win32_winproc.c

mesa-6.5-minigui源码

    if (__glutMappedMenu) {
      GetCursorPos(&point);
      ScreenToClient(hwnd, &point);
      /* if we're getting the middle button up signal, then something
	 on the menu was selected. */
      if (button == GLUT_MIDDLE_BUTTON) {
	return 0;
	/* For some reason, the code below always returns -1 even
	   though the point IS IN THE ITEM!  Therefore, just bail out if
	   we get a middle mouse up.  The user must select using the
	   left mouse button.  Stupid Win32. */
#if 0
 	int item = MenuItemFromPoint(hwnd, __glutHMenu, point);
 	if (item != -1)
 	  __glutItemSelected = (GLUTmenuItem*)GetMenuItemID(__glutHMenu, item);
 	else
 	  __glutItemSelected = NULL;
 	__glutFinishMenu(hwnd, point.x, point.y);
#endif
      } else {
	__glutItemSelected = NULL;
	__glutFinishMenu(hwnd, point.x, point.y);
      }
      return 0;
    }

    /* Release the mouse capture. */
    ReleaseCapture();

    window = __glutGetWindow(hwnd);
    if (window && window->mouse) {
      /* Win32 doesn't return the same numbers as X does when the
	 mouse goes beyond the upper or left side of the window.  roll
	 the Win32's 0..2^16 pointer co-ord range to 0 +/- 2^15. */
      x = LOWORD(lParam);
      y = HIWORD(lParam);
      if(x & 1 << 15) x -= (1 << 16);
      if(y & 1 << 15) y -= (1 << 16);
      
      __glutSetWindow(window);
      __glutModifierMask = 0;
      if (GetKeyState(VK_SHIFT) < 0)	/* < 0 = high order bit is on */
	__glutModifierMask |= ShiftMask;
      if (GetKeyState(VK_CONTROL) < 0)
	__glutModifierMask |= ControlMask;
      if (GetKeyState(VK_MENU) < 0)
	__glutModifierMask |= Mod1Mask;
      window->mouse(button, GLUT_UP, x, y);
      __glutModifierMask = (unsigned int)~0;
    } else {
      /* Window might have been destroyed and all the 
	 events for the window may not yet be received. */
    }
    return 0;

  case WM_ENTERMENULOOP:
    /* KLUDGE: create a timer that fires every 100 ms when we start a
       menu so that we can still process the idle & timer events (that
       way, the timers will fire during a menu pick and so will the
       idle func. */
    SetTimer(hwnd, 1, 1, NULL);
    return 0;

  case WM_TIMER:
#if 0
    /* If the timer id is 2, then this is the timer that is set up in
       the main glut message processing loop, and we don't want to do
       anything but acknowledge that we got it.  It is used to prevent
       CPU spiking when an idle function is installed. */
    if (wParam == 2)
      return 0;
#endif

    /* only worry about the idle function and the timeouts, since
       these are the only events we expect to process during
       processing of a menu. */
    /* we no longer process the idle functions (as outlined in the
       README), since drawing can't be done until the menu has
       finished...it's pretty lame when the animation goes on, but
       doesn't update, so you get this weird jerkiness. */
#if 0    
     if (__glutIdleFunc)
       __glutIdleFunc();
#endif
    if (__glutTimerList)
      handleTimeouts();
    return 0;

  case WM_EXITMENULOOP:
    /* nuke the above created timer...we don't need it anymore, since
       the menu is gone now. */
    KillTimer(hwnd, 1);
    return 0;

  case WM_MENUSELECT:
    if (lParam != 0)
      __glutHMenu = (HMENU)lParam;
    return 0;

  case WM_COMMAND:
    if (__glutMappedMenu) {
      if (GetSubMenu(__glutHMenu, LOWORD(wParam)))
	__glutItemSelected = NULL;
      else
	__glutItemSelected = 
	  __glutGetUniqueMenuItem(__glutMappedMenu, LOWORD(wParam));
      GetCursorPos(&point);
      ScreenToClient(hwnd, &point);
      __glutFinishMenu(hwnd, point.x, point.y);
    } 
    return 0;

  case WM_MOUSEMOVE:
    if (!__glutMappedMenu) {
      window = __glutGetWindow(hwnd);
      if (window) {
          /* If motion function registered _and_ buttons held *
             down, call motion function...  */
	x = LOWORD(lParam);
	y = HIWORD(lParam);

	/* Win32 doesn't return the same numbers as X does when the
	   mouse goes beyond the upper or left side of the window.
	   roll the Win32's 0..2^16 pointer co-ord range to 0..+/-2^15. */
	if(x & 1 << 15) x -= (1 << 16);
	if(y & 1 << 15) y -= (1 << 16);

	if (window->motion && wParam &
            (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)) {
	  __glutSetWindow(window);
	  window->motion(x, y);
	}
	/* If passive motion function registered _and_
	   buttons not held down, call passive motion
	   function...  */
	else if (window->passive &&
		 ((wParam &
		   (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)) ==
		  0)) {
	  __glutSetWindow(window);
	  window->passive(x, y);
	}
      }
    } else {
      /* Motion events are thrown away when a pop up menu is
	 active. */
    }
    return 0;

  case WM_GETMINMAXINFO:
    /* this voodoo is brought to you by Win32 (again).  It allows the
       window to be bigger than the screen, and smaller than 100x100
       (although it doesn't seem to help the y minimum). */
    minmax = (LPMINMAXINFO)lParam;
    minmax->ptMaxSize.x = __glutScreenWidth;
    minmax->ptMaxSize.y = __glutScreenHeight;
    minmax->ptMinTrackSize.x = 0;
    minmax->ptMinTrackSize.y = 0;
    minmax->ptMaxTrackSize.x = __glutScreenWidth + 
      GetSystemMetrics(SM_CXSIZE) * 2;
    minmax->ptMaxTrackSize.y = __glutScreenHeight + 
      GetSystemMetrics(SM_CXSIZE) * 2 + GetSystemMetrics(SM_CYCAPTION);
    return 0;

  case WM_SIZE:
    window = __glutGetWindow(hwnd);
    if (window) {
      width = LOWORD(lParam);
      height = HIWORD(lParam);
      if (width != window->width || height != window->height) {
#if 0  /* Win32 GLUT does not support overlays for now. */
 	if (window->overlay) {
 	  XResizeWindow(__glutDisplay, window->overlay->win, width, height);
 	}
#endif
	window->width = width;
	window->height = height;
	__glutSetWindow(window);
	/* Do not execute OpenGL out of sequence with respect
	   to the SetWindowPos request! */
	GdiFlush();
	window->reshape(width, height);
	window->forceReshape = FALSE;
	/* A reshape should be considered like posting a
	   repair request. */
	__glutPostRedisplay(window, GLUT_REPAIR_WORK);
      }
    }
    return 0;

  case WM_SETCURSOR:
    /* If the cursor is not in the client area, then we want to send
       this message to the default window procedure ('cause its
       probably in the border or title, and we don't handle that
       cursor.  otherwise, set our cursor.  Win32 makes us set the
       cursor every time the mouse moves (DUMB!). */
    if(LOWORD(lParam) != HTCLIENT) {
      goto defproc;
    }
    window = __glutGetWindow(hwnd);
    if (window) {
      __glutSetCursor(window);
    }
    /* TODO: check out the info in DevStudio on WM_SETCURSOR in the
       DefaultAction section. */
    return 1;

  case WM_SETFOCUS:
    window = __glutGetWindow(hwnd);
    if (window) {
      window->entryState = WM_SETFOCUS;
      if (window->entry) {
	__glutSetWindow(window);
	window->entry(GLUT_ENTERED);
	/* XXX Generation of fake passive notify?  See how much
	   work the X11 code does to support fake passive notify
	   callbacks. */
      }
      if (window->joystick && __glutCurrentWindow) {
        if (__glutCurrentWindow->joyPollInterval > 0) {
	  MMRESULT result;

	  /* Because Win32 will only let one window capture the
	     joystick at a time, we must capture it when we get the
	     focus and release it when we lose the focus. */
	  result = joySetCapture(__glutCurrentWindow->win,
	    JOYSTICKID1, 0, TRUE);
	  if (result != JOYERR_NOERROR) {
	    return 0;
          }
	  (void) joySetThreshold(JOYSTICKID1,
            __glutCurrentWindow->joyPollInterval);
        }
      }
    }
    return 0;

  case WM_KILLFOCUS:
    window = __glutGetWindow(hwnd);
    if (window) {
      window->entryState = WM_KILLFOCUS;
      if (window->entry) {
	__glutSetWindow(window);
	window->entry(GLUT_LEFT);
      }
      if (window->joystick && __glutCurrentWindow) {
	if (__glutCurrentWindow->joyPollInterval > 0) {
	  /* Because Win32 will only let one window capture the
	     joystick at a time, we must capture it when we get the
	     focus and release it when we lose the focus. */
	    (void) joyReleaseCapture(JOYSTICKID1);
        }
      }
    }
    return 0;
  case WM_ACTIVATE:
    window = __glutGetWindow(hwnd);
    /* Make sure we re-select the correct palette if needed. */
    if (LOWORD(wParam)) {
      PostMessage(hwnd, WM_PALETTECHANGED, 0, 0);
    }
    if (window) {
      int visState;

      /* HIWORD(wParam) is the minimized flag. */
      visState = !HIWORD(wParam);
      updateWindowState(window, visState);
    }
    return 0;

  /* Colour Palette Management */
  case WM_PALETTECHANGED:
    if (hwnd == (HWND)wParam) {
      /* Don't respond to the message that we sent! */
      break;
    }
    /* fall through to WM_QUERYNEWPALETTE */

  case WM_QUERYNEWPALETTE:
    window = __glutGetWindow(hwnd);
    if (window && window->colormap) {
      UnrealizeObject(window->colormap->cmap);
      SelectPalette(window->hdc, window->colormap->cmap, FALSE);
      RealizePalette(window->hdc);
      return TRUE;
    }
    return FALSE;

  case MM_JOY1MOVE:
  case MM_JOY1ZMOVE:
    window = __glutGetWindow(hwnd);
    if (window->joystick) {
      JOYINFOEX jix;
      int x, y, z;

      /* Because WIN32 only supports messages for X, Y, and Z
         translations, we must poll for the rest */
      jix.dwSize = sizeof(jix);
      jix.dwFlags = JOY_RETURNALL;
      joyGetPosEx(JOYSTICKID1,&jix);

#define SCALE(v)  ((int) ((v - 32767)/32.768))

      /* Convert to integer for scaling. */
      x = jix.dwXpos;
      y = jix.dwYpos;
      z = jix.dwZpos;
      window->joystick(jix.dwButtons, SCALE(x), SCALE(y), SCALE(z));

      return TRUE;
    }
    return FALSE;
  case MM_JOY1BUTTONDOWN:
  case MM_JOY1BUTTONUP:
    window = __glutGetWindow(hwnd);
    if (window->joystick) {
      JOYINFOEX jix;

      /* Because WIN32 only supports messages for X, Y, and Z
         translations, we must poll for the rest */
      jix.dwSize = sizeof(jix);
      jix.dwFlags = JOY_RETURNALL;
      joyGetPosEx(JOYSTICKID1,&jix);

      return TRUE;
    }
    return FALSE;

#if 0
  /* Miscellaneous messages (don't really need to enumerate them,
     but it's good to know what you're not getting sometimes). */
  case WM_DISPLAYCHANGE:
    break;
  case WM_NCHITTEST:
    /* This event is generated by every mouse move event. */
    goto defproc;
  case WM_NCMOUSEMOVE:
    goto defproc;
  case WM_NCACTIVATE:
    goto defproc;
  case WM_NCPAINT:
    goto defproc;
  case WM_NCCALCSIZE:
    goto defproc;
  case WM_NCCREATE:
    goto defproc;
  case WM_NCDESTROY:
    goto defproc;
  case WM_NCLBUTTONDOWN:
    goto defproc;
  case WM_SETTEXT:
    goto defproc;
  case WM_GETTEXT:
    goto defproc;
  case WM_ACTIVATEAPP:
    goto defproc;
  case WM_GETICON:
    goto defproc;
  case WM_ERASEBKGND:
    goto defproc;
  case WM_WINDOWPOSCHANGING:
    goto defproc;
  case WM_WINDOWPOSCHANGED:
    goto defproc;
  case WM_MOUSEACTIVATE:
    goto defproc;
  case WM_SHOWWINDOW:
    goto defproc;
  case WM_MOVING:
    goto defproc;
  case WM_MOVE:
    goto defproc;
  case WM_KEYUP:
    goto defproc;
  case WM_CAPTURECHANGED:
    goto defproc;
  case WM_SYSCOMMAND:
    goto defproc;
  case WM_ENTERSIZEMOVE:
    goto defproc;
  case WM_ENTERIDLE:
    goto defproc;
#endif

  default: 
    goto defproc;
  }

defproc:    
  return DefWindowProc(hwnd, msg, wParam, lParam); 
}