test/checkkeys.c
author Sam Lantinga <slouken@lokigames.com>
Thu, 26 Apr 2001 16:45:43 +0000
changeset 0 74212992fb08
child 473 30466f501b77
permissions -rw-r--r--
Initial revision
     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 static void print_modifiers(void)
    14 {
    15 	int mod;
    16 	printf(" modifiers:");
    17 	mod = SDL_GetModState();
    18 	if(!mod) {
    19 		printf(" (none)");
    20 		return;
    21 	}
    22 	if(mod & KMOD_LSHIFT)
    23 		printf(" LSHIFT");
    24 	if(mod & KMOD_RSHIFT)
    25 		printf(" RSHIFT");
    26 	if(mod & KMOD_LCTRL)
    27 		printf(" LCTRL");
    28 	if(mod & KMOD_RCTRL)
    29 		printf(" RCTRL");
    30 	if(mod & KMOD_LALT)
    31 		printf(" LALT");
    32 	if(mod & KMOD_RALT)
    33 		printf(" RALT");
    34 	if(mod & KMOD_LMETA)
    35 		printf(" LMETA");
    36 	if(mod & KMOD_RMETA)
    37 		printf(" RMETA");
    38 	if(mod & KMOD_NUM)
    39 		printf(" NUM");
    40 	if(mod & KMOD_CAPS)
    41 		printf(" CAPS");
    42 	if(mod & KMOD_MODE)
    43 		printf(" MODE");
    44 }
    45 
    46 static void PrintKey(SDL_keysym *sym, int pressed)
    47 {
    48 	/* Print the keycode, name and state */
    49 	if ( sym->sym ) {
    50 		printf("Key %s:  %d-%s ", pressed ?  "pressed" : "released",
    51 					sym->sym, SDL_GetKeyName(sym->sym));
    52 	} else {
    53 		printf("Unknown Key (scancode = %d) %s ", sym->scancode,
    54 					pressed ?  "pressed" : "released");
    55 	}
    56 
    57 	/* Print the translated character, if one exists */
    58 	if ( sym->unicode ) {
    59 		/* Is it a control-character? */
    60 		if ( sym->unicode < ' ' ) {
    61 			printf(" (^%c)", sym->unicode+'@');
    62 		} else {
    63 #ifdef UNICODE
    64 			printf(" (%c)", sym->unicode);
    65 #else
    66 			/* This is a Latin-1 program, so only show 8-bits */
    67 			if ( !(sym->unicode & 0xFF00) )
    68 				printf(" (%c)", sym->unicode);
    69 #endif
    70 		}
    71 	}
    72 	print_modifiers();
    73 	printf("\n");
    74 }
    75 
    76 int main(int argc, char *argv[])
    77 {
    78 	SDL_Event event;
    79 	int done;
    80 
    81 	/* Initialize SDL */
    82 	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
    83 		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
    84 		exit(1);
    85 	}
    86 	atexit(SDL_Quit);
    87 
    88 	/* Set 640x480 video mode */
    89 	if ( SDL_SetVideoMode(640, 480, 0, SDL_SWSURFACE) == NULL ) {
    90 		fprintf(stderr, "Couldn't set 640x480 video mode: %s\n",
    91 							SDL_GetError());
    92 		exit(2);
    93 	}
    94 
    95 	/* Enable UNICODE translation for keyboard input */
    96 	SDL_EnableUNICODE(1);
    97 
    98 	/* Enable auto repeat for keyboard input */
    99 	SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY,
   100 	                    SDL_DEFAULT_REPEAT_INTERVAL);
   101 
   102 	/* Watch keystrokes */
   103 	done = 0;
   104 	while ( !done ) {
   105 		/* Check for events */
   106 		SDL_WaitEvent(&event);
   107 		switch (event.type) {
   108 			case SDL_KEYDOWN:
   109 				PrintKey(&event.key.keysym, 1);
   110 				break;
   111 			case SDL_KEYUP:
   112 				PrintKey(&event.key.keysym, 0);
   113 				break;
   114 			case SDL_MOUSEBUTTONDOWN:
   115 				/* Any button press quits the app... */
   116 			case SDL_QUIT:
   117 				done = 1;
   118 				break;
   119 			default:
   120 				break;
   121 		}
   122 	}
   123 	return(0);
   124 }