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 * For windowed mode, get the current position of the
94 * window and resize taking the size of the frame
95 * decorations into account.
98 GetWindowRect( window->Window.Handle, &rect );
99 rect.right = rect.left + width;
100 rect.bottom = rect.top + height;
102 if ( window->Parent == NULL )
104 if ( ! window->IsMenu && !window->State.IsGameMode )
106 rect.right += GetSystemMetrics( SM_CXSIZEFRAME ) * 2;
107 rect.bottom += GetSystemMetrics( SM_CYSIZEFRAME ) * 2 +
108 GetSystemMetrics( SM_CYCAPTION );
113 GetWindowRect( window->Parent->Window.Handle, &rect );
114 AdjustWindowRect ( &rect, WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS |
115 WS_CLIPCHILDREN, FALSE );
119 * SWP_NOACTIVATE Do not activate the window
120 * SWP_NOOWNERZORDER Do not change position in z-order
121 * SWP_NOSENDCHANGING Supress WM_WINDOWPOSCHANGING message
122 * SWP_NOZORDER Retains the current Z order (ignore 2nd param)
125 SetWindowPos( window->Window.Handle,
129 rect.right - rect.left,
130 rect.bottom - rect.top,
131 SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOSENDCHANGING |
137 * XXX Should update {window->State.OldWidth, window->State.OldHeight}
138 * XXX to keep in lockstep with UNIX_X11 code.
140 if( FETCH_WCB( *window, Reshape ) )
141 INVOKE_WCB( *window, Reshape, ( width, height ) );
144 fgSetWindow( window );
145 glViewport( 0, 0, width, height );
151 * Force a window redraw. In Windows at least this is only a partial
152 * solution: if the window is increasing in size in either dimension,
153 * the already-drawn part does not get drawn again and things look funny.
154 * But without this we get this bad behaviour whenever we resize the
157 window->State.Redisplay = GL_TRUE;
160 fgSetWindow( current_window );
164 * Calls a window's redraw method. This is used when
165 * a redraw is forced by the incoming window messages.
167 static void fghRedrawWindowByHandle ( SFG_WindowHandleType handle )
169 SFG_Window* window = fgWindowByHandle( handle );
170 freeglut_return_if_fail( window );
171 freeglut_return_if_fail( FETCH_WCB ( *window, Display ) );
173 window->State.Redisplay = GL_FALSE;
175 freeglut_return_if_fail( window->State.Visible );
177 if( window->State.NeedToResize )
179 SFG_Window *current_window = fgStructure.Window;
181 fgSetWindow( window );
183 fghReshapeWindowByHandle(
184 window->Window.Handle,
189 window->State.NeedToResize = GL_FALSE;
190 fgSetWindow( current_window );
193 INVOKE_WCB( *window, Display, ( ) );
197 * A static helper function to execute display callback for a window
199 static void fghcbDisplayWindow( SFG_Window *window,
200 SFG_Enumerator *enumerator )
202 if( window->State.NeedToResize )
204 SFG_Window *current_window = fgStructure.Window;
206 fgSetWindow( window );
208 fghReshapeWindowByHandle(
209 window->Window.Handle,
214 window->State.NeedToResize = GL_FALSE;
215 fgSetWindow ( current_window );
218 if( window->State.Redisplay &&
219 window->State.Visible )
221 window->State.Redisplay = GL_FALSE;
223 #if TARGET_HOST_UNIX_X11
225 SFG_Window *current_window = fgStructure.Window;
227 INVOKE_WCB( *window, Display, ( ) );
228 fgSetWindow( current_window );
230 #elif TARGET_HOST_WIN32
232 window->Window.Handle, NULL, NULL,
233 RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE | RDW_UPDATENOW
238 fgEnumSubWindows( window, fghcbDisplayWindow, enumerator );
242 * Make all windows perform a display call
244 static void fghDisplayAll( void )
246 SFG_Enumerator enumerator;
248 enumerator.found = GL_FALSE;
249 enumerator.data = NULL;
251 fgEnumWindows( fghcbDisplayWindow, &enumerator );
255 * Window enumerator callback to check for the joystick polling code
257 static void fghcbCheckJoystickPolls( SFG_Window *window,
258 SFG_Enumerator *enumerator )
260 long int checkTime = fgElapsedTime( );
262 if( window->State.JoystickLastPoll + window->State.JoystickPollRate <=
265 fgJoystickPollWindow( window );
266 window->State.JoystickLastPoll = checkTime;
269 fgEnumSubWindows( window, fghcbCheckJoystickPolls, enumerator );
273 * Check all windows for joystick polling
275 static void fghCheckJoystickPolls( void )
277 SFG_Enumerator enumerator;
279 enumerator.found = GL_FALSE;
280 enumerator.data = NULL;
282 fgEnumWindows( fghcbCheckJoystickPolls, &enumerator );
286 * Check the global timers
288 static void fghCheckTimers( void )
290 long checkTime = fgElapsedTime( );
292 while( fgState.Timers.First )
294 SFG_Timer *timer = fgState.Timers.First;
296 if( timer->TriggerTime > checkTime )
299 fgListRemove( &fgState.Timers, &timer->Node );
300 fgListAppend( &fgState.FreeTimers, &timer->Node );
302 timer->Callback( timer->ID );
309 long fgElapsedTime( void )
311 if ( fgState.Time.Set )
313 #if TARGET_HOST_UNIX_X11
317 gettimeofday( &now, NULL );
319 elapsed = (now.tv_usec - fgState.Time.Value.tv_usec) / 1000;
320 elapsed += (now.tv_sec - fgState.Time.Value.tv_sec) * 1000;
323 #elif TARGET_HOST_WIN32
324 return timeGetTime() - fgState.Time.Value;
329 #if TARGET_HOST_UNIX_X11
330 gettimeofday( &fgState.Time.Value, NULL );
331 #elif TARGET_HOST_WIN32
332 fgState.Time.Value = timeGetTime ();
334 fgState.Time.Set = GL_TRUE ;
343 void fgError( const char *fmt, ... )
349 fprintf( stderr, "freeglut ");
350 if( fgState.ProgramName )
351 fprintf (stderr, "(%s): ", fgState.ProgramName);
352 vfprintf( stderr, fmt, ap );
353 fprintf( stderr, "\n" );
357 if ( fgState.Initialised )
363 void fgWarning( const char *fmt, ... )
369 fprintf( stderr, "freeglut ");
370 if( fgState.ProgramName )
371 fprintf( stderr, "(%s): ", fgState.ProgramName );
372 vfprintf( stderr, fmt, ap );
373 fprintf( stderr, "\n" );
379 * Indicates whether Joystick events are being used by ANY window.
381 * The current mechanism is to walk all of the windows and ask if
382 * there is a joystick callback. Certainly in some cases, maybe
383 * in all cases, the joystick is attached to the system and accessed
384 * from ONE point by GLUT/freeglut, so this is not the right way,
385 * in general, to do this. However, the Joystick code is segregated
386 * in its own little world, so we can't access the information that
387 * we need in order to do that nicely.
390 * * Store Joystick data into freeglut global state.
391 * * Provide NON-static functions or data from Joystick *.c file.
393 * Basically, the RIGHT way to do this requires knowing something
394 * about the Joystick. Right now, the Joystick code is behind
398 static void fgCheckJoystickCallback( SFG_Window* w, SFG_Enumerator* e)
400 if( FETCH_WCB( *w, Joystick ) )
405 fgEnumSubWindows( w, fgCheckJoystickCallback, e );
407 static int fgHaveJoystick( void )
409 SFG_Enumerator enumerator;
410 enumerator.found = GL_FALSE;
411 enumerator.data = NULL;
412 fgEnumWindows( fgCheckJoystickCallback, &enumerator );
413 return !!enumerator.data;
415 static void fgHavePendingRedisplaysCallback( SFG_Window* w, SFG_Enumerator* e)
417 if( w->State.Redisplay )
422 fgEnumSubWindows( w, fgHavePendingRedisplaysCallback, e );
424 static int fgHavePendingRedisplays (void)
426 SFG_Enumerator enumerator;
427 enumerator.found = GL_FALSE;
428 enumerator.data = NULL;
429 fgEnumWindows( fgHavePendingRedisplaysCallback, &enumerator );
430 return !!enumerator.data;
433 * Returns the number of GLUT ticks (milliseconds) till the next timer event.
435 static long fgNextTimer( void )
438 SFG_Timer *timer = fgState.Timers.First;
441 ret = timer->TriggerTime - fgElapsedTime();
448 * Does the magic required to relinquish the CPU until something interesting
451 static void fgSleepForEvents( void )
455 if( fgState.IdleCallback || fgHavePendingRedisplays( ) )
458 msec = fgNextTimer( );
459 if( fgHaveJoystick( ) ) /* XXX Use GLUT timers for joysticks... */
460 msec = MIN( msec, 10 ); /* XXX Dumb; forces granularity to .01sec */
462 #if TARGET_HOST_UNIX_X11
469 socket = ConnectionNumber( fgDisplay.Display );
471 FD_SET( socket, &fdset );
472 wait.tv_sec = msec / 1000;
473 wait.tv_usec = (msec % 1000) * 1000;
474 err = select( socket+1, &fdset, NULL, NULL, &wait );
477 fgWarning ( "freeglut select() error: %d\n", errno );
479 #elif TARGET_HOST_WIN32
480 MsgWaitForMultipleObjects( 0, NULL, FALSE, msec, QS_ALLEVENTS );
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 * GLUT presumably does this because it generally tries to treat
563 * sub-windows the same as windows.
565 * XXX Technically, GETWINDOW( xconfigure ) and
566 * XXX {event.xconfigure} may not be legit ways to get at
567 * XXX data for CreateNotify events. In practice, the data
568 * XXX is in a union which is laid out much the same either
569 * XXX way. But if you want to split hairs, this isn't legit,
570 * XXX and we should instead duplicate some code.
573 case ConfigureNotify:
574 GETWINDOW( xconfigure );
576 int width = event.xconfigure.width;
577 int height = event.xconfigure.height;
579 if( ( width != window->State.OldWidth ) ||
580 ( height != window->State.OldHeight ) )
582 window->State.OldWidth = width;
583 window->State.OldHeight = height;
584 if( FETCH_WCB( *window, Reshape ) )
585 INVOKE_WCB( *window, Reshape, ( width, height ) );
588 fgSetWindow( window );
589 glViewport( 0, 0, width, height );
591 glutPostRedisplay( );
598 * This is sent to confirm the XDestroyWindow call.
600 * XXX WHY is this commented out? Should we re-enable it?
602 /* fgAddToWindowDestroyList ( window ); */
607 * We are too dumb to process partial exposes...
609 * XXX Well, we could do it. However, it seems to only
610 * XXX be potentially useful for single-buffered (since
611 * XXX double-buffered does not respect viewport when we
612 * XXX do a buffer-swap).
614 * XXX GETWINDOW( xexpose );
615 * XXX fgSetWindow( window );
616 * XXX glutPostRedisplay( );
618 if( event.xexpose.count == 0 )
619 fghRedrawWindowByHandle( event.xexpose.window );
625 * If we never do anything with this, can we just not ask to
626 * get these messages?
632 * Have the client's keyboard knowledge updated (xlib.ps,
633 * page 206, says that's a good thing to do)
635 XRefreshKeyboardMapping( (XMappingEvent *) &event );
638 case VisibilityNotify:
640 GETWINDOW( xvisibility );
642 * XXX INVOKE_WCB() does this check for us.
644 if( ! FETCH_WCB( *window, WindowStatus ) )
646 fgSetWindow( window );
649 * Sending this event, the X server can notify us that the window
650 * has just acquired one of the three possible visibility states:
651 * VisibilityUnobscured, VisibilityPartiallyObscured or
652 * VisibilityFullyObscured
654 switch( event.xvisibility.state )
656 case VisibilityUnobscured:
657 INVOKE_WCB( *window, WindowStatus, ( GLUT_FULLY_RETAINED ) );
658 window->State.Visible = GL_TRUE;
661 case VisibilityPartiallyObscured:
662 INVOKE_WCB( *window, WindowStatus,
663 ( GLUT_PARTIALLY_RETAINED ) );
664 window->State.Visible = GL_TRUE;
667 case VisibilityFullyObscured:
668 INVOKE_WCB( *window, WindowStatus, ( GLUT_FULLY_COVERED ) );
669 window->State.Visible = GL_FALSE;
673 fgWarning( "Uknown X visibility state: %d",
674 event.xvisibility.state );
682 GETWINDOW( xcrossing );
683 GETMOUSE( xcrossing );
684 INVOKE_WCB( *window, Entry, ( ( EnterNotify == event.type ) ?
691 GETWINDOW( xmotion );
694 if( window->ActiveMenu )
696 if( window == window->ActiveMenu->ParentWindow )
698 window->ActiveMenu->Window->State.MouseX =
699 event.xmotion.x_root - window->ActiveMenu->X;
700 window->ActiveMenu->Window->State.MouseY =
701 event.xmotion.y_root - window->ActiveMenu->Y;
703 window->ActiveMenu->Window->State.Redisplay = GL_TRUE ;
704 fgSetWindow( window->ActiveMenu->ParentWindow );
710 * XXX For more than 5 buttons, just check {event.xmotion.state},
711 * XXX rather than a host of bit-masks? Or maybe we need to
712 * XXX track ButtonPress/ButtonRelease events in our own
715 #define BUTTON_MASK \
716 ( Button1Mask | Button2Mask | Button3Mask | Button4Mask | Button5Mask )
717 if ( event.xmotion.state & BUTTON_MASK )
718 INVOKE_WCB( *window, Motion, ( event.xmotion.x,
721 INVOKE_WCB( *window, Passive, ( event.xmotion.x,
729 GLboolean pressed = GL_TRUE;
732 if( event.type == ButtonRelease )
736 * A mouse button has been pressed or released. Traditionally,
737 * break if the window was found within the freeglut structures.
739 GETWINDOW( xbutton );
743 * An X button (at least in XFree86) is numbered from 1.
744 * A GLUT button is numbered from 0.
745 * Old GLUT passed through buttons other than just the first
746 * three, though it only gave symbolic names and official
747 * support to the first three.
749 button = event.xbutton.button - 1;
752 * XXX This comment is replicated in the WIN32 section and
753 * XXX maybe also in the menu code. Can we move the info
754 * XXX to one central place and *reference* it from here?
756 * Do not execute the application's mouse callback if a menu
757 * is hooked to this button. In that case an appropriate
758 * private call should be generated.
759 * Near as I can tell, this is the menu behaviour:
760 * - Down-click the menu button, menu not active: activate
761 * the menu with its upper left-hand corner at the mouse
763 * - Down-click any button outside the menu, menu active:
764 * deactivate the menu
765 * - Down-click any button inside the menu, menu active:
766 * select the menu entry and deactivate the menu
767 * - Up-click the menu button, menu not active: nothing happens
768 * - Up-click the menu button outside the menu, menu active:
770 * - Up-click the menu button inside the menu, menu active:
771 * select the menu entry and deactivate the menu
773 /* Window has an active menu, it absorbs any mouse click */
774 if( window->ActiveMenu )
776 if( window == window->ActiveMenu->ParentWindow )
778 window->ActiveMenu->Window->State.MouseX =
779 event.xbutton.x_root - window->ActiveMenu->X;
780 window->ActiveMenu->Window->State.MouseY =
781 event.xbutton.y_root - window->ActiveMenu->Y;
784 /* In the menu, invoke the callback and deactivate the menu*/
785 if( fgCheckActiveMenu( window->ActiveMenu->Window,
786 window->ActiveMenu ) )
789 * Save the current window and menu and set the current
790 * window to the window whose menu this is
792 SFG_Window *save_window = fgStructure.Window;
793 SFG_Menu *save_menu = fgStructure.Menu;
794 SFG_Window *parent_window =
795 window->ActiveMenu->ParentWindow;
796 fgSetWindow( parent_window );
797 fgStructure.Menu = window->ActiveMenu;
799 /* Execute the menu callback */
800 fgExecuteMenuCallback( window->ActiveMenu );
801 fgDeactivateMenu( parent_window );
803 /* Restore the current window and menu */
804 fgSetWindow( save_window );
805 fgStructure.Menu = save_menu;
809 * Outside the menu, deactivate if it's a downclick
811 * XXX This isn't enough. A downclick outside of
812 * XXX the interior of our freeglut windows should also
813 * XXX deactivate the menu. This is more complicated.
815 fgDeactivateMenu( window->ActiveMenu->ParentWindow );
818 * XXX Why does an active menu require a redisplay at
819 * XXX this point? If this can come out cleanly, then
820 * XXX it probably should do so; if not, a comment should
823 window->State.Redisplay = GL_TRUE;
828 * No active menu, let's check whether we need to activate one.
830 if( ( 0 <= button ) &&
831 ( FREEGLUT_MAX_MENUS > button ) &&
832 ( window->Menu[ button ] ) &&
836 * XXX Posting a requisite Redisplay seems bogus.
838 window->State.Redisplay = GL_TRUE;
839 fgSetWindow( window );
840 fgActivateMenu( window, button );
845 * Check if there is a mouse or mouse wheel callback hooked to the
848 if( ! FETCH_WCB( *window, Mouse ) &&
849 ! FETCH_WCB( *window, MouseWheel ) )
852 fgState.Modifiers = fgGetXModifiers( &event );
855 * Finally execute the mouse or mouse wheel callback
857 * XXX Use a symbolic constant, *not* "4"! ("3, sire!")
859 if( ( button < 3 ) || ( ! FETCH_WCB( *window, MouseWheel ) ) )
860 INVOKE_WCB( *window, Mouse, ( button,
861 pressed ? GLUT_DOWN : GLUT_UP,
868 * Map 4 and 5 to wheel zero; EVEN to +1, ODD to -1
869 * " 6 and 7 " " one; ...
871 * XXX This *should* be behind some variables/macros,
872 * XXX since the order and numbering isn't certain
873 * XXX See XFree86 configuration docs (even back in the
874 * XXX 3.x days, and especially with 4.x).
876 * XXX Note that {button} has already been decremeted
877 * XXX in mapping from X button numbering to GLUT.
879 int wheel_number = (button - 3) / 2;
885 INVOKE_WCB( *window, MouseWheel, ( wheel_number,
893 * Trash the modifiers state
895 fgState.Modifiers = 0xffffffff;
902 FGCBKeyboard keyboard_cb;
903 FGCBSpecial special_cb;
908 if( event.type == KeyPress )
910 keyboard_cb = FETCH_WCB( *window, Keyboard );
911 special_cb = FETCH_WCB( *window, Special );
915 keyboard_cb = FETCH_WCB( *window, KeyboardUp );
916 special_cb = FETCH_WCB( *window, SpecialUp );
920 * Is there a keyboard/special callback hooked for this window?
922 if( keyboard_cb || special_cb )
924 XComposeStatus composeStatus;
925 char asciiCode[ 32 ];
930 * Check for the ASCII/KeySym codes associated with the event:
932 len = XLookupString( &event.xkey, asciiCode, sizeof(asciiCode),
933 &keySym, &composeStatus
937 * GLUT API tells us to have two separate callbacks...
942 * ...one for the ASCII translateable keypresses...
946 fgSetWindow( window );
947 fgState.Modifiers = fgGetXModifiers( &event );
948 keyboard_cb( asciiCode[ 0 ],
949 event.xkey.x, event.xkey.y
951 fgState.Modifiers = 0xffffffff;
959 * ...and one for all the others, which need to be
960 * translated to GLUT_KEY_Xs...
964 case XK_F1: special = GLUT_KEY_F1; break;
965 case XK_F2: special = GLUT_KEY_F2; break;
966 case XK_F3: special = GLUT_KEY_F3; break;
967 case XK_F4: special = GLUT_KEY_F4; break;
968 case XK_F5: special = GLUT_KEY_F5; break;
969 case XK_F6: special = GLUT_KEY_F6; break;
970 case XK_F7: special = GLUT_KEY_F7; break;
971 case XK_F8: special = GLUT_KEY_F8; break;
972 case XK_F9: special = GLUT_KEY_F9; break;
973 case XK_F10: special = GLUT_KEY_F10; break;
974 case XK_F11: special = GLUT_KEY_F11; break;
975 case XK_F12: special = GLUT_KEY_F12; break;
977 case XK_Left: special = GLUT_KEY_LEFT; break;
978 case XK_Right: special = GLUT_KEY_RIGHT; break;
979 case XK_Up: special = GLUT_KEY_UP; break;
980 case XK_Down: special = GLUT_KEY_DOWN; break;
983 case XK_Prior: special = GLUT_KEY_PAGE_UP; break;
985 case XK_Next: special = GLUT_KEY_PAGE_DOWN; break;
987 case XK_Home: special = GLUT_KEY_HOME; break;
989 case XK_End: special = GLUT_KEY_END; break;
991 case XK_Insert: special = GLUT_KEY_INSERT; break;
995 * Execute the callback (if one has been specified),
996 * given that the special code seems to be valid...
998 if( special_cb && (special != -1) )
1000 fgSetWindow( window );
1001 fgState.Modifiers = fgGetXModifiers( &event );
1002 special_cb( special, event.xkey.x, event.xkey.y );
1003 fgState.Modifiers = 0xffffffff;
1010 case ReparentNotify:
1011 break; /* XXX Should disable this event */
1014 fgWarning ("Unknown X event type: %d", event.type);
1019 #elif TARGET_HOST_WIN32
1023 while( PeekMessage( &stMsg, NULL, 0, 0, PM_NOREMOVE ) )
1025 if( GetMessage( &stMsg, NULL, 0, 0 ) == 0 )
1027 if( fgState.ActionOnWindowClose == GLUT_ACTION_EXIT )
1032 fgState.ExecState = GLUT_EXEC_STATE_STOP;
1036 TranslateMessage( &stMsg );
1037 DispatchMessage( &stMsg );
1041 if( fgState.Timers.First )
1043 fghCheckJoystickPolls( );
1050 * Enters the freeglut processing loop.
1051 * Stays until the "ExecState" changes to "GLUT_EXEC_STATE_STOP".
1053 void FGAPIENTRY glutMainLoop( void )
1057 #if TARGET_HOST_WIN32
1058 SFG_Window *window = (SFG_Window *)fgStructure.Windows.First ;
1061 freeglut_assert_ready;
1063 #if TARGET_HOST_WIN32
1065 * Processing before the main loop: If there is a window which is open and
1066 * which has a visibility callback, call it. I know this is an ugly hack,
1067 * but I'm not sure what else to do about it. Ideally we should leave
1068 * something uninitialized in the create window code and initialize it in
1069 * the main loop, and have that initialization create a "WM_ACTIVATE"
1070 * message. Then we would put the visibility callback code in the
1071 * "case WM_ACTIVATE" block below. - John Fay -- 10/24/02
1075 if ( FETCH_WCB( *window, Visibility ) )
1077 SFG_Window *current_window = fgStructure.Window ;
1079 INVOKE_WCB( *window, Visibility, ( window->State.Visible ) );
1080 fgSetWindow( current_window );
1083 window = (SFG_Window *)window->Node.Next ;
1087 fgState.ExecState = GLUT_EXEC_STATE_RUNNING ;
1088 while( fgState.ExecState == GLUT_EXEC_STATE_RUNNING )
1092 glutMainLoopEvent( );
1094 * Step through the list of windows, seeing if there are any
1095 * that are not menus
1097 for( window = ( SFG_Window * )fgStructure.Windows.First;
1099 window = ( SFG_Window * )window->Node.Next )
1100 if ( ! ( window->IsMenu ) )
1104 fgState.ExecState = GLUT_EXEC_STATE_STOP;
1107 if( fgState.IdleCallback )
1108 fgState.IdleCallback( );
1110 fgSleepForEvents( );
1115 * When this loop terminates, destroy the display, state and structure
1116 * of a freeglut session, so that another glutInit() call can happen
1118 * Save the "ActionOnWindowClose" because "fgDeinitialize" resets it.
1120 action = fgState.ActionOnWindowClose;
1122 if( action == GLUT_ACTION_EXIT )
1127 * Leaves the freeglut processing loop.
1129 void FGAPIENTRY glutLeaveMainLoop( void )
1131 fgState.ExecState = GLUT_EXEC_STATE_STOP ;
1135 #if TARGET_HOST_WIN32
1137 * Determine a GLUT modifer mask based on MS-WINDOWS system info.
1139 int fgGetWin32Modifiers (void)
1142 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1143 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1144 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1145 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1146 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1147 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1151 * The window procedure for handling Win32 events
1153 LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam,
1156 SFG_Window* window = fgWindowByHandle( hWnd );
1160 if ( ( window == NULL ) && ( uMsg != WM_CREATE ) )
1161 return DefWindowProc( hWnd, uMsg, wParam, lParam );
1163 /* printf ( "Window %3d message <%04x> %12d %12d\n", window?window->ID:0,
1164 uMsg, wParam, lParam ); */
1169 * The window structure is passed as the creation structure paramter...
1171 window = (SFG_Window *) (((LPCREATESTRUCT) lParam)->lpCreateParams);
1172 assert( window != NULL );
1174 window->Window.Handle = hWnd;
1175 window->Window.Device = GetDC( hWnd );
1176 if( window->IsMenu )
1178 unsigned int current_DisplayMode = fgState.DisplayMode;
1179 fgState.DisplayMode = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH;
1180 fgSetupPixelFormat( window, GL_FALSE, PFD_MAIN_PLANE );
1181 fgState.DisplayMode = current_DisplayMode;
1183 if( fgStructure.MenuContext )
1184 wglMakeCurrent( window->Window.Device,
1185 fgStructure.MenuContext->Context
1189 fgStructure.MenuContext =
1190 (SFG_MenuContext *)malloc( sizeof(SFG_MenuContext) );
1191 fgStructure.MenuContext->Context =
1192 wglCreateContext( window->Window.Device );
1195 /* window->Window.Context = wglGetCurrentContext (); */
1196 window->Window.Context = wglCreateContext( window->Window.Device );
1200 fgSetupPixelFormat( window, GL_FALSE, PFD_MAIN_PLANE );
1202 if( ! fgState.UseCurrentContext )
1203 window->Window.Context =
1204 wglCreateContext( window->Window.Device );
1207 window->Window.Context = wglGetCurrentContext( );
1208 if( ! window->Window.Context )
1209 window->Window.Context =
1210 wglCreateContext( window->Window.Device );
1214 window->State.NeedToResize = GL_TRUE;
1215 window->State.Width = fgState.Size.X;
1216 window->State.Height = fgState.Size.Y;
1218 ReleaseDC( window->Window.Handle, window->Window.Device );
1223 * If the window is visible, then it is the user manually resizing it.
1224 * If it is not, then it is the system sending us a dummy resize with
1225 * zero dimensions on a "glutIconifyWindow" call.
1227 if( window->State.Visible )
1229 window->State.NeedToResize = GL_TRUE;
1230 window->State.Width = LOWORD(lParam);
1231 window->State.Height = HIWORD(lParam);
1237 printf("WM_SETFOCUS: %p\n", window );
1238 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1242 if (LOWORD(wParam) != WA_INACTIVE)
1244 /* glutSetCursor( fgStructure.Window->State.Cursor ); */
1245 printf("WM_ACTIVATE: glutSetCursor( %p, %d)\n", window,
1246 window->State.Cursor );
1247 glutSetCursor( window->State.Cursor );
1250 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1255 * XXX Why not re-use some common code with the glutSetCursor()
1256 * XXX function (or perhaps invoke glutSetCursor())?
1257 * XXX That is, why are we duplicating code, here, from
1258 * XXX glutSetCursor()? The WIN32 code should be able to just
1259 * XXX call glutSetCurdsor() instead of defining two macros
1260 * XXX and implementing a nested case in-line.
1263 /* Set the cursor AND change it for this window class. */
1264 #define MAP_CURSOR(a,b) \
1266 SetCursor( LoadCursor( NULL, b ) ); \
1269 /* Nuke the cursor AND change it for this window class. */
1270 #define ZAP_CURSOR(a,b) \
1272 SetCursor( NULL ); \
1275 if( LOWORD( lParam ) == HTCLIENT )
1276 switch( window->State.Cursor )
1278 MAP_CURSOR( GLUT_CURSOR_RIGHT_ARROW, IDC_ARROW );
1279 MAP_CURSOR( GLUT_CURSOR_LEFT_ARROW, IDC_ARROW );
1280 MAP_CURSOR( GLUT_CURSOR_INFO, IDC_HELP );
1281 MAP_CURSOR( GLUT_CURSOR_DESTROY, IDC_CROSS );
1282 MAP_CURSOR( GLUT_CURSOR_HELP, IDC_HELP );
1283 MAP_CURSOR( GLUT_CURSOR_CYCLE, IDC_SIZEALL );
1284 MAP_CURSOR( GLUT_CURSOR_SPRAY, IDC_CROSS );
1285 MAP_CURSOR( GLUT_CURSOR_WAIT, IDC_WAIT );
1286 MAP_CURSOR( GLUT_CURSOR_TEXT, IDC_UPARROW );
1287 MAP_CURSOR( GLUT_CURSOR_CROSSHAIR, IDC_CROSS );
1288 /* MAP_CURSOR( GLUT_CURSOR_NONE, IDC_NO ); */
1289 ZAP_CURSOR( GLUT_CURSOR_NONE, NULL );
1292 MAP_CURSOR( GLUT_CURSOR_UP_DOWN, IDC_ARROW );
1295 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1299 window->State.Visible = GL_TRUE;
1300 window->State.Redisplay = GL_TRUE;
1304 /* Turn on the visibility in case it was turned off somehow */
1305 window->State.Visible = GL_TRUE;
1306 BeginPaint( hWnd, &ps );
1307 fghRedrawWindowByHandle( hWnd );
1308 EndPaint( hWnd, &ps );
1312 fgDestroyWindow ( window );
1313 if ( fgState.ActionOnWindowClose != GLUT_ACTION_CONTINUE_EXECUTION )
1319 * The window already got destroyed, so don't bother with it.
1325 window->State.MouseX = LOWORD( lParam );
1326 window->State.MouseY = HIWORD( lParam );
1328 if ( window->ActiveMenu )
1330 window->State.Redisplay = GL_TRUE;
1331 fgSetWindow ( window->ActiveMenu->ParentWindow );
1335 fgState.Modifiers = fgGetWin32Modifiers( );
1337 if( ( wParam & MK_LBUTTON ) ||
1338 ( wParam & MK_MBUTTON ) ||
1339 ( wParam & MK_RBUTTON ) )
1340 INVOKE_WCB( *window, Motion, ( window->State.MouseX,
1341 window->State.MouseY ) );
1343 INVOKE_WCB( *window, Passive, ( window->State.MouseX,
1344 window->State.MouseY ) );
1346 fgState.Modifiers = 0xffffffff;
1350 case WM_LBUTTONDOWN:
1351 case WM_MBUTTONDOWN:
1352 case WM_RBUTTONDOWN:
1357 GLboolean pressed = GL_TRUE;
1360 window->State.MouseX = LOWORD( lParam );
1361 window->State.MouseY = HIWORD( lParam );
1365 case WM_LBUTTONDOWN:
1367 button = GLUT_LEFT_BUTTON;
1369 case WM_MBUTTONDOWN:
1371 button = GLUT_MIDDLE_BUTTON;
1373 case WM_RBUTTONDOWN:
1375 button = GLUT_RIGHT_BUTTON;
1379 button = GLUT_LEFT_BUTTON;
1383 button = GLUT_MIDDLE_BUTTON;
1387 button = GLUT_RIGHT_BUTTON;
1395 if( GetSystemMetrics( SM_SWAPBUTTON ) )
1397 if( button == GLUT_LEFT_BUTTON )
1398 button = GLUT_RIGHT_BUTTON;
1400 if( button == GLUT_RIGHT_BUTTON )
1401 button = GLUT_LEFT_BUTTON;
1405 return DefWindowProc( hWnd, uMsg, lParam, wParam );
1408 * XXX This comment is duplicated in two other spots.
1409 * XXX Can we centralize it?
1411 * Do not execute the application's mouse callback if a
1412 * menu is hooked to this button.
1413 * In that case an appropriate private call should be generated.
1414 * Near as I can tell, this is the menu behaviour:
1415 * - Down-click the menu button, menu not active: activate
1416 * the menu with its upper left-hand corner at the mouse location.
1417 * - Down-click any button outside the menu, menu active:
1418 * deactivate the menu
1419 * - Down-click any button inside the menu, menu active:
1420 * select the menu entry and deactivate the menu
1421 * - Up-click the menu button, menu not active: nothing happens
1422 * - Up-click the menu button outside the menu, menu active:
1424 * - Up-click the menu button inside the menu, menu active:
1425 * select the menu entry and deactivate the menu
1427 /* Window has an active menu, it absorbs any mouse click */
1428 if( window->ActiveMenu )
1430 /* Outside the menu, deactivate the menu if it's a downclick */
1431 if( ! fgCheckActiveMenu( window, window->ActiveMenu ) )
1434 fgDeactivateMenu( window->ActiveMenu->ParentWindow );
1436 else /* In menu, invoke the callback and deactivate the menu*/
1439 * Save the current window and menu and set the current
1440 * window to the window whose menu this is
1442 SFG_Window *save_window = fgStructure.Window;
1443 SFG_Menu *save_menu = fgStructure.Menu;
1444 SFG_Window *parent_window = window->ActiveMenu->ParentWindow;
1445 fgSetWindow( parent_window );
1446 fgStructure.Menu = window->ActiveMenu;
1448 /* Execute the menu callback */
1449 fgExecuteMenuCallback( window->ActiveMenu );
1450 fgDeactivateMenu( parent_window );
1452 /* Restore the current window and menu */
1453 fgSetWindow( save_window );
1454 fgStructure.Menu = save_menu;
1458 * Let's make the window redraw as a result of the mouse
1459 * click and menu activity.
1461 if( ! window->IsMenu )
1462 window->State.Redisplay = GL_TRUE;
1467 if( window->Menu[ button ] && pressed )
1469 window->State.Redisplay = GL_TRUE;
1470 fgSetWindow( window );
1471 fgActivateMenu( window, button );
1476 if( ! FETCH_WCB( *window, Mouse ) )
1479 fgSetWindow( window );
1480 fgState.Modifiers = fgGetWin32Modifiers( );
1485 pressed ? GLUT_DOWN : GLUT_UP,
1486 window->State.MouseX,
1487 window->State.MouseY
1491 fgState.Modifiers = 0xffffffff;
1496 /* Should be WM_MOUSEWHEEL but my compiler doesn't recognize it */
1499 * XXX THIS IS SPECULATIVE -- John Fay, 10/2/03
1500 * XXX Should use WHEEL_DELTA instead of 120
1502 int wheel_number = LOWORD( wParam );
1503 short ticks = ( short )HIWORD( wParam ) / 120;
1513 * The mouse cursor has moved. Remember the new mouse cursor's position
1515 /* window->State.MouseX = LOWORD( lParam ); */
1516 /* Need to adjust by window position, */
1517 /* window->State.MouseY = HIWORD( lParam ); */
1518 /* change "lParam" to other parameter */
1520 if( ! FETCH_WCB( *window, MouseWheel ) &&
1521 ! FETCH_WCB( *window, Mouse ) )
1524 fgSetWindow( window );
1525 fgState.Modifiers = fgGetWin32Modifiers( );
1528 if( FETCH_WCB( *window, MouseWheel ) )
1529 INVOKE_WCB( *window, MouseWheel,
1532 window->State.MouseX,
1533 window->State.MouseY
1536 else /* No mouse wheel, call the mouse button callback twice */
1539 * XXX The below assumes that you have no more than 3 mouse
1540 * XXX buttons. Sorry.
1542 int button = wheel_number*2 + 4;
1545 INVOKE_WCB( *window, Mouse,
1546 ( button, GLUT_DOWN,
1547 window->State.MouseX, window->State.MouseY )
1549 INVOKE_WCB( *window, Mouse,
1551 window->State.MouseX, window->State.MouseX )
1555 fgState.Modifiers = 0xffffffff;
1565 if( fgState.IgnoreKeyRepeat && (lParam & KF_REPEAT) )
1569 * Remember the current modifiers state. This is done here in order
1570 * to make sure the VK_DELETE keyboard callback is executed properly.
1572 fgState.Modifiers = fgGetWin32Modifiers( );
1574 GetCursorPos( &mouse_pos );
1575 ScreenToClient( window->Window.Handle, &mouse_pos );
1577 window->State.MouseX = mouse_pos.x;
1578 window->State.MouseY = mouse_pos.y;
1581 * Convert the Win32 keystroke codes to GLUTtish way
1583 # define KEY(a,b) case a: keypress = b; break;
1587 KEY( VK_F1, GLUT_KEY_F1 );
1588 KEY( VK_F2, GLUT_KEY_F2 );
1589 KEY( VK_F3, GLUT_KEY_F3 );
1590 KEY( VK_F4, GLUT_KEY_F4 );
1591 KEY( VK_F5, GLUT_KEY_F5 );
1592 KEY( VK_F6, GLUT_KEY_F6 );
1593 KEY( VK_F7, GLUT_KEY_F7 );
1594 KEY( VK_F8, GLUT_KEY_F8 );
1595 KEY( VK_F9, GLUT_KEY_F9 );
1596 KEY( VK_F10, GLUT_KEY_F10 );
1597 KEY( VK_F11, GLUT_KEY_F11 );
1598 KEY( VK_F12, GLUT_KEY_F12 );
1599 KEY( VK_PRIOR, GLUT_KEY_PAGE_UP );
1600 KEY( VK_NEXT, GLUT_KEY_PAGE_DOWN );
1601 KEY( VK_HOME, GLUT_KEY_HOME );
1602 KEY( VK_END, GLUT_KEY_END );
1603 KEY( VK_LEFT, GLUT_KEY_LEFT );
1604 KEY( VK_UP, GLUT_KEY_UP );
1605 KEY( VK_RIGHT, GLUT_KEY_RIGHT );
1606 KEY( VK_DOWN, GLUT_KEY_DOWN );
1607 KEY( VK_INSERT, GLUT_KEY_INSERT );
1611 * The delete key should be treated as an ASCII keypress:
1613 INVOKE_WCB( *window, Keyboard,
1614 ( 127, window->State.MouseX, window->State.MouseY )
1618 if( keypress != -1 )
1619 INVOKE_WCB( *window, Special,
1621 window->State.MouseX, window->State.MouseY )
1624 fgState.Modifiers = 0xffffffff;
1635 * Remember the current modifiers state. This is done here in order
1636 * to make sure the VK_DELETE keyboard callback is executed properly.
1638 fgState.Modifiers = fgGetWin32Modifiers( );
1640 GetCursorPos( &mouse_pos );
1641 ScreenToClient( window->Window.Handle, &mouse_pos );
1643 window->State.MouseX = mouse_pos.x;
1644 window->State.MouseY = mouse_pos.y;
1647 * Convert the Win32 keystroke codes to GLUTtish way.
1648 * "KEY(a,b)" was defined under "WM_KEYDOWN"
1653 KEY( VK_F1, GLUT_KEY_F1 );
1654 KEY( VK_F2, GLUT_KEY_F2 );
1655 KEY( VK_F3, GLUT_KEY_F3 );
1656 KEY( VK_F4, GLUT_KEY_F4 );
1657 KEY( VK_F5, GLUT_KEY_F5 );
1658 KEY( VK_F6, GLUT_KEY_F6 );
1659 KEY( VK_F7, GLUT_KEY_F7 );
1660 KEY( VK_F8, GLUT_KEY_F8 );
1661 KEY( VK_F9, GLUT_KEY_F9 );
1662 KEY( VK_F10, GLUT_KEY_F10 );
1663 KEY( VK_F11, GLUT_KEY_F11 );
1664 KEY( VK_F12, GLUT_KEY_F12 );
1665 KEY( VK_PRIOR, GLUT_KEY_PAGE_UP );
1666 KEY( VK_NEXT, GLUT_KEY_PAGE_DOWN );
1667 KEY( VK_HOME, GLUT_KEY_HOME );
1668 KEY( VK_END, GLUT_KEY_END );
1669 KEY( VK_LEFT, GLUT_KEY_LEFT );
1670 KEY( VK_UP, GLUT_KEY_UP );
1671 KEY( VK_RIGHT, GLUT_KEY_RIGHT );
1672 KEY( VK_DOWN, GLUT_KEY_DOWN );
1673 KEY( VK_INSERT, GLUT_KEY_INSERT );
1677 * The delete key should be treated as an ASCII keypress:
1679 INVOKE_WCB( *window, KeyboardUp,
1680 ( 127, window->State.MouseX, window->State.MouseY )
1689 GetKeyboardState( state );
1691 if( ToAscii( wParam, 0, state, code, 0 ) == 1 )
1694 INVOKE_WCB( *window, KeyboardUp,
1696 window->State.MouseX, window->State.MouseY )
1701 if( keypress != -1 )
1702 INVOKE_WCB( *window, SpecialUp,
1704 window->State.MouseX, window->State.MouseY )
1707 fgState.Modifiers = 0xffffffff;
1714 if( fgState.IgnoreKeyRepeat && (lParam & KF_REPEAT) )
1717 fgState.Modifiers = fgGetWin32Modifiers( );
1718 INVOKE_WCB( *window, Keyboard,
1720 window->State.MouseX, window->State.MouseY )
1722 fgState.Modifiers = 0xffffffff;
1726 case WM_CAPTURECHANGED:
1727 /* User has finished resizing the window, force a redraw */
1728 INVOKE_WCB( *window, Display, ( ) );
1730 /*lRet = DefWindowProc( hWnd, uMsg, wParam, lParam ); */
1734 * Other messages that I have seen and which are not handled already
1736 case WM_SETTEXT: /* 0x000c */
1737 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1738 /* Pass it on to "DefWindowProc" to set the window text */
1741 case WM_GETTEXT: /* 0x000d */
1742 /* Ideally we would copy the title of the window into "lParam" */
1743 /* strncpy ( (char *)lParam, "Window Title", wParam );
1744 lRet = ( wParam > 12 ) ? 12 : wParam; */
1745 /* the number of characters copied */
1746 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1749 case WM_GETTEXTLENGTH: /* 0x000e */
1750 /* Ideally we would get the length of the title of the window */
1752 /* the number of characters in "Window Title\0" (see above) */
1755 case WM_ERASEBKGND: /* 0x0014 */
1756 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1759 case WM_SYNCPAINT: /* 0x0088 */
1760 /* Another window has moved, need to update this one */
1761 window->State.Redisplay = GL_TRUE;
1762 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1763 /* Help screen says this message must be passed to "DefWindowProc" */
1766 case WM_NCPAINT: /* 0x0085 */
1767 /* Need to update the border of this window */
1768 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1769 /* Pass it on to "DefWindowProc" to repaint a standard border */
1772 case WM_SYSCOMMAND : /* 0x0112 */
1775 * We have received a system command message. Try to act on it.
1776 * The commands are passed in through the "lParam" parameter:
1777 * Clicking on a corner to resize the window gives a "F004" message
1778 * but this is not defined in my header file.
1789 /* User has clicked on the "-" to minimize the window */
1790 /* Turn off the visibility */
1791 window->State.Visible = GL_FALSE ;
1798 case SC_NEXTWINDOW :
1801 case SC_PREVWINDOW :
1805 /* Followed very closely by a WM_CLOSE message */
1829 case SC_SCREENSAVE :
1837 /* We need to pass the message on to the operating system as well */
1838 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1843 * Handle unhandled messages
1845 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1853 /*** END OF FILE ***/