sdl_sysevents.c

Simple DirectMedia Layer - Simple DirectMedia Layer 是一个跨平台的多媒体库设计用来提供快速图形framebuffer和音频驱动。应用MPEG为软件

						break;
					case WM_LBUTTONUP:
						button = SDL_BUTTON_LEFT;
						state = SDL_RELEASED;
						break;
					case WM_MBUTTONDOWN:
						button = SDL_BUTTON_MIDDLE;
						state = SDL_PRESSED;
						break;
					case WM_MBUTTONUP:
						button = SDL_BUTTON_MIDDLE;
						state = SDL_RELEASED;
						break;
					case WM_RBUTTONDOWN:
						button = SDL_BUTTON_RIGHT;
						state = SDL_PRESSED;
						break;
					case WM_RBUTTONUP:
						button = SDL_BUTTON_RIGHT;
						state = SDL_RELEASED;
						break;
					default:
						/* Eh? Unknown button? */
						return(0);
				}
				if ( state == SDL_PRESSED ) {
					/* Grab mouse so we get up events */
					if ( ++mouse_pressed > 0 ) {
						SetCapture(hwnd);
					}
				} else {
					/* Release mouse after all up events */
					if ( --mouse_pressed <= 0 ) {
						ReleaseCapture();
						mouse_pressed = 0;
					}
				}
				if ( mouse_relative ) {
				/*	RJR: March 28, 2000
					report internal mouse position if in relative mode */
					x = 0; y = 0;
				} else {
					x = (Sint16)LOWORD(lParam);
					y = (Sint16)HIWORD(lParam);
				}
				posted = SDL_PrivateMouseButton(
							state, button, x, y);
			}
		}
		return(0);


#if (_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400)
		case WM_MOUSEWHEEL: 
			if ( SDL_VideoSurface && ! DINPUT_FULLSCREEN() ) {
				int move = (short)HIWORD(wParam);
				if ( move ) {
					Uint8 button;
					if ( move > 0 )
						button = SDL_BUTTON_WHEELUP;
					else
						button = SDL_BUTTON_WHEELDOWN;
					posted = SDL_PrivateMouseButton(
						SDL_PRESSED, button, 0, 0);
					posted |= SDL_PrivateMouseButton(
						SDL_RELEASED, button, 0, 0);
				}
			}
			return(0);
#endif

#ifdef WM_GETMINMAXINFO
		/* This message is sent as a way for us to "check" the values
		 * of a position change.  If we don't like it, we can adjust
		 * the values before they are changed.
		 */
		case WM_GETMINMAXINFO: {
			MINMAXINFO *info;
			RECT        size;
			int x, y;
			int width;
			int height;

			/* We don't want to clobber an internal resize */
			if ( SDL_resizing )
				return(0);

			/* We allow resizing with the SDL_RESIZABLE flag */
			if ( SDL_PublicSurface &&
				(SDL_PublicSurface->flags & SDL_RESIZABLE) ) {
				return(0);
			}

			/* Get the current position of our window */
			GetWindowRect(SDL_Window, &size);
			x = size.left;
			y = size.top;

			/* Calculate current width and height of our window */
			size.top = 0;
			size.left = 0;
			if ( SDL_PublicSurface != NULL ) {
				size.bottom = SDL_PublicSurface->h;
				size.right = SDL_PublicSurface->w;
			} else {
				size.bottom = 0;
				size.right = 0;
			}
			AdjustWindowRect(&size, GetWindowLong(hwnd, GWL_STYLE),
									FALSE);
			width = size.right - size.left;
			height = size.bottom - size.top;

			/* Fix our size to the current size */
			info = (MINMAXINFO *)lParam;
			info->ptMaxSize.x = width;
			info->ptMaxSize.y = height;
			info->ptMaxPosition.x = x;
			info->ptMaxPosition.y = y;
			info->ptMinTrackSize.x = width;
			info->ptMinTrackSize.y = height;
			info->ptMaxTrackSize.x = width;
			info->ptMaxTrackSize.y = height;
		}
		return(0);
#endif /* WM_GETMINMAXINFO */

		case WM_WINDOWPOSCHANGED: {
			SDL_VideoDevice *this = current_video;
			int w, h;

			GetClientRect(SDL_Window, &SDL_bounds);
			ClientToScreen(SDL_Window, (LPPOINT)&SDL_bounds);
			ClientToScreen(SDL_Window, (LPPOINT)&SDL_bounds+1);
			w = SDL_bounds.right-SDL_bounds.left;
			h = SDL_bounds.bottom-SDL_bounds.top;
			if ( this->input_grab != SDL_GRAB_OFF ) {
				ClipCursor(&SDL_bounds);
			}
			if ( SDL_PublicSurface && 
				(SDL_PublicSurface->flags & SDL_RESIZABLE) ) {
				SDL_PrivateResize(w, h);
			}
		}
		break;

		/* We need to set the cursor */
		case WM_SETCURSOR: {
			Uint16 hittest;

			hittest = LOWORD(lParam);
			if ( hittest == HTCLIENT ) {
				SetCursor(SDL_hcursor);
				return(TRUE);
			}
		}
		break;

		/* We are about to get palette focus! */
		case WM_QUERYNEWPALETTE: {
			WIN_RealizePalette(current_video);
			return(TRUE);
		}
		break;

		/* Another application changed the palette */
		case WM_PALETTECHANGED: {
			WIN_PaletteChanged(current_video, (HWND)wParam);
		}
		break;

		/* We were occluded, refresh our display */
		case WM_PAINT: {
			HDC hdc;
			PAINTSTRUCT ps;

			hdc = BeginPaint(SDL_Window, &ps);
			if ( current_video->screen &&
			     !(current_video->screen->flags & SDL_OPENGL) ) {
				WIN_WinPAINT(current_video, hdc);
			}
			EndPaint(SDL_Window, &ps);
		}
		return(0);

		/* DJM: Send an expose event in this case */
		case WM_ERASEBKGND: {
			posted = SDL_PrivateExpose();
		}
		return(0);

		case WM_CLOSE: {
			if ( (posted = SDL_PrivateQuit()) )
				PostQuitMessage(0);
		}
		return(0);

		case WM_DESTROY: {
			PostQuitMessage(0);
		}
		return(0);

		default: {
			/* Special handling by the video driver */
			if (HandleMessage) {
				return(HandleMessage(current_video,
			                     hwnd, msg, wParam, lParam));
			}
		}
		break;
	}
	return(DefWindowProc(hwnd, msg, wParam, lParam));
}

/* Allow the application handle to be stored and retrieved later */
static void *SDL_handle = NULL;

void SDL_SetModuleHandle(void *handle)
{
	SDL_handle = handle;
}
void *SDL_GetModuleHandle(void)
{
	void *handle;

	if ( SDL_handle ) {
		handle = SDL_handle;
	} else {
		/* Warning:
		   If SDL is built as a DLL, this will return a handle to
		   the DLL, not the application, and DirectInput may fail
		   to initialize.
		 */
		handle = GetModuleHandle(NULL);
	}
	return(handle);
}

/* This allows the SDL_WINDOWID hack */
const char *SDL_windowid = NULL;

/* Register the class for this application -- exported for winmain.c */
int SDL_RegisterApp(char *name, Uint32 style, void *hInst)
{
	static int initialized = 0;
	WNDCLASS class;
#ifdef WM_MOUSELEAVE
	HMODULE handle;
#endif

	/* Only do this once... */
	if ( initialized ) {
		return(0);
	}

	/* This function needs to be passed the correct process handle
	   by the application.
	 */
	if ( ! hInst ) {
		hInst = SDL_GetModuleHandle();
	}

	/* Register the application class */
	class.hCursor		= NULL;
#ifdef _WIN32_WCE
	{
		/* WinCE uses the UNICODE version */
		int nLen = strlen(name)+1;
		SDL_Appname = malloc(nLen*2);
		MultiByteToWideChar(CP_ACP, 0, name, -1, SDL_Appname, nLen);
	}
#else
	{
		int nLen = strlen(name)+1;
		SDL_Appname = malloc(nLen);
		strcpy(SDL_Appname, name);
	}
#endif /* _WIN32_WCE */
	class.hIcon		= LoadImage(hInst, SDL_Appname, IMAGE_ICON,
	                                    0, 0, LR_DEFAULTCOLOR);
	class.lpszMenuName	= NULL;
	class.lpszClassName	= SDL_Appname;
	class.hbrBackground	= NULL;
	class.hInstance		= hInst;
	class.style		= style;
#ifdef HAVE_OPENGL
	class.style		|= CS_OWNDC;
#endif
	class.lpfnWndProc	= WinMessage;
	class.cbWndExtra	= 0;
	class.cbClsExtra	= 0;
	if ( ! RegisterClass(&class) ) {
		SDL_SetError("Couldn't register application class");
		return(-1);
	}
	SDL_Instance = hInst;

#ifdef WM_MOUSELEAVE
	/* Get the version of TrackMouseEvent() we use */
	_TrackMouseEvent = NULL;
	handle = GetModuleHandle("USER32.DLL");
	if ( handle ) {
		_TrackMouseEvent = (BOOL (WINAPI *)(TRACKMOUSEEVENT *))GetProcAddress(handle, "TrackMouseEvent");
	}
	if ( _TrackMouseEvent == NULL ) {
		_TrackMouseEvent = WIN_TrackMouseEvent;
	}
#endif /* WM_MOUSELEAVE */

	/* Check for SDL_WINDOWID hack */
	SDL_windowid = getenv("SDL_WINDOWID");

	initialized = 1;
	return(0);
}