SDL: test/checkkeys.c@30466f501b77

     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 */

     7 #include <stdio.h>

     8 #include <stdlib.h>

     9 #include <string.h>

    11 #include "SDL.h"

    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 }

    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 	}

    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 }

    76 int main(int argc, char *argv[])

    77 {

    78 	SDL_Event event;

    79 	int done;

    80 	Uint32 videoflags;

    82 	/* Initialize SDL */

    83 	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {

    84 		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());

    85 		exit(1);

    86 	}

    87 	atexit(SDL_Quit);

    89 	videoflags = SDL_SWSURFACE;

    90 	if ( strcmp(argv[1], "-fullscreen") == 0 ) {

    91 		videoflags |= SDL_FULLSCREEN;

    92 	}

    94 	/* Set 640x480 video mode */

    95 	if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) {

    96 		fprintf(stderr, "Couldn't set 640x480 video mode: %s\n",

    97 							SDL_GetError());

    98 		exit(2);

    99 	}

   101 	/* Enable UNICODE translation for keyboard input */

   102 	SDL_EnableUNICODE(1);

   104 	/* Enable auto repeat for keyboard input */

   105 	SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY,

   106 	                    SDL_DEFAULT_REPEAT_INTERVAL);

   108 	/* Watch keystrokes */

   109 	done = 0;

   110 	while ( !done ) {

   111 		/* Check for events */

   112 		SDL_WaitEvent(&event);

   113 		switch (event.type) {

   114 			case SDL_KEYDOWN:

   115 				PrintKey(&event.key.keysym, 1);

   116 				break;

   117 			case SDL_KEYUP:

   118 				PrintKey(&event.key.keysym, 0);

   119 				break;

   120 			case SDL_MOUSEBUTTONDOWN:

   121 				/* Any button press quits the app... */

   122 			case SDL_QUIT:

   123 				done = 1;

   124 				break;

   125 			default:

   126 				break;

   127 		}

   128 	}

   129 	return(0);

   130 }

author	Sam Lantinga <slouken@libsdl.org>
	Sun, 25 Aug 2002 18:59:11 +0000
changeset 473	30466f501b77
parent 0	74212992fb08
child 493	806fcbde0af3
permissions	-rw-r--r--