a,b) \
1212 SetCursor( LoadCursor( NULL, b ) ); \
1215 /* Nuke the cursor AND change it for this window class. */
1216 #define ZAP_CURSOR(a,b) \
1218 SetCursor( NULL ); \
1221 if( LOWORD( lParam ) == HTCLIENT )
1222 switch( window->State.Cursor )
1224 MAP_CURSOR( GLUT_CURSOR_RIGHT_ARROW, IDC_ARROW );
1225 MAP_CURSOR( GLUT_CURSOR_LEFT_ARROW, IDC_ARROW );
1226 MAP_CURSOR( GLUT_CURSOR_INFO, IDC_HELP );
1227 MAP_CURSOR( GLUT_CURSOR_DESTROY, IDC_CROSS );
1228 MAP_CURSOR( GLUT_CURSOR_HELP, IDC_HELP );
1229 MAP_CURSOR( GLUT_CURSOR_CYCLE, IDC_SIZEALL );
1230 MAP_CURSOR( GLUT_CURSOR_SPRAY, IDC_CROSS );
1231 MAP_CURSOR( GLUT_CURSOR_WAIT, IDC_WAIT );
1232 MAP_CURSOR( GLUT_CURSOR_TEXT, IDC_UPARROW );
1233 MAP_CURSOR( GLUT_CURSOR_CROSSHAIR, IDC_CROSS );
1234 /* MAP_CURSOR( GLUT_CURSOR_NONE, IDC_NO ); */
1235 ZAP_CURSOR( GLUT_CURSOR_NONE, NULL );
1238 MAP_CURSOR( GLUT_CURSOR_UP_DOWN, IDC_ARROW );
1241 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1245 window->State.Visible = GL_TRUE;
1246 window->State.Redisplay = GL_TRUE;
1250 /* Turn on the visibility in case it was turned off somehow */
1251 window->State.Visible = GL_TRUE;
1252 BeginPaint( hWnd, &ps );
1253 fghRedrawWindowByHandle( hWnd );
1254 EndPaint( hWnd, &ps );
1258 fgDestroyWindow ( window );
1259 if ( fgState.ActionOnWindowClose != GLUT_ACTION_CONTINUE_EXECUTION )
1265 * The window already got destroyed, so don't bother with it.
1271 window->State.MouseX = LOWORD( lParam );
1272 window->State.MouseY = HIWORD( lParam );
1274 if ( window->ActiveMenu )
1276 window->State.Redisplay = GL_TRUE;
1277 fgSetWindow ( window->ActiveMenu->ParentWindow );
1281 fgState.Modifiers = fgGetWin32Modifiers( );
1283 if( ( wParam & MK_LBUTTON ) ||
1284 ( wParam & MK_MBUTTON ) ||
1285 ( wParam & MK_RBUTTON ) )
1286 INVOKE_WCB( *window, Motion, ( window->State.MouseX,
1287 window->State.MouseY ) );
1289 INVOKE_WCB( *window, Passive, ( window->State.MouseX,
1290 window->State.MouseY ) );
1292 fgState.Modifiers = 0xffffffff;
1296 case WM_LBUTTONDOWN:
1297 case WM_MBUTTONDOWN:
1298 case WM_RBUTTONDOWN:
1303 GLboolean pressed = GL_TRUE;
1306 window->State.MouseX = LOWORD( lParam );
1307 window->State.MouseY = HIWORD( lParam );
1311 case WM_LBUTTONDOWN:
1313 button = GLUT_LEFT_BUTTON;
1315 case WM_MBUTTONDOWN:
1317 button = GLUT_MIDDLE_BUTTON;
1319 case WM_RBUTTONDOWN:
1321 button = GLUT_RIGHT_BUTTON;
1325 button = GLUT_LEFT_BUTTON;
1329 button = GLUT_MIDDLE_BUTTON;
1333 button = GLUT_RIGHT_BUTTON;
1341 if( GetSystemMetrics( SM_SWAPBUTTON ) )
1342 if( button == GLUT_LEFT_BUTTON )
1343 button = GLUT_RIGHT_BUTTON;
1344 else if( button == GLUT_RIGHT_BUTTON )
1345 button = GLUT_LEFT_BUTTON;
1348 return DefWindowProc( hWnd, uMsg, lParam, wParam );
1351 * XXX This comment is duplicated in two other spots.
1352 * XXX Can we centralize it?
1354 * Do not execute the application's mouse callback if a
1355 * menu is hooked to this button.
1356 * In that case an appropriate private call should be generated.
1357 * Near as I can tell, this is the menu behaviour:
1358 * - Down-click the menu button, menu not active: activate
1359 * the menu with its upper left-hand corner at the mouse location.
1360 * - Down-click any button outside the menu, menu active:
1361 * deactivate the menu
1362 * - Down-click any button inside the menu, menu active:
1363 * select the menu entry and deactivate the menu
1364 * - Up-click the menu button, menu not active: nothing happens
1365 * - Up-click the menu button outside the menu, menu active:
1367 * - Up-click the menu button inside the menu, menu active:
1368 * select the menu entry and deactivate the menu
1370 /* Window has an active menu, it absorbs any mouse click */
1371 if( window->ActiveMenu )
1373 /* Outside the menu, deactivate the menu if it's a downclick */
1374 if( ! fgCheckActiveMenu( window, window->ActiveMenu ) )
1377 fgDeactivateMenu( window->ActiveMenu->ParentWindow );
1379 else /* In menu, invoke the callback and deactivate the menu*/
1382 * Save the current window and menu and set the current
1383 * window to the window whose menu this is
1385 SFG_Window *save_window = fgStructure.Window;
1386 SFG_Menu *save_menu = fgStructure.Menu;
1387 SFG_Window *parent_window = window->ActiveMenu->ParentWindow;
1388 fgSetWindow( parent_window );
1389 fgStructure.Menu = window->ActiveMenu;
1391 /* Execute the menu callback */
1392 fgExecuteMenuCallback( window->ActiveMenu );
1393 fgDeactivateMenu( parent_window );
1395 /* Restore the current window and menu */
1396 fgSetWindow( save_window );
1397 fgStructure.Menu = save_menu;
1401 * Let's make the window redraw as a result of the mouse
1402 * click and menu activity.
1404 if( ! window->IsMenu )
1405 window->State.Redisplay = GL_TRUE;
1410 if ( window->Menu[ button ] && pressed )
1412 window->State.Redisplay = GL_TRUE;
1413 fgSetWindow( window );
1414 fgActivateMenu( window, button );
1419 if( ! FETCH_WCB( *window, Mouse ) )
1422 fgSetWindow( window );
1423 fgState.Modifiers = fgGetWin32Modifiers( );
1428 pressed ? GLUT_DOWN : GLUT_UP,
1429 window->State.MouseX,
1430 window->State.MouseY
1434 fgState.Modifiers = 0xffffffff;
1439 /* Should be WM_MOUSEWHEEL but my compiler doesn't recognize it */
1442 * XXX THIS IS SPECULATIVE -- John Fay, 10/2/03
1443 * XXX Should use WHEEL_DELTA instead of 120
1445 int wheel_number = LOWORD( wParam );
1446 short ticks = ( short )HIWORD( wParam ) / 120;
1456 * The mouse cursor has moved. Remember the new mouse cursor's position
1458 /* window->State.MouseX = LOWORD( lParam ); */
1459 /* Need to adjust by window position, */
1460 /* window->State.MouseY = HIWORD( lParam ); */
1461 /* change "lParam" to other parameter */
1463 if( ! FETCH_WCB( *window, MouseWheel ) &&
1464 ! FETCH_WCB( *window, Mouse ) )
1467 fgSetWindow( window );
1468 fgState.Modifiers = fgGetWin32Modifiers( );
1471 if( FETCH_WCB( *window, MouseWheel ) )
1472 INVOKE_WCB( *window, MouseWheel,
1475 window->State.MouseX,
1476 window->State.MouseY
1479 else /* No mouse wheel, call the mouse button callback twice */
1482 * XXX The below assumes that you have no more than 3 mouse
1483 * XXX buttons. Sorry.
1485 int button = wheel_number*2 + 4;
1488 INVOKE_WCB( *window, Mouse,
1489 ( button, GLUT_DOWN,
1490 window->State.MouseX, window->State.MouseY )
1492 INVOKE_WCB( *window, Mouse,
1494 window->State.MouseX, window->State.MouseX )
1498 fgState.Modifiers = 0xffffffff;
1508 if( fgState.IgnoreKeyRepeat && (lParam & KF_REPEAT) )
1512 * Remember the current modifiers state. This is done here in order
1513 * to make sure the VK_DELETE keyboard callback is executed properly.
1515 fgState.Modifiers = fgGetWin32Modifiers( );
1517 GetCursorPos( &mouse_pos );
1518 ScreenToClient( window->Window.Handle, &mouse_pos );
1520 window->State.MouseX = mouse_pos.x;
1521 window->State.MouseY = mouse_pos.y;
1524 * Convert the Win32 keystroke codes to GLUTtish way
1526 # define KEY(a,b) case a: keypress = b; break;
1530 KEY( VK_F1, GLUT_KEY_F1 );
1531 KEY( VK_F2, GLUT_KEY_F2 );
1532 KEY( VK_F3, GLUT_KEY_F3 );
1533 KEY( VK_F4, GLUT_KEY_F4 );
1534 KEY( VK_F5, GLUT_KEY_F5 );
1535 KEY( VK_F6, GLUT_KEY_F6 );
1536 KEY( VK_F7, GLUT_KEY_F7 );
1537 KEY( VK_F8, GLUT_KEY_F8 );
1538 KEY( VK_F9, GLUT_KEY_F9 );
1539 KEY( VK_F10, GLUT_KEY_F10 );
1540 KEY( VK_F11, GLUT_KEY_F11 );
1541 KEY( VK_F12, GLUT_KEY_F12 );
1542 KEY( VK_PRIOR, GLUT_KEY_PAGE_UP );
1543 KEY( VK_NEXT, GLUT_KEY_PAGE_DOWN );
1544 KEY( VK_HOME, GLUT_KEY_HOME );
1545 KEY( VK_END, GLUT_KEY_END );
1546 KEY( VK_LEFT, GLUT_KEY_LEFT );
1547 KEY( VK_UP, GLUT_KEY_UP );
1548 KEY( VK_RIGHT, GLUT_KEY_RIGHT );
1549 KEY( VK_DOWN, GLUT_KEY_DOWN );
1550 KEY( VK_INSERT, GLUT_KEY_INSERT );
1554 * The delete key should be treated as an ASCII keypress:
1556 INVOKE_WCB( *window, Keyboard,
1557 ( 127, window->State.MouseX, window->State.MouseY )
1561 if( keypress != -1 )
1562 INVOKE_WCB( *window, Special,
1564 window->State.MouseX, window->State.MouseY )
1567 fgState.Modifiers = 0xffffffff;
1578 * Remember the current modifiers state. This is done here in order
1579 * to make sure the VK_DELETE keyboard callback is executed properly.
1581 fgState.Modifiers = fgGetWin32Modifiers( );
1583 GetCursorPos( &mouse_pos );
1584 ScreenToClient( window->Window.Handle, &mouse_pos );
1586 window->State.MouseX = mouse_pos.x;
1587 window->State.MouseY = mouse_pos.y;
1590 * Convert the Win32 keystroke codes to GLUTtish way.
1591 * "KEY(a,b)" was defined under "WM_KEYDOWN"
1596 KEY( VK_F1, GLUT_KEY_F1 );
1597 KEY( VK_F2, GLUT_KEY_F2 );
1598 KEY( VK_F3, GLUT_KEY_F3 );
1599 KEY( VK_F4, GLUT_KEY_F4 );
1600 KEY( VK_F5, GLUT_KEY_F5 );
1601 KEY( VK_F6, GLUT_KEY_F6 );
1602 KEY( VK_F7, GLUT_KEY_F7 );
1603 KEY( VK_F8, GLUT_KEY_F8 );
1604 KEY( VK_F9, GLUT_KEY_F9 );
1605 KEY( VK_F10, GLUT_KEY_F10 );
1606 KEY( VK_F11, GLUT_KEY_F11 );
1607 KEY( VK_F12, GLUT_KEY_F12 );
1608 KEY( VK_PRIOR, GLUT_KEY_PAGE_UP );
1609 KEY( VK_NEXT, GLUT_KEY_PAGE_DOWN );
1610 KEY( VK_HOME, GLUT_KEY_HOME );
1611 KEY( VK_END, GLUT_KEY_END );
1612 KEY( VK_LEFT, GLUT_KEY_LEFT );
1613 KEY( VK_UP, GLUT_KEY_UP );
1614 KEY( VK_RIGHT, GLUT_KEY_RIGHT );
1615 KEY( VK_DOWN, GLUT_KEY_DOWN );
1616 KEY( VK_INSERT, GLUT_KEY_INSERT );
1620 * The delete key should be treated as an ASCII keypress:
1622 INVOKE_WCB( *window, KeyboardUp,
1623 ( 127, window->State.MouseX, window->State.MouseY )
1632 GetKeyboardState( state );
1634 if( ToAscii( wParam, 0, state, code, 0 ) == 1 )
1637 INVOKE_WCB( *window, KeyboardUp,
1639 window->State.MouseX, window->State.MouseY )
1644 if( keypress != -1 )
1645 INVOKE_WCB( *window, SpecialUp,
1647 window->State.MouseX, window->State.MouseY )
1650 fgState.Modifiers = 0xffffffff;
1657 if( fgState.IgnoreKeyRepeat && (lParam & KF_REPEAT) )
1660 fgState.Modifiers = fgGetWin32Modifiers( );
1661 INVOKE_WCB( *window, Keyboard,
1663 window->State.MouseX, window->State.MouseY )
1665 fgState.Modifiers = 0xffffffff;
1669 case WM_CAPTURECHANGED:
1670 /* User has finished resizing the window, force a redraw */
1671 INVOKE_WCB( *window, Display, ( ) );
1673 /*lRet = DefWindowProc( hWnd, uMsg, wParam, lParam ); */
1677 * Other messages that I have seen and which are not handled already
1679 case WM_SETTEXT: /* 0x000c */
1680 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1681 /* Pass it on to "DefWindowProc" to set the window text */
1684 case WM_GETTEXT: /* 0x000d */
1685 /* Ideally we would copy the title of the window into "lParam" */
1686 /* strncpy ( (char *)lParam, "Window Title", wParam );
1687 lRet = ( wParam > 12 ) ? 12 : wParam; */
1688 /* the number of characters copied */
1689 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1692 case WM_GETTEXTLENGTH: /* 0x000e */
1693 /* Ideally we would get the length of the title of the window */
1695 /* the number of characters in "Window Title\0" (see above) */
1698 case WM_ERASEBKGND: /* 0x0014 */
1699 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1702 case WM_SYNCPAINT: /* 0x0088 */
1703 /* Another window has moved, need to update this one */
1704 window->State.Redisplay = GL_TRUE;
1705 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1706 /* Help screen says this message must be passed to "DefWindowProc" */
1709 case WM_NCPAINT: /* 0x0085 */
1710 /* Need to update the border of this window */
1711 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1712 /* Pass it on to "DefWindowProc" to repaint a standard border */
1715 case WM_SYSCOMMAND : /* 0x0112 */
1718 * We have received a system command message. Try to act on it.
1719 * The commands are passed in through the "lParam" parameter:
1720 * Clicking on a corner to resize the window gives a "F004" message
1721 * but this is not defined in my header file.
1732 /* User has clicked on the "-" to minimize the window */
1733 /* Turn off the visibility */
1734 window->State.Visible = GL_FALSE ;
1741 case SC_NEXTWINDOW :
1744 case SC_PREVWINDOW :
1748 /* Followed very closely by a WM_CLOSE message */
1772 case SC_SCREENSAVE :
1780 /* We need to pass the message on to the operating system as well */
1781 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1786 * Handle unhandled messages
1788 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1796 /*** END OF FILE ***/