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 #define G_LOG_DOMAIN "freeglut-main"
34 #include "../include/GL/freeglut.h"
35 #include "freeglut_internal.h"
38 #if TARGET_HOST_UNIX_X11
39 #include <sys/types.h>
44 #elif TARGET_HOST_WIN32
48 #define MAX(a,b) (((a)>(b)) ? (a) : (b))
52 #define MIN(a,b) (((a)<(b)) ? (a) : (b))
57 * TODO BEFORE THE STABLE RELEASE:
59 * There are some issues concerning window redrawing under X11, and maybe
60 * some events are not handled. The Win32 version lacks some more features,
61 * but seems acceptable for not demanding purposes.
63 * Need to investigate why the X11 version breaks out with an error when
64 * closing a window (using the window manager, not glutDestroyWindow)...
67 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
70 * Calls a window's redraw method. This is used when
71 * a redraw is forced by the incoming window messages.
73 * XXX We can/should make a "unified" window handle type so that
74 * XXX the function headers don't need this silly #ifdef junk.
75 * XXX Make the type, say, {fgWindow}. On UNIX_X11, this is
76 * XXX {Window}. On WIN32, it is {HWND}. Then do the #ifdef
77 * XXX junk *once* in "freeglut_internal.h".
79 static void fghRedrawWindowByHandle
80 #if TARGET_HOST_UNIX_X11
82 #elif TARGET_HOST_WIN32
86 SFG_Window* window = fgWindowByHandle( handle );
87 freeglut_return_if_fail( window != NULL );
88 freeglut_return_if_fail( window->Callbacks.Display != NULL );
89 freeglut_return_if_fail( window->State.Visible == TRUE );
91 fgSetWindow( window );
92 window->State.Redisplay = FALSE;
93 window->Callbacks.Display();
97 * Handle a window configuration change. When no reshape
98 * callback is hooked, the viewport size is updated to
99 * match the new window size.
101 static void fghReshapeWindowByHandle
102 #if TARGET_HOST_UNIX_X11
103 ( Window handle, int width, int height )
104 #elif TARGET_HOST_WIN32
105 ( HWND handle, int width, int height )
108 SFG_Window *current_window = fgStructure.Window ;
110 SFG_Window* window = fgWindowByHandle( handle );
111 freeglut_return_if_fail( window != NULL );
113 fgSetWindow( window );
114 if( window->Callbacks.Reshape != NULL )
115 window->Callbacks.Reshape( width, height );
117 glViewport( 0, 0, width, height );
120 * Force a window redraw. In Windows at least this is only a partial
121 * solution: if the window is increasing in size in either dimension,
122 * the already-drawn part does not get drawn again and things look funny.
123 * But without this we get this bad behaviour whenever we resize the
126 window->State.Redisplay = TRUE ;
129 fgSetWindow( current_window ) ;
133 * A static helper function to execute display callback for a window
135 static void fghcbDisplayWindow( SFG_Window *window, SFG_Enumerator *enumerator )
137 #if TARGET_HOST_UNIX_X11
138 if( (window->Callbacks.Display != NULL) &&
139 (window->State.Redisplay == TRUE) &&
140 (window->State.Visible == TRUE) )
142 SFG_Window *current_window = fgStructure.Window ;
144 fgSetWindow( window );
145 window->State.Redisplay = FALSE;
146 window->Callbacks.Display();
147 fgSetWindow( current_window ) ;
150 #elif TARGET_HOST_WIN32
152 if( window->State.NeedToResize )
154 SFG_Window *current_window = fgStructure.Window ;
156 fgSetWindow( window );
158 fghReshapeWindowByHandle(
159 window->Window.Handle,
160 glutGet( GLUT_WINDOW_WIDTH ),
161 glutGet( GLUT_WINDOW_HEIGHT )
164 window->State.NeedToResize = FALSE;
165 fgSetWindow ( current_window ) ;
168 if( (window->Callbacks.Display != NULL) &&
169 (window->State.Redisplay == TRUE) &&
170 (window->State.Visible == TRUE) )
172 window->State.Redisplay = FALSE;
175 window->Window.Handle, NULL, NULL,
176 RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE | RDW_UPDATENOW
182 fgEnumSubWindows( window, fghcbDisplayWindow, enumerator );
186 * Make all windows perform a display call
188 static void fghDisplayAll( void )
190 SFG_Enumerator enumerator;
192 enumerator.found = FALSE;
193 enumerator.data = NULL;
195 fgEnumWindows( fghcbDisplayWindow, &enumerator );
199 * Window enumerator callback to check for the joystick polling code
201 static void fghcbCheckJoystickPolls( SFG_Window *window,
202 SFG_Enumerator *enumerator )
204 long int checkTime = fgElapsedTime();
206 if( window->State.JoystickLastPoll + window->State.JoystickPollRate <=
209 fgJoystickPollWindow( window );
210 window->State.JoystickLastPoll = checkTime;
213 fgEnumSubWindows( window, fghcbCheckJoystickPolls, enumerator );
217 * Check all windows for joystick polling
219 static void fghCheckJoystickPolls( void )
221 SFG_Enumerator enumerator;
223 enumerator.found = FALSE;
224 enumerator.data = NULL;
226 fgEnumWindows( fghcbCheckJoystickPolls, &enumerator );
230 * Check the global timers
232 static void fghCheckTimers( void )
234 long checkTime = fgElapsedTime();
235 SFG_Timer *timer, *next;
238 fgListInit(&timedOut);
240 for( timer = (SFG_Timer *)fgState.Timers.First;
242 timer = (SFG_Timer *)next )
244 next = (SFG_Timer *)timer->Node.Next;
246 if( timer->TriggerTime <= checkTime )
248 fgListRemove( &fgState.Timers, &timer->Node );
249 fgListAppend( &timedOut, &timer->Node );
254 * Now feel free to execute all the hooked and timed out timer callbacks
255 * And delete the timed out timers...
257 while ( (timer = (SFG_Timer *)timedOut.First) )
259 if( timer->Callback != NULL )
260 timer->Callback( timer->ID );
261 fgListRemove( &timedOut, &timer->Node );
270 long fgElapsedTime( void )
272 #if TARGET_HOST_UNIX_X11
276 gettimeofday( &now, NULL );
278 elapsed = (now.tv_usec - fgState.Time.Value.tv_usec) / 1000;
279 elapsed += (now.tv_sec - fgState.Time.Value.tv_sec) * 1000;
282 #elif TARGET_HOST_WIN32
283 return (timeGetTime() - fgState.Time.Value);
290 void fgError( const char *fmt, ... )
296 fprintf( stderr, "freeglut ");
297 if( fgState.ProgramName )
298 fprintf (stderr, "(%s): ", fgState.ProgramName);
299 vfprintf( stderr, fmt, ap );
300 fprintf( stderr, "\n" );
307 void fgWarning( const char *fmt, ... )
313 fprintf( stderr, "freeglut ");
314 if( fgState.ProgramName )
315 fprintf( stderr, "(%s): ", fgState.ProgramName );
316 vfprintf( stderr, fmt, ap );
317 fprintf( stderr, "\n" );
323 * Indicates whether Joystick events are being used by ANY window.
325 * The current mechanism is to walk all of the windows and ask if
326 * there is a joystick callback. Certainly in some cases, maybe
327 * in all cases, the joystick is attached to the system and accessed
328 * from ONE point by GLUT/freeglut, so this is not the right way,
329 * in general, to do this. However, the Joystick code is segregated
330 * in its own little world, so we can't access the information that
331 * we need in order to do that nicely.
334 * * Store Joystick data into freeglut global state.
335 * * Provide NON-static functions or data from Joystick *.c file.
337 * Basically, the RIGHT way to do this requires knowing something
338 * about the Joystick. Right now, the Joystick code is behind
342 static void fgCheckJoystickCallback( SFG_Window* w, SFG_Enumerator* e)
344 if( w->Callbacks.Joystick )
349 fgEnumSubWindows( w, fgCheckJoystickCallback, e );
351 static int fgHaveJoystick( void )
353 SFG_Enumerator enumerator;
354 enumerator.found = FALSE;
355 enumerator.data = NULL;
356 fgEnumWindows( fgCheckJoystickCallback, &enumerator );
357 return !!enumerator.data;
359 static void fgHavePendingRedisplaysCallback( SFG_Window* w, SFG_Enumerator* e)
361 if( w->State.Redisplay )
366 fgEnumSubWindows( w, fgHavePendingRedisplaysCallback, e );
368 static int fgHavePendingRedisplays (void)
370 SFG_Enumerator enumerator;
371 enumerator.found = FALSE;
372 enumerator.data = NULL;
373 fgEnumWindows( fgHavePendingRedisplaysCallback, &enumerator );
374 return !!enumerator.data;
377 * Indicates whether there are any outstanding timers.
379 static int fgHaveTimers( void )
381 return !!fgState.Timers.First;
384 * Returns the number of GLUT ticks (milliseconds) till the next timer event.
386 static long fgNextTimer( void )
388 long now = fgElapsedTime();
392 for( timer = (SFG_Timer *)fgState.Timers.First;
394 timer = (SFG_Timer *)timer->Node.Next )
395 ret = MIN( ret, MAX( 0, (timer->TriggerTime) - now ) );
400 * Does the magic required to relinquish the CPU until something interesting
403 static void fgSleepForEvents( void )
405 #if TARGET_HOST_UNIX_X11
412 if( fgState.IdleCallback ||
413 fgHavePendingRedisplays() )
415 socket = ConnectionNumber( fgDisplay.Display );
417 FD_SET( socket, &fdset );
419 msec = fgNextTimer();
420 if( fgHaveJoystick() )
421 msec = MIN( msec, 10 );
423 wait.tv_sec = msec / 1000;
424 wait.tv_usec = (msec % 1000) * 1000;
425 err = select( socket+1, &fdset, NULL, NULL, &wait );
428 printf( "freeglut select() error: %d\n", errno );
430 #elif TARGET_HOST_WIN32
434 #if TARGET_HOST_UNIX_X11
436 * Returns GLUT modifier mask for an XEvent.
438 int fgGetXModifiers(XEvent *event)
442 if( event->xkey.state & ( ShiftMask | LockMask ) )
443 ret |= GLUT_ACTIVE_SHIFT;
444 if( event->xkey.state & ControlMask )
445 ret |= GLUT_ACTIVE_CTRL;
446 if( event->xkey.state & Mod1Mask )
447 ret |= GLUT_ACTIVE_ALT;
454 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
457 * Executes a single iteration in the freeglut processing loop.
459 void FGAPIENTRY glutMainLoopEvent( void )
461 #if TARGET_HOST_UNIX_X11
466 * This code was repeated constantly, so here it goes into a definition:
468 #define GETWINDOW(a) \
469 window = fgWindowByHandle( event.a.window ); \
470 if( window == NULL ) \
473 #define GETMOUSE(a) \
474 window->State.MouseX = event.a.x; \
475 window->State.MouseY = event.a.y;
477 freeglut_assert_ready;
479 while( XPending( fgDisplay.Display ) )
481 XNextEvent( fgDisplay.Display, &event );
487 * This is sent to confirm the XDestroyWindow call.
488 * XXX WHY is this commented out? Should we re-enable it?
490 /* fgAddToWindowDestroyList ( window, FALSE ); */
495 * Destroy the window when the WM_DELETE_WINDOW message arrives
497 if( (Atom) event.xclient.data.l[ 0 ] == fgDisplay.DeleteWindow )
499 GETWINDOW( xclient );
501 fgCloseWindow ( window ) ;
502 fgAddToWindowDestroyList ( window, FALSE );
509 * If we never do anything with this, can we just not ask to
510 * get these messages?
516 * We are too dumb to process partial exposes...
517 * XXX Well, we could do it. However, it seems to only
518 * XXX be potentially useful for single-buffered (since
519 * XXX double-buffered does not respect viewport when we
520 * XXX do a buffer-swap).
522 if( event.xexpose.count == 0 )
523 fghRedrawWindowByHandle( event.xexpose.window );
527 * CreateNotify causes a configure-event so that sub-windows are
528 * handled compatibly with GLUT. Otherwise, your sub-windows
529 * (in freeglut only) will not get an initial reshape event,
530 * which can break things.
532 * XXX NOTE that it is possible that you will more than one Reshape
533 * XXX event for your top-level window, but something like this
534 * XXX appears to be required for compatbility.
536 * GLUT presumably does this because it generally tries to treat
537 * sub-windows the same as windows.
540 case ConfigureNotify:
541 fghReshapeWindowByHandle(
542 event.xconfigure.window,
543 event.xconfigure.width,
544 event.xconfigure.height
550 * Have the client's keyboard knowledge updated (xlib.ps,
551 * page 206, says that's a good thing to do)
553 XRefreshKeyboardMapping( (XMappingEvent *) &event );
556 case VisibilityNotify:
558 GETWINDOW( xvisibility );
559 if( window->Callbacks.WindowStatus == NULL )
561 fgSetWindow( window );
564 * Sending this event, the X server can notify us that the window
565 * has just acquired one of the three possible visibility states:
566 * VisibilityUnobscured, VisibilityPartiallyObscured or
567 * VisibilityFullyObscured
569 switch( event.xvisibility.state )
571 case VisibilityUnobscured:
572 window->Callbacks.WindowStatus( GLUT_FULLY_RETAINED );
573 window->State.Visible = TRUE;
576 case VisibilityPartiallyObscured:
577 window->Callbacks.WindowStatus( GLUT_PARTIALLY_RETAINED );
578 window->State.Visible = TRUE;
581 case VisibilityFullyObscured:
582 window->Callbacks.WindowStatus( GLUT_FULLY_COVERED );
583 window->State.Visible = FALSE;
587 fgWarning( "Uknown X visibility state: %d",
588 event.xvisibility.state );
596 GETWINDOW( xcrossing );
597 GETMOUSE( xcrossing );
598 if( window->Callbacks.Entry )
600 fgSetWindow( window ) ;
601 window->Callbacks.Entry( GLUT_ENTERED );
608 GETWINDOW( xcrossing );
609 GETMOUSE( xcrossing );
610 if( window->Callbacks.Entry )
612 fgSetWindow( window ) ;
613 window->Callbacks.Entry( GLUT_LEFT );
620 GETWINDOW( xmotion );
623 if( window->ActiveMenu )
625 if( window == window->ActiveMenu->ParentWindow )
627 window->ActiveMenu->Window->State.MouseX =
628 event.xmotion.x_root - window->ActiveMenu->X;
629 window->ActiveMenu->Window->State.MouseY =
630 event.xmotion.y_root - window->ActiveMenu->Y;
632 window->ActiveMenu->Window->State.Redisplay = TRUE ;
633 fgSetWindow( window->ActiveMenu->ParentWindow ) ;
639 * XXX For more than 5 buttons, just check {event.xmotion.state},
640 * XXX rather than a host of bit-masks?
642 if( (event.xmotion.state & Button1Mask) ||
643 (event.xmotion.state & Button2Mask) ||
644 (event.xmotion.state & Button3Mask) ||
645 (event.xmotion.state & Button4Mask) ||
646 (event.xmotion.state & Button5Mask) )
649 * A mouse button was pressed during the movement...
650 * Is there a motion callback hooked to the window?
652 if( window->Callbacks.Motion )
654 fgSetWindow ( window ) ;
655 window->Callbacks.Motion( event.xmotion.x,
659 else if( window->Callbacks.Passive )
661 fgSetWindow ( window ) ;
662 window->Callbacks.Passive( event.xmotion.x, event.xmotion.y );
670 GLboolean pressed = TRUE;
673 if( event.type == ButtonRelease )
677 * A mouse button has been pressed or released. Traditionally,
678 * break if the window was found within the freeglut structures.
680 GETWINDOW( xbutton );
684 * An X button (at least in XFree86) is numbered from 1.
685 * A GLUT button is numbered from 0.
686 * Old GLUT passed through buttons other than just the first
687 * three, though it only gave symbolic names and official
688 * support to the first three.
690 button = event.xbutton.button - 1;
693 * Do not execute the application's mouse callback if a menu
694 * is hooked to this button. In that case an appropriate
695 * private call should be generated.
696 * Near as I can tell, this is the menu behaviour:
697 * - Down-click the menu button, menu not active: activate
698 * the menu with its upper left-hand corner at the mouse
700 * - Down-click any button outside the menu, menu active:
701 * deactivate the menu
702 * - Down-click any button inside the menu, menu active:
703 * select the menu entry and deactivate the menu
704 * - Up-click the menu button, menu not active: nothing happens
705 * - Up-click the menu button outside the menu, menu active:
707 * - Up-click the menu button inside the menu, menu active:
708 * select the menu entry and deactivate the menu
710 /* Window has an active menu, it absorbs any mouse click */
711 if( window->ActiveMenu )
713 if( window == window->ActiveMenu->ParentWindow )
715 window->ActiveMenu->Window->State.MouseX =
716 event.xbutton.x_root - window->ActiveMenu->X;
717 window->ActiveMenu->Window->State.MouseY =
718 event.xbutton.y_root - window->ActiveMenu->Y;
721 /* In the menu, invoke the callback and deactivate the menu*/
722 if( fgCheckActiveMenu( window->ActiveMenu->Window,
723 window->ActiveMenu ) == TRUE )
726 * Save the current window and menu and set the current
727 * window to the window whose menu this is
729 SFG_Window *save_window = fgStructure.Window;
730 SFG_Menu *save_menu = fgStructure.Menu;
731 SFG_Window *parent_window =
732 window->ActiveMenu->ParentWindow;
733 fgSetWindow( parent_window );
734 fgStructure.Menu = window->ActiveMenu;
736 /* Execute the menu callback */
737 fgExecuteMenuCallback( window->ActiveMenu );
738 fgDeactivateMenu( parent_window );
740 /* Restore the current window and menu */
741 fgSetWindow( save_window );
742 fgStructure.Menu = save_menu;
746 * Outside the menu, deactivate if it's a downclick
747 * XXX This isn't enough. A downclick outside of
748 * XXX the interior of our freeglut windows should also
749 * XXX deactivate the menu. This is more complicated.
751 fgDeactivateMenu( window->ActiveMenu->ParentWindow );
753 window->State.Redisplay = TRUE;
758 * No active menu, let's check whether we need to activate one.
760 if( ( 0 <= button ) &&
762 ( window->Menu[ button ] ) &&
765 window->State.Redisplay = TRUE;
766 fgSetWindow( window );
767 fgActivateMenu( window, button );
772 * Check if there is a mouse or mouse wheel callback hooked to the
775 if( ( window->Callbacks.Mouse == NULL ) &&
776 ( window->Callbacks.MouseWheel == NULL ) )
779 fgSetWindow( window );
782 * XXX Why don't we use {window}? Other code here does...
784 fgStructure.Window->State.Modifiers = fgGetXModifiers( &event );
787 * Finally execute the mouse or mouse wheel callback
789 * XXX Use a symbolic constant, *not* "4"!
791 if( ( button < 4 ) || ( !( window->Callbacks.MouseWheel ) ) )
793 if( window->Callbacks.Mouse )
794 fgStructure.Window->Callbacks.Mouse(
796 event.type == ButtonPress ? GLUT_DOWN : GLUT_UP,
803 if( ( button >= 4 ) && window->Callbacks.MouseWheel )
806 * Map 4 and 5 to wheel zero; EVEN to +1, ODD to -1
807 * " 6 and 7 " " one; ...
809 * XXX This *should* be behind some variables/macros,
810 * XXX since the order and numbering isn't certain
811 * XXX See XFree86 configuration docs (even back in the
812 * XXX 3.x days, and especially with 4.x).
814 int wheel_number = (button - 4) / 2;
815 int direction = (button & 1)*2 - 1;
818 fgStructure.Window->Callbacks.MouseWheel(
828 * Trash the modifiers state
830 fgStructure.Window->State.Modifiers = 0xffffffff;
837 FGCBkeyboard keyboard_cb;
838 FGCBspecial special_cb;
843 if( event.type == KeyPress )
845 keyboard_cb = window->Callbacks.Keyboard;
846 special_cb = window->Callbacks.Special;
850 keyboard_cb = window->Callbacks.KeyboardUp;
851 special_cb = window->Callbacks.SpecialUp;
855 * Is there a keyboard/special callback hooked for this window?
857 if( keyboard_cb || special_cb )
859 XComposeStatus composeStatus;
860 char asciiCode[ 32 ];
865 * Check for the ASCII/KeySym codes associated with the event:
867 len = XLookupString( &event.xkey, asciiCode, sizeof(asciiCode),
868 &keySym, &composeStatus );
871 * GLUT API tells us to have two separate callbacks...
876 * ...one for the ASCII translateable keypresses...
880 fgSetWindow( window );
881 window->State.Modifiers = fgGetXModifiers( &event );
882 keyboard_cb( asciiCode[ 0 ],
883 event.xkey.x, event.xkey.y );
884 window->State.Modifiers = 0xffffffff;
892 * ...and one for all the others, which need to be
893 * translated to GLUT_KEY_Xs...
897 case XK_F1: special = GLUT_KEY_F1; break;
898 case XK_F2: special = GLUT_KEY_F2; break;
899 case XK_F3: special = GLUT_KEY_F3; break;
900 case XK_F4: special = GLUT_KEY_F4; break;
901 case XK_F5: special = GLUT_KEY_F5; break;
902 case XK_F6: special = GLUT_KEY_F6; break;
903 case XK_F7: special = GLUT_KEY_F7; break;
904 case XK_F8: special = GLUT_KEY_F8; break;
905 case XK_F9: special = GLUT_KEY_F9; break;
906 case XK_F10: special = GLUT_KEY_F10; break;
907 case XK_F11: special = GLUT_KEY_F11; break;
908 case XK_F12: special = GLUT_KEY_F12; break;
910 case XK_Left: special = GLUT_KEY_LEFT; break;
911 case XK_Right: special = GLUT_KEY_RIGHT; break;
912 case XK_Up: special = GLUT_KEY_UP; break;
913 case XK_Down: special = GLUT_KEY_DOWN; break;
916 case XK_Prior: special = GLUT_KEY_PAGE_UP; break;
918 case XK_Next: special = GLUT_KEY_PAGE_DOWN; break;
920 case XK_Home: special = GLUT_KEY_HOME; break;
922 case XK_End: special = GLUT_KEY_END; break;
924 case XK_Insert: special = GLUT_KEY_INSERT; break;
928 * Execute the callback (if one has been specified),
929 * given that the special code seems to be valid...
931 if( special_cb && (special != -1) )
933 fgSetWindow( window );
934 window->State.Modifiers = fgGetXModifiers( &event );
935 special_cb( special, event.xkey.x, event.xkey.y );
936 window->State.Modifiers = 0xffffffff;
944 fgWarning ("Unknown X event type: %d", event.type);
949 #elif TARGET_HOST_WIN32
953 while( PeekMessage( &stMsg, NULL, 0, 0, PM_NOREMOVE ) )
955 if( GetMessage( &stMsg, NULL, 0, 0 ) == 0 )
956 fgState.ExecState = GLUT_EXEC_STATE_STOP ;
958 TranslateMessage( &stMsg );
959 DispatchMessage( &stMsg );
964 fghCheckJoystickPolls( );
971 * Enters the freeglut processing loop.
972 * Stays until the "ExecState" changes to "GLUT_EXEC_STATE_STOP".
974 void FGAPIENTRY glutMainLoop( void )
976 #if TARGET_HOST_WIN32
977 SFG_Window *window = (SFG_Window *)fgStructure.Windows.First ;
980 freeglut_assert_ready;
982 #if TARGET_HOST_WIN32
984 * Processing before the main loop: If there is a window which is open and
985 * which has a visibility callback, call it. I know this is an ugly hack,
986 * but I'm not sure what else to do about it. Ideally we should leave
987 * something uninitialized in the create window code and initialize it in
988 * the main loop, and have that initialization create a "WM_ACTIVATE"
989 * message. Then we would put the visibility callback code in the
990 * "case WM_ACTIVATE" block below. - John Fay -- 10/24/02
994 if ( window->Callbacks.Visibility )
996 SFG_Window *current_window = fgStructure.Window ;
998 fgSetWindow( window );
999 window->Callbacks.Visibility ( window->State.Visible ) ;
1000 fgSetWindow( current_window );
1003 window = (SFG_Window *)window->Node.Next ;
1007 fgState.ExecState = GLUT_EXEC_STATE_RUNNING ;
1008 while( fgState.ExecState == GLUT_EXEC_STATE_RUNNING )
1010 glutMainLoopEvent( );
1012 if( fgStructure.Windows.First == NULL )
1013 fgState.ExecState = GLUT_EXEC_STATE_STOP;
1016 if( fgState.IdleCallback )
1017 fgState.IdleCallback( );
1024 fgExecutionState execState = fgState.ActionOnWindowClose;
1027 * When this loop terminates, destroy the display, state and structure
1028 * of a freeglut session, so that another glutInit() call can happen
1032 if( execState == GLUT_ACTION_EXIT )
1038 * Leaves the freeglut processing loop.
1040 void FGAPIENTRY glutLeaveMainLoop( void )
1042 fgState.ExecState = GLUT_EXEC_STATE_STOP ;
1046 * The window procedure for handling Win32 events
1048 #if TARGET_HOST_WIN32
1049 LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam,
1052 SFG_Window* window = fgWindowByHandle( hWnd );
1056 if ( ( window == NULL ) && ( uMsg != WM_CREATE ) )
1057 return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
1059 /* printf ( "Window %3d message <%04x> %12d %12d\n", window?window->ID:0,
1060 uMsg, wParam, lParam ); */
1065 * The window structure is passed as the creation structure paramter...
1067 window = (SFG_Window *) (((LPCREATESTRUCT) lParam)->lpCreateParams);
1068 assert( window != NULL );
1070 window->Window.Handle = hWnd;
1071 window->Window.Device = GetDC( hWnd );
1072 if( fgState.BuildingAMenu )
1074 unsigned int current_DisplayMode = fgState.DisplayMode;
1075 fgState.DisplayMode = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH;
1076 fgSetupPixelFormat( window, FALSE, PFD_MAIN_PLANE );
1077 fgState.DisplayMode = current_DisplayMode;
1079 if( fgStructure.MenuContext )
1080 wglMakeCurrent( window->Window.Device,
1081 fgStructure.MenuContext->Context ) ;
1084 fgStructure.MenuContext =
1085 (SFG_MenuContext *)malloc( sizeof(SFG_MenuContext) );
1086 fgStructure.MenuContext->Context =
1087 wglCreateContext( window->Window.Device );
1090 /* window->Window.Context = wglGetCurrentContext () ; */
1091 window->Window.Context = wglCreateContext( window->Window.Device );
1095 fgSetupPixelFormat( window, FALSE, PFD_MAIN_PLANE );
1097 if( fgState.UseCurrentContext != TRUE )
1098 window->Window.Context =
1099 wglCreateContext( window->Window.Device );
1102 window->Window.Context = wglGetCurrentContext( );
1103 if( ! window->Window.Context )
1104 window->Window.Context =
1105 wglCreateContext( window->Window.Device );
1109 window->State.NeedToResize = TRUE;
1110 ReleaseDC( window->Window.Handle, window->Window.Device );
1115 * We got resized... But check if the window has been already added...
1117 fghReshapeWindowByHandle( hWnd, LOWORD(lParam), HIWORD(lParam) );
1121 printf("WM_SETFOCUS: %p\n", window );
1122 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1126 if (LOWORD(wParam) != WA_INACTIVE)
1128 /* glutSetCursor( fgStructure.Window->State.Cursor ); */
1129 printf("WM_ACTIVATE: glutSetCursor( %p, %d)\n", window,
1130 window->State.Cursor );
1132 glutSetCursor( window->State.Cursor );
1135 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1141 * Windows seems to need reminding to erase the cursor for NONE.
1144 if ((LOWORD(lParam) == HTCLIENT) &&
1145 (fgStructure.Window->State.Cursor == GLUT_CURSOR_NONE))
1148 /* Set the cursor AND change it for this window class. */
1149 # define MAP_CURSOR(a,b) case a: SetCursor( LoadCursor( NULL, b ) ); \
1151 /* Nuke the cursor AND change it for this window class. */
1152 # define ZAP_CURSOR(a,b) case a: SetCursor( NULL ); \
1155 if( LOWORD( lParam ) == HTCLIENT )
1156 switch( window->State.Cursor )
1158 MAP_CURSOR( GLUT_CURSOR_RIGHT_ARROW, IDC_ARROW );
1159 MAP_CURSOR( GLUT_CURSOR_LEFT_ARROW, IDC_ARROW );
1160 MAP_CURSOR( GLUT_CURSOR_INFO, IDC_HELP );
1161 MAP_CURSOR( GLUT_CURSOR_DESTROY, IDC_CROSS );
1162 MAP_CURSOR( GLUT_CURSOR_HELP, IDC_HELP );
1163 MAP_CURSOR( GLUT_CURSOR_CYCLE, IDC_SIZEALL );
1164 MAP_CURSOR( GLUT_CURSOR_SPRAY, IDC_CROSS );
1165 MAP_CURSOR( GLUT_CURSOR_WAIT, IDC_WAIT );
1166 MAP_CURSOR( GLUT_CURSOR_TEXT, IDC_UPARROW );
1167 MAP_CURSOR( GLUT_CURSOR_CROSSHAIR, IDC_CROSS );
1168 /* MAP_CURSOR( GLUT_CURSOR_NONE, IDC_NO ); */
1169 ZAP_CURSOR( GLUT_CURSOR_NONE, NULL );
1172 MAP_CURSOR( GLUT_CURSOR_UP_DOWN, IDC_ARROW );
1176 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1180 window->State.Visible = TRUE;
1181 window->State.Redisplay = TRUE;
1185 BeginPaint( hWnd, &ps );
1186 fghRedrawWindowByHandle( hWnd );
1187 EndPaint( hWnd, &ps );
1192 * Make sure we don't close a window with current context active
1194 if( fgStructure.Window == window )
1199 wglMakeCurrent( NULL, NULL );
1201 * Step through the list of windows. If the rendering context
1202 * is not being used by another window, then we delete it.
1204 for( iter = (SFG_Window *)fgStructure.Windows.First;
1206 iter = (SFG_Window *)iter->Node.Next )
1208 if( ( iter->Window.Context == window->Window.Context ) &&
1209 ( iter != window ) )
1214 wglDeleteContext( window->Window.Context );
1218 * Put on a linked list of windows to be removed after all the
1219 * callbacks have returned
1221 fgAddToWindowDestroyList( window, FALSE ) ;
1222 DestroyWindow( hWnd );
1227 * The window already got destroyed, so don't bother with it.
1233 window->State.MouseX = LOWORD( lParam );
1234 window->State.MouseY = HIWORD( lParam );
1236 if ( window->ActiveMenu )
1238 window->State.Redisplay = TRUE ;
1241 * Since the window is a menu, make the parent window current
1243 fgSetWindow ( window->ActiveMenu->ParentWindow ) ;
1248 window->State.Modifiers =
1249 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1250 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1251 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1252 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1253 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1254 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1256 if( ( wParam & MK_LBUTTON ) ||
1257 ( wParam & MK_MBUTTON ) ||
1258 ( wParam & MK_RBUTTON ) )
1260 if( window->Callbacks.Motion )
1262 fgSetWindow( window );
1263 window->Callbacks.Motion( window->State.MouseX,
1264 window->State.MouseY );
1269 if( window->Callbacks.Passive )
1271 fgSetWindow( window );
1272 window->Callbacks.Passive( window->State.MouseX,
1273 window->State.MouseY );
1277 window->State.Modifiers = 0xffffffff;
1281 case WM_LBUTTONDOWN:
1282 case WM_MBUTTONDOWN:
1283 case WM_RBUTTONDOWN:
1288 GLboolean pressed = TRUE;
1291 window->State.MouseX = LOWORD( lParam );
1292 window->State.MouseY = HIWORD( lParam );
1296 case WM_LBUTTONDOWN:
1297 pressed = TRUE; button = GLUT_LEFT_BUTTON; break;
1298 case WM_MBUTTONDOWN:
1299 pressed = TRUE; button = GLUT_MIDDLE_BUTTON; break;
1300 case WM_RBUTTONDOWN:
1301 pressed = TRUE; button = GLUT_RIGHT_BUTTON; break;
1303 pressed = FALSE; button = GLUT_LEFT_BUTTON; break;
1305 pressed = FALSE; button = GLUT_MIDDLE_BUTTON; break;
1307 pressed = FALSE; button = GLUT_RIGHT_BUTTON; break;
1309 pressed = FALSE; button = -1; break;
1312 if( GetSystemMetrics( SM_SWAPBUTTON ) )
1313 if( button == GLUT_LEFT_BUTTON )
1314 button = GLUT_RIGHT_BUTTON;
1315 else if( button == GLUT_RIGHT_BUTTON )
1316 button = GLUT_LEFT_BUTTON;
1319 return DefWindowProc( hWnd, uMsg, lParam, wParam );
1322 * Do not execute the application's mouse callback if a
1323 * menu is hooked to this button.
1324 * In that case an appropriate private call should be generated.
1325 * Near as I can tell, this is the menu behaviour:
1326 * - Down-click the menu button, menu not active: activate
1327 * the menu with its upper left-hand corner at the mouse location.
1328 * - Down-click any button outside the menu, menu active:
1329 * deactivate the menu
1330 * - Down-click any button inside the menu, menu active:
1331 * select the menu entry and deactivate the menu
1332 * - Up-click the menu button, menu not active: nothing happens
1333 * - Up-click the menu button outside the menu, menu active:
1335 * - Up-click the menu button inside the menu, menu active:
1336 * select the menu entry and deactivate the menu
1338 /* Window has an active menu, it absorbs any mouse click */
1339 if( window->ActiveMenu )
1341 /* Inside the menu, invoke the callback and deactivate the menu*/
1342 if( fgCheckActiveMenu( window, window->ActiveMenu ) == TRUE )
1345 * Save the current window and menu and set the current
1346 * window to the window whose menu this is
1348 SFG_Window *save_window = fgStructure.Window;
1349 SFG_Menu *save_menu = fgStructure.Menu;
1350 SFG_Window *parent_window = window->ActiveMenu->ParentWindow;
1351 fgSetWindow( parent_window );
1352 fgStructure.Menu = window->ActiveMenu;
1354 /* Execute the menu callback */
1355 fgExecuteMenuCallback( window->ActiveMenu );
1356 fgDeactivateMenu( parent_window );
1358 /* Restore the current window and menu */
1359 fgSetWindow( save_window );
1360 fgStructure.Menu = save_menu;
1362 else /* Out of menu, deactivate the menu if it's a downclick */
1364 if( pressed == TRUE )
1365 fgDeactivateMenu( window->ActiveMenu->ParentWindow );
1369 * Let's make the window redraw as a result of the mouse
1370 * click and menu activity.
1372 if( ! window->IsMenu )
1373 window->State.Redisplay = TRUE;
1378 if ( ( window->Menu[ button ] != NULL ) && ( pressed == TRUE ) )
1380 window->State.Redisplay = TRUE;
1381 fgSetWindow( window );
1382 fgActivateMenu( window, button );
1387 if( window->Callbacks.Mouse == NULL )
1390 fgSetWindow( window );
1392 fgStructure.Window->State.Modifiers =
1393 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1394 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1395 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1396 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1397 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1398 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1400 window->Callbacks.Mouse(
1402 pressed == TRUE ? GLUT_DOWN : GLUT_UP,
1403 window->State.MouseX,
1404 window->State.MouseY
1407 fgStructure.Window->State.Modifiers = 0xffffffff;
1412 /* Should be WM_MOUSEWHEEL but my compiler doesn't recognize it */
1414 int wheel_number = LOWORD( lParam );
1415 /* THIS IS SPECULATIVE -- John Fay, 10/2/03 */
1416 int ticks = HIWORD( lParam ) / 120;
1417 /* Should be WHEEL_DELTA instead of 120 */
1427 * The mouse cursor has moved. Remember the new mouse cursor's position
1429 /* window->State.MouseX = LOWORD( lParam ); */
1430 /* Need to adjust by window position, */
1431 /* window->State.MouseY = HIWORD( lParam ); */
1432 /* change "lParam" to other parameter */
1434 if( ( window->Callbacks.MouseWheel == NULL ) &&
1435 ( window->Callbacks.Mouse == NULL ) )
1438 fgSetWindow( window );
1439 fgStructure.Window->State.Modifiers =
1440 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1441 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1442 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1443 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1444 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1445 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1448 if( window->Callbacks.MouseWheel )
1449 window->Callbacks.MouseWheel(
1452 window->State.MouseX,
1453 window->State.MouseY
1455 else /* No mouse wheel, call the mouse button callback twice */
1458 * XXX The below assumes that you have no more than 3 mouse
1459 * XXX buttons. Sorry.
1461 int button = wheel_number*2 + 4;
1462 button += (1 + direction)/2;
1463 window->Callbacks.Mouse( button, GLUT_DOWN,
1464 window->State.MouseX,
1465 window->State.MouseY ) ;
1466 window->Callbacks.Mouse( button, GLUT_UP,
1467 window->State.MouseX,
1468 window->State.MouseY ) ;
1471 fgStructure.Window->State.Modifiers = 0xffffffff;
1481 if( fgState.IgnoreKeyRepeat && (lParam & KF_REPEAT) )
1485 * Remember the current modifiers state. This is done here in order
1486 * to make sure the VK_DELETE keyboard callback is executed properly.
1488 window->State.Modifiers =
1489 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1490 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1491 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1492 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1493 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1494 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1496 GetCursorPos( &mouse_pos );
1497 ScreenToClient( window->Window.Handle, &mouse_pos );
1499 window->State.MouseX = mouse_pos.x;
1500 window->State.MouseY = mouse_pos.y;
1503 * Convert the Win32 keystroke codes to GLUTtish way
1505 # define KEY(a,b) case a: keypress = b; break;
1509 KEY( VK_F1, GLUT_KEY_F1 );
1510 KEY( VK_F2, GLUT_KEY_F2 );
1511 KEY( VK_F3, GLUT_KEY_F3 );
1512 KEY( VK_F4, GLUT_KEY_F4 );
1513 KEY( VK_F5, GLUT_KEY_F5 );
1514 KEY( VK_F6, GLUT_KEY_F6 );
1515 KEY( VK_F7, GLUT_KEY_F7 );
1516 KEY( VK_F8, GLUT_KEY_F8 );
1517 KEY( VK_F9, GLUT_KEY_F9 );
1518 KEY( VK_F10, GLUT_KEY_F10 );
1519 KEY( VK_F11, GLUT_KEY_F11 );
1520 KEY( VK_F12, GLUT_KEY_F12 );
1521 KEY( VK_PRIOR, GLUT_KEY_PAGE_UP );
1522 KEY( VK_NEXT, GLUT_KEY_PAGE_DOWN );
1523 KEY( VK_HOME, GLUT_KEY_HOME );
1524 KEY( VK_END, GLUT_KEY_END );
1525 KEY( VK_LEFT, GLUT_KEY_LEFT );
1526 KEY( VK_UP, GLUT_KEY_UP );
1527 KEY( VK_RIGHT, GLUT_KEY_RIGHT );
1528 KEY( VK_DOWN, GLUT_KEY_DOWN );
1529 KEY( VK_INSERT, GLUT_KEY_INSERT );
1533 * The delete key should be treated as an ASCII keypress:
1535 if( window->Callbacks.Keyboard )
1537 fgSetWindow( window );
1538 window->Callbacks.Keyboard( 127, window->State.MouseX,
1539 window->State.MouseY );
1543 if( ( keypress != -1 ) && window->Callbacks.Special )
1545 fgSetWindow( window );
1546 window->Callbacks.Special( keypress, window->State.MouseX,
1547 window->State.MouseY );
1550 window->State.Modifiers = 0xffffffff;
1561 * Remember the current modifiers state. This is done here in order
1562 * to make sure the VK_DELETE keyboard callback is executed properly.
1564 window->State.Modifiers =
1565 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1566 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1567 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1568 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1569 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1570 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1572 GetCursorPos( &mouse_pos );
1573 ScreenToClient( window->Window.Handle, &mouse_pos );
1575 window->State.MouseX = mouse_pos.x;
1576 window->State.MouseY = mouse_pos.y;
1579 * Convert the Win32 keystroke codes to GLUTtish way.
1580 * "KEY(a,b)" was defined under "WM_KEYDOWN"
1585 KEY( VK_F1, GLUT_KEY_F1 );
1586 KEY( VK_F2, GLUT_KEY_F2 );
1587 KEY( VK_F3, GLUT_KEY_F3 );
1588 KEY( VK_F4, GLUT_KEY_F4 );
1589 KEY( VK_F5, GLUT_KEY_F5 );
1590 KEY( VK_F6, GLUT_KEY_F6 );
1591 KEY( VK_F7, GLUT_KEY_F7 );
1592 KEY( VK_F8, GLUT_KEY_F8 );
1593 KEY( VK_F9, GLUT_KEY_F9 );
1594 KEY( VK_F10, GLUT_KEY_F10 );
1595 KEY( VK_F11, GLUT_KEY_F11 );
1596 KEY( VK_F12, GLUT_KEY_F12 );
1597 KEY( VK_PRIOR, GLUT_KEY_PAGE_UP );
1598 KEY( VK_NEXT, GLUT_KEY_PAGE_DOWN );
1599 KEY( VK_HOME, GLUT_KEY_HOME );
1600 KEY( VK_END, GLUT_KEY_END );
1601 KEY( VK_LEFT, GLUT_KEY_LEFT );
1602 KEY( VK_UP, GLUT_KEY_UP );
1603 KEY( VK_RIGHT, GLUT_KEY_RIGHT );
1604 KEY( VK_DOWN, GLUT_KEY_DOWN );
1605 KEY( VK_INSERT, GLUT_KEY_INSERT );
1609 * The delete key should be treated as an ASCII keypress:
1611 if( window->Callbacks.KeyboardUp )
1613 fgSetWindow( window );
1614 window->Callbacks.KeyboardUp( 127, window->State.MouseX,
1615 window->State.MouseY );
1625 GetKeyboardState( state );
1627 if( ToAscii( wParam, 0, state, code, 0 ) == 1 )
1630 if( window->Callbacks.KeyboardUp )
1632 fgSetWindow( window );
1633 window->Callbacks.KeyboardUp( (char)wParam,
1634 window->State.MouseX,
1635 window->State.MouseY );
1640 if( (keypress != -1) && window->Callbacks.SpecialUp )
1642 fgSetWindow( window );
1643 window->Callbacks.SpecialUp( keypress, window->State.MouseX,
1644 window->State.MouseY );
1647 window->State.Modifiers = 0xffffffff;
1654 if( fgState.IgnoreKeyRepeat && (lParam & KF_REPEAT) )
1657 if( window->Callbacks.Keyboard )
1659 fgSetWindow( window );
1660 window->State.Modifiers =
1661 ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
1662 ( GetKeyState( VK_RSHIFT ) < 0 )) ? GLUT_ACTIVE_SHIFT : 0 ) |
1663 ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
1664 ( GetKeyState( VK_RCONTROL ) < 0 )) ? GLUT_ACTIVE_CTRL : 0 ) |
1665 ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
1666 ( GetKeyState( VK_RMENU ) < 0 )) ? GLUT_ACTIVE_ALT : 0 );
1668 window->Callbacks.Keyboard( (char)wParam, window->State.MouseX,
1669 window->State.MouseY );
1670 window->State.Modifiers = 0xffffffff;
1675 case WM_CAPTURECHANGED:
1676 /* User has finished resizing the window, force a redraw */
1677 if( window->Callbacks.Display )
1679 fgSetWindow( window );
1681 window->Callbacks.Display( );
1684 /*lRet = DefWindowProc( hWnd, uMsg, wParam, lParam ) ; */
1688 * Other messages that I have seen and which are not handled already
1690 case WM_SETTEXT: /* 0x000c */
1691 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1692 /* Pass it on to "DefWindowProc" to set the window text */
1695 case WM_GETTEXT: /* 0x000d */
1696 /* Ideally we would copy the title of the window into "lParam" */
1697 /* strncpy ( (char *)lParam, "Window Title", wParam );
1698 lRet = ( wParam > 12 ) ? 12 : wParam; */
1699 /* the number of characters copied */
1700 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1703 case WM_GETTEXTLENGTH: /* 0x000e */
1704 /* Ideally we would get the length of the title of the window */
1706 /* the number of characters in "Window Title\0" (see above) */
1709 case WM_ERASEBKGND: /* 0x0014 */
1710 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1713 case WM_SYNCPAINT: /* 0x0088 */
1714 /* Another window has moved, need to update this one */
1715 window->State.Redisplay = TRUE;
1716 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1717 /* Help screen says this message must be passed to "DefWindowProc" */
1720 case WM_NCPAINT: /* 0x0085 */
1721 /* Need to update the border of this window */
1722 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1723 /* Pass it on to "DefWindowProc" to repaint a standard border */
1728 * Handle unhandled messages
1730 lRet = DefWindowProc( hWnd, uMsg, wParam, lParam );
1738 /*** END OF FILE ***/