Mercurial > sdl-ios-xcode
view test/testwm.c @ 2318:0c653886cce7
HandleEvent() returns done each time it is called. If done was set to 0 the program should quit, but because done is not checked until *all* events are handled a
following event can reset done to 1 and prevent the program from terminating when told to. I fixed the while loop that handles events to check for the state of done
after handling each event. That could leave some events unhandled when the program exits, but it ensures that the program will exit.
author | Bob Pendleton <bob@pendleton.com> |
---|---|
date | Wed, 20 Feb 2008 23:27:33 +0000 |
parents | 2032348afed1 |
children | 6d91cff0ec79 |
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/* Test out the window manager interaction functions */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "SDL.h" /* Is the cursor visible? */ static int visible = 1; static Uint8 video_bpp; static Uint32 video_flags; /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ static void quit(int rc) { SDL_Quit(); exit(rc); } int SetVideoMode(int w, int h) { SDL_Surface *screen; int i; Uint8 *buffer; SDL_Color palette[256]; screen = SDL_SetVideoMode(w, h, video_bpp, video_flags); if (screen == NULL) { fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n", w, h, video_bpp, SDL_GetError()); return (-1); } printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ? "fullscreen" : "windowed"); /* Set the surface pixels and refresh! */ for (i = 0; i < 256; ++i) { palette[i].r = 255 - i; palette[i].g = 255 - i; palette[i].b = 255 - i; } SDL_SetColors(screen, palette, 0, 256); if (SDL_LockSurface(screen) < 0) { fprintf(stderr, "Couldn't lock display surface: %s\n", SDL_GetError()); return (-1); } buffer = (Uint8 *) screen->pixels; for (i = 0; i < screen->h; ++i) { memset(buffer, (i * 255) / screen->h, screen->w * screen->format->BytesPerPixel); buffer += screen->pitch; } SDL_UnlockSurface(screen); SDL_UpdateRect(screen, 0, 0, 0, 0); return (0); } SDL_Surface * LoadIconSurface(char *file, Uint8 ** maskp) { SDL_Surface *icon; Uint8 *pixels; Uint8 *mask; int mlen, i, j; *maskp = NULL; /* Load the icon surface */ icon = SDL_LoadBMP(file); if (icon == NULL) { fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError()); return (NULL); } /* Check width and height if ( (icon->w%8) != 0 ) { fprintf(stderr, "Icon width must be a multiple of 8!\n"); SDL_FreeSurface(icon); return(NULL); } */ if (icon->format->palette == NULL) { fprintf(stderr, "Icon must have a palette!\n"); SDL_FreeSurface(icon); return (NULL); } /* Set the colorkey */ SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *) icon->pixels)); /* Create the mask */ pixels = (Uint8 *) icon->pixels; printf("Transparent pixel: (%d,%d,%d)\n", icon->format->palette->colors[*pixels].r, icon->format->palette->colors[*pixels].g, icon->format->palette->colors[*pixels].b); mlen = (icon->w * icon->h + 7) / 8; mask = (Uint8 *) malloc(mlen); if (mask == NULL) { fprintf(stderr, "Out of memory!\n"); SDL_FreeSurface(icon); return (NULL); } memset(mask, 0, mlen); for (i = 0; i < icon->h; i++) for (j = 0; j < icon->w; j++) { int pindex = i * icon->pitch + j; int mindex = i * icon->w + j; if (pixels[pindex] != *pixels) mask[mindex >> 3] |= 1 << (7 - (mindex & 7)); } *maskp = mask; return (icon); } void HotKey_ToggleFullScreen(void) { SDL_Surface *screen; screen = SDL_GetVideoSurface(); if (SDL_WM_ToggleFullScreen(screen)) { printf("Toggled fullscreen mode - now %s\n", (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed"); } else { printf("Unable to toggle fullscreen mode\n"); video_flags ^= SDL_FULLSCREEN; SetVideoMode(screen->w, screen->h); } } void HotKey_ToggleGrab(void) { SDL_GrabMode mode; printf("Ctrl-G: toggling input grab!\n"); mode = SDL_WM_GrabInput(SDL_GRAB_QUERY); if (mode == SDL_GRAB_ON) { printf("Grab was on\n"); } else { printf("Grab was off\n"); } mode = SDL_WM_GrabInput(mode ? SDL_GRAB_OFF : SDL_GRAB_ON); if (mode == SDL_GRAB_ON) { printf("Grab is now on\n"); } else { printf("Grab is now off\n"); } } void HotKey_Iconify(void) { printf("Ctrl-Z: iconifying window!\n"); SDL_WM_IconifyWindow(); } void HotKey_Quit(void) { SDL_Event event; printf("Posting internal quit request\n"); event.type = SDL_USEREVENT; SDL_PushEvent(&event); } static int (SDLCALL * old_filterfunc) (void *, SDL_Event *); static void *old_filterdata; int SDLCALL FilterEvents(void *userdata, SDL_Event * event) { static int reallyquit = 0; if (old_filterfunc) { old_filterfunc(old_filterdata, event); } switch (event->type) { case SDL_ACTIVEEVENT: /* See what happened */ printf("App %s ", event->active.gain ? "gained" : "lost"); if (event->active.state & SDL_APPACTIVE) printf("active "); if (event->active.state & SDL_APPINPUTFOCUS) printf("input "); if (event->active.state & SDL_APPMOUSEFOCUS) printf("mouse "); printf("focus\n"); /* See if we are iconified or restored */ if (event->active.state & SDL_APPACTIVE) { printf("App has been %s\n", event->active.gain ? "restored" : "iconified"); } return (0); /* We want to toggle visibility on buttonpress */ case SDL_MOUSEBUTTONDOWN: case SDL_MOUSEBUTTONUP: if (event->button.state == SDL_PRESSED) { visible = !visible; SDL_ShowCursor(visible); } printf("Mouse button %d has been %s\n", event->button.button, (event->button.state == SDL_PRESSED) ? "pressed" : "released"); return (0); /* Show relative mouse motion */ case SDL_MOUSEMOTION: #if 0 printf("Mouse motion: {%d,%d} (%d,%d)\n", event->motion.x, event->motion.y, event->motion.xrel, event->motion.yrel); #endif return (0); case SDL_KEYDOWN: if (event->key.keysym.sym == SDLK_ESCAPE) { HotKey_Quit(); } if ((event->key.keysym.sym == SDLK_g) && (event->key.keysym.mod & KMOD_CTRL)) { HotKey_ToggleGrab(); } if ((event->key.keysym.sym == SDLK_z) && (event->key.keysym.mod & KMOD_CTRL)) { HotKey_Iconify(); } if ((event->key.keysym.sym == SDLK_RETURN) && (event->key.keysym.mod & KMOD_ALT)) { HotKey_ToggleFullScreen(); } return (0); /* Pass the video resize event through .. */ case SDL_VIDEORESIZE: return (1); /* This is important! Queue it if we want to quit. */ case SDL_QUIT: if (!reallyquit) { reallyquit = 1; printf("Quit requested\n"); return (0); } printf("Quit demanded\n"); return (1); /* This will never happen because events queued directly to the event queue are not filtered. */ case SDL_USEREVENT: return (1); /* Drop all other events */ default: return (0); } } int main(int argc, char *argv[]) { SDL_Event event; const char *title; SDL_Surface *icon; Uint8 *icon_mask; int parsed; int w, h; if (SDL_Init(SDL_INIT_VIDEO) < 0) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); return (1); } /* Check command line arguments */ w = 640; h = 480; video_bpp = 8; video_flags = SDL_SWSURFACE; parsed = 1; while (parsed) { if ((argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0)) { video_flags |= SDL_FULLSCREEN; argc -= 1; argv += 1; } else if ((argc >= 2) && (strcmp(argv[1], "-resize") == 0)) { video_flags |= SDL_RESIZABLE; argc -= 1; argv += 1; } else if ((argc >= 2) && (strcmp(argv[1], "-noframe") == 0)) { video_flags |= SDL_NOFRAME; argc -= 1; argv += 1; } else if ((argc >= 3) && (strcmp(argv[1], "-width") == 0)) { w = atoi(argv[2]); argc -= 2; argv += 2; } else if ((argc >= 3) && (strcmp(argv[1], "-height") == 0)) { h = atoi(argv[2]); argc -= 2; argv += 2; } else if ((argc >= 3) && (strcmp(argv[1], "-bpp") == 0)) { video_bpp = atoi(argv[2]); argc -= 2; argv += 2; } else { parsed = 0; } } /* Set the icon -- this must be done before the first mode set */ icon = LoadIconSurface("icon.bmp", &icon_mask); if (icon != NULL) { SDL_WM_SetIcon(icon, icon_mask); } if (icon_mask != NULL) free(icon_mask); /* Set the title bar */ if (argv[1] == NULL) title = "Testing 1.. 2.. 3..."; else title = argv[1]; SDL_WM_SetCaption(title, "testwm"); /* See if it's really set */ SDL_WM_GetCaption(&title, NULL); if (title) printf("Title was set to: %s\n", title); else printf("No window title was set!\n"); /* Initialize the display */ if (SetVideoMode(w, h) < 0) { quit(1); } /* Set an event filter that discards everything but QUIT */ SDL_GetEventFilter(&old_filterfunc, &old_filterdata); SDL_SetEventFilter(FilterEvents, NULL); /* Ignore key up events, they don't even get filtered */ SDL_EventState(SDL_KEYUP, SDL_IGNORE); /* Loop, waiting for QUIT */ while (SDL_WaitEvent(&event)) { switch (event.type) { case SDL_VIDEORESIZE: printf("Got a resize event: %dx%d\n", event.resize.w, event.resize.h); SetVideoMode(event.resize.w, event.resize.h); break; case SDL_USEREVENT: printf("Handling internal quit request\n"); /* Fall through to the quit handler */ case SDL_QUIT: printf("Bye bye..\n"); quit(0); default: /* This should never happen */ printf("Warning: Event %d wasn't filtered\n", event.type); break; } } printf("SDL_WaitEvent() error: %s\n", SDL_GetError()); SDL_Quit(); return (255); }