diff --git a/examples/demo/01-snake/snake.c b/examples/demo/01-snake/snake.c index 0aca862d75..8c3f488939 100644 --- a/examples/demo/01-snake/snake.c +++ b/examples/demo/01-snake/snake.c @@ -21,6 +21,9 @@ #define THREE_BITS 0x7U /* ~CHAR_MAX >> (CHAR_BIT - SNAKE_CELL_MAX_BITS) */ #define SHIFT(x, y) (((x) + ((y) * SNAKE_GAME_WIDTH)) * SNAKE_CELL_MAX_BITS) +static SDL_Joystick *joystick = NULL; + + typedef enum { SNAKE_CELL_NOTHING = 0U, @@ -238,6 +241,26 @@ static SDL_AppResult handle_key_event_(SnakeContext *ctx, SDL_Scancode key_code) return SDL_APP_CONTINUE; } +static SDL_AppResult handle_hat_event_(SnakeContext *ctx, Uint8 hat) { + switch (hat) { + case SDL_HAT_RIGHT: + snake_redir(ctx, SNAKE_DIR_RIGHT); + break; + case SDL_HAT_UP: + snake_redir(ctx, SNAKE_DIR_UP); + break; + case SDL_HAT_LEFT: + snake_redir(ctx, SNAKE_DIR_LEFT); + break; + case SDL_HAT_DOWN: + snake_redir(ctx, SNAKE_DIR_DOWN); + break; + default: + break; + } + return SDL_APP_CONTINUE; +} + SDL_AppResult SDL_AppIterate(void *appstate) { AppState *as = (AppState *)appstate; @@ -305,7 +328,8 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) } } - if (!SDL_Init(SDL_INIT_VIDEO)) { + if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK)) { + SDL_Log("Couldn't initialize SDL: %s", SDL_GetError()); return SDL_APP_FAILURE; } @@ -316,7 +340,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) *appstate = as; - if (!SDL_CreateWindowAndRenderer("examples/demo/snake", SDL_WINDOW_WIDTH, SDL_WINDOW_HEIGHT, 0, &as->window, &as->renderer)) { + if (!SDL_CreateWindowAndRenderer("examples/snake", SDL_WINDOW_WIDTH, SDL_WINDOW_HEIGHT, 0, &as->window, &as->renderer)) { return SDL_APP_FAILURE; } @@ -333,6 +357,20 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) switch (event->type) { case SDL_EVENT_QUIT: return SDL_APP_SUCCESS; + case SDL_EVENT_JOYSTICK_ADDED: + if (joystick == NULL) { + joystick = SDL_OpenJoystick(event->jdevice.which); + if (!joystick) { + SDL_Log("Failed to open joystick ID %u: %s", (unsigned int) event->jdevice.which, SDL_GetError()); + } + } + case SDL_EVENT_JOYSTICK_REMOVED: + if (joystick && (SDL_GetJoystickID(joystick) == event->jdevice.which)) { + SDL_CloseJoystick(joystick); + joystick = NULL; + } + case SDL_EVENT_JOYSTICK_HAT_MOTION: + return handle_hat_event_(ctx, event->jhat.value); case SDL_EVENT_KEY_DOWN: return handle_key_event_(ctx, event->key.scancode); } @@ -341,6 +379,9 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) void SDL_AppQuit(void *appstate, SDL_AppResult result) { + if (joystick) { + SDL_CloseJoystick(joystick); + } if (appstate != NULL) { AppState *as = (AppState *)appstate; SDL_DestroyRenderer(as->renderer);