| 1 | |
| 2 | /* Simple program: Loop, watching keystrokes |
| 3 | Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to |
| 4 | pump the event loop and catch keystrokes. |
| 5 | */ |
| 6 | |
| 7 | #include <stdio.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <string.h> |
| 10 | |
| 11 | #include "SDL.h" |
| 12 | |
| 13 | /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
| 14 | static void quit(int rc) |
| 15 | { |
| 16 | SDL_Quit(); |
| 17 | exit(rc); |
| 18 | } |
| 19 | |
| 20 | static void print_modifiers(void) |
| 21 | { |
| 22 | int mod; |
| 23 | printf(" modifiers:"); |
| 24 | mod = SDL_GetModState(); |
| 25 | if(!mod) { |
| 26 | printf(" (none)"); |
| 27 | return; |
| 28 | } |
| 29 | if(mod & KMOD_LSHIFT) |
| 30 | printf(" LSHIFT"); |
| 31 | if(mod & KMOD_RSHIFT) |
| 32 | printf(" RSHIFT"); |
| 33 | if(mod & KMOD_LCTRL) |
| 34 | printf(" LCTRL"); |
| 35 | if(mod & KMOD_RCTRL) |
| 36 | printf(" RCTRL"); |
| 37 | if(mod & KMOD_LALT) |
| 38 | printf(" LALT"); |
| 39 | if(mod & KMOD_RALT) |
| 40 | printf(" RALT"); |
| 41 | if(mod & KMOD_LMETA) |
| 42 | printf(" LMETA"); |
| 43 | if(mod & KMOD_RMETA) |
| 44 | printf(" RMETA"); |
| 45 | if(mod & KMOD_NUM) |
| 46 | printf(" NUM"); |
| 47 | if(mod & KMOD_CAPS) |
| 48 | printf(" CAPS"); |
| 49 | if(mod & KMOD_MODE) |
| 50 | printf(" MODE"); |
| 51 | } |
| 52 | |
| 53 | static void PrintKey(SDL_keysym *sym, int pressed) |
| 54 | { |
| 55 | /* Print the keycode, name and state */ |
| 56 | if ( sym->sym ) { |
| 57 | printf("Key %s: %d-%s ", pressed ? "pressed" : "released", |
| 58 | sym->sym, SDL_GetKeyName(sym->sym)); |
| 59 | } else { |
| 60 | printf("Unknown Key (scancode = %d) %s ", sym->scancode, |
| 61 | pressed ? "pressed" : "released"); |
| 62 | } |
| 63 | |
| 64 | /* Print the translated character, if one exists */ |
| 65 | if ( sym->unicode ) { |
| 66 | /* Is it a control-character? */ |
| 67 | if ( sym->unicode < ' ' ) { |
| 68 | printf(" (^%c)", sym->unicode+'@'); |
| 69 | } else { |
| 70 | #ifdef UNICODE |
| 71 | printf(" (%c)", sym->unicode); |
| 72 | #else |
| 73 | /* This is a Latin-1 program, so only show 8-bits */ |
| 74 | if ( !(sym->unicode & 0xFF00) ) |
| 75 | printf(" (%c)", sym->unicode); |
| 76 | else |
| 77 | printf(" (0x%X)", sym->unicode); |
| 78 | #endif |
| 79 | } |
| 80 | } |
| 81 | print_modifiers(); |
| 82 | printf("\n"); |
| 83 | } |
| 84 | |
| 85 | int main(int argc, char *argv[]) |
| 86 | { |
| 87 | SDL_Event event; |
| 88 | int done; |
| 89 | Uint32 videoflags; |
| 90 | |
| 91 | /* Initialize SDL */ |
| 92 | if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { |
| 93 | fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); |
| 94 | return(1); |
| 95 | } |
| 96 | |
| 97 | videoflags = SDL_SWSURFACE; |
| 98 | while( argc > 1 ) { |
| 99 | --argc; |
| 100 | if ( argv[argc] && !strcmp(argv[argc], "-fullscreen") ) { |
| 101 | videoflags |= SDL_FULLSCREEN; |
| 102 | } else { |
| 103 | fprintf(stderr, "Usage: %s [-fullscreen]\n", argv[0]); |
| 104 | quit(1); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /* Set 640x480 video mode */ |
| 109 | if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) { |
| 110 | fprintf(stderr, "Couldn't set 640x480 video mode: %s\n", |
| 111 | SDL_GetError()); |
| 112 | quit(2); |
| 113 | } |
| 114 | |
| 115 | /* Enable UNICODE translation for keyboard input */ |
| 116 | SDL_EnableUNICODE(1); |
| 117 | |
| 118 | /* Enable auto repeat for keyboard input */ |
| 119 | SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, |
| 120 | SDL_DEFAULT_REPEAT_INTERVAL); |
| 121 | |
| 122 | /* Watch keystrokes */ |
| 123 | done = 0; |
| 124 | while ( !done ) { |
| 125 | /* Check for events */ |
| 126 | SDL_WaitEvent(&event); |
| 127 | switch (event.type) { |
| 128 | case SDL_KEYDOWN: |
| 129 | PrintKey(&event.key.keysym, 1); |
| 130 | break; |
| 131 | case SDL_KEYUP: |
| 132 | PrintKey(&event.key.keysym, 0); |
| 133 | break; |
| 134 | case SDL_MOUSEBUTTONDOWN: |
| 135 | /* Any button press quits the app... */ |
| 136 | case SDL_QUIT: |
| 137 | done = 1; |
| 138 | break; |
| 139 | default: |
| 140 | break; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | SDL_Quit(); |
| 145 | return(0); |
| 146 | } |