[Freeglut-developer] Is button numbering of mouse wheel correct?

[Takeshi N. <tak...@us...>]

Is button numbering of mouse wheel correct?
In X11, freeglut maps -1 to 4, +1 to 3.
In Windows, it maps -1 to 4, +1 to 5.
Of cource this depends on environments, but I think there is no Windows environment
acting like X11.
Here is a patch to act like X11 with a little typo fix.
-- 
Takeshi Nishimura

*** freeglut-2.4.0-rc4/src/freeglut_main.c.dist    2005-05-26 02:05:22.000000000 +0000
--- freeglut-2.4.0-rc4/src/freeglut_main.c    2005-05-26 02:05:22.000000001 +0000
*************** LRESULT CALLBACK fgWindowProc( HWND hWnd
*** 1475,1497 ****
                              )
                  );
              else  /* No mouse wheel, call the mouse button callback twice */
              {
                  /*
                   * XXX The below assumes that you have no more than 3 mouse
                   * XXX buttons.  Sorry.
                   */
!                 int button = wheel_number*2 + 4;
!                 if( direction > 0 )
                      ++button;
                  INVOKE_WCB( *window, Mouse,
                              ( button, GLUT_DOWN,
                                window->State.MouseX, window->State.MouseY )
                  );
                  INVOKE_WCB( *window, Mouse,
                              ( button, GLUT_UP,
!                               window->State.MouseX, window->State.MouseX )
                  );
              }
 
          fgState.Modifiers = 0xffffffff;
      }
--- 1475,1500 ----
                              )
                  );
              else  /* No mouse wheel, call the mouse button callback twice */
              {
                  /*
+                  * Map wheel zero to button 3 and 4; +1 to 3, -1 to 4
+                  *  "    "   one                     +1 to 5, -1 to 6, ...
+                  *
                   * XXX The below assumes that you have no more than 3 mouse
                   * XXX buttons.  Sorry.
                   */
!                 int button = wheel_number*2 + 3;
!                 if( direction < 0 )
                      ++button;
                  INVOKE_WCB( *window, Mouse,
                              ( button, GLUT_DOWN,
                                window->State.MouseX, window->State.MouseY )
                  );
                  INVOKE_WCB( *window, Mouse,
                              ( button, GLUT_UP,
!                               window->State.MouseX, window->State.MouseY )
                  );
              }
 
          fgState.Modifiers = 0xffffffff;
      }