| /* |
| Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely. |
| */ |
| |
| /* Simple program: Loop, watching keystrokes |
| Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to |
| pump the event loop and catch keystrokes. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "SDL.h" |
| |
| /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
| static void |
| quit(int rc) |
| { |
| SDL_Quit(); |
| exit(rc); |
| } |
| |
| static void |
| print_string(char **text, size_t *maxlen, const char *fmt, ...) |
| { |
| int len; |
| va_list ap; |
| |
| va_start(ap, fmt); |
| len = SDL_vsnprintf(*text, *maxlen, fmt, ap); |
| if (len > 0) { |
| *text += len; |
| if ( ((size_t) len) < *maxlen ) { |
| *maxlen -= (size_t) len; |
| } else { |
| *maxlen = 0; |
| } |
| } |
| va_end(ap); |
| } |
| |
| static void |
| print_modifiers(char **text, size_t *maxlen) |
| { |
| int mod; |
| print_string(text, maxlen, " modifiers:"); |
| mod = SDL_GetModState(); |
| if (!mod) { |
| print_string(text, maxlen, " (none)"); |
| return; |
| } |
| if (mod & KMOD_LSHIFT) |
| print_string(text, maxlen, " LSHIFT"); |
| if (mod & KMOD_RSHIFT) |
| print_string(text, maxlen, " RSHIFT"); |
| if (mod & KMOD_LCTRL) |
| print_string(text, maxlen, " LCTRL"); |
| if (mod & KMOD_RCTRL) |
| print_string(text, maxlen, " RCTRL"); |
| if (mod & KMOD_LALT) |
| print_string(text, maxlen, " LALT"); |
| if (mod & KMOD_RALT) |
| print_string(text, maxlen, " RALT"); |
| if (mod & KMOD_LGUI) |
| print_string(text, maxlen, " LGUI"); |
| if (mod & KMOD_RGUI) |
| print_string(text, maxlen, " RGUI"); |
| if (mod & KMOD_NUM) |
| print_string(text, maxlen, " NUM"); |
| if (mod & KMOD_CAPS) |
| print_string(text, maxlen, " CAPS"); |
| if (mod & KMOD_MODE) |
| print_string(text, maxlen, " MODE"); |
| } |
| |
| static void |
| PrintKey(SDL_Keysym * sym, SDL_bool pressed, SDL_bool repeat) |
| { |
| char message[512]; |
| char *spot; |
| size_t left; |
| |
| spot = message; |
| left = sizeof(message); |
| |
| /* Print the keycode, name and state */ |
| if (sym->sym) { |
| print_string(&spot, &left, |
| "Key %s: scancode %d = %s, keycode 0x%08X = %s ", |
| pressed ? "pressed " : "released", |
| sym->scancode, |
| SDL_GetScancodeName(sym->scancode), |
| sym->sym, SDL_GetKeyName(sym->sym)); |
| } else { |
| print_string(&spot, &left, |
| "Unknown Key (scancode %d = %s) %s ", |
| sym->scancode, |
| SDL_GetScancodeName(sym->scancode), |
| pressed ? "pressed " : "released"); |
| } |
| print_modifiers(&spot, &left); |
| if (repeat) { |
| print_string(&spot, &left, " (repeat)"); |
| } |
| SDL_Log("%s\n", message); |
| } |
| |
| static void |
| PrintText(char *text) |
| { |
| unsigned char *spot, expanded[1024]; |
| |
| expanded[0] = '\0'; |
| for ( spot = text; *spot; ++spot ) |
| { |
| size_t length = SDL_strlen(expanded); |
| SDL_snprintf(expanded + length, sizeof(expanded) - length, "\\x%.2x", *spot); |
| } |
| SDL_Log("Text (%s): \"%s%s\"\n", expanded, *text == '"' ? "\\" : "", text); |
| } |
| |
| int |
| main(int argc, char *argv[]) |
| { |
| SDL_Window *window; |
| SDL_Event event; |
| int done; |
| |
| /* Initialize SDL */ |
| if (SDL_Init(SDL_INIT_VIDEO) < 0) { |
| fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); |
| return (1); |
| } |
| |
| /* Set 640x480 video mode */ |
| window = SDL_CreateWindow("CheckKeys Test", |
| SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, |
| 640, 480, 0); |
| if (!window) { |
| fprintf(stderr, "Couldn't create 640x480 window: %s\n", |
| SDL_GetError()); |
| quit(2); |
| } |
| |
| #if __IPHONEOS__ |
| /* Creating the context creates the view, which we need to show keyboard */ |
| SDL_GL_CreateContext(window); |
| #endif |
| |
| SDL_StartTextInput(); |
| |
| /* Watch keystrokes */ |
| done = 0; |
| while (!done) { |
| /* Check for events */ |
| SDL_WaitEvent(&event); |
| switch (event.type) { |
| case SDL_KEYDOWN: |
| case SDL_KEYUP: |
| PrintKey(&event.key.keysym, event.key.state, event.key.repeat); |
| break; |
| case SDL_TEXTINPUT: |
| PrintText(event.text.text); |
| break; |
| case SDL_MOUSEBUTTONDOWN: |
| /* Any button press quits the app... */ |
| case SDL_QUIT: |
| done = 1; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| SDL_Quit(); |
| return (0); |
| } |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |